OK which size of Throttle bodies would you use?

[K-Roc]

Its a 2332 with 48mm intake valves and it makes 235 H.P it runs it's fasted 1/4 miles currently
With 42mm venturies in the 48 IDA's

The obviouse choice would be 42's ?

With a switch to efi what size T bodies would you use? And why?

Will be using Jenveys so the choices are 40, 42,45,48 or 50's

Cheers

[Eaallred]

I'd go 50mm with big valve heads like that. I loved mine with my 48x38 CE's.

[Redline Weber]

The unanswered RPM range question.

I would fit a 58mm butterfly high in the tapered runner.

I would then set the overall trumpet length.

I would then measure MAP pressure (MAX) in the runner at song.

Lance

[Eaallred]

When I was still asperated running a Web251 cam and Redline 50mm ITB's, I would register 7kpa higher than ambient air above 5500 rpm. That's just a hair over 1 lb of 'boost'! Straight IDF manifolds on CE 48x38 heads.

[K-Roc]

Thanks for the replies guys It,s drag race only, 5500-8500 RPM but if was to really put a 50mm or bigger t body on this motor isnt the port velocity going to take a massive nose dive ? As I mentioned above the motor runs its fastest times with 42 vents in the ida,s ( yes it looses power with 44's ......)

I guess the first thing I will do is slap a few combinations of t body bore sizes on the flow bench and measure some velocities with the Pitot tubes, comparing to what we see with the 42 vent ida's and work from there.

Cheers

[shag55]

When I was still asperated running a Web251 cam and Redline 50mm ITB's, I would register 7kpa higher than ambient air above 5500 rpm. That's just a hair over 1 lb of 'boost'! Straight IDF manifolds on CE 48x38 heads.

Nice!
It probably makes best power due to emulsification not air speed. I'd go for the 50s myself.