Externally balanced LQ4 - bad idea?
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Joined: Aug 2002
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From: Hartsdale, NY
Externally balanced LQ4 - bad idea? I keep seeing advertisments for the fully forged 402CI SLP iron short block (LQ4) in various magizines - the latest version apperaed in this months' Hot Rod Magaizine.
I read here that it is an externally balanced unit, however. I am considering this for a M6 conversion.
From what I gather, externally balanced short blocks require the use of a:
1. Weighted flywheel
2. Weighted crankshaft pulley
I had a 454 big-block Vette that was externally balanced; it did not present any major issues when I rebuilt it several years ago.
Question: Is an externally balanced Gen 3 a dissadvantage - other than having to also buy a flywheel, clutch, throw-out bearing, etc, and balancer from SLP?
They also advertise this as adding only 60 LBS to the car; I know the weight difference of the iron block is at least 90lbs.... Is this unrealistic hype from SLP?
I read here that it is an externally balanced unit, however. I am considering this for a M6 conversion.
From what I gather, externally balanced short blocks require the use of a:
1. Weighted flywheel
2. Weighted crankshaft pulley
I had a 454 big-block Vette that was externally balanced; it did not present any major issues when I rebuilt it several years ago.
Question: Is an externally balanced Gen 3 a dissadvantage - other than having to also buy a flywheel, clutch, throw-out bearing, etc, and balancer from SLP?
They also advertise this as adding only 60 LBS to the car; I know the weight difference of the iron block is at least 90lbs.... Is this unrealistic hype from SLP?
Here is post #27
Originally Posted by horsepower
Guys -
Thanks for the interest in SLP's new ZL 402 short block. I would like to clear up some of the rumors, and offer some facts about the package. The package has not been officially released quite yet, as engine #1 is actually still busy being thrashed/tested on our dyno. All testing should be completed within a week or so.
Anyway, a detailed editorial about SLP's new 402 was published in the May/June 2004 edition of Pontiac Enthusiast Magazine (the only typo is the 60# weight reference- the iron block weighs 100# more than the aluminum. The cost was originally stated as $3995, we have since LOWERED it to $3595.). I recommend reading the article if you are interested.
Here are the main ingredients:
1- Production 6.0L cast block
2 - Internally balanced rotating assembly
3 - SLP spec'd Eagle 4" crankshaft
4 - SLP spec'd 6.125" I-beam rods (Eagle and Manley)
5 - SLP spec'd 4" pistons, 2618 forging (Ross and Manley)
N/A version (approx 11.2:1)
Heavy-Duty, Forced Induction version (approx 9:1)
6 - $3595 retail
7 – 402 CID 'rotating assembly' sold separately (parts only, no block, not assembled)
8 - SLP will also offer 383 CID rotating assemblies (no short block 383....right now)
Best regards,
Brian
Thanks for the interest in SLP's new ZL 402 short block. I would like to clear up some of the rumors, and offer some facts about the package. The package has not been officially released quite yet, as engine #1 is actually still busy being thrashed/tested on our dyno. All testing should be completed within a week or so.
Anyway, a detailed editorial about SLP's new 402 was published in the May/June 2004 edition of Pontiac Enthusiast Magazine (the only typo is the 60# weight reference- the iron block weighs 100# more than the aluminum. The cost was originally stated as $3995, we have since LOWERED it to $3595.). I recommend reading the article if you are interested.
Here are the main ingredients:
1- Production 6.0L cast block
2 - Internally balanced rotating assembly
3 - SLP spec'd Eagle 4" crankshaft
4 - SLP spec'd 6.125" I-beam rods (Eagle and Manley)
5 - SLP spec'd 4" pistons, 2618 forging (Ross and Manley)
N/A version (approx 11.2:1)
Heavy-Duty, Forced Induction version (approx 9:1)
6 - $3595 retail
7 – 402 CID 'rotating assembly' sold separately (parts only, no block, not assembled)
8 - SLP will also offer 383 CID rotating assemblies (no short block 383....right now)
Best regards,
Brian
