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Re: 340 6 pack intake porting???
[Re: ademon]
#1486850
08/19/13 06:25 PM
08/19/13 06:25 PM
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Joined: Jan 2003
Posts: 5,894
Florida
Locomotion
master
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master
Joined: Jan 2003
Posts: 5,894
Florida
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It's a good intake as-is, but a Six Pack is difficult to tune and set-up for optimum performance. Personally I would be afraid to do anything more than smoothing out any imperfections without a flow bench. I do tend to be rather cautious. You can make more HP with a properly tuned carb on a good 4 bbl intake. Here is an old but interesting article on dynoed small block intakes. Mopar Muscle Magazine small block intake article.P.S.: Always look at the "area under the curve", not necessarily peak numbers, for best performance. (It would be easier to understand with a line graph as opposed to a numbers chart.)
Last edited by Locomotion; 08/19/13 06:39 PM.
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Re: 340 6 pack intake porting???
[Re: ademon]
#1486851
08/19/13 06:32 PM
08/19/13 06:32 PM
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Joined: Aug 2003
Posts: 12,291
Kent, Wa
340SHORTY
Truck Nut
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Truck Nut
Joined: Aug 2003
Posts: 12,291
Kent, Wa
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Mine is absolutely stock as it came out of the box on my warmed up 340. It will pull further in the RPM range higher than I am willing to rev it. Ive seen mine well above 5000 a few times tho. IMO your vale train may limit your RPM range more than the capabilities of a 6 pac...
I am truckless..
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Re: 340 6 pack intake porting???
[Re: 340SHORTY]
#1486853
08/20/13 12:25 PM
08/20/13 12:25 PM
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Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
Mine is absolutely stock as it came out of the box on my warmed up 340. It will pull further in the RPM range higher than I am willing to rev it. Ive seen mine well above 5000 a few times tho. IMO your vale train may limit your RPM range more than the capabilities of a 6 pac...
I hit the shifter at 6400 w/o any issues, stock carbs and intake.
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Re: 340 6 pack intake porting???
[Re: Mr.Yuck]
#1486854
08/20/13 12:28 PM
08/20/13 12:28 PM
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Joined: Oct 2003
Posts: 2,537
PORT ALBERNI , BC., CANADA
superwrench
master
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master
Joined: Oct 2003
Posts: 2,537
PORT ALBERNI , BC., CANADA
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Quote:
Quote:
Mine is absolutely stock as it came out of the box on my warmed up 340. It will pull further in the RPM range higher than I am willing to rev it. Ive seen mine well above 5000 a few times tho. IMO your vale train may limit your RPM range more than the capabilities of a 6 pac...
I hit the shifter at 6400 w/o any issues, stock carbs and intake.
Me too!! 
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Re: 340 6 pack intake porting???
[Re: ademon]
#1486860
08/20/13 03:41 PM
08/20/13 03:41 PM
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Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
Im sure even with the stock 6 pack and carbs on top of a good 416" i will have no trouble seeing 11.50's and maybe quicker before they toss me out of the strip for no bar. 
I think the stock carbs out-flow the mechanicals. FWIW I'm pretty much under 11.50 (unless I blow the tires up) and haven't been asked to leave yet. They key is to put 12.0 @ 115 on your tech card. Usually the guy handing out slips isn't looking inside the car for a cage.
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Re: 340 6 pack intake porting???
[Re: Mr.Yuck]
#1486861
08/20/13 03:57 PM
08/20/13 03:57 PM
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Joined: Sep 2004
Posts: 6,906
IL, Aurora
ademon
OP
master
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OP
master
Joined: Sep 2004
Posts: 6,906
IL, Aurora
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Quote:
Quote:
Im sure even with the stock 6 pack and carbs on top of a good 416" i will have no trouble seeing 11.50's and maybe quicker before they toss me out of the strip for no bar.
I think the stock carbs out-flow the mechanicals. FWIW I'm pretty much under 11.50 (unless I blow the tires up) and haven't been asked to leave yet. They key is to put 12.0 @ 115 on your tech card. Usually the guy handing out slips isn't looking inside the car for a cage.
there rated at 1355cfm, i know when compared to 4bbl rating i think they are in the 975 cfm range same as the stock vacuum carbs. The manifold ports are quite a bit smaller than the gasket so at the very least i will gasket match them to the heads.
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Re: 340 6 pack intake porting???
[Re: ademon]
#1486862
08/20/13 04:08 PM
08/20/13 04:08 PM
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Joined: Apr 2005
Posts: 12,271
Overpriced Housing Central
RobX4406
I Live Here
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I Live Here
Joined: Apr 2005
Posts: 12,271
Overpriced Housing Central
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Quote:
Im sure even with the stock 6 pack and carbs on top of a good 416" i will have no trouble seeing 11.50's and maybe quicker before they toss me out of the strip for no bar.
The 6 Pack will be an easy way to slow you down. 
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Re: 340 6 pack intake porting???
[Re: RobX4406]
#1486863
08/20/13 05:22 PM
08/20/13 05:22 PM
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Joined: Sep 2004
Posts: 6,906
IL, Aurora
ademon
OP
master
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OP
master
Joined: Sep 2004
Posts: 6,906
IL, Aurora
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Quote:
Quote:
Im sure even with the stock 6 pack and carbs on top of a good 416" i will have no trouble seeing 11.50's and maybe quicker before they toss me out of the strip for no bar.
The 6 Pack will be an easy way to slow you down.
well so be it!! It's a street car, like any street driven car it will spend 90% of the time under 4k, it will only see the track a few times a year so I'll live with it, and the better mileage. But if I want to pick up a few more tenths I'll toss my ported strip dominator on it, or my worked torker II, or the venerable LD340 I have laying around here somewhere LOL 
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Re: 340 6 pack intake porting???
[Re: ademon]
#1486864
08/20/13 05:29 PM
08/20/13 05:29 PM
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Joined: Oct 2003
Posts: 2,403
WASHINGTON, PA
11secaarcuda
top fuel
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top fuel
Joined: Oct 2003
Posts: 2,403
WASHINGTON, PA
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I shift my AAR at 7000 and it has hit the rev limiter quite a few times set at 7500. My 340 six pack loves to rev. Best time 12.3 @ 109. It slows down if I shift it anywhere lower than 6600 rpms. It has also gone 11.90 with a small shot of nitrous through the 6 pack intake.
67 Dart GT 340 4 speed
70 AAR Cuda 408 6 barrel
96 Indy Ram original owner
2011 Hemi Durango
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Re: 340 6 pack intake porting???
[Re: ademon]
#1486865
08/20/13 06:02 PM
08/20/13 06:02 PM
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Joined: Apr 2005
Posts: 12,271
Overpriced Housing Central
RobX4406
I Live Here
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I Live Here
Joined: Apr 2005
Posts: 12,271
Overpriced Housing Central
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Quote:
Quote:
Quote:
Im sure even with the stock 6 pack and carbs on top of a good 416" i will have no trouble seeing 11.50's and maybe quicker before they toss me out of the strip for no bar.
The 6 Pack will be an easy way to slow you down.
well so be it!! It's a street car, like any street driven car it will spend 90% of the time under 4k, it will only see the track a few times a year so I'll live with it, and the better mileage. But if I want to pick up a few more tenths I'll toss my ported strip dominator on it, or my worked torker II, or the venerable LD340 I have laying around here somewhere LOL
All good, run what you like is the best approach. That isn't always the max performance which is fine.
If 11.50 is you goal, that should not be hard to attain with a decent hooking 360/420-430hp.
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Re: 340 6 pack intake porting???
[Re: 11secaarcuda]
#1486866
08/20/13 06:14 PM
08/20/13 06:14 PM
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Joined: Sep 2004
Posts: 6,906
IL, Aurora
ademon
OP
master
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OP
master
Joined: Sep 2004
Posts: 6,906
IL, Aurora
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Quote:
I shift my AAR at 7000 and it has hit the rev limiter quite a few times set at 7500. My 340 six pack loves to rev. Best time 12.3 @ 109. It slows down if I shift it anywhere lower than 6600 rpms. It has also gone 11.90 with a small shot of nitrous through the 6 pack intake.
Nice! Is that the old Eddy intake or the Mopar? I thought I read somewhere that the intake hit a flat spot around 6,200 rpm but then made power again past that if pushed higher.
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Re: 340 6 pack intake porting???
[Re: RobX4406]
#1486867
08/20/13 07:17 PM
08/20/13 07:17 PM
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Joined: Oct 2003
Posts: 2,537
PORT ALBERNI , BC., CANADA
superwrench
master
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master
Joined: Oct 2003
Posts: 2,537
PORT ALBERNI , BC., CANADA
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Quote:
Quote:
Im sure even with the stock 6 pack and carbs on top of a good 416" i will have no trouble seeing 11.50's and maybe quicker before they toss me out of the strip for no bar.
The 6 Pack will be an easy way to slow you down.
 Never say that.....I just ran 10.80's last weekend.
Everyone says that I'd run 10.60's with a good single plane and 4 bbl....not that I don't believe them, but why change when I'm having a blast making mine run quicker and quicker.
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Re: 340 6 pack intake porting???
[Re: RobX4406]
#1486868
08/20/13 09:49 PM
08/20/13 09:49 PM
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Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
Quote:
Im sure even with the stock 6 pack and carbs on top of a good 416" i will have no trouble seeing 11.50's and maybe quicker before they toss me out of the strip for no bar.
The 6 Pack will be an easy way to slow you down.
really? A 6-pack is a good all around unit that is capable of 10's if tuned right. Not to mention they get good MPG's when compaired to BIG 4bbls. If I can get my traction issues worked out I'll be 11.teens or better w/ a stock intake and carbs. Not sure an RPM and single Holley would do a ton better.
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