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Re: Victor 340 vs. RPM Air Gap on a 408****UPDATE****
[Re: emarine01]
#726564
07/19/10 11:29 AM
07/19/10 11:29 AM
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Joined: Jan 2003
Posts: 9,893
Weddington, N.C.
Streetwize
master
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master
Joined: Jan 2003
Posts: 9,893
Weddington, N.C.
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Need a lot of Head/GEAR/RPM/stall for a Vic to show an improvement over an RPM or AG, especially in a heavier car and almost never in an 1/8th mile, motors just not in the sweet spot (above the flash and torque peak RPM)for enough of the time for it to pay off....if you don't have enough cam and head the Vic will never pay off becaue the extra airflow potential it has can never get past the valve.
Does a Victor have more HP potential?....you bet....but only when you got enough motor/rpm to need it. The M1 or old Strip Dominator makes better mid range than a Victor but not as good at the very top of the scale.
With an auto in a 3100 or so pound street car the RPM or Ag is tough to beat, as you get lighter or deeper geared the choice really depends on how much time the motor is over the torque peak.
Last edited by Streetwize; 07/19/10 11:31 AM.
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Re: Victor 340 vs. RPM Air Gap on a 408****UPDATE****
[Re: Locomotion]
#726566
07/19/10 12:11 PM
07/19/10 12:11 PM
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Joined: Aug 2007
Posts: 1,564
St. Clair Shores, Michigan
bigsbigelow
pro stock
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pro stock
Joined: Aug 2007
Posts: 1,564
St. Clair Shores, Michigan
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Quote:
If you are just swapping manifolds without tuning on the jetting and especially the accellerator pump circuit, you are not making a valid comparison. A richer carb set-up will favor the single plane and a leaner carb set-up will favor the dual plane. The question is how is the carb is in relationship to the rest of your engine to start with.
 I don't think you are giving the Victor a fair shot with out tuning the carb.
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Re: Victor 340 vs. RPM Air Gap on a 408****UPDATE****
[Re: Locomotion]
#726567
07/19/10 01:11 PM
07/19/10 01:11 PM
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Joined: Dec 2006
Posts: 1,178
Indy
FlyFish
super stock
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super stock
Joined: Dec 2006
Posts: 1,178
Indy
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Quote:
If you are just swapping manifolds without tuning on the jetting and especially the accellerator pump circuit, you are not making a valid comparison. A richer carb set-up will favor the single plane and a leaner carb set-up will favor the dual plane. The question is how is the carb is in relationship to the rest of your engine to start with.
I may leave the intake on for another go, but…being the skeptic that I am, I don’t think I will be able to get the 60’ times down to the same level as the Air-gap. I would need to pickup ~7 hundredths just to equal the Air-gap. The launch just feels too soft…throttle response is great, it just feels like it is down on torque.
The carb is currently tuned perfectly for the Air-gap, I assume the Victor will want a little more Jet and squirter?
67 Barracuda street car, 408, e85, 1.38 60', 6.44 @105.9 in the 1/8 mile, 10.19 @130.5 in the 1/4...so far....
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Re: Victor 340 vs. RPM Air Gap on a 408****UPDATE****
[Re: FlyFish]
#726568
07/19/10 01:19 PM
07/19/10 01:19 PM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Quote:
Quote:
If you are just swapping manifolds without tuning on the jetting and especially the accellerator pump circuit, you are not making a valid comparison. A richer carb set-up will favor the single plane and a leaner carb set-up will favor the dual plane. The question is how is the carb is in relationship to the rest of your engine to start with.
I may leave the intake on for another go, but…being the skeptic that I am, I don’t think I will be able to get the 60’ times down to the same level as the Air-gap. I would need to pickup ~7 hundredths just to equal the Air-gap. The launch just feels too soft…throttle response is great, it just feels like it is down on torque.
The carb is currently tuned perfectly for the Air-gap, I assume the Victor will want a little more Jet and squirter?
I'm thinking with a DA of +4000 feet that is where your missing power and torque went. Probally needed to lean it down a little because of the bad air.
Too bad you don't know what the DA was the last time you ran the AG.
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Re: Victor 340 vs. RPM Air Gap on a 408****UPDATE****
[Re: FlyFish]
#726571
07/19/10 02:19 PM
07/19/10 02:19 PM
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Joined: Aug 2007
Posts: 1,564
St. Clair Shores, Michigan
bigsbigelow
pro stock
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pro stock
Joined: Aug 2007
Posts: 1,564
St. Clair Shores, Michigan
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Quote:
Quote:
If you are just swapping manifolds without tuning on the jetting and especially the accellerator pump circuit, you are not making a valid comparison. A richer carb set-up will favor the single plane and a leaner carb set-up will favor the dual plane. The question is how is the carb is in relationship to the rest of your engine to start with.
I may leave the intake on for another go, but…being the skeptic that I am, I don’t think I will be able to get the 60’ times down to the same level as the Air-gap. I would need to pickup ~7 hundredths just to equal the Air-gap. The launch just feels too soft…throttle response is great, it just feels like it is down on torque.
The carb is currently tuned perfectly for the Air-gap, I assume the Victor will want a little more Jet and squirter?
Did you swap for a Super Victor or Victor 340?
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Re: Victor 340 vs. RPM Air Gap on a 408
[Re: justinp61]
#726575
07/19/10 03:05 PM
07/19/10 03:05 PM
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Joined: Jan 2003
Posts: 11,730
Portage,michigan
B3422W5
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 11,730
Portage,michigan
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Quote:
What was your normal 60' in the heat with the Air Gap? My Dart with a pump gas 340, hydraulic cam, ported Edelbrocks, Weiand X-Celerator, 4.30 gears, at 3300# went a best 1.530 60' and would go 1.55-56 in the heat.
The 10.9-1 408 in it now with the same heads, flat solid cam has gone 1.41 untuned with a Victor on it.
IMHO the X-Celerator is a very underated intake, I've seen them run hard on 340/360s and strokers too.
Couldnt agree more about the excellerator, great intake that is way underated 
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight
418 BPE factory replacement headed stroker, 565 lift solid cam
Best so far, low 10.30’s 1/4
1.41 best 60 foot
6.56 at 104.17
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Re: Victor 340 vs. RPM Air Gap on a 408
[Re: justinp61]
#726576
07/19/10 03:17 PM
07/19/10 03:17 PM
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Joined: Dec 2006
Posts: 1,178
Indy
FlyFish
super stock
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super stock
Joined: Dec 2006
Posts: 1,178
Indy
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Quote:
What was your normal 60' in the heat with the Air Gap? My Dart with a pump gas 340, hydraulic cam, ported Edelbrocks, Weiand X-Celerator, 4.30 gears, at 3300# went a best 1.530 60' and would go 1.55-56 in the heat.
The 10.9-1 408 in it now with the same heads, flat solid cam has gone 1.41 untuned with a Victor on it.
IMHO the X-Celerator is a very underated intake, I've seen them run hard on 340/360s and strokers too.
On “normal” hot summer days it would run 1.53’s in the 60’ with the Air-gap….also, your car has a very similar combo (except a bigger cam and carb), but it goes ~3 tenths faster than my best (6.61 IIRC)…..weird huh?
67 Barracuda street car, 408, e85, 1.38 60', 6.44 @105.9 in the 1/8 mile, 10.19 @130.5 in the 1/4...so far....
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Re: Victor 340 vs. RPM Air Gap on a 408
[Re: Scamp408]
#726578
07/20/10 09:55 AM
07/20/10 09:55 AM
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Joined: Dec 2006
Posts: 1,178
Indy
FlyFish
super stock
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super stock
Joined: Dec 2006
Posts: 1,178
Indy
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Quote:
Was any porting done on the victor?
Mine needed work right off the bat.The ports were smaller than a 318. I picked up 3 tenths switching a torker 2 to a victor and the torker had work on it also.
Yes, I port matched both the Air-gap and the Victor...The Victor needed more work, but looked good when I finished up.
I think I'll leave this intake on till fall, but if it doesn't pick up a LOT in the cool weather, it's coming off.
67 Barracuda street car, 408, e85, 1.38 60', 6.44 @105.9 in the 1/8 mile, 10.19 @130.5 in the 1/4...so far....
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