Street Racing & Kill Stories - Turbo Integra Vs. H/C 100 shot C6 Z06

Hello LS1Tech. I know most of you thought I got banned..... or died LOL..... but the truth is I didn't want to return until I had finally made a 10 sec pass. It seems as if the drag race gods are conspiring against me. My car is a roll race god.... but gets to the track and becomes scared. If it doesn't rain..... then some little stupid thing prevents me from running. Tonight was my last chance of the season.... and of course it rains.

Well roll racing has been kind to me until last sunday. I lost twice..... once to a GSXR 1000 and once to a Lg headers Cam and 100 shot C6 Z06. He claims to be only making 600rwhp. Before people chime in about 70mph start speeds...... thats what we do so get over it. Anyways.... to the race. We started at 70.... I was brake boosting 3rd and at the hit he immediately pulled 2 cars on me. When I shifted to 4th.... I started to reel him in and I must have gotten too excited because I missed 5th!!!

He opened up about a 7-10 car gap and the race was basically over. I got it in 5th and started reeling him in like crazy and ended up losing by about 4 cars. I asked if he let off when he saw how far back I was and he said no because he has had bad experiences with other turbo cars that come flying by him before the bridge..... Supras Vipers and Camaros!!! He said in final drive his car falls on its face because its basically an overdrive. I asked him to race again but he had to get home. We are supposed to do it again this sunday. There is a vid of this race.... hopefully the guy who shot it has posted it.

Sorry about the long write up.

h/c and 100 shot and only 600.i would think he would trap near 135 or so.so when you say he put 10 on you(missed gear) but you started pulling back.that does not sound right.i am going off your 130 trap

h/c and 100 shot and only 600.i would think he would trap near 135 or so.so when you say he put 10 on you(missed gear) but you started pulling back.that does not sound right.i am going off your 130 trap

That 130 trap was my old set up at only 520whp. My new set up on channel 2 is 26psi and should be somewhere around 650whp. I haven't put her on a dyno yet.... just street tuned on my wide band. My friends integra with the same set up made 656whp @ 26psi. Channel 3 is down right scary..... 34psi and probably700+whp

Good race man but its weird that H/C 100Shot ZO6 Falls on its on any gear.
with that setup that car should be 9s and close to 700rwhp.

Next time get on video.

that integra is the definitive sleeper. you are sick, twisted and unloved by jesus.

No one is unloved by Jesus...it does sound like a sick car though

and a h/c z06 should put down like 550+ rwhp and then add another 100rwhp from the n20, i highly doubt it falls on its face....

No one is unloved by Jesus...

Hmmm how about this guy?

http://www.uniquecarsandparts.com.au/images/years/1971/charles_manson.jpg

It's a respectable death when you lose to any C6 Z, nevermind one w/ nitrous and a cam. Can't wait to see the vid and good luck on the next run. Don't miss a gear next time!!! :jest:

When he says it falls on its face.... I'm sure its relatively speaking. His final drive probably just doesn't pull quite as hard as his other gears. My car is just the opposite..... 5th is my money gear!!!! That's when I get traction. I'll definitely get a race on vid for you guys. There are 4 fast vettes that come out to play nearly every week. The guy who filmed this race has a h/c 175 shot C6 that runs neck and neck with the C6 Z that I raced. And the C6 Z that I raced last year.... here's the vid... http://www.youtube.com/watch?v=OSLouwvBX9g is now putting down 598rwhp N/A. He's a pro race car driver and a purist.... he refuses to go with a power adder.

When he says it falls on its face.... I'm sure its relatively speaking. His final drive probably just doesn't pull quite as hard as his other gears. My car is just the opposite..... 5th is my money gear!!!! That's when I get traction. I'll definitely get a race on vid for you guys. There are 4 fast vettes that come out to play nearly every week. The guy who filmed this race has a h/c 175 shot C6 that runs neck and neck with the C6 Z that I raced. And the C6 Z that I raced last year.... here's the vid... http://www.youtube.com/watch?v=OSLouwvBX9g is now putting down 598rwhp N/A. He's a pro race car driver and a purist.... he refuses to go with a power adder.
Nice vid. 598 NA is pretty sick.

sorry dude, i dont not beleave you were reeling him in. he's more areodynamic, not sure on weight, but even if you are making 650, he should be making that and some with H/C, and a 100 shot. not to mention the fact if your on a 4 cyl, your probably making a whopping 300WTQ, with that 650 +/- Whp.

sorry, but i just dont beleave it.

mod list?

Not a bad run....

When he says it falls on its face.... I'm sure its relatively speaking. His final drive probably just doesn't pull quite as hard as his other gears. My car is just the opposite..... 5th is my money gear!!!! That's when I get traction. I'll definitely get a race on vid for you guys. There are 4 fast vettes that come out to play nearly every week. The guy who filmed this race has a h/c 175 shot C6 that runs neck and neck with the C6 Z that I raced. And the C6 Z that I raced last year.... here's the vid... http://www.youtube.com/watch?v=OSLouwvBX9g is now putting down 598rwhp N/A. He's a pro race car driver and a purist.... he refuses to go with a power adder.

Who won that race? I can't tell much from the video.

very hard to believe.....bs

thats a respectable integra... good run

calling major bullshit... you are NOT going to pull in your words, "Hard" on a c6 Z with those mods. bullfuckingshit all day long, and im calling it twice today. hes more aero dynamic then you, and i guarantee he will out top speed that shitbox of yours any day of the week. the car does 198mph STOCK!!!!! your integra runs out of gearing at like what, 150? its a 125mph car bone stock, and you are claiming to "pull him hard" after you missed a gear? no fucking way.

calling major bullshit... you are NOT going to pull in your words, "Hard" on a c6 Z with those mods. bullfuckingshit all day long, and im calling it twice today. hes more aero dynamic then you, and i guarantee he will out top speed that shitbox of yours any day of the week. the car does 198mph STOCK!!!!! your integra runs out of gearing at like what, 150? its a 125mph car bone stock, and you are claiming to "pull him hard" after you missed a gear? no fucking way.

Well first of all a stock GS-R will do ~140mph stock. Gearing (4.40) with the STOCK REDLINE (8,157rpm) limits the car to a touch over 160mph, but *gasp* you can raise the redline and go faster. Especially in a 2700lb car with as much power as he has. His car is obviously VERY fast guys... quit hating :judge:

calling major bullshit... you are NOT going to pull in your words, "Hard" on a c6 Z with those mods. bullfuckingshit all day long, and im calling it twice today. hes more aero dynamic then you, and i guarantee he will out top speed that shitbox of yours any day of the week. the car does 198mph STOCK!!!!! your integra runs out of gearing at like what, 150? its a 125mph car bone stock, and you are claiming to "pull him hard" after you missed a gear? no fucking way.

I don't mind people calling bs. Ther is no vid and even when there is some people still call bs. For some people its hard to believe that an Integra can outrun a Headers... Cam..... Nitrous... C6 Z06 no matter what the Integra has done to it. That's understandable. What ticks me off is people like you who have no idea what they are talking about spouting misinformation. First.... my car weighs 500 pounds less than a C6 Z06. Second.... I probably have way more power.

If you would like to be informed about my car's high speed capabilities.... go to this gear calculator..... http://www.fatboyraceworks.com/gears/. In the tire diameter box type in 26 for my tire height. Type in 9500 for my redline. Then in the box for what tranny I have.... click on the (USDM GSR, JDM 93-01 SiR) tranny and learn something. For the other guy who swears my car makes 300tq..... my car made 387 before.... it should be closer to 500 now......... THAT'S ALL!!!!

awesome video, thats a great place to watch a race from!!!! sweet gsr too, whats your setup?

what weight reduction do you have done? must be ALOT to weigh 500LBS less than a C6Z

Um, no... a 4-door GS-R is right at 2,700lbs. My '94 coupe GS-R was 2,650.

Um, no... a 4-door GS-R is right at 2,700lbs. My '94 coupe GS-R was 2,650.

Today was a really good day!!!! I ran a vette that beat the vette I lost to last week..... and a skittle that made 580whp on a mustang dyno.... so he is well over 600whp. both wins. I knew if I didn't miss 5th it would be a hell of a race with that Z06. The C6 I raced today barely beat that Z06. Yes I have vids...... Yes I will upload them asap.

I don't mind people calling bs. Ther is no vid and even when there is some people still call bs. For some people its hard to believe that an Integra can outrun a Headers... Cam..... Nitrous... C6 Z06 no matter what the Integra has done to it. That's understandable. What ticks me off is people like you who have no idea what they are talking about spouting misinformation. First.... my car weighs 500 pounds less than a C6 Z06. Second.... I probably have way more power.

If you would like to be informed about my car's high speed capabilities.... go to this gear calculator..... http://www.fatboyraceworks.com/gears/. In the tire diameter box type in 26 for my tire height. Type in 9500 for my redline. Then in the box for what tranny I have.... click on the (USDM GSR, JDM 93-01 SiR) tranny and learn something. For the other guy who swears my car makes 300tq..... my car made 387 before.... it should be closer to 500 now......... THAT'S ALL!!!!

i dont care about your rice calculator. bottom line is, you dont have the top end speed to pull a c6 Z. the car does 198 stock! you couldnt dream of doing that in your ricebox. if you have video great. get the guy to state his mods on camera. anyone can edit something into a video, its not rocket science.

bottom line, you will NEVER pull a heads/cam nitrous C6 Z06. thats a 650rwhp car MINIMUM with much better gearing/torque. not with your power, not with 50 more hp, not past 150. please, your car has ZERO top end gear wise. it wasnt meant to go that high and it wont.

Well first of all a stock GS-R will do ~140mph stock. Gearing (4.40) with the STOCK REDLINE (8,157rpm) limits the car to a touch over 160mph, but *gasp* you can raise the redline and go faster. Especially in a 2700lb car with as much power as he has. His car is obviously VERY fast guys... quit hating :judge: ROFL

yeah, ok. how long would it take to get to 140? couple days?

im not hating, im saying that this is the internet. i dont buy it one bit. that C6 Z is a fucking 9 second car driven right with probably a 145mph trap.

i dont care about your rice calculator. bottom line is, you dont have the top end speed to pull a c6 Z. the car does 198 stock! you couldnt dream of doing that in your ricebox. if you have video great. get the guy to state his mods on camera. anyone can edit something into a video, its not rocket science.

bottom line, you will NEVER pull a heads/cam nitrous C6 Z06. thats a 650rwhp car MINIMUM with much better gearing/torque. not with your power, not with 50 more hp, not past 150. please, your car has ZERO top end gear wise. it wasnt meant to go that high and it wont.
Saying you don't care what a gear calculator says.... is like saying you don't care about reality. To you 1 + 1 is 4879"I say your car can't be faster than a H/C 100 Shot C6 Z06... so it has to be true!!!!" well its not true!!!! It's idiots like you that make idiot import owners think ALL domestic heads are idiots. With enough money.... any car can be made to do damn near anything. The guy who owns the C6 Z06 said himself it only made 600rwhp... so I have a much better HP/Weight Ratio and a taller final drive......(since I can rev my car to 9500+). The only reason why the race is even close... is because my car is wrong wheel drive. Bottom line.... my car is faster!!!! Get over it. Now quicker is a different story!!!

That is one sick GS-R and some great kills. It's nice having that 9500 redline - gives your motor a lot more flexibility.

Jim

Nice race.

No doubt that is a fast car.

how can you say a 650+ whp/giant turbo integra with a 9500 redline doesn't have top end? I'm sure that thing screams to redline, especially in 4th and 5th gear...

Fast lil fucker, no doubt.


...and I hate to say it but, the only reason why people hate,...is cause they have no real experience with something along the lines of this particular car(turbocharged 4 cylinder that weighs nothing). I became a believer it lightweight power when I was head to head with a 400whp *****,...and I had my 399rwhp cam only frc. Great race from 70-160....side by side. If I wasn't wearing my fancy driving shoes,,...lil jit would have beat me.

Anyways people,..stop the hate. It sucks but,..it's very possible. Personally have never seen the back of a 4 cylinder(raced them making between 380whp and 500+whp)....but,..i'm guessing I haven't ran accross a lil mutant bastard yet. And, in south florida.... thats all I see is fucking midget BIG turbo 4 cylinders. And,..gotta tell you, they fuck shit up.

Nice runs HUNTER.....would like to hear some audio and see that race(s).

J

ROFL

yeah, ok. how long would it take to get to 140? couple days?

im not hating, im saying that this is the internet. i dont buy it one bit. that C6 Z is a fucking 9 second car driven right with probably a 145mph trap.

You can't be serious.

ROFL

yeah, ok. how long would it take to get to 140? couple days?

im not hating, im saying that this is the internet. i dont buy it one bit. that C6 Z is a fucking 9 second car driven right with probably a 145mph trap.

Well I had my '94 coupe up to 135mph with a passenger and the windows/sunroof open... didn't take THAT long. It would wind out 4th gear (~124mph) pretty quick, and when you shift to 5th you're already over 6,000rpm. It's called gearing vs. powerband :judge:

One question, how does a cammed and n20 fed C6Z06 only put down 600whp? They can put 600whp with just a cam, if it was bolt-ons plus a 100 shot it should be putting down 600whp. Either somethings wrong with that car or he didnt spray when he put 600 out, Im not hating or saying his car is or should be faster than yours but I am a little confused. And Gsrhunter can you please post some dynos or timeslips, all of your guessing on your cars numbers may be what makes people so complacent or apprehensive toward you.

One question, how does a cammed and n20 fed C6Z06 only put down 600whp? They can put 600whp with just a cam, if it was bolt-ons plus a 100 shot it should be putting down 600whp. Either somethings wrong with that car or he didnt spray when he put 600 out, Im not hating or saying his car is or should be faster than yours but I am a little confused. And Gsrhunter can you please post some dynos or timeslips, all of your guessing on your cars numbers may be what makes people so complacent or apprehensive toward you.

If I remember correctly, he posted some HEALTHY (500whp+) numbers on his old setup, and his new setup is running more boost(?)...

i hope i never roll up on the interstate with you hunter...you have an impressive car

One question, how does a cammed and n20 fed C6Z06 only put down 600whp? They can put 600whp with just a cam, if it was bolt-ons plus a 100 shot it should be putting down 600whp. Either somethings wrong with that car or he didnt spray when he put 600 out, Im not hating or saying his car is or should be faster than yours but I am a little confused. And Gsrhunter can you please post some dynos or timeslips, all of your guessing on your cars numbers may be what makes people so complacent or apprehensive toward you.

I actually was skeptical when jamie (Z06) told me he was only making 600rwhp. I thought he was sandbagging me..... but jamie is a cool guy.... and since I have no idea how much power my car makes.... it didn't matter anyway. I just wanted to run. The lingenfelter car definitely made 625rwhp.... so I know my car is in the 600whp range. Hopefully I'll have my ignition system done next week so we can turn up the boost on the dyno.

She should make somewhere in the 750whp range. As for timeslips.... I really believe my car is afraid of the track. It performs so well at the high speed runs.... but everytime I go to the track.... some little stupid thing goes wrong.....or it rains. Hopefully next season I finally get her in the 10's!!! My tuner says I may just skip over 10's all together!!!! LOL

To the OP, does the Z06 have Heads or Headers? 2 completely different things. You state H/C which would be Heads and Cam for the topic but yet typed headers/cam. Which one is it?

You have a very good trap speed but your car is gonna fight you because of the FWD. Hope you have a real good set of stickies.

sorry dude, i dont not beleave you were reeling him in. he's more areodynamic, not sure on weight, but even if you are making 650, he should be making that and some with H/C, and a 100 shot. not to mention the fact if your on a 4 cyl, your probably making a whopping 300WTQ, with that 650 +/- Whp.

sorry, but i just dont beleave it.

mod list?

"Unfortunately, *engine* torque does not tell you the full story. What matters is the torque *delivered to the tires*, including the effects of the transmission. We all know a car does not accelerate as hard in second gear at peak torque RPM as it does in first gear. The transmission amplifies or multiplies the torque coming from the engine by a factor equal to the gear ratio. So to determine how much the car is accelerating at a particular instant, you have to know both the torque output of the engine as well as the gear ratio."
Taken from http://www.allpar.com/eek/hp-vs-torque.html

torque to the ground in a low gear can be huge (9500 rpm redline=really low gears)

I have not looked at gsrhunters setup thoroughly, but at these speeds with the proper gears he can easily put down more torque to the ground than that vette

Your sig say 11.4 @ 130 and you made 570 whp on 24 psi. Which is impressive but I just think it's it's funny because my friend think his GSR making 307 on 10 psi is gonna run low 12's. lol

Your sig say 11.4 @ 130 and you made 570 whp on 24 psi. Which is impressive but I just think it's it's funny because my friend think his GSR making 307 on 10 psi is gonna run low 12's. lol

It's possible. 307whp and a 2800 pound car. It's all about traction. And certainly easier to do with less power.

But the way, That's one quick car you have there gsrhunter. Certainly surprises allot of people. No matter how you look at it, a 2800 pound car with 600+whp is going to be fast. Like you said, not necessarily quick because of fwd, but certainly fast on the open road. :D

what I dont get is dude, if you dont get traction until 5th gear, why not invest some money in better gripping tires?

what I dont get is dude, if you dont get traction until 5th gear, why not invest some money in better gripping tires?

I've bet he tried them all. :D

I seen a guy at the local shop mustang dyno.

He was driving a 575whp civic on this mustang dyno. :devil: I would of never believed it if I didn't see it for myself. It weighed 2500 pounds. He told me, car is scarry fast, traps 150+mph and he can't get it to hook period. Tried every tire possible. Can only put so much tire under the car.

That's a die hard racer, period.

what I dont get is dude, if you dont get traction until 5th gear, why not invest some money in better gripping tires?

Trust me I have the biggest and stickiest tires that will fit on my car. Until someone makes a tire compound made of superglue..... you will never get high horsepower fwd cars traction!!! I bet I would probably spin those!!!! LMAO

http://i33.photobucket.com/albums/d70/kideja/000_0100.jpg

Your sig say 11.4 @ 130 and you made 570 whp on 24 psi. Which is impressive but I just think it's it's funny because my friend think his GSR making 307 on 10 psi is gonna run low 12's. lol

Actually the 11.4 @ 130 was done on 500whp. My friend johns integra made 656whp and he is trapping 142mph. We are at the same boost level with the same set up and turbo. His tune is more aggressive than mine so I'm probably around 600whp. He only does quarter mile.... I like high speed runs so we have to be a little more conservative.

damn that car looks plain and ...well slow. But it sure as hell moves out, nice sleeper and good luck getting in the 10's.

Trust me I have the biggest and stickiest tires that will fit on my car. Until someone makes a tire compound made of superglue..... you will never get high horsepower fwd cars traction!!! I bet I would probably spin those!!!! LMAO

http://i33.photobucket.com/albums/d70/kideja/000_0100.jpg

I guess thats why real cars dont power the front wheels but lift them. Haha sorry I had to, props on the car anyway, looks like alot of sweat and blood went into it.

love watching the race from that view, perfect place man.
Ive never seen an integra that damn fast, but i wont see its impossible, because i know better than that.
i dont know how hard you can pull on a Z06 after missing a gear, but i believe it would be somewhat close or maybe even a different outcome if you hadnt missed a gear.
lets see a vid
good race, no shame losing to a Z06

One question, how does a cammed and n20 fed C6Z06 only put down 600whp? They can put 600whp with just a cam, if it was bolt-ons plus a 100 shot it should be putting down 600whp. Either somethings wrong with that car or he didnt spray when he put 600 out, Im not hating or saying his car is or should be faster than yours but I am a little confused. And Gsrhunter can you please post some dynos or timeslips, all of your guessing on your cars numbers may be what makes people so complacent or apprehensive toward you.

show me a cam only c6 z06 that puts down 600 horsepower. Mild head/cam setups are in the 550 range from waht i've seen.

Nice runs GSRhunter, I am also driving a high HP GSR powered 4 door sleeper :)

Nice runs GSRhunter, I am also driving a high HP GSR powered 4 door sleeper :)
Did you see the video of me Vs. a 625rwhp lingenfelter C6? Its in this section!!!

run against a twin turbo lingenfelter at 1000+ horses at the motor.
that would be interesting if you could take one of those, those things are monsters.
youtube it. lingenfelter vs dsm
thats a non-turbo to the best of my knowledge, and to spank a 13 second car so badly, its pretty quick. not that 13 is that great at all, i run elevens and feel slow but still, its a gorgeous vette and sounds amazing.

run against a twin turbo lingenfelter at 1000+ horses at the motor.
that would be interesting if you could take one of those, those things are monsters.
youtube it. lingenfelter vs dsm
thats a non-turbo to the best of my knowledge, and to spank a 13 second car so badly, its pretty quick. not that 13 is that great at all, i run elevens and feel slow but still, its a gorgeous vette and sounds amazing.

Huh?!!!!! What are you talking about? The vette in this vid ran a 10.6 on street tires. I'm not sure his mph..... but I can ask him on sunday.

GSRhunter, what kind of gears are you running or did you change all the gears inside the trans? That's why alot of people are calling BS because of the gearing. But if you can show that your gearing is made for top end, it will be more believable. I know that regular tegs run 4.56s and as stated earlier, the gsr runs 4.40s. With your higher redline and say 3.73s, it can happen. Also was it a heads/cam vette or headers/cam vette?

Dude, a 9,500rpm redline would yield a theoretical gearing limit of ~190mph with the stock GS-R transmission...

Dude, a 9,500rpm redline would yield a theoretical gearing limit of ~190mph with the stock GS-R transmission...

Do you happen to know offhand all the gear numbers in the trans? Want to post a graph up but I need those numbers.

Do you happen to know offhand all the gear numbers in the trans? Want to post a graph up but I need those numbers.

grshunter posted it already where to find the info. Certainly a nice link for acura/honda info. Same idea as camaro/firebird/corvette, http://www.f-body.org/gears site.


If you would like to be informed about my car's high speed capabilities.... go to this gear calculator..... http://www.fatboyraceworks.com/gears/. In the tire diameter box type in 26 for my tire height. Type in 9500 for my redline. Then in the box for what tranny I have.... click on the (USDM GSR, JDM 93-01 SiR) tranny and learn something.

i remember reading an article somewhere (not the motor trend one where it broke the diff.) that one of them on DR's ran a little lower than what you said.
theres more than one type of lingenfelter, so i didnt know if you raced a supercharged one, a twin turbo one or what?

Hmmmmmm......... 650hp gsr I can dig it ! hell there was a 500+hp hatch running mid 12 on street tires the car dosent pull untill 4th gear and still trap 130. I think you would walk him in your power to weight is higher than his. Every body knows less weight+power+traction= faster times. Unless you sit down and do the math hp to weight is where its at. not just 600hp vs 700hp Come on people the guy built a dam fast car and if was to beat a c6 zo6 he did a dm good job. There are hundreds of cars that can beat it hell if chevy owned everything on the road driving would suck. Big ups to the gsr owner.

grshunter posted it already where to find the info. Certainly a nice link for acura/honda info. Same idea as camaro/firebird/corvette, http://www.f-body.org/gears site.

Thanks that's exactly what I was looking for but I must have missed that link he posted. Wanted to put the graph on here since it's easier too look at instead of people inputing the numbers into the fields. Here's how his gearing and mph will look like, so with the power he's making, it's believable.

Tire Diameter 26 in

RPM Redline

Max RPM 9500 RPM

Transmission & Gear Ratios

Ratio Max MPH
1st Gear 3.23:1 51.73 MPH
2nd Gear 1.9:1 87.93 MPH
3rd Gear 1.36:1 122.85 MPH
4th Gear 1.034:1 161.58 MPH
5th Gear 0.787:1 212.29 MPH

Final Drive 4.4 :1

Ok, I was just doing a rough guesstimation of the mph he'd be able to hit in 5th based off what I remember from my GS-R. It was actually pretty convenient; if I was going 60mph in 5th gear, I was turning exactly (according to the tach) 3,000rpm... if I was going 70mph it would be 3,500rpm, and so on and so forth. So I just doubled 9,500rpm.

why would anyone throw it in 6th gear on a z06? or any stock rear end f-body, vette thats a six speed?? makes no sense imo since these cars reach top speed in 5th. but oh well nice death anyways

Thanks that's exactly what I was looking for but I must have missed that link he posted. Wanted to put the graph on here since it's easier too look at instead of people inputing the numbers into the fields. Here's how his gearing and mph will look like, so with the power he's making, it's believable.

Tire Diameter 26 in

RPM Redline

Max RPM 9500 RPM

Transmission & Gear Ratios

Ratio Max MPH
1st Gear 3.23:1 51.73 MPH
2nd Gear 1.9:1 87.93 MPH
3rd Gear 1.36:1 122.85 MPH
4th Gear 1.034:1 161.58 MPH
5th Gear 0.787:1 212.29 MPH

Final Drive 4.4 :1


Yes, he said 5th gear was his money gear. Pulls like crazy.:D