vwdave

Long time no hear, got out of the whole F-Body thing to pursue other interests.

A customer/buddy wants me to set him up a 88 Formula L98 to run 1/8th mile. I dont have alot of experience with 1/8th mile, mostly Im a 1/4 mile guy. His goals for the build are as follows.

100mph 1/8th mile trap speed
Able to drive to the track
AC/PS/Brakes
100+ passes with minimal issues
Wants to stay a 350 (I have no idea why, Im going to try to talk him into letting me go 383)
Th350 Transmission w/brake

How much power will I need for a bad driver to trap 100mph? Im going to build a motor and spray about 150hp to start and hope I dont need drastically more. The basic setup Im considering is a 355 with Trickflow 23 heads, 9.5:1 compression, xe276HR cam, a single plane and 750cfm carb.

Thoughts?

AlkyIROC

By the time you reach the 1/8 mile mark, you should already be in high gear. The last 1/8 mile is just a high gear, brute HP pull to the 1/4 mile mark.

Unless you're trying to do something really special, just build it like any other car for 1/4 mile. If it was track only then that would be different.

100 MPH in the 1/8 with only a 350 and some NOS is going to be pushing it. I don't have my calculator available but I'm guessing you need at least a 10 second (1/4 mile) street car. Probably need to run around 6.8s in the 1/8 to hit 100 mph. That's going to need a lot of power or a lot of weight reduction.

My low 9 second race car does the 1/8 at 120 mph and I'm set up perfectly for the 1/4 mile.

Orr89RocZ

iTrader: (20)

Whats the car weigh?

Typical 3400 lb setup will need 500 whp to tickle 100 mph

My 383 made 392whp on motor and 150 shot which may have done 100-120 whp, went 103mph.

Thats doable on a 355, but i would run bigger cam than that and wouldnt mind seeing afr or profiler 195's over the trick flows unless you plan on doin some minor portwork. I would run 10.5:1 comp and a xe282hr or so. Good dual spring like the afr 8017-8019's.

Gear up abit and with 4000 stall it should do ok

vwdave

Thanks for the help so far guys. I was kinda suspecting that I was going to need more power than what I originally planned but wasnt sure. I guess Ill have to make some tweaks to the setup then.

Hey Justin, long time buddy. I ended up selling the black car. I have a 500whp Duramax, a LS1 Formula, and a 4wd VW Jetta thats being setup for well over 600whp.

KWIK84

iTrader: (5)

FWIW...My setup goes 95mph N/A @~2950 lbs. that is with a DA of around 4500' IIRC

10:1 360 sbc
215 old style Dart Iron Eagles
Single Plane HVH intake
XR292 cam
750 BG alky carb

TH400 with 9.5" ~3800 RPM stall speed
4.71 gears and 28 x 10.5 stiff sidewall slicks

DIGGLER

iTrader: (1)

Similar to mine.
350 lt1 stock shortblock ~11.0:1
Cnc ported stock heads
236/248 hydro roller
Single plane efi with a plate
Th400/ 3.89 gear. 9.5" converter
275 drag radials
3050-3100lbs with driver

Would normally run 94-95mph n/a, 112ish with 100 shot, and 114-115 with 150 shot.

joe2844

I'll be the first to say it. Why not swap a carbd 5.3 with a 150 shot. In my full weight driven to the track streetcar, I've gone 6.90@102 many times. It's a simple swap and it works.

mw66nova

iTrader: (13)

i second doing an ls engine swap. carb vs efi will be up to you. (or your customer).