Possum Boggs

iTrader: (19)

whcih are better as far as using on a stock motor with a big cam,im looking to purchase a set of heads with 2.02 valves and some mild porting with double valvsprings amd milled,plus i have 170k on the car?

Avaric3

iTrader: (3)

ls6 heads will usually outflow the 5.3 heads on the top end so def the ls6 for a bigger cam

bww3588

iTrader: (49)

I'll play devil's advocate...

Ported with 2.02 valves the 5.3 heads can flow more than your engine will need. Also, 5.3 heads can be had for about 1/4 the price of the ls6 heads.

Stock for stock the ls6 heads are better by far, but if your planning on porting and adding larger valves, I would start with the 5.3's just because of the cost factor.

Possum Boggs

iTrader: (19)

thats what i ws thinking,i had a set of worked 5.3 heads on c camaro ss before they helped alot but i gave 1500$ for the from FFHP im just loookin to spend around a 1000$ or less this time

mark21742

You could slap check out AI's high compression 241 program.....can't remember the price off hand

garygnu

with a big cam in a high mileage 98 motor ,I mite change out the rod bolts for some katech bolts.get some trunnion bearings for the rockers maybe.

96capricemgr

iTrader: (1)

I will play devil's advocate the other way.

If someone did mild port work but then thought bigger valves was important are they really competent enough to be doing this work?

bww3588

iTrader: (49)

I would contact tsp. They sell their cnc 5.3 heads just under 1300 bucks. This includes 2.02 valves, .650 springs locks and retainers. You may be able to supply your own cores and come in at or under 1k.

427LS7HCI

TSP stage 1 LS6

Possum Boggs

iTrader: (19)

just found out my car has 806 heads heads,total junk,looks like im goin with some worked 5.3 heads

andy-lswon

iTrader: (1)

Should've had 241 heads stock. Is go with 243s which are the ls6 heads or 799s which pretty much the same and came on ls2s. 5.3s will flow just as good with some port work. This is massie by the way haha

spicebird98

iTrader: (10)

Check out AI's 5.3 heads, even more budget than 243's and have just as much potential, especially if you up the compression ratio. Dont sleep on them!

bww3588

iTrader: (49)

806's came on 97 and 98's stock. And 243's were on ls6's and Ls2's. 799's came on the 5.3 ho

Possum Boggs

iTrader: (19)

lol i just realized it was you