Step 1: What engine do I have
 

Hi All,

My car is a 72. I know the following about my engine.

- 71 2.2T - SN 6116669
- Weber Carbuerators
- MSD Ignition
- Runs good
- Leaks a little bit of oil

Could somebody suggest steps to take, part numbers to look at to help me to better understand what I have? Before looking for a different engine or trying to modify this one, it would be helpful to determine what I have now. This engine was in my car when I bought it. I do not what if anything has been done to it.
Thanks!
http://forums.pelicanparts.com/uploa...1163394044.jpg

New guy advice here, but I would think you can find the number under the engine at the bottom of the crankcase directly underneath the sump plate. For instance, mine says 930 110....

Then you can look it up in some books. I found out what my engine was from the number and reading about it in Paul Frere's book in the chapter "Engine Development". I think Bruce Anderson's book also has info.

Good Luck! :)

Nice looking car!

All I can tell from what you provide is that (per the serial number list in Wayne's book) your engine case is one that came with a '71T. From that one can suppose that it might not have been punched out to 2.8 liters. But with the Webers and MSDs someone tried to give it more poop, so it could easily enough have a 70.4mm crank and an S or other performance cam hidden inside. And with a roll bar and rear flares and other bits it looks like it was intended for the track as a DE car.

So how come you learned so little about it? Won it in a poker game, or bought it at an estate sale?

Without fancy tools or disassembling the motor you might learn something by putting it on a chassis dyno to what its torque and HP curves look like.

Maybe someone on this amazing list will know whose car it was and who did the work.

Walt Fricke

As Walt stated, according to the serial number your motor started out as a 71T motor.

You can determine what cams are in there now by reading the profile of the camshaft with a dial gauge. The cams are afterall the thing that really gives the motor most of its' character and is the main difference between the T,E and S motors.

You could also remove one of the intake manifolds to check intake port size. If the ports are 32mm or less then you probably have a T or maybe an E cam. If the intake port is 36mm then you probably have an S cam or something similar. Using the dial gauge however will tell you exactly what cams you have.

If the motor still has the original piston and cylinders then the cylinders would be made of iron and be rusty brown in color. If they are not made of iron but instead made of aluminum then you can assume they are not original. Determining anything beyond that for the P+Cs would be hard to do without a teardown.

Beautiful car by the way. It looks very clean.

nice looking car!

I got my motor info from BA's book. My car is a '70T but has a '72T case and, of cource, 915 trans. in it. PO claimed motor was rebuild with 2.2S pistons, S cams etc. and I will be using the dial gauge method to verify cams when i do my first valve adjustment/oil change etc.

Hi
Nope I sure didnt win the car in a poker game. When I bought the car, I was told that the engine had been rebuilt. The PO did not have any receipts. I also called the shops and asked if they had any records and that did not turn up any information other than what I could see from looking at the engine. When I was redoing the car, the engine was the one area that didnt need imediate attention. I did take the engine out and I was the one who put the MSD on. I never opened it up though.

Sounds like the best thing for me to do would be to put the car on the dyno. From the results, I'll be able to tell if the internals were changed. That way I can still drive it, :-)

Thanks for the compliments, its been alot of work and fun to get the car to this point.
Jamie

Jamie,
Nice car, good luck with it! San Diego is a great place to have a 911, especially on the roads near Julian!