help with heads

Reply Subscribe

Thread Tools

Search this Thread

May 5, 2010 | 03:11 AM

jbigdawg79

Thread Starter

Staging Lane

iTrader: (5)

Joined: Feb 2010

Posts: 84

Likes: 0

help with heads

ok guys im looking to buy some heads but what am i looking for ?i have a 98 t/a and i wanna get some heads and a cam but i see so many heads i dont know what i am looking for 806's,317's,243's,l92s im really confused guys

any help would be appreciated.and what springs do i want ? and what is milled and worked lol i feel really stupid but any help is really appreciated i have an automatic if that matters at all thanks

May 5, 2010 | 03:39 AM

PowerShift408

TECH Fanatic

iTrader: (44)

Joined: Jan 2006

Posts: 1,741

Likes: 1

From: Bowling Green, KY

Stole this info from another thread, everything looks accurate to me. Now the real question is what goals do you have in mind for your car (dyno numbers, ETs). What mods are already done to your car? Tell me that and I can point you in the right direction.

Casting Number 806 or 933
LS1 (Perimeter Bolt)
97-98 5.7L Passenger Car and Corvette
Material: Aluminum
Combustion Chamber Volume: 66.67cc
Intake Port Volume: 200cc
Exhaust Port Volume: 70cc
Intake Valve Diameter: 2.00 inches
Exhaust Valve Diameter: 1.55 inches

Casting Number 853 or 241
LS1 (Center Bolt)
99-00 5.7L Passenger Car and Corvette (853)
01+ 5.7L Passenger Car and Corvette (241)
Material: Aluminum
Combustion Chamber Volume: 66.67cc
Intake Port Volume: 200cc
Exhaust Port Volume: 70cc
Intake Valve Diameter: 2.00 inches
Exhaust Valve Diameter: 1.55 inches

Casting Number 243
LS6
01+ 5.7L Corvette
Material: Aluminum
Combustion Chamber Volume: 64.45cc
Intake Port Volume: 210cc
Exhaust Port Volume: 75cc
Intake Valve Diameter: 2.00 inches
Exhaust Valve Diameter: 1.55 inches

Casting Number 706
LM4 / LM7
99+ 5.3L Truck
Material: Aluminum
Combustion Chamber Volume: 61.15cc
Intake Port Volume: 200cc
Exhaust Port Volume: 70cc
Intake Valve Diameter: 1.89 inches
Exhaust Valve Diameter: 1.55 inches

Casting Number 852
LR4
99+ 4.8L Truck
Material: Aluminum
Combustion Chamber Volume: 61.15cc
Intake Port Volume: 200cc
Exhaust Port Volume: 70cc
Intake Valve Diameter: 1.89 inches
Exhaust Valve Diameter: 1.55 inches

Casting Number 317 or 035
LQ9
01+ 6.0L Truck
Material: Aluminum
Combustion Chamber Volume: 71.06cc
Intake Port Volume: 210cc
Exhaust Port Volume: 75cc
Intake Valve Diameter: 2.00 inches
Exhaust Valve Diameter: 1.55 inches

May 5, 2010 | 04:18 AM

jbigdawg79

Thread Starter

Staging Lane

iTrader: (5)

Joined: Feb 2010

Posts: 84

Likes: 0

heads

i have a fast 90 intake and t/b , long tubes ory,42#injectors and granatelli maf [i am going to get that all installed next week]. 373 rear looking to add heads and a cam and a 3200 stall trying to end up with 430-450 rwhp

May 5, 2010 | 04:22 AM

blk99sleekbeak

TECH Apprentice

iTrader: (2)

Joined: Jul 2008

Posts: 349

Likes: 2

From: middle tn

No l92's for you if you still on the ls1. I would suggest some ported 5.3's or 243's from PRC for a good budget head. Also you need to find out which heads and cam you are going to run and get a convertor based off that.

May 5, 2010 | 04:40 AM

PowerShift408

TECH Fanatic

iTrader: (44)

Joined: Jan 2006

Posts: 1,741

Likes: 1

From: Bowling Green, KY

Quote:

Originally Posted by jbigdawg79

Easiest way would be PRC stage 2.5 5.3 heads and a cam with at least 228 degrees of duration and around .590" of lift. TSP 228 and torquer2 come to mind.

I'd probably go 3600 with the stall speed as well.

May 5, 2010 | 09:25 AM

garygnu

TECH Senior Member

Joined: Feb 2009

Posts: 5,445

Likes: 4

look into a PRC head/cam combo at TSP.

May 5, 2010 | 06:15 PM

jbigdawg79

Thread Starter

Staging Lane

iTrader: (5)

Joined: Feb 2010

Posts: 84

Likes: 0

well ya if i had 2500 to spend on this combo i would love to go to texas speed but i am on a tight budget and am trying to piece together this combo from the classified section lol .with the heads and cam what else needs to be replaced push rods ,oil pump,?So basically im looking for ported 243's or 317s, now would it be worth it for me if they are stock 317s with good valves and springs ?

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

Brett Foote

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

Pouria Savadkouei

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

Verdad Gallardo

7 Most Reliable High-Performance Engines GM Has Ever Built

Verdad Gallardo

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

May 5, 2010 | 09:15 PM

jbigdawg79

Thread Starter

Staging Lane

iTrader: (5)

Joined: Feb 2010

Posts: 84

Likes: 0

Lol know anyone with this stuff and I already have a fast 90 so are 317s good too ? I see alot of them in the classifieds

May 5, 2010 | 10:38 PM

#10

peterlawl84

TECH Resident

iTrader: (12)

Joined: Jul 2003

Posts: 871

Likes: 4

From: Kansas

I just picked up a set of Patriot CNC'd 243 heads with a 228/232 cam from the classifieds here, also got springs and pushrods and upgraded to ported LS6 oil pump and Ls2 chain while I was in there.
I already had LS6 intake, granitelli MAF, kooks LT, catted y, borla. And its an A4.
It made 392rwhp on load bearing dyno and I have 20x10 rear wheels, I was told it would be ~8-10% more (~430ish) on a dynojet and the wheels cost me some hp as well.
The graph is pretty flat for both hp and torque and the car pulls pretty good.
With the fast 90/90...you should easily be in your hp goals.

May 5, 2010 | 11:25 PM

#11

PowerShift408

TECH Fanatic

iTrader: (44)

Joined: Jan 2006

Posts: 1,741

Likes: 1

From: Bowling Green, KY

Quote:

Originally Posted by jbigdawg79

Lol know anyone with this stuff and I already have a fast 90 so are 317s good too ? I see alot of them in the classifieds

317s are good heads for boost. The will need too be milled significantly to make good power on your setup because they have 72cc combustion chambers which would drop your compression ratio about 1 full point.

May 6, 2010 | 03:21 AM

#12

jbigdawg79

Thread Starter

Staging Lane

iTrader: (5)

Joined: Feb 2010

Posts: 84

Likes: 0

Cool that's what I needed to know so what did all that run you Peter ??

May 6, 2010 | 04:45 AM

#13

evil chevy

Teching In

Joined: Aug 2009

Posts: 17

Likes: 0

From: bahrain

mmm
lot if cam shaft and a lot of heads some of thim works and some no

get ms4 cam shaft with the 650left spring and the and after market pushrod and lppk for 243s and full arp polts and stud kit
and order 3000 t/c
its well works

May 6, 2010 | 06:54 PM

#14

peterlawl84

TECH Resident

iTrader: (12)

Joined: Jul 2003

Posts: 871

Likes: 4

From: Kansas

The H&C, springs and pushrods for $1050.
Ported LS6 oil pump, LS2 timing chain, gaskets, and bolts ~$380.
Dyno tune $450.

Here's a pic of the wheels and the dyno graph too. Like I said, I know my rear wheels are heavy and the shop said it would easily be 400+ on the load-bearing dyno if I had 17-18" wheels.