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Which intake is better flowing? #1274455
07/26/12 01:34 PM
07/26/12 01:34 PM
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Elk Grove, Calif.
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bigblock340power Offline OP
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This is between the LD340 and the M1 intakes. As purchest, Stock configurations. Don't want to hear about what is better out there, just these two.
Thank you.

Which one's better flowing
single choice
Votes accepted starting: 07/26/12 12:32 PM
You must vote before you can view the results of this poll.
Re: Which intake is better flowing? [Re: bigblock340power] #1274456
07/26/12 09:25 PM
07/26/12 09:25 PM
Joined: Jan 2003
Posts: 28,600
Shopping @ HoBo Fright
340SIX Offline
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Shopping @ HoBo Fright
Ld-340 is my vote over the duel plane M1
Don't they make 2 kinds of M1 one duel plane and one that is open
I like this better than all the rest but maybe it was due to getting to know it well. I held it quite awhile sanding and polishing it so we are friends now


[img]https://i234.photobucket.com/albums/ee87/fast340six/sig%20pics/2840886-340SIX-1.jpg[/img]
VP of the MPM in New Orleans
73 Dart Sport 340/ 70 challenger vert. That may still get built, If I live long enough
Re: Which intake is better flowing? [Re: bigblock340power] #1274457
07/27/12 02:42 AM
07/27/12 02:42 AM
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Not2farfromNashville, TN
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Not2farfromNashville, TN
We have a new forum here. It's for asking tech questions about MOPARS! I found it last week!


"The only thing to do for triumph of evil is for good men to do nothing"

"NUNQUAM NON PARATUS!"
Re: Which intake is better flowing? [Re: 340SIX] #1274458
07/28/12 10:20 AM
07/28/12 10:20 AM
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Elk Grove, Calif.
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bigblock340power Offline OP
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Don't they make 2 kinds of M1 one duel plane and one that is open.



Both intakes I have are duel plane. I guess I should have said that. I'm replacing the open plenum M-1 I have on there now.

Re: Which intake is better flowing? [Re: bigblock340power] #1274459
07/28/12 11:12 AM
07/28/12 11:12 AM
Joined: Dec 2010
Posts: 1,035
Missouri U.S.A.
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71yelladustr Offline
super stock
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FWIW, I had both intake manifolds on my 73 340 Dart sport and the LD340 ran the best. This was on a 10 to 1 engine with a .484 purple shaft otherwise bone stock. It picked up .25 sec in the 1/4 and a couple MPH. The M-1 is basically a aluminum version of an early 340 manifold. Now the M-1 single plane is a different story, When I bumped the compression and added more cam along with some head work it trumped the ole LD340


392 gen III hemi on E-85 727 trans Dana 60
10.02@134
Re: Which intake is better flowing? [Re: bigblock340power] #1274460
07/28/12 11:13 AM
07/28/12 11:13 AM
Joined: Jun 2004
Posts: 1,629
wilmington,ohio
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ohiodemon Offline
top fuel
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wilmington,ohio
ld-340 is a time tested intake.
on your engine i'd be thinkin about the air-gap.

Re: Which intake is better flowing? [Re: 71yelladustr] #1274461
07/28/12 11:56 AM
07/28/12 11:56 AM
Joined: Jan 2003
Posts: 27,468
So Cal
autoxcuda Offline
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So Cal
Quote:

.... Now the M-1 single plane is a different story, When I bumped the compression and added more cam along with some head work it trumped the ole LD340




Seems like he has a single plane M1 on there now.

Curious to why the move to dual plane. Engine specs?

Also curious about the results.

Re: Which intake is better flowing? [Re: 71yelladustr] #1274462
07/28/12 07:51 PM
07/28/12 07:51 PM
Joined: Jan 2003
Posts: 5,894
Florida
Locomotion Offline
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Florida
Quote:

FWIW, I had both intake manifolds on my 73 340 Dart sport and the LD340 ran the best. This was on a 10 to 1 engine with a .484 purple shaft otherwise bone stock. It picked up .25 sec in the 1/4 and a couple MPH. The M-1 is basically a aluminum version of an early 340 manifold. Now the M-1 single plane is a different story, When I bumped the compression and added more cam along with some head work it trumped the ole LD340




with what he said.

The M-1 dual plane would work best on a mild, street only small block. I compared a Weiand Stealth, which appears very similar to an LD-340, to a Holley Strip Dominator (very similar to the single plane M-1) on my race-only combo and the Weiand dual plane was only about a tenth slower than the single plane Holley. But I have a lot of gear, converter and cam duration, which stays over 5,000 rpm once the converter flashes, and the single plane liked it better. I figure for anything less, the LD-340 should be better overall. Of course, carb tuning will be different and will be a factor in the final results.

See if the LD-340 will like 2 jet #'s leaner on the shallow plenum side or 2 #'s richer on the deeper plenum side. Jet for MPH and squirters and pump cams for 60'-330' times.

Re: Which intake is better flowing? [Re: autoxcuda] #1274463
07/29/12 12:10 PM
07/29/12 12:10 PM
Joined: Aug 2004
Posts: 8,087
Elk Grove, Calif.
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bigblock340power Offline OP
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Quote:

Quote:

.... Now the M-1 single plane is a different story, When I bumped the compression and added more cam along with some head work it trumped the ole LD340




Seems like he has a single plane M1 on there now.

Curious to why the move to dual plane. Engine specs?

Also curious about the results.






Going back to the duel plane for better streetability. Think I'm going with a vac. secondary 750 holley too. Just making it a cruser. Already changed out my torque converter to a more streetable setting, and my rear gear is now 3.23's down from the 3.91's. Looks like I might be building my stock motor again, and putting it back in (sometime in the near future). That's all.

Re: Which intake is better flowing? [Re: bigblock340power] #1274464
07/29/12 01:55 PM
07/29/12 01:55 PM
Joined: Jun 2005
Posts: 4,041
michigan woods
imfixinmopars426 Offline
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michigan woods
forget either,and get a eddy rpm air gap,best intake i have ever used.

Re: Which intake is better flowing? [Re: imfixinmopars426] #1274465
07/29/12 02:24 PM
07/29/12 02:24 PM
Joined: Feb 2009
Posts: 1,274
Ontario.Canada
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can.al Offline
pro stock
can.al  Offline
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Ontario.Canada
..how did you compare them to each other?

Re: Which intake is better flowing? [Re: can.al] #1274466
07/29/12 02:58 PM
07/29/12 02:58 PM
Joined: Apr 2005
Posts: 12,271
Overpriced Housing Central
RobX4406 Offline
I Live Here
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Overpriced Housing Central
Flow is VERY misleading when picking an intake.

Of the two run the LD340.

Re: Which intake is better flowing? [Re: imfixinmopars426] #1274467
07/29/12 05:07 PM
07/29/12 05:07 PM
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Elk Grove, Calif.
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bigblock340power Offline OP
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Quote:

forget either,and get a eddy rpm air gap,best intake i have ever used.








Thank you for you opinion, I'm sure it's a very nice intake but as I said in the begining of this post: "Don't want to hear about what is better out there, just these two (LD340 & M-1 duel plane)". Period!
Again, thank you.

Re: Which intake is better flowing? [Re: bigblock340power] #1274468
07/29/12 08:03 PM
07/29/12 08:03 PM
Joined: Jan 2003
Posts: 25,200
Upper Midwest
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MoparforLife Offline
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Upper Midwest
Maybe this will tell you something: Back a few years ago I was in the process of ordering a new Airgap form a prominent engine builder on the east coast. He asked me what I was running at the time and I was told to save my money, that andy improvement (if any) would be minor and not a cost efficient thing.
Not satisfied I called edlebrock tech and the technician I got was familiar with the old school LD340 and he told me the same thing. IMO it speaks well for old school technology.

Re: Which intake is better flowing? [Re: MoparforLife] #1274469
07/30/12 07:03 PM
07/30/12 07:03 PM
Joined: Aug 2004
Posts: 8,087
Elk Grove, Calif.
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bigblock340power Offline OP
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Quote:

Maybe this will tell you something: Back a few years ago I was in the process of ordering a new Airgap form a prominent engine builder on the east coast. He asked me what I was running at the time and I was told to save my money, that andy improvement (if any) would be minor and not a cost efficient thing.
Not satisfied I called edlebrock tech and the technician I got was familiar with the old school LD340 and he told me the same thing. IMO it speaks well for old school technology.






Wow! I was going to go with the M-1. But now, I might just use the LD340. I kind of like the look better on the LD too. Besides it's all blasted and ready for paint. I guess it would be cool to open the hood and see an LD340 under there. Don't see to many of them now-a-days. Ok, I'm going LD!

Re: Which intake is better flowing? [Re: bigblock340power] #1274470
07/30/12 07:20 PM
07/30/12 07:20 PM
Joined: Jan 2003
Posts: 25,200
Upper Midwest
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MoparforLife Offline
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Upper Midwest
I have one on my street 360 in the Coronet and ran one in the drag Duster for several years till I sold the car. It ran consistant 11.40's with a best of 11.349 with a 360.


Clean it, if it's Dirty. Oil it, if it Squeaks. But: Don't fix it, if it Works!
Re: Which intake is better flowing? [Re: MoparforLife] #1274471
07/30/12 08:05 PM
07/30/12 08:05 PM
Joined: Feb 2009
Posts: 1,274
Ontario.Canada
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can.al Offline
pro stock
can.al  Offline
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Ontario.Canada
..probably not much wiggle room left when it comes to getting air from the carb to the cylinders after 50 years.

Re: Which intake is better flowing? [Re: can.al] #1274472
08/02/12 12:57 PM
08/02/12 12:57 PM
Joined: Jan 2003
Posts: 5,894
Florida
Locomotion Offline
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Florida
Quote:

..how did you compare them to each other?




If that question was directed to me.......I swapped the intakes at the track and had time to try some different jetting and accellerator pump changes. I just don't recall if it was all in one, long test-&-tune day or also included the next day which provided time trials and a race. Weather was taken into consideration, but conditions were similar.

Re: Which intake is better flowing? [Re: bigblock340power] #1274473
08/02/12 02:33 PM
08/02/12 02:33 PM
Joined: May 2003
Posts: 15,487
Florida
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scratchnfotraction Offline
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Florida
Quote:

Quote:

Maybe this will tell you something: Back a few years ago I was in the process of ordering a new Airgap form a prominent engine builder on the east coast. He asked me what I was running at the time and I was told to save my money, that andy improvement (if any) would be minor and not a cost efficient thing. Not satisfied I called edlebrock tech and the technician I got was familiar with the old school LD340 and he told me the same thing. IMO it speaks well for old school technology.


Wow! I was going to go with the M-1. But now, I might just use the LD340. I kind of like the look better on the LD too. Besides it's all blasted and ready for paint. I guess it would be cool to open the hood and see an LD340 under there. Don't see to many of them now-a-days. Ok, I'm going LD!




I run a LD4B(318 small port) and the LD340, I wont get rid of mine anytime soon.

I tried the airgap but went back to the LD340,I gained nothing with the airgap. did not lose anything but saved $ as I borrowed the airgap for a T&T run down. glad Don gave me that same advice when I was looking to buy an airgap

when I was growing up the LD340 is all I ever heard about on the SB 340, even hear it still today.


Re: Which intake is better flowing? [Re: bigblock340power] #1274474
08/03/12 02:25 PM
08/03/12 02:25 PM
Joined: Feb 2003
Posts: 1,142
Tucson, AZ
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cruzin Offline
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Tucson, AZ
LD-340 with a 1" spacer if you can accomodate the added clearance.







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