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Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine> Intake Manifolds Dual plane Vs Single Plane
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Topic Review (Newest First)
08-05-2008 04:00 AM
Silver Shaddow Decide what you want the engine to do, and build it for that.

Was the original poster talking about fuel economy, or absolute flat out top speed at Bonneville, or maybe he is one of those quarter mile drag freaks ?

What will she do mister ? Means a whole lot of different things to a lot of different people.
08-05-2008 03:27 AM
gtgsatellite spiffitz, I like what you say, stay with old school I have a comp cam big and lobitty, works very good!! The same go's for the changing of the timing order.
The ford cams with the same firing order as a Chevy or close to it. The story behind that is more power better idle and on, not true. Recently some well know Motor specialists put out an article in hot rod magazine about this issue. Their conclusion is loss of torque and power, so much for the new style cams of the future. Spiffitz don't get me wrong there is a lot of very good technology to day, some is just bulls---.
08-04-2008 03:37 PM
spiffitz On my 289 I went from a dual-plane F4b-style manifold to a single plane Torker and gained lots of usable low- to mid-range torque on the street, to the point where I was able to use a higher gear to drive some parts of my daily commute. I swapped it for a Performer RPM and gained... nothing. Once my car is painted and on the street I'm swapping the Torker back on.

As a side note, I'm running the Torker Plus cam of yesteryear. I'm wondering what I'd gain by swapping it to the Performer RPM cam. The profiles seem to suggest the RPM cam is more aggressive than the Torker Plus although decades of cam technology might have something to do with that. But heck, an intake swap is cheaper and easier for me at this point.
08-03-2008 07:53 AM
gtgsatellite I have a mustang 302, small motor! my manifold is a 70's single plane torquer!!
Dead stop, I can smoke the tires, 10ms a hour, 20, 30ms, no lag, just instant torque, mid, top end, it doesn't matter. My experience with a single plane torquer is torque, go figure!!!
10-23-2007 05:11 PM
onebadmerc I ran a Torker II on a Ford 302 for years and I really liked it alot. My friend suggest that I switch to a dual plane intake, he said my car would be quicker. Well I bought a Performer RPM and installed it, the intake swap really wasn't worth the time and money. I barely noticed any difference in power, I think that with the power band I was running in and the 4:11 gears out back, swapping intakes was a waste of time for me.
10-23-2007 02:55 PM
Originally Posted by Rick WI
You would likely pick up power above 5000 RPM with a Super Vic style intake. With that cam and wanting to run at the strip it would not be a bad upgrade for those conditions. It will run just fine on the street with that intake, we run them all the time.
Ditto...I run a Vic jr on the street and have for years. It has good street manners IMO. Thats running a 3500 converter and 4.11's.
10-23-2007 01:23 PM
SS66chevelle I have a single plane victor jr. on my 355 powered '65 chevelle conv't (not to be confused with my 66 zz502 hard top, hence the name GLEN anyway, it came on the car when I bought it and it sux.. No power until ~3000 RPM and with a stock low gear and auto trans = snotty rice burner coffee can muffler kid gets you off the line every time. I just ordered a dual plane idle-5800 rated intake. The car is just a cruiser, not a racer but that doesn't mean I can live with seeing the back end of a clapped out 1990 honda either... If you are driving on the street stick with the dual plane.. .
10-22-2007 09:28 PM
chevy_power427 Another thing, my car has a 3.73 gear in the rear, my car rarely runs at 1250rpms i'm always driving at a higher speed, it's not a daily driver, I think I don't even drive it one a week. I could also combine it with a four hole carb space to improve signal to carb. As said earlier, I have a long duration camshaft which is made to match that intake.
10-22-2007 09:21 PM
65 Imp SS I also wondered about the difference. This is from a previous post I had and my own dyno comparison.

"So where was the best power made-Dart or Airgap? I've got a Team G and also an airgap for my 468 and can't decide which I should run..."

I'm not sure of your combination and after having my dyno run (firm believer) it helped in ending speculation. This is what I had posted previously and got the idea for comparison.
"I agree with hotrodf1, I have an old article from Hot Rod november 1990 called "The Lash Word" (yes it's a bbc write up). The 454 engine used was a "Sat. night special" and compared cams (hyd,solid,roller) and also oval port intakes (weiand 8013,torker II,Holley strip dom, Dart). Now the hyd cam was healthy (comp cams 292H) that even at low rpm Dart hp& torq equaled if not bettered the the dual planes.
So when I saw that I decided (with my sat. nite special bbc 427)on my dyno run I was going to compare my edelbrock rpm with a Dart intake (oval port). The Dyno guy figured the rpm would be the only way to go. But after the dyno pulls we were both surprised and he said the Dart was the way to go. With the rpm intake the right and left A/F ratio was off.. Yes staggering the jetting might of worked but the dart was right on. Now every application is different, but after the dyno run it made me a little more open minded."
Now the tq started earlier on the air gap but the peak hp occured about the same rpm as the dart. Air gap 525hp@6400 500#tq@4300rpm. Dart 540hp@6300rpm and 500#tq@4600rpm and again the a/f ratio was off on the air gap. I'm not saying one is better than the other but in my application the dart worked and your results might be different.
10-22-2007 09:19 PM
HammerGVette I have a Edlebrock Torker II on my 350, and I will say; the bottom end is a little saugy, but you can't beat the top end performance. After about 1800 rpm, the single plane really takes into its element. I have the stock heads on the engine at the moment,though. I'm pretty sure with better flowing heads, it just about take care of the issue. It all kinda depends how you drive your car too. Me myself, drive my car like I stole it at every light (gas prices and all). So not having much power at 1000-1500 rpm, doesn't really bother me. Now if your trying to putt around town and keep the car under 2000 rpm, a dual plane is definetly what I would suggest. But what fun is that. That what 4 bangers are for... not your chevy V8
10-22-2007 09:01 PM
chevy_power427 What about vaccuum at idle? Would it drop?
10-22-2007 08:34 PM
baddbob I've run three single plane intakes on 350 and 400 Ci engines on the street with plenty of part throttle power but the RPM airgap is definately a good intake. A Weiand Team G, Victor Jr, or similar would probably shine on your combination considering the 300 duration cam and if the rest of the driveline is matched to higher RPM use. Your idle will also smooth out just a tad.
10-22-2007 08:19 PM
chevy_power427 Thanks, I knew there were people out there with those intakes in the streets.

By the way, I picked out my user name way before I built my motor, it's just because I like to daydream about one in a vette....
10-22-2007 07:46 PM
Rick WI You would likely pick up power above 5000 RPM with a Super Vic style intake. With that cam and wanting to run at the strip it would not be a bad upgrade for those conditions. It will run just fine on the street with that intake, we run them all the time.
10-22-2007 07:21 PM
glen242 Some Things I Wonder:

Why do people with a 355 have a user name of chevy_power427??

Since I don't have a 427 but only a 383 SB, I tend to ignore posts concerning big blocks. Yes I know you can get an aftermarket SB in 427, but if the poster does not have one, why include it in your signature?
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