74u

iTrader: (9)

My first passes...Black Mustang

http://s41.photobucket.com/user/wh62...4df24.mp4.html
http://s41.photobucket.com/user/wh62...74883.mp4.html
http://s41.photobucket.com/user/wh62...3aa91.mp4.html


I bought the car as a build in progress earlier this year. The original owner planned to make a street driveable, pump gas nitrous car and built accordingly. My goals are pretty much in line with one exception...I want to set it up to run better on motor and go with a smaller shot. Maybe 100 - 150.

Here is the basic set-up right now...

'89 Notch ~ 3000lbs with me in it
2000 LS1 with stock shortblock & stock #853's
Lunati custom grind - 238/243 - - .600/.600 - - 108LCA
Victor Jr
Holley 750 HP
Kooks LT's 1 7/8"x 3.5" - X-pipe through 2.5" Flowmaster 2 chambers with tail pipes.

PowerGlide - stage 2 by ATF with transbrake
FTI 4000 Billet

3.73's
Hoosier 275/50/15 DOT Drag Radials


I finally got it out to the track last night and made some motor passes. It ran 11.70's four times in a row leaving on the transbrake and two 11.80's leaving on the footbrake. All passes were at 118mph. All 60' times were 1.79 - 1.85 dead hooking every pass...the DA was 2300'+....drove 35 miles to the track and 35 miles home...no problems.

Right now the car is a slug out of the hole. I believe the combination of a MEGA cam on a little motor and the PowerGlide with it's 80mph first gear are the main reason for this.

I want to get the car down in the 10's on motor and maybe low 10's / high 9's on a 150 shot and no loss of streetability.

So, everything is on the table...what would you do next?

I'm thinking maybe ditch the glide for a 400, or a 4L80. And maybe add some good heads and good rods to my little motor. Or maybe keep the glide and build a 6.0 with some good heads/compression...thinking there would be plenty of torque to make the glide work.

What do you guys think?

wildcamaro

iTrader: (15)

Talk about over camming a motor! I would def get rid of that cam unless you want a max effort drag car, same with the glide...

10s on all motor while keeping streetable will be tough do without adding more cubes that's for sure..either way at least the previous owner did all the work getting the LS in there...those foxbody LS cars are fast fun projects, good luck bro

74u

iTrader: (9)

While I don't agree with the combination I will say the guy did an outstanding job on the swap.

As for the cam and Glide...I have no issue with streetability (the cam sounds awesome in fact) but I do have a problem with things slowing my car down

wildcamaro

iTrader: (15)

No doubt that cam prob doesn't make power til 4000rpm or higher I would guess... There are countless threads on here with small cam cars beating up on "donkey dick" cams...in my eyes it's not worth making 10% more power at the top of the powerband compared to a high 220/low 230 duration cam that makes power everywhere...
I've never been a fan of powerglides, I think they are a boring trans, but when it comes to drag racing they are king!

ridnhood

I would have to say that's a perfect cam for a weekend warrior deal. I have close to the same cam in mine been 6.50s and 10.30s pump gas. Have another 6.0 in now with an even bigger donkey dick hung in its *** ,last night went 6.05@ 117.7 on one stage, with a slippery 1.40 60'. Keep the glide go to 430 gear, and get a bigger carb... Just my 2 cents

74u

iTrader: (9)

Do you think it's perfect in my combo? Stock 5.7 & stock heads.

4.30 would be brutal on the street.

TXsilverado

iTrader: (18)

what does that thing weigh? FWIW i'm building my s10 with a similar cam. 237/242 on a 110 lsa...in a 6.0 with TFS heads, 4.10 gears a 4,600 converter and 65e. I don't think you're over cammed...just geared wrong or not enough nitrous

74u

iTrader: (9)

I'd guess around 3K with me in it...haven't been able to weigh it yet. Considering I want to be able to drive on the highway I'm reluctant to go with more gear on a non-O.D. trans.

I'm sure a 150 shot will wake it up but i'd really like to run a little better on motor.

ZONES89RS

iTrader: (25)

Welcome to the club. I know I need more converter. Went from 3450 lbs with a manual and 4.30s to 3000 with a th400 and 3.73. 3450 was 7.1s all day, the musang is 3000 lbs with a best of 7.2 with 2 more mph than the 3450 weight.

Going to go 4.10 when I can.

toxic99

If you keep the glide, go with 4.30 gear imo. Yes it will suck on the highway but, that is the trade off. Prolly wont be as bad as you think since you have a tall tire on there. Also, did you look at the timing tune in the box? Didi you play with the carb tune at all? Try uncapping the exhaust? Chokemasters arent known for their "flow" lol. 118 mph trap@ 2300 DA screams bottom 11s possibley very high 10.90s all day long in good weather and right gearing, just sayin.

ridnhood

That's what I was sayn, I just switched to a glide from a 350 and has 410 gear, 1 st pass on motor after change about choked her out w nitrous converter, with 28 tall tire I'm somewhere around 390 gear, that's why I'm going to say 430s. I'd say you need at least an 850 carb also... Some of these guys on here don't like to put a lot of timing on em but I time it up til it starts to drop et/mph and drop back one.. Just another 2 cents.

74u

iTrader: (9)

Thanks for the ideas guys...I thought long & hard about gearing before I installed 3.73's. I'm just not willing to turn this thing into a trailer queen and lose the street use...not to mention when I do spray I would run out of gear with anything higher than 3.73's.

My tires are 275/50/15's which are only 25.6" tall. My 60mph cruising rpm's look like this...
3.55 = 2796rpm
3.73 = 2937rpm
4.10 = 3229rpm
4.30 = 3386rpm

My motor has stock heads, rods, and rod bolts so I decided 6500rpm should probably be the max rpm til I can make some upgrades. Assuming my car has the power to trap 120mph - my NA trap rpm's look like this...
3.55 = 5591rpm
3.73 = 5875rpm
4.10 = 6457rpm
4.30 = 6773rpm

And if I spray 150hp I'm guessing I'd pick up about 12mph...so 132mph looks like this...
3.55 = 6150rpm
3.73 = 6462rpm
4.10 = 7103rpm
4.30 = 7450rpm

None of the above figures account for converter slip. To me the 3.73 was the balance between acceptable cruise rpm and ability to spray the car when I want to.

Is there any reason I shouldn't just swap the Powerglide for a TH-400? My glide is turbo splined so the converter would drop in. Is it a difficult swap? Seems like i could sell my Glide and almost get enough out of it to buy a decent 400...then my gearing would be much better out of the hole and keep a reasonable cruise rpm.

That, or wait til I can afford to stroke my LS1 and just grunt my way off the line

74u

iTrader: (9)

Yes, the timing is at 32* all in around 2200rpm. I bumped it to 33* for a pass and saw no change in ET/MPH so I put it back to 32 for now. Will revisit next outing with a few fresh plugs so I can do some reads.

As for the carb, I haven't had it on a wideband but with very minor tweaks the car runs perfect/responsive and the plugs look great. It has to be pretty close.

toxic99

Try bringin in a bit more timing lower in the rpm band then taper it down to w/e you think is comfortable(to get a bit more low end torque for the 60'). 32 at high rpm is fine but Id try up to 36* imo. If you feel the carb is jetted fine via plug read, play with the timing more going in 2* increments instead of 1. I personally jet for mph then play with timing, but thats me. TH400 will prolly give you more hole shot grunt and possibly more mid range pull, but you still not going to be able to cruise at a low rpm on the highway. And, for some reason, I misread your original post and thought I seen a 275/60 not 50. My bad... GL

ridnhood

At least try more timing.. I agree

74u

iTrader: (9)

Well here is a new development...I weighed the car this morning.

2640LBS w/o me. So my race weight would have been 2865.

Seems like this thing should be quicker & faster even with the gearing flaws, right?

Using a online HP calculator it says 118mph at my weight is about 386HP at the crank

toxic99

Something is way off imo. 2800# car with cammed and carbed ls1 should be ATLEAST in the 11.0 range. I dont think the gears and glide would slow you down that much. Try checking the basics like making sure you're getting full throttle. Hopefully someone else will chime in with some ideas too.

Tan327

iTrader: (15)

Something is definitely off man, that car should be close to a full second quicker when dialed in, and pulling a 1.55 or lower 60'. What all is done to hit that weight?

74u

iTrader: (9)

It's definitely going WOT...maybe I need to get it on a wideband? Kind of baffled here.

As for weight reduction it's a full interior car with power locks/windows/mirrors.

The weight reduction comes from the aluminum motor, tube K-member, tube A-arms, fiberglass hood, weld wheels, manual brakes, manual rack, no heat/AC.

Tan327

iTrader: (15)

I say hook up the wideband and throw it on a dyno to see where it's making power and if the numbers are lower than they should be. I have virtually the same setup in my camaro, only major difference is EFI and almost almost 500lbs heavier, no way I should be quicker.

And very nice swap man, want to sell?