DonRoc

[email protected]
Send me a few @ the dyno sheet I will post them for you. I am interested in the dyno sheet to compare. What exhaust do you have on the dyno? Also if you could include the boost numbers at rpm and your pulley sizes that would be great. Thanks

CNC

Tomorrow when I have final info I will scan and send.

Stelling dry

8" and 4.750"

Ben is anal about using everything as it will be in the boat.

CNC

This is from my old motor 572 w/dart iron eagle heads, bigger cam same procharger same pulleys 13lbs boost...in 2005
http://www.offshoreonly.com/forums/a...do-dyno1r2.jpg

http://www.offshoreonly.com/forums/a...o-dyno-2r2.jpg

hope this comes thru....

CNC

here's the whole thread....

http://www.offshoreonly.com/forums/g...mpressive.html

DonRoc

Thanks I will take a look at it.

CNC

In my old motor I had Crane 651

New motor:
CompCams billet core hyd. Roller
296/306 adv. 240/[email protected]" .612"/.612" w/1.7:1 Rocker 114 degree lobe sep.

DonRoc

Smaller cam, smaller heads, less boost more power???
I cant imagine the M4 is using that much less power than my M5. I have the dyno set as it would be in the boat. everything is on it, pwr steeering, water pump, alt.
I really wonder if my headers are the restriction I have the E-tops. I might see if I can get a larger set for the dyno just to compare.

Philm

could be TOO much cam Don. Going too big can often be as bad or worse on power as going too small. Screws up intake and exhaust velocities.

DonRoc

I have to look at the exhaust. I know for sure the procharger eats a ton of HP. Even on the 1300hp whipple motors the 96# injectors work fine. I had to get 120's for this one. So its eating a lot of HP to make it. At the rpm im running the cam is small, but if I went much bigger I would not get on plane. I will see what this new cam does its a little larger. That will test the theory...

GPM

I see you went with a 10 degree split, didn't seem to hurt the power much, maybe just gave the exhaust time to work. What were your EGTs ?