I'm contimplating replacing my Performer RPM with a Victor Jr. I'm at about the 450hp mark, so I think I need to step up a bit, plus a Victor Jr. is just so much cooler lookin:) The problem is I drive my Nova everyday, and the Victor Jr. is a higher RPM manifold. If I used 1/2" 4 hole spacer, and built a devider plate for the Victor Jr. how much would this lower the power band? BTW, this is on a 385 cubic inch motor not a 355. Also, is the Victor Jr. any taller than an RPM? My air cleaner is about 1/8" from my hood with a 1/2" spacer currently so I can't go any higher. Thanks, Scott

Don't do it! You already have the right manifold on your combination...a Vic jr will do nothing for your combination other than reduce torque and slow your car down and lose driveability.

If you want a trick looking manifold, put a RPM air gap on there, but performance wise, it's the same as the one you have, so in the end, keep what you have.

What makes you think at 450hp you need to "step up" in the manifold department?

IMO, the RPM is fine even to the 500-550hp level.

I switched from an RPM manifold to a VicJr and it made no difference at all.

I believe 40Coupe went from a vic jr to the air gap and picked up a tenth or so,his vic jr is for sale.

How much does the guy with the 40 coupe want for his vic jr. (rapid robert)? I am in the market for one. Thanks.

You've got mail...sobever066

I tried a Vic jr and a dart dual plane on my 405 motor when it was dynoed. The dual plane made quite a bit (40-50ft/lbs) more torque in the 3000-4500 rpm range, was about even from 4500-5500, and finally made more power from 5500 on up. The horsepower peak was basicly the same (440hp@5300) with either intake.

Sorry, the vic jr made more power above 5500rpm. My motor is mild and was built for midrange power. If I stepped up the cam and converter, I would go with the single plane.

The main reason I wan't to get rid of the RPM is when you look down into it, the air/fuel mixture has to make a couple turns before it gets to the head, with the Victor Jr. it's pretty much a straight shot, or a large swooping radious. This has to make more power than the RPM from like 3,500 & up. When I go to the race track my converter flash's to 2,900, so I don't need much torque to get to the power band. An RPM is rated at 1500-6500rpm for a 350 Chevy, so the fact that I have 30 more cubic inches knocks off a few hundred rpm. A Victor Jr. is 3500-8,000 for a 350 so between having 30 more cubes, a 4 hole spacer, and making the intake dual plane I would think it would be pretty killer for a hi-po street car and at the race track shifting at like 6,200rpm's. Has anybody stuck a devider in one of these?

Originally posted by 19Nova72:
The main reason I wan't to get rid of the RPM is when you look down into it, the air/fuel mixture has to make a couple turns before it gets to the head, with the Victor Jr. it's pretty much a straight shot, or a large swooping radious. This has to make more power than the RPM from like 3,500 & up. When I go to the race track my converter flash's to 2,900, so I don't need much torque to get to the power band. An RPM is rated at 1500-6500rpm for a 350 Chevy, so the fact that I have 30 more cubic inches knocks off a few hundred rpm. A Victor Jr. is 3500-8,000 for a 350 so between having 30 more cubes, a 4 hole spacer, and making the intake dual plane I would think it would be pretty killer for a hi-po street car and at the race track shifting at like 6,200rpm's. Has anybody stuck a devider in one of these? My suggestion is,,, don't try to reinvent the wheel :D
The RPM & RPM air gap have been shown time & again to outperform the vic below about 4000 & be very close to even to almost 6500 with some exceptions.
There is more to intakes than looking down the thing & there is a reason the RPM has longer runners.
It is a very hard intake to beat to about 6000 in most cases on a street driven small block ;)
You are going to put a pretty good sized hole in your torque curve at 3000 with the Vic & you might gain a little HP above 6000
Now, how long are you between 3000 & say 5500 & how long are you above 6000??
Just my thoughts ;)

Ok, I'll follow your guys advice and keep the RPM. You never know I could start the next hottest street intake trend if I fooled around with the Vic though ;) I do have another question, do you think I need 3" exhaust yet or will I just loose so much low end that it won't be worth it?

Originally posted by 19Nova72:
You never know I could start the next hottest street intake trend if I fooled around with the Vic though ;)

:rolleyes: The Vic Jr WAS the hot ticket...

about 6 years ago smile.gif

I'm in need of a vic JR # 2975 if anyone has one for sale. I have a 3 mo. old performer RPM that works great. The problem i have is i want to spray 250 this next summer and NOS and NX both say no more than 150 on the dual plane.


Please let me know if someone has one for sale or trade.

BTW. i have a basically brand new RPM for $90.


Mike.

e-mail me at hardinm@sjrmc.com