Best way to 14:1 compression
Former 757'er
Joined: Nov 2002
Posts: 1,214
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From: Louisville, KY
Originally posted by CHAHONDA
well...say for example you want to build a 350 chevrolet motor. stock they have a 5.7 inch rod. lets say you want to use a 6 inch rod and still have a reasonable c/r. if you look in jegs or summit you will see pistons that are designed specifically for that application. hence the revised pin location. the reason for the longer rods is to slow down the piston speed and to keep the piston at top dead center longer!! make any sense???
well...say for example you want to build a 350 chevrolet motor. stock they have a 5.7 inch rod. lets say you want to use a 6 inch rod and still have a reasonable c/r. if you look in jegs or summit you will see pistons that are designed specifically for that application. hence the revised pin location. the reason for the longer rods is to slow down the piston speed and to keep the piston at top dead center longer!! make any sense???
Asshole Supreme
Joined: Nov 2002
Posts: 4,843
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Originally posted by CHAHONDA
well...say for example you want to build a 350 chevrolet motor. stock they have a 5.7 inch rod. lets say you want to use a 6 inch rod and still have a reasonable c/r. if you look in jegs or summit you will see pistons that are designed specifically for that application. hence the revised pin location. the reason for the longer rods is to slow down the piston speed and to keep the piston at top dead center longer!! make any sense???
well...say for example you want to build a 350 chevrolet motor. stock they have a 5.7 inch rod. lets say you want to use a 6 inch rod and still have a reasonable c/r. if you look in jegs or summit you will see pistons that are designed specifically for that application. hence the revised pin location. the reason for the longer rods is to slow down the piston speed and to keep the piston at top dead center longer!! make any sense???
corona connessuer
Joined: Nov 2002
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From: GUAM
Originally posted by 0psi
I understand what a longer/shorter rod will do to piston speed. I was just trying to understand how you could stroke a block, not increase deck height and use a longer rod.
I understand what a longer/shorter rod will do to piston speed. I was just trying to understand how you could stroke a block, not increase deck height and use a longer rod.
Former 757'er
Joined: Nov 2002
Posts: 1,214
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From: Louisville, KY
Yep, just by stroking the crank a little, getting different pistons and rods in an Olds 350, you can get a 375 with just a little boring. It's only 25cu in, but the dynamics of the motor are alot better, Typically good for an average of about 50-75hp.
Now, if you use a 350DX small blocked Olds, you could (at very best) stroke it out to a 440cu in It's not common that you get a block good enough to go that far with, the most common is low 400's.
Now, if you use a 350DX small blocked Olds, you could (at very best) stroke it out to a 440cu in
It's not common that you get a block good enough to go that far with, the most common is low 400's.
Asshole Supreme
Joined: Nov 2002
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Must be nice. Stroking is not in a Honda engines best interest when spinning at over 8,000 rpm. Careful attention needs to be paid to the Rod/Stroke ratio on high rpm motors. I wish I could stroke my stock block 25cu. haha That would be great!
Former 757'er
Joined: Nov 2002
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From: Louisville, KY
There's alot to be had in the Olds motors with stroking. It'll make any combination come alive by stroking it out a little. Olds motors aren't known to need to spin high rpm's though. Most strip motors never see above 6k rpms. The street/strip guys often shift at 5k-5500, that's where out powerband is. An Olds BB will make good useable torque (on a properly built engine) from around 1k rpms to about 5k rpms.
corona connessuer
Joined: Nov 2002
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From: GUAM
Originally posted by Blasphemous
There's alot to be had in the Olds motors with stroking. It'll make any combination come alive by stroking it out a little. Olds motors aren't known to need to spin high rpm's though. Most strip motors never see above 6k rpms. The street/strip guys often shift at 5k-5500, that's where out powerband is. An Olds BB will make good useable torque (on a properly built engine) from around 1k rpms to about 5k rpms.
There's alot to be had in the Olds motors with stroking. It'll make any combination come alive by stroking it out a little. Olds motors aren't known to need to spin high rpm's though. Most strip motors never see above 6k rpms. The street/strip guys often shift at 5k-5500, that's where out powerband is. An Olds BB will make good useable torque (on a properly built engine) from around 1k rpms to about 5k rpms.
ah how i miss my 74 omega with a 455 rocket (courtesy of a 69 olds 88)
man how i love the torque!!!!