Jump to content
HybridZ

P90 and P90A cam same?


Ivan280zt

Recommended Posts

This is new to me about the difference in cams between P90A and P90. Yo, how did you find this out?

 

I have a Nissan re-manufactured L28ET in my Z, with a P90A with solid pivots. Makes me curious how I can optimize my setup...

 

FL327, I'm not sure how the difference in the '83 inital ignition timing advance has to do with a camshaft timing difference, but given Yo's info about camshaft timing, they could be related I suppose.

 

I have my cam timed straight-up, and I plan to swap on my old P90 soon, but I may play a little with initial ignition timing.

Link to comment
Share on other sites

Cody - i believe only the '83's are 24* and both the '81 & '82 are 20*. Wish i had my cam out of my '82L28ET P90 right now because i have my cousins '83L28ET P90a cam sitting on the bench. I could've snapped some comparison pics of it to post. If i can find some good shots of a P90 cam on the net, i'll try and duplicate the picture using the same angle of the P90a cam.

Link to comment
Share on other sites

There are 3 turbo cams. Look on the back of the cam for a letter stamped there. The J grind is 81-82 manual transmission, B grind is 81-82 auto, and the M is 83 manual and auto.

 

There is not enough difference in them to matter, but for what it is worth, I was running the B grind, and have not come across a J yet.

 

All 3 cams are interchangeable. Where you run into issues is using an aftermarket cam with a hydraulic (note proper spelling) head. Unless everything is just right, get ready to buy a new cam.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...