[Caprimaniac]

Hi, everyone... Hope your racing season have been a success. Mine has been quite so!

Yes, it's me again. And again I want your oppinions.

As I've told elsewhere, I might leave Webers for injection. I have opted for a UK(?) based ECU: Omex 710. Sequential fuel and wasted spark EDIS using an Explorer cam sync sensor (goes in where the distributor used to be...).

Let's say the engine will go full race. Curcuit. Asphalt. (Or maybe not. A street/ race combo is still where I am. Although planning a race car "in my head".)

Should I go for a 4- barrel 1000 CFM throttle body with port- injection, EDL-29285 manifold, or a 4 x IDF throttle bodies w/injectors in barrels & an Inglese IDF manifold?

According to A. Graham Bell's book "Four- stroke performance tuning" (3. ed. 2006) in pages 161 & 163, a setup with 4 x 48mm IDA TB's (1) did make the following power compared to a Vic jr. manifold w/ 1000 CFM 4-b TB (2):

RPM Hp(1) Hp (2) Torque (1) max@5500 378,2
4500 284,9 284,8 Torque (2) max@6000 368,5
5000 311,5 315,0
5500 396,2 378,4 About the same below (1) consistently higher
6000 425,3 421,0 above.
6500 454,5 441,8
7000 439,6 431,3
7500 424,8 400,6

(Hope this comes out OK) All other components are supposed to be identical. (He also have a OE Mustang FOX manifold and a Vic Jr manifold with 750 CFM Holley in this comparison.)

I think (therefore I am): 4- barrel +'s: simpler, less hussle, port injection (?).

IR +'s: Sligthly higher Hp and torque; significantly I'd say? Maybe better throttle response? -'s: More fiddling about & more things can go wrong.

Let's hear what you racers have to say.

RuneS.