Quote:
Originally Posted by RETed
Pre-mix is designed to work with internal seals.
I'd question the Idemitsu ratios - maybe for intact OMP's?
Run the usually 100:1 - 150:1 ratios for "normal" driving.
128:1 is perfectly fine.
Also, I wouldn't worry about the compression test numbers.
The more important thing is that they are even.
Numbers will come up.
Different compression gauges will show different numbers.
A sweeping analog needle is something not very accurate in terms of watching for peaks - this is why Mazda used a digital display for their compression tester.
-Ted
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Good to know Ted. I will go to 128:1.
As for the comp test: All I do is hold the valve down on the side and observe the pulses. I have heard of some removing the valve to get a more accurate reading. Regardless we will see at 1500 mile OR maybe 2000.
Drove the car up this morning and SINCE I have put the timing back to the factory 5*ATDC my EGT's have gone up some.
My idle is around: Front-1102*F Rear- 1132*F
MY CONCERN is when I am cruising at about 2400rpm @ about 14.6 AFR my front rotor is about 1545-1554*F and my Rear is running very high at 1612-1623*F.....sometimes a 100*F difference.
When my timing was retarded the temps were obvisously lower(850*@ idle and 1350-1400* @ same AFR and 2400rpm).
I have my rear primary injector getting slightly more fuel, lag settings for front pri inj is .03 while rear pri inj is .04. I was advised to run the rear pri inj slighlty richer due to rear rotors being the common one to blow in S4 motors.
Wierd thing is my front seconadary port has a larger runner diameter because the iron was the later s5 port size and BDC ported it like he ported my last 2 irons. He recieved the front iron last due to some shipping mishaps from the orignal iron seller so he had nothing to compare it to since he already sent my other 2 irons to me. You would think it would run leaner and I would have the oppisite EGT problem BUT I know the LIM runners are smaller and would make the difference barely noticable unless the runners were port matched.
This ports size difference between my secondary runners was the REASON I bought my EGT probes because I felt that the daimeter difference(1/8 inch difference on top and bottom of larger port compared to the other ported secondary runner) would still maybe cause some irregular air intake/AFR issues.
I really wish there was some other info out there(beside Ted's) on common EGT ranges for rotaries. I know each engine is different BUT there has to be some common ground....
BTW...Brian, thanks for the advice on the oil temps and DAMN that was some milage in that short time. You had me all down and out on myself.
