Rpm air gap or victor junior

393mark · Aug 1, 2010

mavman said: ↑

you can't compare a 302 based engine with a 351 based engine when comparing intakes. Why? Because the 302 is a shorter engine therefore the intake is narrower therefore the runners are quite a bit shorter than a 351's intake...

now that that's out of the way....

For a street car or street/strip car...the RPM is probably a better bet. The Jr is a great intake by all means-in fact it performs VERY well even down low with a lot of cubic inches. The difference between the two is that the RPM is slightly more responsive to throttle input. At throttle tip-in, the engine will accelerate more crisply. I wouldn't say that the RPM makes more torque but it is definitely more responsive below 2000 RPM. But from 2500-6500 the Jr will outperform the RPM. The super Victor is a good intake but the Jr is a better intake for 99% of windsors-even bigger strokers. Lots of people will fall for the bigger is better deal...and actually the super Victor will make more HP above 7000 RPM than the Jr BUT the overall big picture is what we need to look at. The Jr will make more overall HP than the super victor will unless it's spun in a range from 6500-9000 RPM. And the RPM will make more overall power than the victor jr if you aren't turning more than 5500-6500 RPM (which means most street engines).

I've run both. The Jr did great but the Performer RPM was more responsive below 2500 RPM, got better MPG and with the dual plane I got away with a larger carburetor...which helps upper end HP.

And just for grins I thought it might be neat to post a quick vid...once you watch it, you'll see why I dont run a carb anymore. FYI I'm idling on gas until 1:54 when the methanol is turned on...once it really gets flowing you'll hear the motor settle down & change tone.
http://s262.photobucket.com/albums/ii94/toddh687/?action=view&current=057.mp4

with that setup, the "lack" of throttle response associated with a big single plane is pretty much out the window.
Click to expand...

That engine sounds real good

Log in or Sign up

Rpm air gap or victor junior

393mark Member

Share This Page

Log in or Sign up

Rpm air gap or victor junior

393mark Member

Share This Page

Useful Searches