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| Large Valves for H89 head |
Subject: Large Valves for H89 head
by rgjt405 on 2022/7/21 3:49:49
I'm trying to find a source for 40 mm intake valves for the H89 head with a stem of 8 mm with spending an arm and a leg on them or buying custom valves at $40 per valve.
The early L16 on the 510 used 38 mm intakes and 33 mm exhaust that can be cut down to the 103.8 mm A14 valve length and regrooved.
The later L16 engines increased to 42 mm intakes which is too large for the H89.
Has anybody found a good source for 40 mm intake valves.
I have the 33 mm exhaust from the early L16.
I was planning on undercutting the 8 mm stems down to about 7.5 mm since valves are mostly are 2 part valves.
I don't want to risk cutting them down to 7 mm especially when revving to 8800 RPM.
To keep costs down I really don't want to go with 7 mm stems which would need need guides and more machining costs.
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