A/R size?

Reply Subscribe

Thread Tools

Search this Thread

Nov 22, 2006 | 07:58 PM

bigturboz28

Thread Starter

TECH Apprentice

Joined: Nov 2005

Posts: 304

Likes: 0

From: Newmarket, Ontario

A/R size?

What is the smallest A/R would you recommend on a single front mount T76 for a forged 346?

Nov 22, 2006 | 08:49 PM

smokinHawk

TECH Senior Member

iTrader: (48)

Joined: Jan 2002

Posts: 7,354

Likes: 1

From: Columbus, ohio

.96 is good
though some have done an .81

Nov 22, 2006 | 10:55 PM

longrange4u

9 Second Club

iTrader: (2)

Joined: Jun 2005

Posts: 2,034

Likes: 0

From: Reston, VA

Spool time vs: Top end power

Nov 23, 2006 | 06:59 AM

chuntington101

TECH Addict

Joined: Aug 2004

Posts: 2,866

Likes: 4

would a .81 be better for a stock cubed LS1 with a sts??

Chris.

Nov 23, 2006 | 01:55 PM

longrange4u

9 Second Club

iTrader: (2)

Joined: Jun 2005

Posts: 2,034

Likes: 0

From: Reston, VA

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.

Nov 23, 2006 | 02:01 PM

Jake@EPP

FormerVendor

Joined: Mar 2006

Posts: 1,540

Likes: 0

From: Hell AFB

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.

Nov 23, 2006 | 04:21 PM

chuntington101

TECH Addict

Joined: Aug 2004

Posts: 2,866

Likes: 4

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.

Trending Topics

Never knew about this Trans Am before

9

235
4L80e loosing line pressure

30

910
LT1 camero. Fastest stock NA pony car ever?

1.1k

30.4k
1999 SS 1LE (aka. White Privilege)

31

1.3k
Starting issues

20

642

Nov 23, 2006 | 09:18 PM

longrange4u

9 Second Club

iTrader: (2)

Joined: Jun 2005

Posts: 2,034

Likes: 0

From: Reston, VA

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.

LS1 Tech Stories

The Best V8 Stories One Small Block at Time

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

Verdad Gallardo

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

Pouria Savadkouei

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

Verdad Gallardo

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Pouria Savadkouei

Top 10 Most Powerful Chevy Trucks Ever Made!

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Verdad Gallardo

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Verdad Gallardo

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Verdad Gallardo

10 Camaros You Should Never Buy

10 LS Engine Myths That Refuse to Die

Verdad Gallardo

Nov 24, 2006 | 06:50 AM

chuntington101

TECH Addict

Joined: Aug 2004

Posts: 2,866

Likes: 4

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.

Nov 24, 2006 | 04:17 PM

#10

longrange4u

9 Second Club

iTrader: (2)

Joined: Jun 2005

Posts: 2,034

Likes: 0

From: Reston, VA

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 Subscribe