Help nailing down CR

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Jun 3, 2009 | 09:04 PM

Prop Job

Thread Starter

Burning Brakes

Joined: Dec 2008

Posts: 818

Likes: 444

From: Maumelle, AR

Help nailing down CR

I've got afr's milled to 59cc, 3.905 bore, 4.000 stroke, -28cc dish piston. What head gasket would get me down around 10-10.5:1 CR? Or whatever CR would be best with the 2.8L Kenne Bell.

Also, does this sound like a proper build? The pistons and KB haven't been purchased yet but are the parts I've got my sights on.

Jun 3, 2009 | 09:16 PM

Brandon619

Le Mans Master

Joined: Dec 2003

Posts: 5,047

Likes: 252

From: San Diego

I would go with a bit lower compression myself with that being said some people around here fair well with 10 plus compression. I would just use GM head gaskets

Jun 4, 2009 | 07:10 AM

BLOWNBLUEZ06

Tech Contributor

Joined: Apr 2007

Posts: 10,924

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From: Forney Texas

There is no head gasket that will take a -28cc dished piston to 10.5:1 346 engine. A -14cc will get you around 9.5:1 and a -6cc will get you to ~10.5:1

Jun 4, 2009 | 07:45 AM

Prop Job

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Burning Brakes

Joined: Dec 2008

Posts: 818

Likes: 444

From: Maumelle, AR

I was wanting to go with that piston because it's FI specific, but your saying just a general forged piston with those numbers would be better?

Jun 4, 2009 | 08:28 AM

0Louis @ LG Motorsports

Former Vendor

Joined: May 2003

Posts: 2,173

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From: Dallas Texas

59cc heads, -28cc dish and a .054 gasket with that combo yield 9:1. Same setup with -16cc dish = 10:1

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