Compression Ratio on built motors

There is mechanical compression ratio, and actual compression ratio.
Cam timing has a lot to do with it ,
And if you’re not turning your CR between 5000 and 5500 you’re going to have huge problems keeping it together.
A 2.6 puller needs between 18 and 19 to 1 , but that is only with a CR system. You have to have the cam timing and a correct intake manifold. This is why in the near future; you will not see anything competitive in the 2.6 class that is not CR. I would guess around 1100 hp will be the top of the pack .
The cam for this will be a 60 mm cam with a 1.85 rocker and .625 intake lift and 225 degrees on the intake, 216 on the exhaust with a 222 LSA .
 
Had 14.5:1 in My DD/Pull truck. Total pain in tha butt trying to get it to start in anything below 70*! Glad I got rid of it before the raly cold stuff came in!!!!


But I did learn that unless im building a strict 1500+HP Puller/Racer DO NOT drop the compression!!! Not worth the trouble, cost and driveability!!!!!
 
WUnderwood said:
Comp, since you have dominated the drag racing aspect of diesel motorsports, you moving on to sled pulling now?
Click to expand...

yes , a couple of 383 cid high end 2.6 motor programs ,
CR, ZZ individual runner manifold , 60 mm tool steel cam, big ratio rockers , 4.5 stroke 4.250 bore


my dragster is almost there and you might rethink you words , because that might look sill in a few months . you can laugh all you want , but in a few months , I plan on once again being the fastest diesel on the planet .
 
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