LB9 head choice
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Car: 1986 Trans AM WS6
Engine: 383 Vortec TPI, PUTS SMILES ON FACE
Transmission: PATC LVL 3 Raptor Transmission
Axle/Gears: 3.27 POSI 9 BOLT
LB9 head choice
how's it going guys I have a quick question maybe some of you might be able to give me a good input I am going to later be switching out my block but will be running a ported polished upper plenum ASM runners Edelbrock base. hey lunati cam(part number for cam is 10120417 k). 1.6 rockers or if I can't have the 1.6 rockers I'll keep the 1.5., and already have hookers 6460 headers Y pipe adjustable fuel pressure regulator all of that good stuff I do have a tune..will be running 24 pound injectors basically I am building all of the upper end and leaving the block for I will later switch it out that is way down the road so for now I want to make my lb 9 lot more peppier my question is what Head should I use that I'm just going to bolt right on.. it will make the car way more enjoyable until I get the new block if anybody can guide me to the right head to use I will take that advice
Thanks all.
Thanks all.
Last edited by happyhapka; 04-02-2015 at 11:00 AM.
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Car: 1986 Trans AM WS6
Engine: 383 Vortec TPI, PUTS SMILES ON FACE
Transmission: PATC LVL 3 Raptor Transmission
Axle/Gears: 3.27 POSI 9 BOLT
Re: LB9 head choice
OK thank you for the reply..and as long as I can just bolt them on.. 1 more quick question... I won't run into any problems with that cam will i
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Car: 89 Firebird
Engine: 355 TBI
Transmission: 700R4
Axle/Gears: 10 Bolt.Posi-3.73s
Re: LB9 head choice
I have to agree that the 081 heads are pretty good for the 305. I would also like to see a comparison with the 059 vortecs. Ive seen some modified 305s make pretty good power with 081s ported with different spring kits etc. Seen em run in the 13s and very street worthy.
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Car: 1983 G20 Chevy
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 14 bolt with 3.07 gears
Re: LB9 head choice
The flow numbers are right there with the 350 heads despite having a 1.84 intake valve and the smaller chamber keeps the compression higher on a 305. The 305 marine engines with their tiny 196/206 @ .050 cams made 250 HP and 302 TQ. They breathe well on a 305 and make great power numbers with modest cams.
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Car: 88 GTA "Cocaine"
Engine: 350 tpi
Transmission: 700r4
Axle/Gears: 3.27
Re: LB9 head choice
I port them out a little and put 1.94 valves in, gasket match and a good set of springs and you are good to go. you don't want to go too big with a tpi setup. I am using a lt4 hotcam with 1.5 rockers and it runs hard. if you don't want the 081 heads take them all apart and send me the bare heads.
shipped to 62966
shipped to 62966
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Car: 90 Formula / T-tops
Engine: 305 TPI
Transmission: MD8
Re: LB9 head choice
Check out this thread : https://www.thirdgen.org/forums/tbi/...-headflow.html
http://www.castheads.com/cylinder-he...evy-305-heads/
http://www.painlessperformance.com/f...rt%20Injection
http://www.hotrod.com/how-to/engine/...-efi-mistakes/
http://www.crankshaftcoalition.com/w...considerations
https://www.thirdgen.org/forums/tpi/...azy-305-a.html
http://www.castheads.com/cylinder-he...evy-305-heads/
http://www.painlessperformance.com/f...rt%20Injection
http://www.hotrod.com/how-to/engine/...-efi-mistakes/
http://www.crankshaftcoalition.com/w...considerations
https://www.thirdgen.org/forums/tpi/...azy-305-a.html
Last edited by LiquidBlue; 06-29-2015 at 06:32 PM.
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