Still identifying pistons

Post by **JJ240** » Sun Apr 13, 2003 2:04 pm

Anyone know a way to tell 8.6 KAE pistons from 9.2 KAE pistons visually with rods attatched? I cant find anything in regards to a part number on them. They are flattops.

Post by **jrc90240sx** » Sun Apr 13, 2003 2:04 pm

I thought the 8.6 where dished, and the 9.1 were flat. but what do i know

Post by **JJ240** » Sun Apr 13, 2003 2:04 pm

Thats what I thought too, but daunttless thought that some were dished and some flattops...anyone else know? I tried to calculate the compression but i dont know the KADE head chamber volume. I cant put these things in and expect to not blow my engine if they are the 11.6:1 someone has to know for sure

Post by **JJ240** » Sun Apr 13, 2003 2:04 pm

Come on, I cant believe noone knows for sure. All of you guys who have rebuilt your late 89 and 90 KAE were your pistons dished or not? and anyone who has rebuilt an early 89 were your pistons flattops?

Post by **Open4Cycle** » Sun Apr 13, 2003 2:04 pm

1990 KA24E from 240SX, DISHED.

Post by **JJ240** » Sun Apr 13, 2003 2:04 pm

ok cool thx

Post by **ADAMHU** » Sun Apr 13, 2003 2:04 pm

early 89 was dished...

Post by **JJ240** » Sun Apr 13, 2003 2:04 pm

hmm, so your higher compression ones were dished too? crap. Then I have no clue yet again what mine are.

Post by **Open4Cycle** » Sun Apr 13, 2003 2:04 pm

I'm 99% sure the 9:1 pistons are flat tops. The dish in the 8.6:1 is very shallow. They changed from 9.1:1 to 8.6:1 during the 89 model year.

Post by **TrueSlide** » Sun Apr 13, 2003 2:04 pm

For my 89 pistons, which I recently replaced, the 8.6:1 pistons are noticably different from the 9:1. The 9:1 has a slight dip in, the 8.6:1 is much more noticable.

Post by **TrunkMonkey** » Sun Apr 13, 2003 2:04 pm

ADAMHU wrote:early 89 was dished...

gotta dispute.

i've taken apart two early SOHCs and they are flat. (actually, they have an ever so slight dome, but so as not to confuse anyone...they are flat). the late 89-90 pistons have the dish.

-demetrius

Post by **TrunkMonkey** » Sun Apr 13, 2003 2:04 pm

TrueSlide wrote:The 9:1 has a slight dip in, the 8.6:1 is much more noticable.

there is a picture of the 9.1 pistons in the nisssan motorsports catalog. there is no dish. if you run your finger across the top of it, you'll notice a very slight lip. the center of the piston is actually higher than the outside.

-demetrius

Post by **TrueSlide** » Sun Apr 13, 2003 2:04 pm

demcj wrote:there is a picture of the 9.1 pistons in the nisssan motorsports catalog. there is no dish. if you run your finger across the top of it, you'll notice a very slight lip. the center of the piston is actually higher than the outside.

-demetrius

I meant lip, but that word didnt come to mind. Lip, slight dip, sorta the same thing

Still identifying pistons

Still identifying pistons

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