TFS vs AFR heads?
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From: pa
Car: 87 IROC
Engine: 350
Transmission: auto
Axle/Gears: 3.23
TFS vs AFR heads?
Sorry if I'm beating a dead horse... As much as I'd like to buy some shiny new 1040's, I got way too many irons in the fire this year. Any hotroding i do will kinda be on a budget. Found a set of used 190 TFS heads for possibly less than a grand. Will they suffice to get my L98 IROC into the mid 12's on the motor? Not worried about the possible difference of a tenth or 2 compared to a set of AFR's, so I'm thinking i should grab them. Thoughts? Experiences? Thanks
Joined: Sep 2003
Posts: 25,895
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From: Pittsburgh PA
Car: 89 Iroc-z
Engine: 555 BBC Turbo
Transmission: TH400
Axle/Gears: MWC 9” 3.00
Re: TFS vs AFR heads?
With right intake and cam, you can get 12's easily... chassis setup is more important and getting vehicle weight down.
Sure they arent 195's? Or are they the old twisted wedge
Sure they arent 195's? Or are they the old twisted wedge
Joined: Sep 2003
Posts: 25,895
Likes: 429
From: Pittsburgh PA
Car: 89 Iroc-z
Engine: 555 BBC Turbo
Transmission: TH400
Axle/Gears: MWC 9” 3.00
Re: TFS vs AFR heads?
My concern with them is valvetrain geometry. I havent seen them but read trickflow altered the valve angles and it lead to geometry issues so you gotta setup your rockers carefully, but that goes with anything
Joined: Sep 2003
Posts: 25,895
Likes: 429
From: Pittsburgh PA
Car: 89 Iroc-z
Engine: 555 BBC Turbo
Transmission: TH400
Axle/Gears: MWC 9” 3.00
Joined: Oct 2001
Posts: 12,213
Likes: 1,140
From: Il
Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: TFS vs AFR heads?
Think TFS needed a certain rocker? I used old comp mag rockers, never had an issue. Still have the heads but not on a motor.
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Member
iTrader: (4)
Joined: Jul 2004
Posts: 472
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From: pa
Car: 87 IROC
Engine: 350
Transmission: auto
Axle/Gears: 3.23
Re: TFS vs AFR heads?
Huh, now that you guys mention it, I seem to recall something about the rocker arm thing. I'll shoot the guy selling them a message and find out. Glad I asked.
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From: *member since 1999, I think - just can't remember my old name, and the big site crash...*
Car: 89 GTA ASC Conv., Prev: 89 GTA 6.3L
Engine: 5.7L L98 TPI
Transmission: 700r4 Automatic
Axle/Gears: 3.27:1 w/ JG1 Options:B2L, N10, U1A
Re: TFS vs AFR heads?
When I researched, I ended up w AFR. V TFS twisted wedge. But that was 25 years ago... maybe something changed?
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