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911st 911st is offline
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Join Date: Jan 2004
Location: Sacramento
Posts: 7,269
Note on the turbos. If you stay with 3.0 you are 10% smaller. A 7200 on a well set up CIS is going to get full boost by close to 3100rpm. This would put you at about 3400 if you were CIS but probably sooner with the EFI effect. A 7006 on a well set up 3.3 CIS will see full boost by about 3300-3600 so figure about 3500 with EFI. I belive that on a race motor you want full boost about 3500 to 3800 to minimize back pressure. This might be good for another 30HP.

Both will have fast spool times. (Boost threshold, spool time, full boost time, all are different. Spool time is the 600 rpm or so it takes the turbo to go from boost threshold to full boost.)

You might want to talk to "Cam Grinder". There are more modern cams out there. However, you can time an SC/Carrera cam to make HP to 7K I believe. Just copy the 1977 euro 3.0 spec. Most set there SC cams for low end to make up for the CIS's lack of responsiveness.

Not an expert, just what I believe so far.

Check out Bell Inter-coolers (BIC) for a water to air IC.
Old 10-23-2009, 09:54 AM
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