Let's talk compression height

[Griswald]

I currently run a 4" stroke with 1.0" compression height. I recently had to run a different fuel and lifted the ring lands on 3 pistons. I was thinking of going to a 5.85 rod to get a little more on the top. My builder supposedly talked to JE and they supposedly said that I won't gain enough to really make a difference. I've also heard that as long as the tune up is right and the rings have a good seal it shouldn't matter. This is on a 2kit SBC.

Opinions?

[nos81bu]

gris i like to hear some details on your combo...I plan on going to a 434ci this winter whats your opinion on that

[Monty Mikho]

I have run from 1.150 - 1.250 pistons always had more than enough room for .250 up top.. Only problem I had with a 1.150 (.350" ring stack and a .990 pin) as the wrist pin hole broke thru the top of the oil ring land. I had problems with oil rings getting up in this area and sticking.. Bill Miller always gave me the best results on pistons...

[Griswald]

Paul, my combo is splattered all over the MR site. BTW - PM Sent



Went ahead and ordered the same slugs as last time. I learned a big lesson and that's not to change fuel at the track. I always run VP and wound up with Sunoco at the last race which I believe led to my problem. If I run into problems this go-round I might have to look at shortening the rod and getting some different pistons.