00blacka4

iTrader: (7)

SOOOOOO, i have a stock ls1 car and im on a mission for some MPH....my car dead hooks on the street where we race after a good burnout so im always ahead till the 1/8th mile then the fast cars come around....

i trapped 113 the last track visit (11.7 with a 1.54)

since then heres what i have changed that will effect MPH
113
+2 -210lbs dead weigh (includes rear dragbrakes so partial rotating)
+1 -70lbs rotating weight (skinnies/fattys billit specialties)
+1.5 tony mamo 102/102 over ls6, Racepump, ARH 1 7/8 headers over hooker
(also lowered with heaterhose mod in back and coilovers in front)
117.5 TOTAL

Heres what im planning for a little more on the big end this summer
+1.5 Going to E85, usually gives 5% on N/A cars from what everyone says
+1 Vacuum pump (suposed to also give 5% but being conservative)
120 TOTAL

Im thinking this should make my car alot more competative especially on the big end where i have the disadvantage....besides more weight reduction what other pointers does anyone have to help me get more MPH outta this thing....i also know my shift point on the 1-2 was a low 6050 which i think needs to go up to about 6300

bjamick

iTrader: (31)

Either A) More power, or B) Weight reduction. Those are the ways to increase trap speed. Looks like you have a good plan, as for the numbers I'm not so sure of.

lemons12

iTrader: (71)

You won't hit 120 with that stuff if your weight is around what I think it is. Those are very generous numbers.

Number one thing, weight.

What was you race weight on 113, what is it now?

JL ws-6

iTrader: (50)

To go 120, with let's say 370 rwhp, which for a bolt on car.. is pretty good thru an auto trans. Granted you're doing the vacuum pump, which most don't go that far, so you may stand a chance.

I'm going to say, that you need to get the car to about 2750 with you in it. I don't know how light it is now, but I'm going to take an educated guess and say that would probably get you there. Granted it's possible that it can be done at a higher weight then that, but to be realistic, and not rely on some crazy negative DA number and whatnot, 2750 is probably about right.

00blacka4

iTrader: (7)

i mean vacuum pump, and E85...two things people dont do on a bolt on car lol....that might give me some MPH....and i mean i went 113 at a 3400lb race weight...

lemons12

iTrader: (71)

I mark 370ish rwhp... actually probably a bit more they say that Dyno is around
15-25rw off. almost 3500#.
I trap 94.5 in 2200da, I consider that average DA.
I will have a bit more top end than you though since I have heads and cam.

Jl, isn't 95 in the 1/8 right at 120 in the 1/4?

JL ws-6

iTrader: (50)

Depends on the car, power adder, converter effeciency, stick car, how well it 60 foots... too many factors. It's generally in that area, but it's not an end all be all 100% number.

00blacka4

iTrader: (7)

with 316 to the ground (dynoed unlocked) i ran 11.7 at 113 with a 1.54, i thought every 100lbs was about a MPH, and i took out over 200.....and i thought skinnys were atleast a MPH since its 70lbs rotating on top of the 200lbs....that alone puts me at 116 without any of the power things im doing including

tony mamo 102.................................10 hp
electric racepump................................5 hp
ARH 1 7/8 over shitty hooker 1 3/4........5 hp
vacuum pump....................................10 hp
E85............................................... ..10 hp

and some of those things may have more power in them then i estimate....and i was under the impression every 10 hp was about a MPH also....so i was thinking after all that i would be somewhere around 120...

lemons12

iTrader: (71)

No doubt... Was pretty sure 94-96mph was right in the ball park of 120.
Same goes with 6.9=10.9... It varies but that seems to be the case in most scenarios.
You have to remember, the faster you go and the more you are pushing the limits, the less you are gaining.

I dont see 4mph from those mods. I would expect 2.5 maybe 3, anything more is awesome. I would expect a full mph from 100# dead weight either, its more like 130#.

Not trying to get you down its just what I would expect/assume given the setup.

I think weight will be the biggest contributing or hindering factor.

00blacka4

iTrader: (7)

so what about everything i have listed, vacuum pump, E85....haha i want that 120 trap i think with that and the way my car leaves on the street ill be very competative...and theres a DSM around here that traped 128 last year and he upped the boost and got a new intake manifold so he was at 508 AWHP last year probably quite a bit more this year....AWD on Hoosiers...and i really wanna run him i just think i need more on the big end in order to not let him come around me like a freight train...ill have him for awhile but thats alot of MPH

samdogmx

iTrader: (14)

Just to give u a comparison my car trapped 120mph last year. All stock with a ls6 intake & headers at 2880 raceweight.

Higgs Boson

iTrader: (3)

My Z06 ran 10.86 at 129 with a 1.65 60ft at 3180 race weight and 500 rwhp, just to help your figures.

Now it is about 3000 race weight with 725 rwhp so I'm hoping to go high 9's at 14X.....except I have a feeling something will snap first.... :-(

My race car, btw, is 2980 lbs race weight with about 480 at the wheels??? and runs 128 in good weather...1.40 sixtys give or take.

zracer323

iTrader: (12)

At your hp level, I doubt 10 hp will net 1 mph. I would be surprised to see a 3 mph increase from those mods. 200 lbs taken out will get you at least 1.5 mph and the skinnies 0.5-1 mph. My expectations would be 117-118 trap. If you can find another 250-300 lbs to take out of the car, you may just get that 120. THis is all assuming a good DA of course.

JL ws-6

iTrader: (50)

A 200 hit will solve all your problems.. set it up on a progressor, 1.5 seconds and start at about 25 to 30%....

You go trying to run that car and you can forget it.. it's an awd car.. they leave as good as anything on the street.

To get where you want to be... aim for a 2700 lb raceweight, with you in the car. You get the car there with your mods and not only is the car going to leave that much better it should, meet the 120 trap goal that you have.

Put a simple nitrous kit on it at that point and if you can't go 10.70 or better something is really wrong.

00blacka4

iTrader: (7)

nitrous would be fun in this car haha ! but i think with the vacuum pump, E85, and more poundage out i can get my 120 trap i need....yeah that AWD car leaves decently, he usually bogs it though ....it really doesent even turn on till the 1/8th mile then its ***** out....

or i could just put a nice cam in it and solve my MPH issue as well haha but its not as fun as beating people with a stock ls1

JL ws-6

iTrader: (50)

Nitrous is a "bolt on" as far as I'm concerned You just bolt it onto the car. But then again, same goes for a procharger or turbo kit, if it's on a stock motor, fwiw.

If that guy with the DSM car can't get it out of the hole it's because he doesn't know how to drive or the tune is fubar. I know a couple people with those things and if you know what you're doing they will leave pretty good...

BADD SS

iTrader: (4)

youre not getting 120 mph traps with those mods... And even if you do have a car that traps 120, a 500awhp dsm is going to make you look plain silly on the big end too. So your whole plan really doesnt make sense. FWIW, before my clutch exploded, my car trapped 131 mph with ~500 rwhp at 3000 lb raceweight. Although it would have been a bit higher (clutch never really held the power and slipped all the way down the track) its a little reference for you. When I made 418 rwhp, at 3300 lbs raceweight it went 120.5... This is a six speed car too, so it will mph better than your a4 anyway. You wont see 120 at that weight with those mods.

BayAreaSS

iTrader: (10)

I also don't think your plan will get you 120mph. I would add some power. If you want to be sneaky send your heads to advanced inductions or tea and leave the stock cam.

dudeman

iTrader: (43)

put some dope on it to get your top end advantage.

JL ws-6

iTrader: (50)

I'm not going to say that the 120 mph trap speeds aren't possible. Robbie Dowdy's stock internal car went 122 or something like that. His car is light and is very well set up, I do believe he's gone 11.1 or something like that, again stock internal car and I don't think it's anywhere near the 2700 lbs that I know one of these cars can get to.

I can't remember his screen name on mere, promod1955 might be it.. see if you can find his thread about his car. I think he said it made 360 rwhp or something like that. And, it is an auto car as well.