2a+RoN

What timing degrees do you guys reccommend for an 87 TII streetported motor?

I have an Mazda racing underdrive pulley and it is marked. It reccommends for leading 15btc@6k and for trailing 10btc@6k.

Looking at the manual, it says to adjust timing at idle, what timing should I be going for at idle then? or should I just time it at 6k?

Any input is greatly appreciated. I'm not too familiar with timing.

Thanks,
Aaron

Aaron Cake

iTrader: (1)

Stock. Don't advance the timing on a turbo...

2a+RoN

what is stock timing at idle? sorry, the manual just says yellow for leading and red for trailing i think, but i have the MR pulley so i'm not sure what stock timing would be on it. It came with a chart and reccommends 15btc@6k leading and 5btc@6k trailing for stock, but that's not done at idle like the manual says. Sorry if its a stupid question.

Also, I did time it at 6k and leading came out to 15btc but when I did trailing it was way off. It was like 30btc and I moved the CAS as much as I could and I could only get it down to 20. Could it maybe be off a tooth when I inserted the CAS? I swear I put in in alligned tho...

J-Rat

iTrader: (2)

I think its 5 deg ATDC. Its listed on the FSM.

2a+RoN

Ok, I found it. It's actually just on the friggin vehicle emmissions label on the underside of the hood, haha. So... L-20 ATDC, T- 5 ATDC. Now WTF, Mazda Racing didn't even put in a 5 ATDC mark on the pulley, only a 20 and then 0. Arghhh!

J-Rat

iTrader: (2)

No, Leading is 5 ATDC, and Trailing is 20. Just set the trailings at 20, the leading should automatically fall into line (assuming your ignition system is functioning correctly).

RETed

I think 2a+RoN meant 20*B*TDC.
Most aftermarket pulleys are only marked for BTDC.


-Ted

J-Rat

iTrader: (2)

That would cause some problems..

loofeeTurboII

i have the same question..i think i red it that is 20 for leading and 5 for trailing.
But my friend was playing with the CAS ( my car is down now, getting ready to start tomorrow) and now i'm afraid to start the car is there anyway that i can preset it b4 i start he car.like diconnect the fuelpump so it won't actualy fire up?? and pre-time it?? or go ahead fir eit up then set it...??? I'll hate to fire it up and kill my 1000 mile street port engine... Thanks in advance

RETed

If it runs, don't romp on it.
You can't kill it just idling.


-Ted

loofeeTurboII

thanks, i'll get it fire up tomorrow..then i'll report to u guys later.. C