jbigdawg79

iTrader: (5)

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

PowerShift408

iTrader: (44)

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

jbigdawg79

iTrader: (5)

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

blk99sleekbeak

iTrader: (2)

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.

PowerShift408

iTrader: (44)

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.

garygnu

look into a PRC head/cam combo at TSP.

jbigdawg79

iTrader: (5)

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 ?

garygnu

low miles 243s $400, used ls6 intake$325, used after market push rods $80,new comp918 springs $175, new oil pump $100,new connecting rod bolts $120,Patrick-G cam $400,new gasket and bolt kit $275.tune by frost $150.

jbigdawg79

iTrader: (5)

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

peterlawl84

iTrader: (12)

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.

PowerShift408

iTrader: (44)

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.

jbigdawg79

iTrader: (5)

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

evil chevy

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

peterlawl84

iTrader: (12)

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.

garygnu

the corvette ls forums will have low mileage 243s for sale.if you can get 317 and mill them for the some price great.