Which pistons for racing? |
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Which pistons for racing? |
stugray |
Apr 23 2012, 12:14 PM
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#1
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Advanced Member Group: Members Posts: 3,825 Joined: 17-September 09 From: Longmont, CO Member No.: 10,819 Region Association: None |
What pistons does everyone run in their race engines?
A reputable source tells me that I need forged pistons and to not use anything else. I know two guys that run 914-4s here in Colorado vintage racing that use the AA pistons, and they said that both of their cars have run 5 seasons with no work required to the lower end. AND they are running 10:1 CR and E85 fuel. This engine will be very close to stock 4-cyl 2.0L with a Raby race cam package and 40 IDFs. Thoughts? Stu |
stugray |
Jun 30 2012, 04:02 PM
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#2
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Advanced Member Group: Members Posts: 3,825 Joined: 17-September 09 From: Longmont, CO Member No.: 10,819 Region Association: None |
Thanks for all the response.
I decided to go with the Jake Raby kit that gives you the Keith Black hyperutectic pistons. The instructions in the piston box says to open the upper ring gap by 20-40% from stock for hyperutectic pistons. The hastings rings that came with the kit seem to be gapped at .015 which is at the low end of the factory specs and does not add the 20-40% on the upper ring. Do I need to open the upper ring by the 20-40% specified in the instructions or not worry so much? Stu |
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