I am building a 418 stroker it has canfield 192cc heads 10.5-1 compression comp xe280 solid roller 2500-6500 3.89 gears toploader 4-speed 29 inch tires. 50/50 street strip. RPM AIR GAP OR VICTOR JR . Thanks, Mark
rpm airgap.....seen them dyno more torque in the useable range of your camshaft and barely give up any top end.......unless this is a race only car then I owuld go vic jr and a a diff cam
I have to agree with MAVOWAR on this one. With the EX-280 cam....... you didn't mention what carb you have.............the cam you have just doesn't support the Victor Jr. and certainly wouldn't work with the Super Victor Jr........................I use a Super Victor Jr. on my Race Only Maverick and there is nothing that pulls harder past 7000rpm with the right carb and cam....................... Definately go with the RPM Air Gap.............it should give you better throttle response in your RPM range of 2500/6500.............especially on the street at lower RPM's with the Top Loader...............IMHO
ive ran both on 408 w and i actually ran faster with the rpm air gap, with a 750 cfm carb.if 50/50 i would suggest the air gap hands down. if your planning on spinning motor to the moon then the vic may work better . i agree about the cam the others suggested. its up to you, but i like the air gap.if your going to spray then the vic because its an open single plane where as the gap is dual plane. its your choice.
I run a 94 5.0 motor with 96 explorer heads, F-cam, MSD, 15/8 super comps, 650 proform, and a 5 speed and 4.11 detroit locked 9 in, ran it for years with a vic jr and a best time of 12.28 @ 110.8, finally broke down and bought an rpm air gap and bettered my time to 12.08 @ 112.1, and is allot more responsive, then I bought this cool old edelbrock xf-8 cross ram with two new 450 mechanical holleys and made a best time of 12.32 @ 110.2, now mind this is all over a 5 year period but on a mild motor the rpm air gap is great.
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¤t=057.mp4 with that setup, the "lack" of throttle response associated with a big single plane is pretty much out the window.
Mavman the rpm and the rpm airgaps are different manifolds.....the airgap acts like vic jr with better low end response the reg rpm is a step down in perf.......if seen it on the dyno and dynos do not llie.......I agree with what you are saying if you are saying the rpm is not good enough and to use a vic but with the airgap it bridges that gap!!!! I also like the weiand stealths I would have picked these over the edel rpms intakes untuil the airgaps came out!!!
Agreed. I meant to say airgap...just left that part out a few times. That's what I've used in the past. Had a Stealth on a 514 in my old truck. Kind of "soft", IMO. I liked the regular RPM better on that particular engine.
