302 tuning help!!!!

[blackmag17]

<!-- / icon and title --> <!-- message --> 48 IDA's are new to me, and I need some help tuning them. My car is running rich, all the plugs are black. And it lacks power. These are my engine specs:

302ci, 9:1 compression, steel heads: 1.940 intake/1.600 exhaust, solid lifter, duration= 0.050 @ 236, 0.528 lift, 110 lobe separation, 106 intake center line

Webers: 37mm, 150 main jet, 200 air jet, F7 emmulsion tube, 120 idle jet holder, 65 idle jet, Inglese 3 1/8" velocity stacks with nylon booties

I need to get the car running well so I can see what this motor can really do!!! Any help is much appreciated.
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http://www.clubcobra.com/forums/editpost.php?do=editpost&p=888418

 

[Randy V]

JacMac would probably have some good information for you in regard to tuning the Webers themselves.

From my perspective, you have a LOT of camshaft for a relatively small engine with a pretty low compression ratio. I don't think that you'll be anything but marginally successful in a Weber tune that works well with your cam/compression combination.
I would find a cam that has 112 LC or greater in order to reduce intake reversion that kills Webers on the lower end of the RPM scale.

 

[Jac Mac]

Will get back to you on this- is it a Comp Cams 282S grind, is it in a 40 with crossover exh, and what initial & total ign timing are you running.

As Randy has pointed out you will have added a degree of difficulty with the 110LC.

 

[Terry Oxandale]

Just out of curiosity (based on the response), suppose this very same cam was being used in a 383 CID displacement motor. Would this be more acceptable to the Weber induction system.

 

[Randy V]

Just out of curiosity (based on the response), suppose this very same cam was being used in a 383 CID displacement motor. Would this be more acceptable to the Weber induction system.

The larger the displacement the more air it's moving and hence a better vacuum signal (which carbs need to function - remember they are pressure differential devices)...

So - In a word - YES.

It is a little more complicated than that though.. It all boils down to the design (components & parameters) of the engine and purposes it is intended for..

 

[blackmag17]

Will get back to you on this- is it a Comp Cams 282S grind, is it in a 40 with crossover exh, and what initial & total ign timing are you running.

As Randy has pointed out you will have added a degree of difficulty with the 110LC.

Yes, it is a Comp Cams 282S grind. It's in a Mustang with a H-pipe. And the timing is at 14, but I don't know what the total timing is at. What do you recommend?