I'm planning to replace the points on my 71T. The car has a Permatune installed. I'm planning to replace the cap, rotor and points. I've looked at Pelican but none of the points look like mine. Can anyone identify what I have and what I need? Also, what should the gap in the points be with the Permatune? From what I understand they should be set to stock but I'm not sure.
Thank you,
Don
I believe what I have is "2 piece, separated, right hand points". Does anyone know where I can source replacement parts?
What is the part number on your distributor?
E Sully
1973.5 911T
I didn't know there was a part number on the distributor. I'll check tonight. Thank you.
It looks to me like your points have been disassembled further than need to be. You have a Bosch rotor so I'm going to assume you have a Bosch distributor. Buy points for a 71 Bosch distributor.
Mike de Jong | '71 911T/E 2.4 Tangerine | '74 911S 3.2 Ice Green
Thank you. I've been learning a bunch today. I have a Bosch distributor. Part number -0231 159 001-. I understand this is an older cast distributor. I think these were used in engines much earlier than my 1971 I found points that look just like mine on Pelican. Part number Bosch 616-602-226-02-M14.
I'm still learning quite allot. Especially about my motor. So many things seem to be "non-stock". Here is a picture of my distributor. I'm guessing this worked ok on my engine but this whole exercise started because it was not running correctly. I incorrectly started with rebuilding the carbs when I should have made sure the ignition, fuel, timing etc were correct first. Live and learn. Any advice appreciated.
Update. New points installed. Timing at idol set to 5 degrees BTDC. Carb's sync'ed left and right side. Idol mixture screws adjusted which has dramatically reduced backfire's under idle. I readjusted idle speed throughout this process. Did my best to carefully adjust the air correction screws. Carb's are still sync'ed.
Now, when I accelerate the motor it begins to back fire more and more. (stationary, not under load). Also, when I accelerate I the timing does not seem to be advancing to the 30 degree mark.
If I rotate the distributor at idole to get the timing correct, do I also rotate the distributor at 6000 rpm, to get the marks to 30 degrees? If I do that, how does it not throw off the timing at idle?
I'm learning and I smell like gas. My wife is going to make me sleep in the garage. Not that I have a problem with that.
Progress. All is much better. Only back fire now is under load, steady state throttle, around 3-4K RPM. Still seems to be a flat spot in the acceleration curve about 4-5K. I'm beginning to understand what I'm doing.
You have the wrong distributor- that is for a 66 or 67 911. The advance curve is wrong.
911T motors have low static compression ratios and a high dynamic compression ratio due to the closing point of the intake valve.
With a large valve, large port motor the volumetric efficiency is not as good at lower RPM. Cylinder filling is not as effective until the higher RPM range-- so you can trigger the spark earlier to generate the peak pressure point at the right spot after TDC.
With the 911T, you have smaller ports and valves, so the VE is better, and you can trigger the spark later i.e. less advance earlier in the curve. Contemporary reports of owners switching the T distributor for the S report more "snap" in the acceleration probably at the expense of detonation margin.
I don't have the T curve on here but this will give you the idea. . . the higher output motors have more advance earlier in the RPM range.
And see this thread for more information about that distributor and to verify the correct order of assembly of the points. There is a paper insulator that must be in place.
http://forums.pelicanparts.com/porsc...electrics.html
1966 911 #304065 Irischgruen
I see on a previous thread that your COA has motor number 6119546, did you check it with the one on your engine case to be sure?
BTW put a few drops of oil on the felt pad under the rotor.
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