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Engine Specific Info and Questions => IDI Engine => Topic started by: zooky on June 22, 2006, 07:48:38 am

Title: Exhaust port matching
Post by: zooky on June 22, 2006, 07:48:38 am

just finished matching the intake ports, it was easy, not much materal to remove. The exhaust ports have more materal, almost 1/8 all around. That seems excessive, I dont want to cut too deep. Is there enough material there or should I just maybe do half. Polish or no polish, I searched and found conflicting results...

Title: Exhaust port matching
Post by: Dr. Diesel on June 22, 2006, 08:21:46 am

there's theory that having a step up in size from ex. port to manifold helps out. Anti-reversion or something like that. Might be worth looking into just leaving it that way.

Title: Exhaust port matching
Post by: zooky on June 22, 2006, 08:31:29 am

that makes sense, I'll probally match the manifold and do half on the head.