LS1TECH - Camaro and Firebird Forum Discussion
LS1-LS2-LS3-LS6-LS7 PERFORMANCE
Forced Induction
Valve Float, Back pressure, or Ignition

Forced Induction Superchargers | Turbochargers | Intercoolers

Valve Float, Back pressure, or Ignition

Reply Subscribe

Search this Thread

Old

May 24, 2010 | 09:33 PM

#1

Thread Starter

On The Tree

iTrader: (3)

Joined: Sep 2005

Posts: 135

Likes: 0

Default

Valve Float, Back pressure, or Ignition

Just lookign for more opinions before I spend money chasing...

I have dual valve springs they were measured 140 on the seat. Turbonetics t76 .81 ar housing. Ls2 running 14 psi.

Here's the dyno... the ignition system was went over pretty extensively on thy dyno trying to figure out what was the problem.

Could the .81 housing be my problem? Or could it be the springs.

Old

May 24, 2010 | 11:50 PM

#2

TECH Addict

iTrader: (77)

Joined: May 2002

Posts: 2,107

Likes: 2

From: louisville,ky

Default

A .96 housing is definitely a better choice for the combination. How is the exhaust post turbo?

Old

May 25, 2010 | 05:46 AM

#3

TECH Addict

iTrader: (9)

Joined: Mar 2004

Posts: 2,726

Likes: 1

From: COLUMBUS GA.

Default

yeah looks like back pressure is floating the valves.

Old

May 25, 2010 | 06:03 AM

#4

Thread Starter

On The Tree

iTrader: (3)

Joined: Sep 2005

Posts: 135

Likes: 0

Default

The exhaust post turbo is 3" for about 3 feet, then stepped up to 3.5" for the rest of the way.

Old

May 25, 2010 | 07:14 AM

#5

TECH Addict

iTrader: (9)

Joined: Mar 2004

Posts: 2,726

Likes: 1

From: COLUMBUS GA.

Default

That ar size is more for a 346, a 364 is a nice differance.

Old

May 25, 2010 | 08:34 AM

#6

LS1Tech Sponsor

iTrader: (10)

Joined: Mar 2004

Posts: 4,439

Likes: 4

From: Spring Lake, MI

Default

Call FI and get a 1.15 housing for it.

Reply Subscribe

back, dyno, engine, float, floating, ignition, lsx, pressure, turbo, valve, valves

First
Prev
1 / 1
Next
Last

All times are GMT -5. The time now is 12:16 AM.