1976 3.0 Euro carrera

[Jim Wolf]

Hello,

I have bought a complete engine (76 Euro 3.0) 930/02.
The CIS system is not in good shape and some parts are missing.
I do have a pair of nice 40 IDA Webers from another engine.
My question is : Will these work in this engine or I have to go for 46s ?
The engine is 100% stock.Do I need also to change my distributor ?

Thank you!
Jim

[Bill Verburg]

40s will be good for most purposes, you will probably want to have the timing curves optimized but it will work w/ the stock distributor.

46s might be ok for an allout race motor but not so good for street use

[Eagledriver]

We have several racers using the 40's and they are great. They lack a few HP above 6000 RPM but only a little. Check your ignition timing at 6000RPM. You can use up to 30 degrees advance at 6000RPM with 91 octane or better. With a good exhaust system you could get 230-240 HP

-Andy

[Bill Verburg]

good point about the octane, my C3 ran fine on unleaded regular, but when that disappeared i had to switch to premium unleaded, at that time it was 94 but I'm sure that was overkill, 91 or 92 sound about right