Smallblock intake manifold shootout.

-
340 Dart

340 Dart

I don't know ****.
Joined
Feb 5, 2007
Messages
2,358
Reaction score
30
Location
San Antonio
I remember reading about one of these a while back and cannot find a link.
Did anyone save it?

I need to compare HP and TQ for a performer, a RPM airgap, and a Weiand accellerator.
 
The Airgap wins hands down. From low end torque to top end horsepower. Try Moparmusclemagazine's website. They done the test.
 
Air Gap

airgap.jpg
 
fishy68 said:
What do you consider better? And for what usage are they, i.e. street/strip or race only.
Click to expand...
a little old 25 year old design comes to mind, Holley Street Dominator. the name implies the usage. also the Victor 340 is a kickass one too. has terrific street manners.
 
360Z28 said:
a little old 25 year old design comes to mind, Holley Street Dominator.
Click to expand...

I just made a post on this manifold. Single plane and great low end torque. I had one on a Ford build I did years ago and was totally impressed. Never seen them compared on a dyno though...
 
I hope somebody does come up with a link to the article. I'd love to see it. I saw an article in a Chevy high perf. mag. recently that tested a bunch of manifolds and the Air-gap pretty much crushed the opponents. They did the test with 2 different cams too. A mild street cam and a pretty aggressive roller. Even with the big cam the Air-gap did better than any other manifold below 5500 rpm. Only a few made more power above that and even then the diff. wasn't much.
 
I currently have all 3 of these plus a cast iron factory one from a 360.

I need one for my 318, one for my 340 and one for the 360. I can find a decent shootout for big block intakes, but nothing for a smallblock yet.
 
ramcharger said:
I just made a post on this manifold. Single plane and great low end torque. I had one on a Ford build I did years ago and was totally impressed. Never seen them compared on a dyno though...
Click to expand...
I ran one for years on a 71 340 it was great for low end but is short and small port so top end was realy lacking.
The same goes for performer intake both have smaller ports like a 318 head good for "street use" on 340-360
 
Oh yeah, if you do get a Weiand intake make sure it fits your motor before anything else! The last one I got for a 360 only one of the bolts lined up with the heads, a few were at least 1/4 inch off and the casting was so bad that it cut my finger when I rubbed it. I have heard other horror stories about their Q.C. They must have gone to the Barry Grant school of quality control.
 
340six said:
I ran one for years on a 71 340 it was great for low end but is short and small port so top end was realy lacking.
The same goes for performer intake both have smaller ports like a 318 head good for "street use" on 340-360
Click to expand...

The engine I used it on was a Ford 400M and it just sang at 6000 rpm. It was tall enough that I had to use a scoop on my Torino with a drop base Moroso air cleaner. This is obviously an apples to oranges comparison though as I was using closed chamber Australian 351 Cleveland heads. These heads are splay valve and a "semi hemi" configuration and the ports/valves are huge compared to chevy or Mopar heads.
 
360scamp said:
Oh yeah, if you do get a Weiand intake make sure it fits your motor before anything else! The last one I got for a 360 only one of the bolts lined up with the heads, a few were at least 1/4 inch off and the casting was so bad that it cut my finger when I rubbed it. I have heard other horror stories about their Q.C. They must have gone to the Barry Grant school of quality control.
Click to expand...

I've got a Weiand Action+ on my RC and it fit beautifully and the casting quality was second to none. This was a used piece of unknown vintage from another member though, so as you say, quality control may have gone down hill....
 
I've had my Weiand accelerator about 5 years. It started on an old 318 build then ran on a 360 for 4 years. Got my old Dart into the 12.9's. It is on my new 340 in my Duster now but I just got a good deal on an RPM Airgap and wondered it it is worth changing it out. 5HP I am not going to sweat, but if I am giving up 10-15 in TQ it is probably worth thinking about.
 
First off you should'nt be comparing any single plane intake to the air gap its a dual-plane..Secondly i don't really read much into what magazines say,they're trying to sell their product..as for me i run the Air Gap on my stroker and 360 it flat out works i've got time slips to prove it,and thats all that counts..:-D
 
Well said stroked 340. Another point I would like to , point out is that the intake shoot outs were on a specific engine combo and all the intakes were tried out on it. This is a problem. The lower performing intakes, like Edelbrocks Performer should not have been on top of he engine. While it didn't perform to badly, it was giving up alot of power. The test showed this and , well, I guess it was good they showed it so you yourself do not leave power on the table.

I have the article saved on paper. I just do not remember ANY Weiands used in the shootout test. I'll double check in a few. But I would make a comaro of it to the Torker II they used.

A single plane in the street needs alot of stall converter and gear to be able to compete with a well done dual plane intake set up. If you can't get a set up where the stall converter and gear come into play at approx. around 3500 - 4000 rpm, a dual plane is a better bet.
 
360scamp said:
Bad idea, we have gotten in trouble in the past from Mopar mags due to copyright issues. Your best bet is to email it directly to the people that want it.
Click to expand...

Wow,in my internet searching I see lots of scanned articles but I guess its no suprise considering the corprate world we live in.
 
stroked 340 said:
First off you should'nt be comparing any single plane intake to the air gap its a dual-plane..Secondly i don't really read much into what magazines say,they're trying to sell their product..as for me i run the Air Gap on my stroker and 360 it flat out works i've got time slips to prove it,and thats all that counts..:-D
Click to expand...

i've never seen a drastic improvement in ET with ANY intake swap (other then a T-Ram. those things just flat out haul ***), thats only happens when you upgrade the rest of the components. BUT.. I'll put up the LD340 (nutter 30+ year old design) against the Performer RPM AirGap any day of the week. theres your DP vs DP comparison. so on a modded enigine IMO this is the pecking order for horsepower and torque:

1. Tunnel Rams (mopar M1)/crossrams (edelbrock STR)
2. pure Race Single plains (Edelbrock Victor/ Holly Strip Dominator)
3. LD340/Performer Rpm/Holley Street Dominator
4. street single plains
5. Six Pack
6. street dual plains/stock TQ's

feel free to add others

cheers
 
BUT.. I'll put up the LD340 (nutter 30+ year old design) against the Performer RPM AirGap any day of the week.
Click to expand...

This coming from a guy that was running a MOPAR in a CHEVY:angry7::angry7:!!!
 
Well, you gotta give him credit; at least, he got the ENGINE right!!! :cheers:

A couple of years ago, I saw a manifold test in a magazine (Car Craft, I think) in which they tested several manifolds on a dyno mule (360, moderate hop-up) and the manifold that made the most horsepower was an M-1 single-plane, but it only beat the Eddy Air Gap by ONE horsepower, and gave away a bunch of mid-range torque in the bargain. Not a very good deal....
 
Good point Bill. Right intake for the right job.
 
and the manifold that made the most horsepower was an M-1 single-plane, but it only beat the Eddy Air Gap by ONE horsepower, and gave away a bunch of mid-range torque in the bargain. Not a very good deal....
Click to expand...

And thats why theres a 'air-gap" on my street/strip car..good street manners,runs 11's at the track:cheers::cheers:
 
You must log in or register to reply here.
-

Back
Top