I have searched and cant find the info. My haynes manual says read the sticker under the hood. Well the hood is on a 82 FB so no good. Just got the motor running, and I want to check the timing. Its a 90 jspec running on a N-374 jspec computer. It has the standard modds, 3 inch dp, cone filter, walbro 255, no emissions, aluminum flywheel, TB modd, .

The problem is I had to put on a rb underdrive main pulley because the stock one was rubbing the pointer on the SE front cover. Otherwise i wouldnt be posting this question. Also does the ECU control the split between trailing and leading.?
Thansk for the help. This is my first jump into fuel injection, computers, and turbo.

 

Does the RB UD Pulley have timing marks?

Stock timing is 5*ATDC at idle (750 rpm or so). It would have been the yellow mark on the stock pulley.

Yes, the stock ECU controls trailing split. It will run stock split at idle (15 deg), less under cruise and then a higher split under boost.

 

the rb pulley has two marks first is 20 BTDC and the next is 10 BTDC. I added a third mark with a drafting compass it is 0 TDC. So it is actually after tdc I will have to add another mark. Does the timing advance relatively quickly under throttle. Thanks

 

Yep. Stock timing is ATDC and as soon as you give it some gas, especially after 1000 rpm, you should see the timing advance to BTDC.

 

Thanks for the help.