Engine Builders, Please Help
Thread Starter
Burning Brakes
Joined: Feb 2003
Posts: 1,144
Likes: 18
From: Panhandle FL
Engine Builders, Please Help
OK, I've had this project going 2 years. Mainly just buying parts and stocking up. I'm kinda lost on whats next for the rotating assembly (balancing). Here's what I've got. 1 4 bolt main lt1 block with arp main studs. New eagle steel crank, eagle H beam rods, mahle forged pistons, decent shape DM flywheel. I weighed the pistons and rods, from lightest to heaviest its about 2 gram difference. Would you balance it? Does the machine shop balance the flywheel with it? Is the harmonic nuetral like I've been told? It's not gonna see 7K rpm, is it worth it? 
Race Director
Joined: Feb 2004
Posts: 12,517
Likes: 19
Originally Posted by SPEED750
OK, I've had this project going 2 years. Mainly just buying parts and stocking up. I'm kinda lost on whats next for the rotating assembly (balancing). Here's what I've got. 1 4 bolt main lt1 block with arp main studs. New eagle steel crank, eagle H beam rods, mahle forged pistons, decent shape DM flywheel. I weighed the pistons and rods, from lightest to heaviest its about 2 gram difference. Would you balance it? Does the machine shop balance the flywheel with it? Is the harmonic nuetral like I've been told? It's not gonna see 7K rpm, is it worth it?
Pro
Joined: Oct 2005
Posts: 721
Likes: 1
From: Charlotte NC, behind someone going 10 under the speed limit
It wouldn't hurt anything to balance it/them, i'd give the shop the flywheel and balancer too. sometimes they want to balance those too, just to cover their rears.
Former Vendor
Joined: Jun 2001
Posts: 7,204
Likes: 6
From: St Marys PA
Balance it.
The crank, pistons, and all the other goodies need to be taken into consideration to get it right. Balancing a setup is not that expensive when compared to what time/money you will have in it if something is not right.
2 grams at 6k rpms is like a 10lbs! Our guy will not let anything over 1/2 gram go without tweaking.
The crank, pistons, and all the other goodies need to be taken into consideration to get it right. Balancing a setup is not that expensive when compared to what time/money you will have in it if something is not right.
2 grams at 6k rpms is like a 10lbs! Our guy will not let anything over 1/2 gram go without tweaking.
