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DonE DonE is offline
Wo ist die Rennstrecke?
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Join Date: Mar 2004
Location: Brooks, GA
Posts: 1,211
Good idea on moving the thread.

Nathan - I don't know if the cylinders are heavier than stock, but I would imagine so since they're steel with thicker walls.

As for the mating of the steel cylinders and AL heads, I haven't had a problem. Keep in mind that I have a stainless fire ring as well. I use stock copper shims that have been opened up (again, larger barrels) by JB racing as part of their kit. If you give them all the measurements, they'll get you the proper shims.

JB uses a proprietary process to fit their CNC aluminum cooling fins to the steel cylinders. I've been to their shop a half-dozen times and they won't show me how its done.

If you're interested, I recommend that you speak to the Porsche specialist at JE Piston about how they work with JB to design pistons to work with these cylinders. The JE Porsche specialist uses the cylinders in his track car. I would also talk to Jim Higgs, owner of JB. See how he presents the cylinders to you and see if it makes sense.

You might want to consider one more call - to LN Engineering. Even though they are competitors (Nikkies vs steel), these are two class operations and will give you good pro's and con's to their products. When comparing the two, I decided on JB because of cost and they did all my other machine work. Otherwise, they are two great products in their own rights.

Good luck.
Old 12-29-2007, 07:23 AM
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