new TFS 205 heads
04-26-2009, 09:23 PM
#41
I spoke with TFS, they said the valves are moved, so longer PR's are needed, and even with the powdered metal guides, they still need to have the roller rockers, the new guides are to improve their service life on the street, not to be able to run stock rockers
04-29-2009, 10:27 AM
#47
What I think people forget about is GM rockers do fail, and do have all the needle bearings fall out. Given with the cam profiles and valve train geometry, I can upgrade the rockers and get a kick *** head that virtually guarrentees 450 rwhp on a m6 car all day with a cam that is at least 22x/230+ Not bad.
04-29-2009, 11:09 AM
#49
On The Tree
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anybody know if the estimated ship date of 5/8 is real?
http://store.summitracing.com/partde...5&autoview=sku
http://store.summitracing.com/partde...5&autoview=sku
Did anyone else notice this:
$1,995.95
Quantity: Sold individually.
Someone tell me that's a typo because unless they're guaranteeing 700 rwhp they can keep their $4,000 heads.
04-29-2009, 11:11 AM
#50
Launching!
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Ok, guys, playing around with pianoprodigy's VE calculator, I get the following numbers with the cam in my sig and stock thickness gasket (.052).
Are these numbers safe on 91 octane at 4000+ feet elevation?
Static Compression Ratio 11.58 :1
Dynamic Compresion Ratio 8.77 :1
Are these numbers safe on 91 octane at 4000+ feet elevation?
Static Compression Ratio 11.58 :1
Dynamic Compresion Ratio 8.77 :1
05-04-2009, 10:15 PM
#51
Launching!
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05-05-2009, 06:30 AM
#52
Cylinder Heads, GenX (TM) Street/Strip CNC, Aluminum, Assembled,58cc Chamber,205cc Intake Runner,Chevy,LS,Pair
05-13-2009, 09:35 AM
#54
In stock ready to ship!!
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Click Above for Product Information
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05-13-2009, 12:21 PM
#56
It's not as rare as you think, especially on early LS motors. Early rockers, say 97-2000 (at least) it happened often enough to be a concern. I put some later style rockers, from a 2003 Tahoe, and they look much sturdier and better designed. Since the upgraded rockers came out, it is indeed pretty rare, but that may not even apply to Fbods at all. It DOES happen so don't be surprised if your higher lift cam stresses your rockers to failure or chews up valve guides sooner than you'd like.
