so i picked up a 20v ST block and was wandering if i have to swap out the pistons to 16v pistons to run it with a 16v head or can i run the 20v pistons with a 16v head? thank you

You can run the stock silvertop bottom end with the stock 16v head. The ST pistons are junk though when paired with the head, valve reliefs are way off etc etc. It's called a 1620 engine. Just a heads up, you can get high comp 16v pistons from rockauto for $84 for the set of four. Built a motor a few months ago like that. ST bottom end, Highcomp pistons, Low comp head w/ Low comp cams.

HASport AE86 wrote:You can run the stock silvertop bottom end with the stock 16v head. The ST pistons are junk though when paired with the head, valve reliefs are way off etc etc. It's called a 1620 engine. Just a heads up, you can get high comp 16v pistons from rockauto for $84 for the set of four. Built a motor a few months ago like that. ST bottom end, Highcomp pistons, Low comp head w/ Low comp cams.

what year and what car did you look up on rockauto and what brand pistons? thank you

hachiroku ae86 wrote:

HASport AE86 wrote:You can run the stock silvertop bottom end with the stock 16v head. The ST pistons are junk though when paired with the head, valve reliefs are way off etc etc. It's called a 1620 engine. Just a heads up, you can get high comp 16v pistons from rockauto for $84 for the set of four. Built a motor a few months ago like that. ST bottom end, Highcomp pistons, Low comp head w/ Low comp cams.

what year and what car did you look up on rockauto and what brand pistons? thank you

1991 Corolla GTS... should get you the correct piston listings... the only one I saw I'm sure are high comp pistons are - DNJ ENGINE COMPONENTS Part # P927. Check your block BEFORE you order.... your block MAY need to be overbored, so buying standard bore pistons wont help you........ they do offer 2 overbore sizes... .020" is 1/2mm oversize, .040" is 1mm oversize

also will i have to adjust the valves or will they be fine

hachiroku ae86 wrote:also will i have to adjust the valves or will they be fine

just check that the valve clearance is within tolerances, if not ya gotta buy some shims

Hey I was wondering if u can post up a link to those high comp pistons I just went to the dealer today and the pistons were $110.00 each

What r the compression ratio on the redtop engines