Back to the cam, I have no reason to question DOC's call on the cam. He has made his little "destroked" 302 @3,000pds run in the .40's using his knowledge and computer.....he can tune my little motor anytime Dan, with everything DOC has told me and everything he is doing to the motor, he is under the assumption that I should be at the same e.t. as before....maybe a little more I am looking forward to getting back in it and hammering it
cam selection Hi guy's, the cam is a little bit less duration and lift then what was in it to start. Also with the smaller cam we ended up not having to flycut the pistons saving time, money and compression. Overall I was looking at the torque area under the curve from 4500 to 6500 rpm. With a larger, i.e. more duration and lift, you can make more peak tq and hp but #1 you keep moving the curve to the right, meaning more and more rpm and #2 you lose an equal or larger amount of tq/hp in the lower rpm range. John has a stock block with a stroker crank. I wouldn't really want to turn it more than 7000 rpm, then you get into reliability issues, e.g. picking main caps up off the starting line, which I have done before and it is not fun. So going with the smaller cam will give more tq at 5000 and less at 7000. He has a 4500 stall converter and should shift at 6800 keeping the motor from 4500 - 6500 most of the track. When designing a power curve you have to remember to get the most out of the "area under the curve" When a car is accelerating from start to finish you will only see peak tq/hp a couple of times (depends on how many gears you have), so if you can improve on the whole range your et's will improve more than just peak. I don't know if John's car will be faster but it shouldn't be any slower and it should last a long time. Ashton
Agreed...reliability issues come first...it's nice to be able to hop in and hammer it and have no fear of something breaking on you. I'd imagine with the C-4 John will be in second gear at the traps and at the peak of the curve. Ashton when your done with Johns motor you can come to Charleston and tune my chassis ...I'm sure I can't pay as well as John but the scenery is pretty good.
