Thread: SR20VE+SR16 piston+ ??headgasket = 12:1 compression ratio?

I have seen SR16VE pistons run in a SR20VE. They could not run with pinging hard in 93 octane pump gas. This would happen betwwen 2000-5500 RPMs.

We got the pinging to go away with 97.5 octane fuel which was 4 gallons of 93 octane and 1 gallon C16. The car ran great and was very responsive. Never got a chance to put it on the dyno.

I was the one who came up with cutting the top off the piston. I took a set of pistons and cut them off in 1mm incraments for molds to make pistons. That never cam through as I could not get enough people to get some pistons made.

After doing some testing with a VE, I can say 12.5 to 1 can be had on pump gas. If you want to keep it a little safe run 95 octane. That would be 9 gallons 93 octane and 1 gallon C16.

I think 12.5 to 1 is doable without putting to much strain on the motor and your wallet.

Sounds like killing timing around that load point might have helped a little. I guess I'll find out how far I can go with tuning it.

damn this thread wants me to make a rwd na ve running 16ve uncut pistons in a de rwd block tuned for e85, then wack it into a 700kg ke70

I would love to see a Datsun 510 with

SR20VE RWD
2.2L 12.5 to 1 compression, 90mm pistons x 86mm stock crank

Lets say you make 230-240 WHP and the 510s weight is 2000 pounds, that would be a great car.

would be hot indeed.

im sure the piston could hold a mm less of thickness on the top .... some forged ones would be nice