L98 Rebuild - Head Options
07-13-2013, 09:06 PM
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L98 Rebuild - Head Options
Ok, I am rebuilding a 90 L98 but need some answers on heads. My end result is to only be in the 350HP range but the bottom end is being built forged with I beam Rods so that if I want to get crazy and up the HP via forced induction or NOS I can without another rebuild later.
I have a couple of options and have read a ton of threads that all kind of go in circles.
Option 1 is to send my stock heads off to Lingerfelter and have them CNC ported and hand sanded for about $1700.
Option 2 is to go the AFR 195 route for about the same money.
AFR looks like the best overall choice but I am more concerned with final fitment and headers than power. I am considering the Hooker Super Competition or TPIS headers for my two options but am concerned with firment since the Exh ports are higher on the AFR heads.
Suggestions? Gotchas? Words of wisdom?
I am also looking at a Comp Cam Camshaft 218/224 .570/.560 LSA113
and need valve spring information as well. If I go with double springs and wind up selecting a lower lift cam in the end is there any adverse effect? Again I am thinking future without wanting to rework a bunch of stuff so double springs are a requirment unless they will have issues on a smaller cam. I am also looking at some Lingerfelter cams and the TPIS cams as other options for this combo.
I have a couple of options and have read a ton of threads that all kind of go in circles.
Option 1 is to send my stock heads off to Lingerfelter and have them CNC ported and hand sanded for about $1700.
Option 2 is to go the AFR 195 route for about the same money.
AFR looks like the best overall choice but I am more concerned with final fitment and headers than power. I am considering the Hooker Super Competition or TPIS headers for my two options but am concerned with firment since the Exh ports are higher on the AFR heads.
Suggestions? Gotchas? Words of wisdom?
I am also looking at a Comp Cam Camshaft 218/224 .570/.560 LSA113
and need valve spring information as well. If I go with double springs and wind up selecting a lower lift cam in the end is there any adverse effect? Again I am thinking future without wanting to rework a bunch of stuff so double springs are a requirment unless they will have issues on a smaller cam. I am also looking at some Lingerfelter cams and the TPIS cams as other options for this combo.
07-13-2013, 09:14 PM
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St. Jude Donor '05
Long tube runner setup?An AFR 180 will get you 350hp no problem for plenty less than 1700. Dont underestimate this on a 350 just dont see the need for a 195cc head with a small cam.
If youre changing intakes later on a 195 comp head would be the ticket for real good hp on a 350. Capable of well over 500hp with a solid roller
If youre changing intakes later on a 195 comp head would be the ticket for real good hp on a 350. Capable of well over 500hp with a solid roller
07-13-2013, 10:02 PM
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Sorry. I am going to go with the FIRST TPI setup for top end flow. I plan on limiting RPM and Top Speed via the tune as this car is actually for a 16 yr old. He is only 13 now so we have lots of time to work on it.
When I say 350HP to me that is the limti of what he will ever feel int his car. It might see 500 before he comes of age. MY DD is a 6000 lb Harley F150 pushing 650 at the wheels and I am looking for a peppy 3100 lb car to see plenty of power but also be able to limit the power as the kids gains experience and confidence.
I think the AFR 1041 is the correct 195cc head and it is about 1500 new. It has a square exhaust port while I think the vette is D shaped - will this be an issue with either header?
When I say 350HP to me that is the limti of what he will ever feel int his car. It might see 500 before he comes of age. MY DD is a 6000 lb Harley F150 pushing 650 at the wheels and I am looking for a peppy 3100 lb car to see plenty of power but also be able to limit the power as the kids gains experience and confidence.
I think the AFR 1041 is the correct 195cc head and it is about 1500 new. It has a square exhaust port while I think the vette is D shaped - will this be an issue with either header?
07-13-2013, 10:12 PM
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St. Jude Donor '05
Shape doesnt matter long as it covers the port
My headers are noticeably larger than the port: gasket seals all is good.
Get ahold of tpi421vette for your head purchase youll be glad you did!
My headers are noticeably larger than the port: gasket seals all is good.
Get ahold of tpi421vette for your head purchase youll be glad you did!
07-13-2013, 10:18 PM
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worth every cent. And it gives room for future changes. And I had no clearance problems with LT Headers.