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b21 pistons in a b20??? 120-130

uid 32173's pic
posted by  Gary L on  Wed May 4 04:25 CST 2011
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last visit: Wed Oct 22 10:26 CST 2014
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"Finally, the intake valves. I have no idea why they are 42mm. I would think someone would have a lot of trouble trying to fit smaller valves in it's place. How and why they are in there is beyond me, but I'm certain that they are 42mm."

I've seen cheated-up ITB race car heads with undersize valves installed, the idea being you get slightly better flow if the valve head is smaller... not the port/seat mind you, just the valve head. It is clearly an illegal modification, but guys are always wanting an edge. I do not know if this actually works, just speculating as to why you have the 42's.

There is an incongruity here though, as anyone wanting to make hp with an IT engine should have been using the "E" head, not the "F".

--

Gary L - 142E ITB race car, 73 1800ES
BlueBrick Racing Website
YouTube Racing Videos






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