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Ld 340 flow bench test results #1197021 03/14/12 04:30 PM 03/14/12 04:30 PM
Joined: Feb 2005 Posts: 20,169 PA. pittsburghracer OP "Little"John
pittsburghracer OP "Little"John Joined: Feb 2005 Posts: 20,169 PA.	A good Friend of mine asked me if I would check his LD 340 on my flow bench today and I myself was a little curious so I mounted a small block edelbrock to the bench and did a flow test on the head. We then bolted his some what grubby looking intake to the head. This was a used intake that was never touched with a grinder so it was not even gasket matched. Here are the flow numbers. head head with intake 100 60 62 200 137 130 300 200 187 400 251 224 450 256 239 500 267 247 550 273 249 600 275 254 650 276 255 700 276 255 I always knew that these were good intakes and after doing this test it backs up what we have seen at the track for years. He wants to see the results from Matt's Victor 340 intake and if they are close we will do some gasket matching and touch up work to the LD340. Here are a couple of pictures of his intake so you can see how much better it could be with some work. 1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27 Livin and lovin life one day at a time

Re: Ld 340 flow bench test results [Re: pittsburghracer] #1197022 03/14/12 04:36 PM 03/14/12 04:36 PM
Joined: Feb 2007 Posts: 5,080 organ M maximum entropy master
maximum entropy master M Joined: Feb 2007 Posts: 5,080 organ	wow, that is good. no wonder my old 340 ran so good. interesting. for what is the good life if not doing things thoughtfully?

Re: Ld 340 flow bench test results [Re: pittsburghracer] #1197023 03/14/12 08:25 PM 03/14/12 08:25 PM
Joined: Jul 2006 Posts: 4,595 On the south side of Nowhere S S/ST 3040 master
S/ST 3040 master S Joined: Jul 2006 Posts: 4,595 On the south side of Nowhere	That is pretty good, especially for a dual plane intake. Did you tape up the 7 unused ports for the test?

Re: Ld 340 flow bench test results [Re: S/ST 3040] #1197024 03/14/12 09:14 PM 03/14/12 09:14 PM
Joined: Feb 2005 Posts: 20,169 PA. pittsburghracer OP "Little"John
pittsburghracer OP "Little"John Joined: Feb 2005 Posts: 20,169 PA.	Quote: That is pretty good, especially for a dual plane intake. Did you tape up the 7 unused ports for the test? I always just stuff red garage rags in all the other ports out of the plenum flow path. I like to play with open and 4 hole adapters mounted on top but they were all in use today. I know the LD340 has always been a good intake but I was still surprised by the numbers especially with it not being at least gasket matched. In that one picture you can see his old gasket mark. Matt had his victor in his car today so I couldn't try it but I will try to update this with those numbers tomorrow. 1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27 Livin and lovin life one day at a time

Re: Ld 340 flow bench test results [Re: pittsburghracer] #1197025 03/15/12 03:43 AM 03/15/12 03:43 AM
Joined: Jul 2005 Posts: 384 Australia M Mcode69 enthusiast
Mcode69 enthusiast M Joined: Jul 2005 Posts: 384 Australia	I'd love to see the numbers with the plennum divider milled out of it.

Re: Ld 340 flow bench test results [Re: Mcode69] #1197026 03/15/12 08:42 AM 03/15/12 08:42 AM
Joined: Feb 2005 Posts: 20,169 PA. pittsburghracer OP "Little"John
pittsburghracer OP "Little"John Joined: Feb 2005 Posts: 20,169 PA.	Quote: I'd love to see the numbers with the plennum divider milled out of it. I just sold a used one a few months ago to one of our members that I had laying here for years. Whoever owned it before me cut the plenum out and then welded it back in. Here's a picture of the manifold before I sold it. Last edited by pittsburghracer; 03/15/12 08:44 AM. 1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27 Livin and lovin life one day at a time

Re: Ld 340 flow bench test results [Re: pittsburghracer] #1197027 03/15/12 10:07 AM 03/15/12 10:07 AM
Joined: Jul 2010 Posts: 2,091 Delray beach, Florida P Performance Only top fuel
Performance Only top fuel P Joined: Jul 2010 Posts: 2,091 Delray beach, Florida	i'm scratching my head wondering why you guys think losing 20-30 cfm through the manifold are good numbers? machine shop owner and engine builder

Re: Ld 340 flow bench test results [Re: pittsburghracer] #1197028 03/15/12 10:13 AM 03/15/12 10:13 AM
Joined: Jan 2003 Posts: 6,840 The Swamp S Sixpak master
Sixpak master S Joined: Jan 2003 Posts: 6,840 The Swamp	I'd be curious what a stock 69-70 340 avs intake would flow and compare the two. All the reading I've done over the years says the stock manifold was pretty good right out of the box, and that the ld340 was really just a copy in aluminum - 5 HP at best over the stock intake. Same goes for the current aluminum dual plane MP offers for the small block - it too looks like an aluminum copy of the factory cast iron avs intake.

Re: Ld 340 flow bench test results [Re: Performance Only] #1197029 03/15/12 10:47 AM 03/15/12 10:47 AM
Joined: Feb 2005 Posts: 20,169 PA. pittsburghracer OP "Little"John
pittsburghracer OP "Little"John Joined: Feb 2005 Posts: 20,169 PA.	Quote: i'm scratching my head wondering why you guys think losing 20-30 cfm through the manifold are good numbers? Dan this intake was not even gasket matched. Every intake I have tested has picked up 10+ cfm just by doing that. Flow a small block super victor sometime if you really want to see a piece of crap. I bolted a small block chevy victor jr. to a set of Dart platinum heads I ported and the numbers dropped from 300cfm to 260 and the chevy guys love that intake. 1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27 Livin and lovin life one day at a time

Re: Ld 340 flow bench test results [Re: Sixpak] #1197030 03/15/12 10:49 AM 03/15/12 10:49 AM
Joined: Sep 2004 Posts: 2,091 oberlin, Ohio Rapid340 top fuel
Rapid340 top fuel Joined: Sep 2004 Posts: 2,091 oberlin, Ohio	LD340's are not at all a copy of a stock intake. Ive picked up over 1mph going fromm a ported stock TQ intake to a gasket matched LD340. 1971 Factory Appearing Duster 340 11.000 @ 122 mph

Re: Ld 340 flow bench test results [Re: Rapid340] #1197031 03/15/12 12:16 PM 03/15/12 12:16 PM
Joined: Apr 2005 Posts: 12,271 Overpriced Housing Central RobX4406 I Live Here
RobX4406 I Live Here Joined: Apr 2005 Posts: 12,271 Overpriced Housing Central	Brian did that same test with an RPM and SV and the SV flowed more air. SV made less HP and a bunch less tq on the 408 engine. Guess it's all specific to what you want to do. http://www.carcraft.com/techarticles/ccrp_1006_small_block_mopar_stroker_dyno_test/index.html I like the old LD intake.

Re: Ld 340 flow bench test results [Re: RobX4406] #1197032 03/15/12 01:13 PM 03/15/12 01:13 PM
Joined: May 2005 Posts: 1,973 Apollo, PA. B1MAXX top fuel
B1MAXX top fuel Joined: May 2005 Posts: 1,973 Apollo, PA.	John, I have a port mathed victor jr on the shelf.If you need one to try.

Re: Ld 340 flow bench test results [Re: B1MAXX] #1197033 03/15/12 01:41 PM 03/15/12 01:41 PM
Joined: Feb 2005 Posts: 20,169 PA. pittsburghracer OP "Little"John
pittsburghracer OP "Little"John Joined: Feb 2005 Posts: 20,169 PA.	Quote: John, I have a port mathed victor jr on the shelf.If you need one to try. Not if its a chevy. I have (4) 2975's and (1) 2999 I have been buying used ones, porting them and selling them. I am finding out that you can buy that used chevy stuff real cheap and after a little work its pretty easy so resale. 1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27 Livin and lovin life one day at a time

Re: Ld 340 flow bench test results [Re: pittsburghracer] #1197034 03/15/12 01:59 PM 03/15/12 01:59 PM
Joined: May 2005 Posts: 1,973 Apollo, PA. B1MAXX top fuel
B1MAXX top fuel Joined: May 2005 Posts: 1,973 Apollo, PA.	No, its for standard port small mopar...

Re: Ld 340 flow bench test results [Re: pittsburghracer] #1197035 03/15/12 02:09 PM 03/15/12 02:09 PM
Joined: Jul 2010 Posts: 2,091 Delray beach, Florida P Performance Only top fuel
Performance Only top fuel P Joined: Jul 2010 Posts: 2,091 Delray beach, Florida	Quote: Quote: i'm scratching my head wondering why you guys think losing 20-30 cfm through the manifold are good numbers? Dan this intake was not even gasket matched. Every intake I have tested has picked up 10+ cfm just by doing that. Flow a small block super victor sometime if you really want to see a piece of crap. I bolted a small block chevy victor jr. to a set of Dart platinum heads I ported and the numbers dropped from 300cfm to 260 and the chevy guys love that intake. okay, i see what your saying. the ld340 is better than some of the other intakes. i'll buy that. the ports in that manifold are tiny, so velocity is high, but the flow still stinks IMO, even after gasket matching. for the right combo there'd be an obvious gain over stock, but that intake will only get you just so much. glad you flowed it and alway's enjoy seeing results like the ones you posted. machine shop owner and engine builder

Re: Ld 340 flow bench test results [Re: Performance Only] #1197036 03/15/12 03:08 PM 03/15/12 03:08 PM
Joined: Jan 2003 Posts: 2,931 P Paul_Fancsali master
Paul_Fancsali master P Joined: Jan 2003 Posts: 2,931	Over .12 in qtr over stock intake and a new M1 dual plane. But the divider was milled down. Check the heights on a stock intake and M1 dual plane the LD is hands down better. You really want to slow down use a performer dual plane Bought one new years ago and gave it away after trying to salvage my money on this mistake 318 Maybe 340-360 hell no

Re: Ld 340 flow bench test results [Re: Paul_Fancsali] #1197037 03/15/12 05:47 PM 03/15/12 05:47 PM
Joined: Aug 2004 Posts: 2,128 sweden S sshemi top fuel
sshemi top fuel S Joined: Aug 2004 Posts: 2,128 sweden	I dont belive that flow is that important on an intake. Shape and being equal is more important

Re: Ld 340 flow bench test results [Re: pittsburghracer] #1197038 03/15/12 07:41 PM 03/15/12 07:41 PM
Joined: Jul 2006 Posts: 4,595 On the south side of Nowhere S S/ST 3040 master
S/ST 3040 master S Joined: Jul 2006 Posts: 4,595 On the south side of Nowhere	I've flowed heads a good bit with intakes and carburetors. Here's an example of a ported OEM SB head w/Victor 340 and Holley 750. ................HEAD.............W/IN&CARB .100"______63.8__________63.8 .200"_____134.7_________134.5 .300"_____193.8_________190.7 .400"_____244.2_________233.3 .500"_____257.4_________240.3 .550"_____258.4_________243.4 .600"_____260.1_________245.5 Intake had a good port match and minor work in the plenum.

Re: Ld 340 flow bench test results [Re: pittsburghracer] #1197039 01/15/13 11:39 AM 01/15/13 11:39 AM
Joined: Feb 2005 Posts: 20,169 PA. pittsburghracer OP "Little"John
pittsburghracer OP "Little"John Joined: Feb 2005 Posts: 20,169 PA.	Quote: A good Friend of mine asked me if I would check his LD 340 on my flow bench today and I myself was a little curious so I mounted a small block edelbrock to the bench and did a flow test on the head. We then bolted his some what grubby looking intake to the head. This was a used intake that was never touched with a grinder so it was not even gasket matched. Here are the flow numbers. head head with intake 100 60 62 200 137 130 300 200 187 400 251 224 450 256 239 500 267 247 550 273 249 600 275 254 650 276 255 700 276 255 I always knew that these were good intakes and after doing this test it backs up what we have seen at the track for years. He wants to see the results from Matt's Victor 340 intake and if they are close we will do some gasket matching and touch up work to the LD340. Here are a couple of pictures of his intake so you can see how much better it could be with some work. Just a little update on the LD340. It peters out early and hard. I am finishing up a set his set of open chamber Edelbrocks (2.08 valve) and we didn't push as hard as we could have as he is only going to ran a 520 racer brown cam (1.6 rocker app 550). I wanted him to go with a Victor 340 but he wanted to see what the LD340 would do so I gasket matched it, a little plenum work, and a matched 4150-4500 carb adapter. There is not alot you can do in the runners as you can't even see them. Here are some new numbers. with out intake-----with intake .200---137-----------134 .300---198-----------193 .400---245-----------241 .450---268-----------250 .500---279-----------263 .550---289-----------272 .600---290-----------272 .650---292-----------271 .700---302-----------271 I have him talked into trying a Victor. 7547723-Alsld340intakeandadaptor001.JPG (580 downloads) 1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27 Livin and lovin life one day at a time

Re: Ld 340 flow bench test results [Re: pittsburghracer] #1197040 01/15/13 12:00 PM 01/15/13 12:00 PM
Joined: Jan 2003 Posts: 9,872 Weddington, N.C. Streetwize master
Streetwize master Joined: Jan 2003 Posts: 9,872 Weddington, N.C.	Vic, Have you ever tested a Victor 340 on a 300-ish @.600 flowing head? Just curious. WIZE World's Quickest Diahatsu Rocky (??) 414" Stroker Small block Mopar Powered. 10.84 @ 123...and gettin' quicker! https://www.youtube.com/watch?v=-mWzLma3YGI In Car: https://www.youtube.com/watch?v=PjXcf95e6v0

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