LS1TECH - Camaro and Firebird Forum Discussion

Forced Induction Superchargers | Turbochargers | Intercoolers

A/R size?

Thread Tools
 
Search this Thread
 
Old Nov 22, 2006 | 07:58 PM
Share
  #1  
bigturboz28's Avatar
bigturboz28
Thread Starter
TECH Apprentice
 
Joined: Nov 2005
Posts: 304
Likes: 0
From: Newmarket, Ontario
Default A/R size?
What is the smallest A/R would you recommend on a single front mount T76 for a forged 346?
Reply
0
Old Nov 22, 2006 | 08:49 PM
Share
  #2  
smokinHawk's Avatar
smokinHawk
TECH Senior Member
iTrader: (48)
 
Joined: Jan 2002
Posts: 7,354
Likes: 1
From: Columbus, ohio
Default
.96 is good
though some have done an .81
Reply
0
Old Nov 22, 2006 | 10:55 PM
Share
  #3  
longrange4u's Avatar
longrange4u
9 Second Club
iTrader: (2)
 
Joined: Jun 2005
Posts: 2,034
Likes: 0
From: Reston, VA
Default
Spool time vs: Top end power
Reply
0
Old Nov 23, 2006 | 06:59 AM
Share
  #4  
chuntington101's Avatar
chuntington101
TECH Addict
 
Joined: Aug 2004
Posts: 2,866
Likes: 4
Default
would a .81 be better for a stock cubed LS1 with a sts??

Chris.
Reply
0
Old Nov 23, 2006 | 01:55 PM
Share
  #5  
longrange4u's Avatar
longrange4u
9 Second Club
iTrader: (2)
 
Joined: Jun 2005
Posts: 2,034
Likes: 0
From: Reston, VA
Default
Uhhhh.... a 76 on an STS? Stock cubes? There is alot more that you would have to do to make a 76 spool on a stock motor rearmount. I wouldnt reccomend it.
Reply
0
Old Nov 23, 2006 | 02:01 PM
Share
  #6  
Jake@EPP's Avatar
Jake@EPP
FormerVendor
 
Joined: Mar 2006
Posts: 1,540
Likes: 0
From: Hell AFB
Default
A 76mm on a 346 will spool, but you talking a high rpm spool depending on exaust AR and also depending on cam and head combo. Idealy you want to limit it to a 67mm for a quick spool with great midrange power.

As longrange4u said, its just a matter of spool time VS top end power,
Front mounted or rear mounted.
Reply
0
Old Nov 23, 2006 | 04:21 PM
Share
  #7  
chuntington101's Avatar
chuntington101
TECH Addict
 
Joined: Aug 2004
Posts: 2,866
Likes: 4
Default
so a 346 has trooble spool but zombies 370 chokes on the turbo? i dont get it. thoguht the samller cubes would reduce choke????

Chris.
Reply
0

Trending Topics

Old Nov 23, 2006 | 09:18 PM
Share
  #8  
longrange4u's Avatar
longrange4u
9 Second Club
iTrader: (2)
 
Joined: Jun 2005
Posts: 2,034
Likes: 0
From: Reston, VA
Default
Zombie's car wasnt choaking on a 76... he was choaking on the .81 AR.... his 370 wasnt enough to spool that 408 the way he had it setup. There are also loooooots of contributing factors when you remote mount. Front mounting has less factors to deal with when it comes to turbo spool. You also have to look at what kind of racing the Zombie does... and what he uses his car for (daily driving). You have to take that all into account. But yea... IMHO a 346 is too small for a 76GTS in the back unless you take into account all the "spool factors" and you address all of them throughly.
Reply
0
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

10 Reasons Daily Driving a Swap Project SUCKS! (& 1 Reason to Do It Anyway)

 Michael S. Palmer
story-1

6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'

 Brett Foote
story-2

Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

 Pouria Savadkouei
story-3

Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

 Verdad Gallardo
story-4

7 Most Reliable High-Performance Engines GM Has Ever Built

 Verdad Gallardo
story-5

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-6

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-7

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-8

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-9

Top 10 Most Powerful Chevy Trucks Ever Made!

 
Old Nov 24, 2006 | 06:50 AM
Share
  #9  
chuntington101's Avatar
chuntington101
TECH Addict
 
Joined: Aug 2004
Posts: 2,866
Likes: 4
Default
so why not just swap out the .81 for the .96???

can you not get a 1.01ar like you can with the GT42s???

Chris.
Reply
0
Old Nov 24, 2006 | 04:17 PM
Share
  #10  
longrange4u's Avatar
longrange4u
9 Second Club
iTrader: (2)
 
Joined: Jun 2005
Posts: 2,034
Likes: 0
From: Reston, VA
Default
That was what Jeremy (Zombie) ended up doing.... went the the .96. Hell the 76GTS is rated at 1000HP I believe. You can also upgrade the 76GTS exhaust wheel and bump that rating to 1100HP.

I have had to address lots of issues with my setup. I am hoping that the 88mm wont be too bad out back.
Reply
0
Tags
Back to Subforum
Forced Induction
View Next Unread
Our LT1 Turbo build...




Advanced Search

All times are GMT -5. The time now is 02:31 AM.

story-0
10 Reasons Daily Driving a Swap Project SUCKS! (& 1 Reason to Do It Anyway)

Slideshow: 10 reasons daily-driving a swap project might not be for you. Or is it?

By Michael S. Palmer | 2026-06-17 09:39:05


VIEW MORE
story-1
6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'

Don't get dad new socks or a grill brush this year.

By Brett Foote | 2026-06-09 14:55:56


VIEW MORE
story-2
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Slideshow: We take a close look at the ONE and Artidiag 800BT2 diagnostic tools from Topdon and the reasons to buy one over the other.

By Pouria Savadkouei | 2026-06-18 10:26:23


VIEW MORE
story-3
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.

By Verdad Gallardo | 2026-05-26 18:23:54


VIEW MORE
story-4
7 Most Reliable High-Performance Engines GM Has Ever Built

Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.

By Verdad Gallardo | 2026-05-21 16:45:27


VIEW MORE
story-5
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-6
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-7
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-8
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-9
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE