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Author
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Topic: RPM Air-Gap to Victor Jr swap results
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Jerry Piner
Gearhead Posts: 257
From: staunton, va
Registered: Dec 2001
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posted 09-12-2005 10:46 AM
 
Well after much debating back and forth I finally broke down and ordered a victor jr intake about 5 weeks ago. Well Saturday morning i got up and finally put it on.
We raced both friday and saturday this week instead of just friday.
Had a bunch of people tell me it would run faster with the Victor.
Well it ran the same with the victor as it did with the air-gap. The strange thing is that it felt like it left harder with the victor the 60 ft didn't show it but it felt like it in the car, which i found strange since the dual plane is suppose to be more for low end.
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Dave_C
Gearhead Posts: 1123
From: Gadsden, Al
Registered: Aug 99
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posted 09-12-2005 11:55 AM
Jerry,Are you still running the stock iron heads? If so, there is your bottleneck. The stock 351 W heads will never flow enough to take advantage of the Vic Jr. You REALLY need to put some aftermarket heads on that engine. It will wake it up. Even some lower end heads heads like World Products or Edelbrock Performer Rpm heads would do wonders for it. I put a set of out-of-the-box stock Performer Rpm heads w 2.02/.160 valves on the 302 I built for my brother's 66 Mustang. With an RPM intake, Comp 282S cam and 750 Dp it's now running 7.40's on engine and 6.90's on a little spray. And that's not beating on it. David Cole ------------------
557 BBF Powered, alcohol injected rear engine dragster. 4.88 @ 143 1/8 mile. 1.09 60'. I've got to be crazy to drive this thing.
SC/ET #2729
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Jerry Piner
Gearhead Posts: 257
From: staunton, va
Registered: Dec 2001
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posted 09-12-2005 01:49 PM
Yeah still running stock heads. I had actually thought about getting a set of the RPM heads with the 1.90 valves the flow numbers are almost the same and I figured there would be less p/v problems.
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V8 Thumper
Gearhead Posts: 4777
From: Phoenix, Arizona
Registered: Dec 2001
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posted 09-12-2005 01:58 PM
I'll just add this:I've recently swapped from an Airgap to a Vic Jr. Haven't made it to the track yet, but there is an unmistakable increase in the motor's output, especially high up in the powerband (shift at 7k rpm). Sroker motor with good heads and good internals mind you, but I'm 100% certain that if nothing else I'll see higher trap speeds when the weather cools off enough here to get back to drag racing. Heck, et might decrease some since my 60' times suck; Vic Jr. may soften the hit to the tires below 4k rpm. Probably not, but I can hope, can't I?  ------------------
1965 GT coupe, 333ci aluminum headed/solid cammed stroker, four speed, 3.70:1 9" 12.58/110 on street tires, more to come;) All Blue Oval, no blue bottle
http://mustangsandmore.50megs.com/V8Thumper.html
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Jerry Piner
Gearhead Posts: 257
From: staunton, va
Registered: Dec 2001
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posted 09-12-2005 02:09 PM
Well we ran points friday and saturday this week and everyone was running the same or 1 number either way saturday as the were friday night. Well friday night best pass 1.65 7.72 88.3 MPH saturday 1.65 7.72 88.4 MPH.
Ran same jetting and same 1" 4 hole spacer with both. [This message has been edited by Jerry Piner (edited 09-12-2005).]
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Rory McNeil
Gearhead Posts: 1889
From: Surrey, B.C. Canada
Registered: Nov 2000
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posted 09-12-2005 02:56 PM
Although I run a FE428 in my Fairmont, I too have been less than overwelmed by the Victor series intake. My 428 has basically stock 428CJ iron heads on it, & a solid lifter cam, and has gone a best of [email protected], using an "antique" factory Ford 427 single 4 barrel aluminum "Sidewinder" dual plane intake. The Sidewinder has been gasket matched to the stock CJ head ports, and has the center divider cut down. When the new Edelbrock Victor single plane manifold was announced for the FE engine, I had to get one, after 8 months on backorder, & $500.US later, I had the swoopy looking race intake on the 428. After most of the season last year, the Victor has yet to run as fast as the almost 40 year old Ford manifold. It`s not a LOT slower ([email protected]), but still, it IS slower. The 60 foot numbers stayed about the same ( mid 1.3`s), and the MPH numbers did not increase at all. Maybe with a big roller cam & 7000 +RPM, the Victor MAY be better, but so far, it ain`t.------------------
78 Fairmont 428 4 speed [email protected] 1.32 60 foot
80 Fairmont 302 5 speed 12.8@105mph
85 Mustang NHRA M/Stock 302 5speed. [email protected] 1.63 60 foot
59 Meteor (Canadian Ford) 2 dr sedan 332, auto
74 F350 ramp truck 390 4spd
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69 Sportsroof
Gearhead Posts: 2814
From: Valley, Alabama, USA
Registered: Mar 2002
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posted 09-12-2005 03:45 PM
I was under the impression that the spacer needed to match the intake. If you have an open plenum intake such as the vic jr. shouldn't you run an open spacer instead of the 4 hole?
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Ryan Wilke
Gearhead Posts: 3237
From: Stanton, Michigan, zip 48888
Registered: Oct 2000
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posted 09-12-2005 03:56 PM
Jerry,
Is there much difference in the fit at your cylinder heads between the AirGap intake and the Victor intake -do they "gasket-match" to the heads about equally? The example that Dave_C provided was using Edelbrock heads, do ya think they may have a better gasket-match fit to the edelbrock Victor intake than to the FoMoCo castings? V8T,
What heads are you running - did you gasket-match them to your Victor? Rory,
You said that you gasket-matched the 428 FE heads to the Ol' FoMoCo intake.... did you also gasket-match the Victor to the heads? We know the Victor is a high-winding intake, at what RPM are you launching & shifting at?
Just wonderin'/thinkin' out loud,
Ryan 
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Jerry Piner
Gearhead Posts: 257
From: staunton, va
Registered: Dec 2001
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posted 09-12-2005 04:07 PM
I footbrake to about 2700 and shift at 6000 but my converter flashes to about 4800 on launch and doesn't drop below that on shifts.
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Rustang
Gearhead Posts: 880
From: Clarion PA
Registered: Nov 2000
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posted 09-12-2005 04:14 PM
quote:
Originally posted by Dave_C:
Jerry,Are you still running the stock iron heads? If so, there is your bottleneck. The stock 351 W heads will never flow enough to take advantage of the Vic Jr.
Just remember it's not just about quantity of air but also quality  My old C9 heads responded well with the Vic Jr. Although I ran the vic when the motor was old and tired, (leakdown around 15-20% on most cylinders) it still ran as quick as it did with a much-modified street dominator when the motor was in it's prime.
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'68 mustang 351 clevor- 10.92@124
'67 Stang, 351W -11.18@118
'69 351C Torino-14.90@100
'78 Pickup 351W-15.56@88
'79 Pickup 460 ET=??
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stroker man
Gearhead Posts: 404
From: Denville NJ USA
Registered: Mar 2002
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posted 09-12-2005 07:33 PM
on my old 402w i had the stealth with my old sr heads it was ok but when i updated my heads roush200 ported and put on the vic jr it was light nite and day, car is a rocket out of the hole and mid range is awesome.
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Rory McNeil
Gearhead Posts: 1889
From: Surrey, B.C. Canada
Registered: Nov 2000
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posted 09-12-2005 07:36 PM
Rory,
You said that you gasket-matched the 428 FE heads to the Ol' FoMoCo intake.... did you also gasket-match the Victor to the heads? We know the Victor is a high-winding intake, at what RPM are you launching & shifting at?
Just wonderin'/thinkin' out loud,
Ryan [/B][/QUOTE]
Ryan, no I had not port matched the Victor, I just stuck it on "out of the box" as it arrived late in the season. When I put the Fairmont back together I will do a port match. As for RPM, I normally dump the clutch at 62-6400 rpm, and shift at 6000-6200, on a strong pass, it would be hitting 66-6700 rpm thru the finish line. Higher shift points didn`t net any better numbers.
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78 Fairmont 428 4 speed [email protected] 1.32 60 foot
80 Fairmont 302 5 speed 12.8@105mph
85 Mustang NHRA M/Stock 302 5speed. [email protected] 1.63 60 foot
59 Meteor (Canadian Ford) 2 dr sedan 332, auto
74 F350 ramp truck 390 4spd
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