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Jan 20, 2009 | 05:14 PM

#21

Nathan Plemons

Race Director

Joined: May 2001

Posts: 14,165

Likes: 9

Quote:

Originally Posted by BrianCunningham

If you did a leakdown test, then it's the rings.

You can get shortblocks as well as longblocks from GM.

For what they're getting for a shortblock, you can get one of these non-rollercammed longblocks

http://store.summitracing.com/partde...3&autoview=sku

http://store.summitracing.com/partde...9&autoview=sku

Keep your original engine for rebuild later.

I would recommend getting a roller cam version though if at all possible. Why take a step backward in technology?

Jan 20, 2009 | 05:16 PM

#22

Corvette Chris

Le Mans Master

Joined: Mar 2006

Posts: 5,262

Likes: 0

From: E. Amherst NY

Quote:

Originally Posted by Nathan Plemons

I would recommend getting a roller cam version though if at all possible. Why take a step backward in technology?

I wish my 86 was a roller cam.

Jan 20, 2009 | 05:18 PM

#23

anesthes

Safety Car

Joined: May 2006

Posts: 4,290

Likes: 140

From: Salem NH

Quote:

Originally Posted by Corvette Chris

I wish my 86 was a roller cam.

A hydraulic roller will have the edge under 6,000 RPM and will produce a hair more power.

A flat tappet won't explode at 7500 RPM like a hydraulic roller will from float.

A solid roller will work to 8500 with no problems.

-- Joe

Jan 20, 2009 | 05:23 PM

#24

Nathan Plemons

Race Director

Joined: May 2001

Posts: 14,165

Likes: 9

Quote:

Originally Posted by anesthes

With the right lifters and springs, you can turn 7500 with a hydraulic roller. However, that wasn't my reason. A hydraulic roller can have a more aggressive lobe for any give duration and thus make more power. It's also less friction and they virtually eliminate wear. Besides, since he's talking about using it with a TPI, 6000 RPM is really a moot point, let alone 7500 or 8500 !

Jan 20, 2009 | 07:11 PM

#25

Iroc57

Melting Slicks

Joined: May 2007

Posts: 2,171

Likes: 1

From: Warwick RI

Quote:

Originally Posted by Nathan Plemons

I would recommend getting a roller cam version though if at all possible. Why take a step backward in technology?

Wouldn't this be considered an unnecessary increase in budget. If the $$$ are the same or close it makes sense but for street thumping if it is more than a $200 difference I can't see the benefit.
Just my $.02