[DeTomaso] Cam selection
Dave Londry
davel at emspace.com
Sat May 22 01:18:38 EDT 2010
Dan has me in the queue for a run,
but in the meantime I've been running CompCams CamQuest simulator.
I doubt that the absolute numbers are good, but it should be good for
comparison.
Using this for input
==========================================
= 0.030 overbore & stock crank
= 10.8:1 & 94 Octane
= 4V-CC heads, ported, polished and matched, but no port-stuffers.
= flat tappet & hydraulic lifters
= Hall big bores & ANSAs which I intend to core out
= Performer 2665 intake which I plan to replace with an AirGap
= 800cfm Thunder (I also have a 600 Performer but the 800 seemed fine)
= MSD 6AL
============================================
The "best" choice was 275DEH
Dur at 0.050 Dur. Ramp Lift
HP RPM FTP RPM I E I E I E I E Spring#
275DEH 517 5500 468 3700 219 232 275 285 56 53 0.515 0.541 293
It was attractive because of the slow ramp and low spring requirement
Having a wiped lobe and short lifter kind of sensitizes you to those things.
dave
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