Target quench?

Reply Subscribe

Thread Tools

Search this Thread

Dec 5, 2013 | 10:31 PM

lbfd48

Thread Starter

Teching In

Joined: Jun 2008

Posts: 46

Likes: 0

From: Mississippi

Target quench?

What should my target quench be?? What I have is an lq4 pistons .010 out the hole, .015 milled 243s. I also have a set of .040 cometic gaskets. This is an n/a motor that will be sprayed every now and then.
Thanks

Dec 6, 2013 | 12:53 AM

82cetuner

10 Second Club

iTrader: (9)

Joined: Sep 2009

Posts: 1,368

Likes: 7

From: Denham Springs, LA

stock bottem end I belive .60 is good, you always want to go as close as possible, however since you are not running forged internals things will stretch and move a little more i say you are good

Dec 6, 2013 | 12:54 AM

82cetuner

10 Second Club

iTrader: (9)

Joined: Sep 2009

Posts: 1,368

Likes: 7

From: Denham Springs, LA

and the engine will like the closer than stock quench for n20, will help the burn and the n20 likes compression

Dec 6, 2013 | 12:56 AM

82cetuner

10 Second Club

iTrader: (9)

Joined: Sep 2009

Posts: 1,368

Likes: 7

From: Denham Springs, LA

im running flat top pistons with .040 gasket, .030 milled heads at 12 to 1 compression and she runs good on 93

Dec 6, 2013 | 01:04 AM

luigiandme

Launching!

iTrader: (2)

Joined: Jun 2008

Posts: 288

Likes: 1

INCREASE YOUR QUENCH!

Thats putting you at 0.030 quench. 0.035 is the rule of thumb.

btw, milling has ZERO effect on quench. It's all about head gasket thickness and out of hole.

Dec 6, 2013 | 09:00 AM

lbfd48

Thread Starter

Teching In

Joined: Jun 2008

Posts: 46

Likes: 0

From: Mississippi

Thanks, I was thinking .030 quench was not enough just couldn't seem to find the info anywhere.

Dec 6, 2013 | 12:38 PM

1989GTA

TECH Junkie

Joined: Dec 2005

Posts: 3,092

Likes: 11

When I have built motors I shoot for somewhere between .035" and .040". I try to by the componets/machining that will fall into that range.

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

Dec 6, 2013 | 01:38 PM

Brian Tooley Racing

FormerVendor

iTrader: (13)

Joined: Oct 2002

Posts: 1,943

Likes: 7

From: Bardstown, KY

I've seen pistons hit at .030" quench on iron block engines.

Iron blocks don't expand as much as an aluminum block will.

Dec 6, 2013 | 02:21 PM

#10

Sales2@Texas-speed

LS1Tech Premium Sponsor

iTrader: (5)

Joined: Jan 2008

Posts: 5,053

Likes: 7

From: Texas!

The minimum quench we recommend is .035". Anything less then that and you are running a risk of some contact issues.

__________________

Largest Stocking Distributor of LS-x Engines / CHECK OUT OUR NEW WEBSITE!

COMP - FAST - PACESETTER - DIAMOND RACING - EAGLE SPECIALTY PRODUCTS - CALLIES - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - KOOK'S HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - AND MORE!

Dec 14, 2013 | 05:31 AM

#11

IllusionalTA

10 Second Club

iTrader: (9)

Joined: Jan 2003

Posts: 1,271

Likes: 1

From: NY

Ran .040 on my lq9 with zero smacking of anything.. But every motors diff..

Dec 14, 2013 | 08:22 AM

#12

WKMCD

TECH Junkie

iTrader: (2)

Joined: Mar 2005

Posts: 3,416

Likes: 2

From: Northern VA

.035 to .040 is close enough to help avoid detonation so you can run a little more timing. I wouldn't go below .035 but that's just me.

Just my $.02

Dec 14, 2013 | 09:02 AM

#13

KCS

Moderator

iTrader: (20)

Joined: Mar 2005

Posts: 8,859

Likes: 323

From: Conroe, TX

Run a stock MLS and call it done.

Dec 14, 2013 | 09:06 AM

#14

WKMCD

TECH Junkie

iTrader: (2)

Joined: Mar 2005

Posts: 3,416

Likes: 2

From: Northern VA

Quote:

Originally Posted by KCS

Run a stock MLS and call it done.

Agreed. A lot cheaper also.

Dec 14, 2013 | 11:17 AM

#15

A.R. Shale Targa

11 Second Club

iTrader: (2)

Joined: Feb 2011

Posts: 3,729

Likes: 15

From: Fredonia,WI

Quote:

Originally Posted by WKMCD

.035 to .040 is close enough to help avoid detonation so you can run a little more timing. I wouldn't go below .035 but that's just me.

EXACTLY !!!!!
It always scares me when I see .040 cometics on a stock LS1 short block.
If the pistons are .006"-.008" OOTH then the quench is brutally tight/close.
Perhaps as Brian just stated the aluminum block helps this but I recently tore
down an aluminum headed iron block stock car engine that had the pistons
.018" out with a .051" gasket and you could see the marks from the pistons
touching the quench pad of the chamber. This was only a 7000 rpm...maybe
525 horsepower application. Luckily it didn't bomb or even pinch the lands
but I am ordering .056" Cometics for it.

Dec 14, 2013 | 06:43 PM

#16

maroonls1z

TECH Resident

Joined: Aug 2005

Posts: 980

Likes: 2

Not to hijack this thread but is 0.051 quench too much? I have a zero decked ls7, I'd like to run 0.041 head gaskets but I'm afraid that will raise my DCR too high since it has a torquer cam.

Reply Subscribe

Target quench?

Target quench?

Trending Topics

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

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

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

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Top 10 Most Powerful Chevy Trucks Ever Made!

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

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

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

10 Camaros You Should Never Buy

10 LS Engine Myths That Refuse to Die