Which rb20 do I have.....

[Torque27]

I am ordering a nistune ecu. They have different ones for an r31 and r32 rb20's.

The rb20 I have has ECCS here is what I pulled on the web.

The early twin cam engines are generally referred to as 'Red Top' engines because they have red cam covers. The early twin cam engines featured the NICS

"Later 'Red Top' twin cam engines used in the R31 series Skylines from late 1987 onward use the ECCS system and a different intake manifold arrangement.

Laurels, R32 Skyline and Cefiros used the second (1988-1993) series RB20E/DE/DET. This had an improved head design, and used the ECCS injection system. These later motors are known as 'Silver Top' engines "

Problem is my stock valve cover color is unkown.

Can I look on the ecu or something?
Modified by Torque27 at 12:47 AM 1/3/2009

[Carl H]

take a picture.course if the valve covers are smooth then 99.9% chance its an r32/a31 rb20det aka silvertop.

[Sil240]

Really I thought ALL red tops had NICS ecu's..Good stuff to know..