Cam shaft information

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Mar 9, 2012 | 08:00 PM

#16

n2oiroc

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From: milwaukee, wi

12.22mm lift on the bf272's? nice!

Mar 10, 2012 | 03:34 AM

#17

GG06MR

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From: SATown

Quote:

Originally Posted by David Buschur

GSC JUN 272 Copy:
Intake Net Valve Lift: .42002
intake duration @ .050 lobe lift: 208.6
Intake duration @ .100 lobe lift: 174.5
Intake lobe area: 19.08

Exhaust Net Valve Lift: .41950
Exhaust duration @ .050 lobe lift: 201.7
Exhaust duration @ .100 lobe lift: 168.7
Exhaust lobe area: 18.99

Notes: Had some lobe base circle issues

GSC, Base circle runout but within acceptable limit, General above average quality. Run with a quality valve spring kit. Could have spent a little bit more time on the finish grind

Summary:

GSC, very consistently average quality.

I'm very curious which version of GSC S2's were tested? Was this one of the older and smaller versions, and possibly a set of the cams that came from the batch(es) with breakage issues, or the current 274's? Either way, it would be interesting to see him compare the quality of the older vs. newer GSC's to see if the quality improved with the reliability/durability.

Mar 12, 2012 | 08:30 AM

#18

R/TErnie

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From: WAR EAGLE!

I'd like to hear back from Quinn,
Dave do you have his contact information?

I don't have a drawing to illustrate my point, but a more exaggerated/easily identifiable contrast would be how the contact point on the bucket changes on a shim under bucket type valve train (Subaru- Toyota)... the same is done for the Type2 Finger Follower setup that the Neon, SRT4, and Evo have.