1982z28with18s

I'm going to be running a weird combination this first time around, just too see how much power I can make on stock heads/cam/intake/tb. I plan on a 383 over winter with some LE heads, custom cam, and probably a stand alone fuel system.

Details for now:

355 9.5:1 compression
stock crank
eagle rods
wiseco pistons
splayed mains
all arp hardware
1074 head gaskets
STOCK intake
STOCK TB
STOCK cam
1.6 rr's
lt4 valve springs

Th400 with a coan 4000 nitrous converter(tight)
Hybrid 8.8 3.55 gears 33 spline axles spool
26x11.50x15 et streets(going back to my 325/50/15 mt dr's soon)

Real quick's log manifold setup
http://web.camaross.com/forums/showthread.php?t=541874

Turbonetics ball bearing T-76 with a .81 ar
30x12x3 FMIC
3" charge pipe
silicone cuplers w/ all tbolt clamps
3" downpipe connected to a 3" cutout to a stock catback
44mm tial WG
RFL wastegate
Prosport boost guage
Joe P MBC
lc1 wideband w/ XD-1 guage

42lb injectors(60's will go in as soon as I need them)
255 intake pump with a kenne bell boost a pump
obdI conversion tuned by me w/ tunercats(hopefully will soon be going megasquirt)
No p/s, no hvac, no abs, no front bumper support, no sway bar
Engine bay completely wire tucked
hal shocks, bmr tq arm, bmr lca's/panhard rod

The car was a nitrous car, no track times, but did leave wheels up on the street on the spray and put down some modded r1's and 600+ rwhp cars. It made 520rwhp on the 1st stage with an opti issue, gained 17rwhp on motor with the opti fixed and 8 degrees of timing taken out. Never dyno'd it on the 2nd stage.

I'm looking to get back where I was on the 150 shot for now, all pump gas like I was on the nitrous. I'd like to get 525+ rwhp, lots of tq, and be able to bust off some 10's without much issue. I'm not truely concerned with peak #'s, I'd like a decent curve and a good et/mph.

Think it's possible on pump gas with no water injection? Anybody have any guesses how much boost it'll take to get me there and whats your opinion on how much I can make on pump gas?

T/A lt1

I am no forced induction expert but with 15psi you can double the HP of an engine and do that on pumpgas as long as you have an intercooler or I would just run alky that way you could richen it and cool it off at the same time. With the amount you are spending I would go ahead and put a little blower turbo cam while youre at it. Good luck later Clint

RealQuick

Hey Justin, I would try and pick people's brain on that 4k stall. Engineermike has experience with turbo/stall combos. I would pm him for his opinion. You should hit full boost before 4000rpm, so the stall might not be ideal.

1982z28with18s

Thanks clint, I plan on doing some le heads this winter and a cam, but for now I want to see what it will make on stock heads/cam.

Jon, I'm really curious to see how it works also, if it doesn't work out too well, it will go back to Coan to be restalled.

boosted-lt1

Just kind of thinking out loud.... Where does the stock cam peak? 5200-5400? I would think you would want to take advantage of the nice flat torque curve this cam provides. I wouldn't think you need much stall for this setup. But I am no Automatic/Turbo expert so I'll let others provide some more useful info.

RealQuick

Completely stock, an LT1 makes peak tq @ 2400rpm.

When I had full bolt-ons (helping the motor breath better) I made peak tq @ 3200rpm on the dyno.

1982z28with18s

I kept the stall from my nitrous setup to see how it will do, I think 4000 is too big for what I will need in the end, but it might work out fine for now since it's a nitrous stall and is really tight.

windsma

Im no expert either but i think i once heard one say(maybe Banks) for every 1psi of boost there is a 7% increase of power.

at 15psi x 7% = 105% power increase. So your pretty correct in that statement.

Attaus

You can very very easily make 525whp with a T-76.. you'll probably make it on 8 psi, depending on the final setup.

Screw alky.. run meth. Snow performance has a kit for like $350..

RealQuick

If it were me, I'd run an alky/meth kit.

1982z28with18s

My main issue right now is the STOCK HEADS AND STOCK CAM. I know with the heads/cam it will make it easily, but pushing all this power through the stock parts will be fun.

T/A lt1

Well the stock heads shouldn't hurt you too much being that you are force feeding it 15+psi of boost. The stock cam will hinder high rpm but overall you can make 500+rwhp with that setup. We built a turbo LT1 with ported heads, hydraulic roller 230 degrees, T76, and put down 690rwhp@15PSI on pumpgas. The car ran 9.40's@140+mph but the car was taken apart and sold. So this is the route I am thinking about going this winter. Later

Attaus

With the stock parts you make good numbers, with the upgraded head you will get sick numbers.. as was mentioned above. (690whp @ 15 psi)

1982z28with18s

Doing good so far at only 6psi and 15 degrees timing!

RealQuick

[Chanting] dyno.. dyno.. dyno..[/Chanting]