Forced Induction Supercharger/Turbocharger

valve springs to use with TFS heads and 10psi from turbo?

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Old Feb 5, 2007 | 08:34 PM
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TransAm396's Avatar
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valve springs to use with TFS heads and 10psi from turbo?

What should I go with? Im using the stock lifers with 30k on them, and the cam will have no more than a .550 lift.

Comp 987s? Or would they be too hard on my lifters? Ill only be making 10psi..12 at most and spinning the car to 6200 max.(shiftlite on at 6k)
Old Feb 6, 2007 | 07:36 AM
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Not sure if those springs will be beefy enough. I ran those with XE230/236 and power fell off pretty quick after 6000rpm. Notsure if that is just the nature of that cam or if it was the springs.
Old Feb 6, 2007 | 09:18 AM
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LE set me up for the big Comp Beehives (921's I think???) on my TFS heads for the 383 with the D-1SC.
Old Feb 6, 2007 | 09:30 AM
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Ill be spinning it to about 6, 6200 max
Old Feb 6, 2007 | 09:36 AM
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I bought my TFS heads already set up with Crane 99893 springs, Ti retainers and 10* locks to run with a CC305 and a turbo. I have no real life info on how they'll run yet, but I should know soon.

(I'm a bit worried about the seat pressure and 15+ psi boost.)
Old Feb 6, 2007 | 10:04 AM
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Originally Posted by Roadie
I bought my TFS heads already set up with Crane 99893 springs, Ti retainers and 10* locks to run with a CC305 and a turbo. I have no real life info on how they'll run yet, but I should know soon.

(I'm a bit worried about the seat pressure and 15+ psi boost.)
Hurry up already
Old Feb 6, 2007 | 12:15 PM
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TransAm396's Avatar
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well will the 987s be ok for 10-12psi and stock lifters?
Old Feb 6, 2007 | 07:39 PM
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Do you still have the springs I sold you with thoses heads? They would work perfect. .600" lift, 145# on the seat and 350# open. That is what they were set up for 10-12# of boost.......John
Old Feb 6, 2007 | 09:00 PM
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figures..lol..what were the part number on all the stuff?
Old Feb 7, 2007 | 05:54 PM
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They were the crane springs 10308-1 with comp seats. If you want, Email Lloyd and see if he remembers what they were installed at. Good Luck......
Old Feb 7, 2007 | 10:11 PM
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they are ok with stock low mileage lifters?
Old Feb 8, 2007 | 06:47 PM
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Yes, that was what I was going to run......
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