How do I tell what compression KA24E pistons my '90 has?

Post by **phoenix_fire180SX** » Sat Feb 21, 2004 7:27 pm

I don't remember what the two different compression ratios are, I just remember that midway they lowered the compression ratios but adjusted something in the computer to produce the same amount of power. Anyway, I was wondering how you can tell what you have (VIN maybe)?

Post by **knightrider** » Sat Feb 21, 2004 7:27 pm

manufacter date. early motors had 9.1 compression. later single cam motors had 8.6:1 compression, i believe an easy way to tell is if you have a air temp sensor, you have the 8.6 compression both motors have the same bore, stroke. meaning nissan prolly started using a thicker head gasket, or changed the head design for lower compression, they also changed the ecu

nissan technical bulletin TS89-072 covers the compression change.

Post by **TrunkMonkey** » Sat Feb 21, 2004 7:27 pm

all 90s have the 8.6:1 compression ratio.

-demetrius

Post by **Dutch** » Sat Feb 21, 2004 7:27 pm

Anyone know what the 93 ka has?

Post by **TrunkMonkey** » Sat Feb 21, 2004 7:27 pm

Dutch wrote:Anyone know what the 93 ka has?

9.5:1

-demetrius

How do I tell what compression KA24E pistons my '90 has?

How do I tell what compression KA24E pistons my '90 has?

Nissan Forums

Infiniti Forums

Datsun Forums

Technical Forums

Classifieds / Marketplace

Nissan Motorsports

General Forums