Camshafts and pistons

[M491]

Hello! I was wondering if camshafts with the part number "901 105 183 OR" and a Bosch distributor with the part number 0.231.169.011 are OEM 911S parts. Any advice would be greatly appreciated.

Also, I was wondering if anyone might know what effect rebuilding a 911T 2.4 engine with 2.2 911E pistons and camshafts would have. Would this be a positive step in terms of performance and compression? I know 2.2S pistons would lincrease the compression substantially from the stock 7.5 of the T pistons.

Another option I have instead of the 2.2E pistons is to use 2.4 911S pistons and E camshafts. I also have the above cams, but am afraid the drivability (99.9% on the street) would suffer. Anyway, I don't know which would be better.

Also, would the use of the above distributor on my stock or modified 911T engine provide any improvement?

Final question... Would any of the above modifications on a engine needing a rebuild anyway negatively impact the value of my 1972 911T coupe?

Any help would be greatly appreciated! Thanks in advance.

[Richard]

Either the 2.2E pistons or the 2.4S pistons should work fine. The longer stroke of your 2.4 motor will up the compression of the 2.2E pistons from about 9.1 to something like 9.6. The stock 2.4S pistons are 8.5 to 1 CR. The E cams will also work fine. The one issue you may have a problem with is your T injection pump. You may or may not be able to richen it up enough to work with the E cams. My guess is that it will work with some tuning...if not your injection pump will have to be rebuilt with an E space cam. The intake ports are smaller on your T motor than on either a 2.2S or 2.4S motor. This will cost you a little high RPM performance but for a street car they will be fine. Many years ago I put 2.4S pistons and cams in a 2.4T. I had to have the injection pump rebuilt to S specs to flow enough fuel, but I never enlarged the ports or throttle bodies on the injection stacks and the car ran great.