Melted RB20DET piston
By Murph
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This came out of my mates RB20DET a few weeks ago. The initial damage was due to detonation caused by a shagged fuel pump. The result was 20psi down on cyl 1. Pump was fixed and the motor ran great for another year or so at well over stock power levels. Eventually as the rings condition degraded, more oil was getting into the cylinder lowering the detonation threshold to the point it was pinging at stock boost. Eventually it let go in quite a dramatic fashion....and this was the result!
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I know a few people were following along on this- been a while since I last posted here- but finally all came together!
Mounted up and running strong! Still a few details to work out; but runs good, sounds good, feels good on the initial pulls. Super happy it worked out!
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Well I decided to go for it -
Went with 42's and a TWM manifold. Still lots to sort out, but Ill start another thread on it somewhere and link it back here. Rought calculations hopefully put it in between an OER setup and a Mikuni PHH setup $wise.
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By duffymahoney · Posted
I would probably do them in pairs, then each pair goes to a common shaft.
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Part of running a single shared throttle shaft was for a super clean look- like how datsun_tokyo linked above has it.
I also still haven’t decided on the manifold- but was planning on the TWM one- seems to be the cleanest and allows me to run without all the linkages.
With that said I’m interested- I’ll shoot you PM.
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