Compression
#22
Senior Member
RACING JUNKIE
Thread Starter
Join Date: May 2003
Location: Coldwater, MI
Posts: 2,998
Making another change also was going to just recondition rods but decided to buy new instead while doing so I am changing from 6.385 to 6.535 for a better rod angle. Machine shop thinks this will take advantage of the heads I have. what do you guys think about this swap ? :shock:
#23
Senior Member
RACING JUNKIE
Join Date: Jan 2006
Location: La.
Posts: 2,890
The longer rod in most cases will help because it reduces side load on the piston and permotes better sealing of the rings due to piston rock. Ofcourse the higher up you get in the piston with the rod the less rock anyway. I think there's also a theory that the piston travels faster on the down stroke with a longer rod, but i don't know how that works. If you look at the Nascar guys, they are running real short pistons, 3.2 stroke and 6.2 lg rods with the sm/blk chevies and i don't think they base that on theory, but instead what works best, produces power, and what runs longest without losing power from piston and ring wear.
How much HP gain? i don't know :wink: only the the car will know.
JMO
Zip.
How much HP gain? i don't know :wink: only the the car will know.
JMO
Zip.
#24
Senior Member
RACING JUNKIE
Thread Starter
Join Date: May 2003
Location: Coldwater, MI
Posts: 2,998
Zip thanks for the reply, I was thinking the less piston rock also main reason I actually decided to go this way, plus if there is a chance ya gain a few horse might as well try it for the same money
I am trying a new rod this go around, always iffy on doing this, I am a big eagle fan with the L-19's, was going to go callies compstars or K1's decided to go K1's with arp 2000 bolts, motor shop has used them a lot in some high HP stuff with nitrous and says they are a great rod, better then eagle and equal to callies compstars for sure. I also elected to go with Diamond Pistons 14:1 compression.
I am trying a new rod this go around, always iffy on doing this, I am a big eagle fan with the L-19's, was going to go callies compstars or K1's decided to go K1's with arp 2000 bolts, motor shop has used them a lot in some high HP stuff with nitrous and says they are a great rod, better then eagle and equal to callies compstars for sure. I also elected to go with Diamond Pistons 14:1 compression.
#27
Senior Member
RACING JUNKIE
Join Date: Jun 2003
Location: Hobbs, NM
Posts: 842
Originally Posted by hammertime
Hope to find out the difference here in the next 2-3 weeks, got it started up today for first time. Good to hear a race car again
#28
Senior Member
RACING JUNKIE
Thread Starter
Join Date: May 2003
Location: Coldwater, MI
Posts: 2,998
Originally Posted by BEAST477
Yeah hammertime nothing like the sound of big cubes and the smell of race fuel. I'll bet you were glad to hear it fire again.
#29
Senior Member
RACING JUNKIE
Thread Starter
Join Date: May 2003
Location: Coldwater, MI
Posts: 2,998
Originally Posted by dparker
Originally Posted by hammertime
Hope to find out the difference here in the next 2-3 weeks, got it started up today for first time. Good to hear a race car again