The real ? is why would you run those pistons in your sr20 when for the same price and work you can run better pistons....... As for your ? I'm not sure but this is something the old school guys used to do because of lack of piston options.

 

Uh yeah, this is real. Show me what better pistons I can get for the price of a set of used VG30DETT pistons! Please show me and I will go that route. Thanks

 

Well whats engine are you putting these in. After the price of boring your engine and doing all the work to get these to fit your sr20 you could have forged pistons in the motor. Sr20det pistons will drop right in and support the same power as the vg30dett pistons. There is a lot more to a well built motor then better pistons the weakest link in your sr20 is the oil pump and chance of spinning a rod. Save your $ and do it right the first time.

 

Thanks for the reply, but I already knew all of this. Not trying to be a butt, but I happen to have an SR20DET that has broken ring lands and a small scratch in one of the cylinders. That being said I also have a set of VG30DETT laying around ( I recently sold my Z) pistons, so you can see where I'm going with this. Not trying to skimp, as any pressure cast nissan can hold some abuse IF TUNED CORRECTLY. So if I can use these these pistons and save oh... $500-$600 over forged ones then I will, and I think the money saved can buy a good oil pump. I really nee to find out the pistom volume of a VG30DETT piston and the deck height of an SR20DET and I can figure the SCR on my own, but I can't seem to find this info... yet. Thanks

 

OK here is some info maybe it will help

N/A vg30de c/r 10.5:1 these pistons in a sr20 make it 11:1

vg30dett 8.5:1 c/r

not sure but you might be able to do some math and figure out the c/r you will get.

 

I think I can recall someone stating that VG30DET pistons in an SR20 block would put the CR around 9.1:1?

I didn't follow it very closely, so I could be off, though.

 

Thanks for the info guys, the 9:1 sounds right, but I still need to do some math to nail dead on. Thanks again.