Jim_PA

iTrader: (9)

Everyone else is doing it! But I'd like ET estimates too

LQ4, stock bottom end

Stock 243 Heads (10.4:1 compression)

Lunati 2200 - 6800 CAMSHAFT, GM LS VHRX278-12X 278/282 adv. 227/231 @.050 .651/.651 112/108 LSA/ICL

Stock truck intake

T56 w/4.56 gears and 26" hoosier slicks -- 4000LB truck (race ready w/driver)

1 3/4 headers, 3" duals with x-pipe.

Paint_It_Black

iTrader: (1)

6.0, stock 243's, medium cam with a 51 lobe intensity and good lift, good icl, truck intake is better than an ls6 intake, but the gears and slicks are going to rob you, smaller headers than I would run, but minimal backpressure..

I would say you might see 435 at the wheels.

Jim_PA

iTrader: (9)

What do you think? 1 7/8 headers? I need the 4.56's to get the pig off the line.

Paint_It_Black

iTrader: (1)

Yes, I think 1 7/8ths would be better but not a dire neccessity..

I just meant the gears would not show as much on a dyno but you are making up for that and then some in torque multiplication for the track.

Jim_PA

iTrader: (9)

Gotcha; I'm not familiar with chassis dyno theory -- I hope to have it together by August/September, so I will revive this thread with the track results, good or bad. Previous best was 14.2 @ 98 with 400 FWHP 350 3.73's and a 4 speed manual (same 1st gear as a T56). 60' times were in the 2.0 range, but gearing was not on my side. I think I can cut several tenths off the 60' with the 4.56's.

SweetS10V8

iTrader: (4)

This is incorrect. The standard 1999-2007 truck intakes are terrible, the Trailblazer SS style(on 2007+trucks also) truck intake is better though.

I just saw a dyno test that showed that the FAST 102mm LSXRT truck intake made 20rwhp over the Trailblazer SS intake on the truck forum the other day.

Paint_It_Black

iTrader: (1)

Big Ugly flows better than an LS6 intake.

IWGF

iTrader: (6)

I think it will make..... 7

SweetS10V8

iTrader: (4)

Also incorrect. Ive personally done the test before......

disc0monkey

iTrader: (10)

i feel the 1 3/4 headers will help move that heavy truck off the line compared to the big ones. the large lift/short duration figure should promote high volume in each primary so i see where your coming from, but the split will help to offset that.

crainholio

iTrader: (2)

One zillion horspowerz!!!1!1!!one!!1

Jim_PA

iTrader: (9)

The issue with headers is that nobody makes a set in anything other than 1 5/8. I'm going to have to go by pictures, and hope that eventually I can find some that are close enough.

Jim_PA

iTrader: (9)

What is your guess on ET?

SweetS10V8

iTrader: (4)

What truck is it going in that only has 1 5/8" headers avaliable??

Jim_PA

iTrader: (9)

'68 Chevy C10 -- Thorley makes headers that fit, but only in 1 5/8.

I'm going to look into 68-74 Chevelle headers (unless I find a better option.) They are dynatech, and are 1 7/8 - 1 3/4