Piston change question
Thread Starter
Launching!
Joined: Jun 2006
Posts: 225
Likes: 9
From: Hudson Valley NY
Piston change question I have a LS7 with about 7k miles on it w/-14cc dish pistons,4.125 bore.I want to go to flat top pistons.Can I just swap them out w/ LSx 4.125 flat top pistons without honing out the cylinder's or anything else....................Paul
Thread Starter
Launching!
Joined: Jun 2006
Posts: 225
Likes: 9
From: Hudson Valley NY
I don't want to take the motor out of the car though.I want to drop the cradle and the oil pan & take the heads off.What about if I weigh each piston & rod as they come out and put the new piston on the rod and weigh that................Paul
Last edited by DRIVER456; Aug 2, 2008 at 08:56 PM.
TECH Apprentice
Joined: Oct 2007
Posts: 301
Likes: 20
You can't weigh the piston and rod as one. All of the piston and part of the rod is reciprocating weight, part of the rod is rotating weight. Chances are there will be enough difference in weights that the crank will need to be rebalanced. I'd pull it and run a dingle berry hone thru the bores, clean it and reassemble after checking out the balance issues.
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
The cylinders would need to be honed only if you have to use different rings. Going from a dish, to flat tops will probably suffer significant weight difference. Doing all that work with the engine in the car probably isn't a good idea. I agree, you'll probably wish you just pulled the engine out in the end.
