9ff 1300hp 996
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Your pretty good memory Joe. 
We were going to do one ourselves and we found out EVO did one. We bought this one from EVO about three years ago.
We found out air flows below 280 cfm lost power. Once we combined the 360 cfm heads with the custom cams, larger turbo's and displacement which could stay up with the heads ......... the manifold came into it's own. It was a lot like using header ID's that were too big for the motor.
We were going to do one ourselves and we found out EVO did one. We bought this one from EVO about three years ago. We found out air flows below 280 cfm lost power. Once we combined the 360 cfm heads with the custom cams, larger turbo's and displacement which could stay up with the heads ......... the manifold came into it's own. It was a lot like using header ID's that were too big for the motor.
I am sure you have the rpms and overall flow capabilities to make it work.
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As we raised the stroke, which we have done three times now (78.4, 80.4. 81.4 and now 82.4), we have had to lower the redline. Our redline with the current bore and stroke is 7600 rpm's. The crank will increase displacement by .3 liters. The pistons by .4 liters. It will actually be a 4.38L motor.
Performance Developments and S Car Go Racing in conjunction with Protomotive designed the heads, cams, displacement and turbo's to be balanced. An increase in anything would require a complete redesign. The airflow of all parts are in harmony.
Last edited by cjv; Feb 2, 2009 at 10:30 PM.
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