Weber Conversion

I have an '83 engine that was converted to Webers 46IDA. I thinks it was a 3.0L but I am not sure. I do not know what type of cams it has although they are timed like standard cams. The head has been polished and ported. It has SSI headers. The distributor has been recurved by a company recommended by PMO in California. I have a Permatune ignition and recently have changed the coil to a "Jackobs Coil". The Webers have been rebuilt although one of the throttle shafts is rattleing. I have some of the teflon bushings that go around the shaft but I can't get it around the shaft and in the hole. Anyway, the car runs pretty good but I do not really know what the engine has and what it is capable of. It sounds really good but it seemes like it is not tuned right. It has good low end pickup but I cannot notice a powerband. I do not notice more horsepower when it hits 4K rpms. There is only one person in town that really knows about this kind of engine but he really doesn't care to work on it. I guess an '83 is too old for him ans with no prior history to the engine (since I bought it used) it is not worth his while. Do you have any advice? How can I find out exactly what I have without spending to much? Any literature on the correct Weber conversion setup and compatiblilities?

Thanks
David

See page 143 in B. Andersons' book "911 Performance Handbook", Sounds to me like this is the conversion he describes...I run Weber 40's on my 2.7, the smaller venturi's seem to work better on a street car...But I know several people running 46's on 2.7 to 3.2 L motors...The only way you can tell whats really in your motor is to go inside and see..You might have someone do leakdown/compression tests..to determine basic integrity of motor...If you have someone work on Webers (throttle shaft), they can tell you what venturi, main jets, idle jets etc. that you have, also, you can play with cam timing, but this is better left to someone that has some experience...if you don't have Hydraulic tensioners that would be the time to convert, all in all I would probably leave everything alone until you have a problem...If it ain't broke...Sean

[Wayne 962]

The 3.0L basically has similar power to the 2.7 motor, but it has a bunch more low-end torque. The power curve for the 3.0L is pretty even - more so than for other motors.

-Wayne