what the difference bewteen 89/90 e pistons ??are 248x2 safe cam setup using these pistons??and can i use de rings on e pistons??

 

Comp ratio is different. Yes they will work with dual248s. Im not sure about the rings tho. thatll be self explanatory tho when you get them side to side. .

This isnt a bolt on project tho. Invloves tuning.

BigVinnie should chime in, and explain more in detail.

 

anyone?

 

89 = 9.1 C/R 90 = 8.6 C/R

9.1 C/R KAE Pistons on the DE will give you a Final 11.6 C/R.

Doing some Research It seems that The Valve Reliefs Do Not Align so Using Aftermarket Cams w/ SOHC Pistons should not be done

 

yo has anyone thought of using after market e pistons like from cp ??will it bump the c/r up jus like the stock ones?

 

well I mean if the C/R is different, the final in the DE will also, ie 10.0:1 C/R SOHC will be like 12.5:1 in an DE. Highest I've seen for an DE is 11.0:1

 

me to thats je pistons.. i was just askin cuz i dont wanna bore out the motor..cp sohc were 9:0:1 so that sounded perfect

 

what u guys think

 

I dont quite understand what you said in the last part of your last post????

 

You can't use high lift and duration cams with the 89 pistons. You will be limited to 240/248 cams and be making minimum clearance between the valve and piston. I would say get the 90pistons and be happy with a 10.7:1CR.
Either that or have a head shop shrink the quench chamber for you.
If your not going to ecu tune you will at least need an SAFC

 

sweet...tankx vin

 

Hey vin, w/ the 90 Pistons, do you know how much clearance there is?
would a 248/248 Exh cam combo work?
What about the Nismo 248/256 10.7mm lift?

 

if that does clear then bc 264/264 Duration
9.52mm/9.52mm Lift should no problem at all or no????drop some knowledge upon us vin

 

im tryin 2 avoid havin to bore my block out to save time and money wit this cam selection...what are the "++'s" to havin your block bored out?

 

Well not exactly, thought it may have less lift, the valve will be open much longer thus the valve being more open longer