I'm just wondering if they are. Because I want to try to get my 305 into the mid 14's and am wondering if I wanted to swap to TPI later are the heads the same as the LB9?

Or should I keep the TBI and see if I can get thet sucka to run 14's?

Then once I get the car into the 14's I'm going to put it on the bottle to run 13's.

------------------
L98 w/ ATI ProCharger P600B 9psi, 2 core intercooler. (New L98 coming soon)
Pro-Built Stage 3 700-R4 w/ Continental 2400 stall TC
C5 wheels and tires.

92 Firebird Convertible- L03, 700-R4
Bone Stock
Me, my car and I
"Speed kills but it makes me feel alive" - White Zombie
Crazy street-racing idiot member of the All-Powerful Nor-Cal crew.

 

they are not the same. TPI heads are better. get some and polish and port some a bit.

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-Tas
'89 Formula WS-6
[soon to be Torch Red with black hood and headlights =) ]

305, TBI, auto, 14x3 chrome flat based open element with K&N, Milodon 160* thermo, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips....

Super GRK_Taz World
EFI & Intake Options
AOL IM: superGRtaz | ICQ 82881207

 

Tell me this Tas, Would I benifit or lose out if I put my L98 heads on my L03? I know that doing that might lower my compression because of the differance in combustion chamber sizes but how much do you think? Or should I keep the stock heads and just work on intake and exhaust?

 

hey if Lb9 heads are so much better how come when a TPI injection system was put on a L03 the numbers where identical to the factory Lb9 numbers? The lb9 heads couldnt be all the much better fi the injection system is what made the HP difference between l03 and lb9.

BTW u will lose a considerable amount of compression with 350 heads. Have them milled and not only will u regain ur OEM compression u could probably increase compression resulting in more hp.

------------------
1989 pontiac firebird
bright red exterior(just repainted)
grey interior
5 spd
305 TBI (stock)
WS.6 formula wheels
3.73 posi rear end
http://members.aol.com/j007golden/Mikey89.html
-------------------------
1985 trans am
factory bright yellow
4 wheel disks
16 inch wheels
305 TPI
power antenna and mirrors
t tops

 

L98 heads will make you loose too much compression. stick with 305 TPI ones if you wana be a budget racer.

 

Yeah thats what I thought. I dont want to dump alot of money into the 305 though when someday I know I'll put a 350 in it. Maybe I'll just get the stock heads pocket ported.

[This message has been edited by Trevor 91 Formula (edited February 18, 2001).]

 

um no. stock heads are worthless. Shell out the $70 on some low mile 305 TPI heads and port and polish those.