sohc pistons same as dohc, right?

[lucki17]

if i buy after market pistons for a dohc they fit sohc right? thats what ive heard anyways, if not does anyone know a link for sohc pistons? i want some lower compression ones for turbo.

[logik23]

Someone said that SOHC pistons in a DOHC raises compresssion to 9:1.

[J SPEC SilEighty]

early 89's had 8.6:1
the rest of the sohcs had 9.1:1
all dohc's had 9.5:1

[SR20DETpower]

yes the pistons will interchange.. its sort of a cheap mod to do for some more horsepower if ur running N/A..... or even small amount of boost

edit* thats SOHC pistons into a DOHC block....

[musicsurfman]

Actually The Sohc Pistons Raise The Compression Of A Dohc Over 10 To 1 (although I Forget The Exact Number)

[lucki17]

so does that mean i could put dohc pistons in my sohc and it would have lower compresion? are they strong enough to run a good psi (like 12 or 15)

[GT500916]

whats DOHC stock compression? 9.5:1 or 9:1? and i also heard this guy toop KA24E pistons and put in his KA24DE and had 11:1 compression

[musicsurfman]

Yes You Can Use Dohc Pistons To Lower The Compression..... Its A Common Swap Because Its Cheap.

[lucki17]

do i have to take out the engine to change those or can i do it in car?

[GT500916]

Originally Posted by lucki17

do i have to take out the engine to change those or can i do it in car?

i think you can do it in the car, im not sure yet, i did my stang and my blazer with engine in the car, but dont know about the 240 engines and how hard or easy it would be from the bottom. Id say as long as you can take off the oil pan at the bottom and have no problem getting to the rod bolts then you should be fine, and ofcourse you would have to take off the head to push the pistons out on top...

[lucki17]

cool thanks, sounds like a fun weekend project.