Push Rod length with Fast Burn heads?
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Joined: Jul 2002
Posts: 1,948
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From: Chicago
Car: 1989 Camaro IROC-Z
Engine: L98 350 TPI
Transmission: Built TH-700 R4 (Vilgilante 2800)
Axle/Gears: 9 bolt w/ PBR's
Push Rod length with Fast Burn heads?
I am putting Gm Fast Burn heads on my L98 with COMP Cams 08-503-8 (CS XR276HR-12). http://store.summitracing.com/partde...8&autoview=sku This will be with 1.5 Full Roller rockers.
I am wondring if I can run stock or stock length push rods or do I need to go longer and if so how much longer?
Thanks
Kevin
I am wondring if I can run stock or stock length push rods or do I need to go longer and if so how much longer?
Thanks
Kevin
Joined: Mar 2000
Posts: 43,187
Likes: 45
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Should be stock for roller lifters.
Always best to check geometry during assembly, of course.
Always best to check geometry during assembly, of course.
On Probation
Joined: Oct 2008
Posts: 6,319
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From: Northern Utah
Car: seeking '90.5-'92 'bird hardtop
Engine: several
Transmission: none
Axle/Gears: none
Re: Push Rod length with Fast Burn heads?
Guys, stop, sell the crappy Fast-Burn heads. Why suffer a 210cc intake port, with the matching loss of flow velocity ( which is the whole point of TPI ) that can't even flow as well as a stock 170cc Vortec truck head, despite the larger valves?
even the TFS 175 heads are a better choice. You will notice a loss of low-rpm torque, and your top end power will be disappointing.
even the TFS 175 heads are a better choice. You will notice a loss of low-rpm torque, and your top end power will be disappointing.
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Joined: Sep 2008
Posts: 61
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Re: Push Rod length with Fast Burn heads?
Guys, stop, sell the crappy Fast-Burn heads. Why suffer a 210cc intake port, with the matching loss of flow velocity ( which is the whole point of TPI ) that can't even flow as well as a stock 170cc Vortec truck head, despite the larger valves?
even the TFS 175 heads are a better choice. You will notice a loss of low-rpm torque, and your top end power will be disappointing.
even the TFS 175 heads are a better choice. You will notice a loss of low-rpm torque, and your top end power will be disappointing.
http://www.carcraft.com/techarticles...450/index.html
Here is my TPI
you tube video
http://www.youtube.com/watch?v=UsCCTqoYu14
soon to be replaced with this Vortec version
Last edited by ch@0s; Aug 2, 2010 at 01:21 PM.
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