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Six Pack carb parts #2608152
01/17/19 03:53 PM
01/17/19 03:53 PM
Joined: May 2004
Posts: 5,110
Warrenton, VA
RoadRunnerJD Offline OP
master
RoadRunnerJD  Offline OP
master

Joined: May 2004
Posts: 5,110
Warrenton, VA
Has anyone installed the ProMax metering plates in their outboard carbs? Do they work good? What size jets do you use? Are they supposed to be the same size as the orifices in stock metering plates? I bought these for mine but had second thoughts about using them. I was concerned that mine had been modified and thought the ProMax might help get the carbs back to square one.

image.jpg
Re: Six Pack carb parts [Re: RoadRunnerJD] #2608374
01/18/19 12:07 AM
01/18/19 12:07 AM
Joined: Jan 2003
Posts: 42,704
Spokane Washington
ScottSmith_Harms Offline
Mr Wizzard
ScottSmith_Harms  Offline
Mr Wizzard

Joined: Jan 2003
Posts: 42,704
Spokane Washington
Nothing wrong with those metering plates, I've put them in carbs at customers request and they run great. However, you certainly don't need them to make your carbs run right, and especially not to get them back to "Square One" (stock). There looks to be a jetting guide on the paper underneath them in your pic. If that doesn't answer your questions you should probably call Pro-Max.

Re: Six Pack carb parts [Re: RoadRunnerJD] #2608418
01/18/19 01:43 AM
01/18/19 01:43 AM
Joined: Jun 2012
Posts: 875
MYRTLE BEACH SOUTH CAROLINA
E
ek3 Offline
super stock
ek3  Offline
super stock
E

Joined: Jun 2012
Posts: 875
MYRTLE BEACH SOUTH CAROLINA
I have used them ,, worked well for me. if you find that you need to adjust the fuel rate , it is nice to have a quick and easy way to do it. I used a dyno run to get mine right . 1 time and it was right on!

Re: Six Pack carb parts [Re: RoadRunnerJD] #2608420
01/18/19 01:46 AM
01/18/19 01:46 AM
Joined: Jan 2003
Posts: 1,616
Nebraska
4
4406bbl Offline
top fuel
4406bbl  Offline
top fuel
4

Joined: Jan 2003
Posts: 1,616
Nebraska
Plates are fine,

Front plate #34
Idle feed .036
Main jet .089-.089

Rear plate #35
Idle feed .036
Main jet .086 right .093 left

Kill bleeds .043

Idle air bleeds .055

High speed bleed.038

Throttle blade hole.078

This is what I found on 3 stock 1970 440 setups, 69s are not the same, 340 is not the same The mopar performance #34, #35 plates match this, some later plates did not match for me, had smaller jets. If this is wrong hopefully someone will correct.

Some have said their promax plates had bigger idle feeds so check to be sure. Match a stock 34 and 35 plate to start.

Re: Six Pack carb parts [Re: 4406bbl] #2608759
01/18/19 08:09 PM
01/18/19 08:09 PM
Joined: Feb 2006
Posts: 561
TN
1DGEMAN Offline
mopar
1DGEMAN  Offline
mopar

Joined: Feb 2006
Posts: 561
TN
[quote=4406bbl]Plates are fine,

Front plate #34
Idle feed .036
Main jet .089-.089

Rear plate #35
Idle feed .036
Main jet .086 right .093 left

Kill bleeds .043

Idle air bleeds .055

High speed bleed.038

Throttle blade hole.078

This is what I found on 3 stock 1970 440 setups, 69s are not the same, 340 is not the same The mopar performance #34, #35 plates match this, some later plates did not match for me, had smaller jets. If this is wrong hopefully someone will correct.

Some have said their promax plates had bigger idle feeds so check to be sure. Match a stock 34 and 35 plate to start.

You seem very knowledgeable about the plates. Do you know what the sizes are on the 340 plates? I had heard that BLP makes the plates and blocks for Pro max true?


Real Men shift for themselves
Re: Six Pack carb parts [Re: RoadRunnerJD] #2608765
01/18/19 08:25 PM
01/18/19 08:25 PM
Joined: Jan 2003
Posts: 3,470
South San Francisco, Ca
70sixpkRT Offline
master
70sixpkRT  Offline
master

Joined: Jan 2003
Posts: 3,470
South San Francisco, Ca
I've been using those Promax metering plates for the last 15 yrs. No problems with mine. The thing I like about them is you can change jets very easy and not have to worry about finding a stock set of plates. I also don't have to worry about drilling larger size holes in the stock plates. You can drill bigger but not smaller holes. It does include a jetting guide.


[img]http://www.imgur.com/hxlGUJt.gif[/img]
4-speed
3:54 Dana
13.01 @107.93 with street tires (not hooking up)
Re: Six Pack carb parts [Re: 1DGEMAN] #2609405
01/20/19 04:15 PM
01/20/19 04:15 PM
Joined: Jan 2003
Posts: 1,616
Nebraska
4
4406bbl Offline
top fuel
4406bbl  Offline
top fuel
4

Joined: Jan 2003
Posts: 1,616
Nebraska
Originally Posted By 1DGEMAN
[quote=4406bbl]Plates are fine,

Front plate #34
Idle feed .036
Main jet .089-.089

Rear plate #35
Idle feed .036
Main jet .086 right .093 left

Kill bleeds .043

Idle air bleeds .055

High speed bleed.038

Throttle blade hole.078

This is what I found on 3 stock 1970 440 setups, 69s are not the same, 340 is not the same The mopar performance #34, #35 plates match this, some later plates did not match for me, had smaller jets. If this is wrong hopefully someone will correct.

Some have said their promax plates had bigger idle feeds so check to be sure. Match a stock 34 and 35 plate to start.

You seem very knowledgeable about the plates. Do you know what the sizes are on the 340 plates? I had heard that BLP makes the plates and blocks for Pro max true?


Sorry I do not know much, just wish those that do know would post the exact stock orifice sizes for the 340 and 440 setup, that way a person would know what they have. It gets a little old seeing people post, oh just return it all to stock size and start there, what is truly stock size? I am pretty sure my 440 specs are correct as I have not been corrected, usually if you post something wrong here you will find out fast. The #34 and #35 plates that you buy from holley now are wrong, or the catalog specs are wrongfor a 6bbl. For the 340 I have little info, #41 plates, .067 kill bleeds. Holley catalog says #41 plate is .033 idle bleed, and .070 main jet....I doubt thats correct for a 6bbl. I sold the 340 stuff off years ago, if I had one I would tear it down and give you the info. Maybe someone that has a 340 that runs right could post what they have next time it is apart.

Re: Six Pack carb parts [Re: RoadRunnerJD] #2609422
01/20/19 05:02 PM
01/20/19 05:02 PM
Joined: Feb 2012
Posts: 4,248
Morristown Tn.
7
71birdJ68 Offline
master
71birdJ68  Offline
master
7

Joined: Feb 2012
Posts: 4,248
Morristown Tn.
I've used those blue gaskets before, they tore on the first removal, worse than stock gaskets.

Re: Six Pack carb parts [Re: RoadRunnerJD] #2609457
01/20/19 05:53 PM
01/20/19 05:53 PM
Joined: Jan 2003
Posts: 1,616
Nebraska
4
4406bbl Offline
top fuel
4406bbl  Offline
top fuel
4

Joined: Jan 2003
Posts: 1,616
Nebraska
Thats weird, I have used quick fuel and holley blue with no issues. Wonder if there are cheap knockoffs out there.

Re: Six Pack carb parts [Re: RoadRunnerJD] #2609558
01/20/19 08:55 PM
01/20/19 08:55 PM
Joined: Jan 2003
Posts: 42,704
Spokane Washington
ScottSmith_Harms Offline
Mr Wizzard
ScottSmith_Harms  Offline
Mr Wizzard

Joined: Jan 2003
Posts: 42,704
Spokane Washington
Add a VERY light coat of vaseline or white grease to the gasket surfaces and they'll come off a lot easier.

Re: Six Pack carb parts [Re: RoadRunnerJD] #2610019
01/21/19 06:28 PM
01/21/19 06:28 PM
Joined: May 2004
Posts: 5,110
Warrenton, VA
RoadRunnerJD Offline OP
master
RoadRunnerJD  Offline OP
master

Joined: May 2004
Posts: 5,110
Warrenton, VA
I figured out how to read the jetting guide. My OE plates were definitely modified.

Re: Six Pack carb parts [Re: RoadRunnerJD] #2634583
03/19/19 07:57 PM
03/19/19 07:57 PM
Joined: Jul 2003
Posts: 5,048
upstate western ny
sogtx Offline
master
sogtx  Offline
master

Joined: Jul 2003
Posts: 5,048
upstate western ny
they work real good - I cried when i saw you sold them frown
never can watch all the ads....

Re: Six Pack carb parts [Re: 4406bbl] #2634620
03/19/19 09:07 PM
03/19/19 09:07 PM
Joined: May 2012
Posts: 1,320
South Bend
John Brown Offline
pro stock
John Brown  Offline
pro stock

Joined: May 2012
Posts: 1,320
South Bend
Originally Posted by 4406bbl
Originally Posted by 1DGEMAN
[quote=4406bbl]Plates are fine,

Front plate #34
Idle feed .036
Main jet .089-.089

Rear plate #35
Idle feed .036
Main jet .086 right .093 left

Kill bleeds .043

Idle air bleeds .055

High speed bleed.038

Throttle blade hole.078

This is what I found on 3 stock 1970 440 setups, 69s are not the same, 340 is not the same The mopar performance #34, #35 plates match this, some later plates did not match for me, had smaller jets. If this is wrong hopefully someone will correct.

Some have said their promax plates had bigger idle feeds so check to be sure. Match a stock 34 and 35 plate to start.

You seem very knowledgeable about the plates. Do you know what the sizes are on the 340 plates? I had heard that BLP makes the plates and blocks for Pro max true?


Sorry I do not know much, just wish those that do know would post the exact stock orifice sizes for the 340 and 440 setup, that way a person would know what they have. It gets a little old seeing people post, oh just return it all to stock size and start there, what is truly stock size? I am pretty sure my 440 specs are correct as I have not been corrected, usually if you post something wrong here you will find out fast. The #34 and #35 plates that you buy from holley now are wrong, or the catalog specs are wrongfor a 6bbl. For the 340 I have little info, #41 plates, .067 kill bleeds. Holley catalog says #41 plate is .033 idle bleed, and .070 main jet....I doubt thats correct for a 6bbl. I sold the 340 stuff off years ago, if I had one I would tear it down and give you the info. Maybe someone that has a 340 that runs right could post what they have next time it is apart.


I believe some of my Holley catalogues have the specs for the metering plates. I'll dig them out tomorrow and see what I find.


July 19th should be "Drive Like Rockford Day". R.I.P. Jimmie.
Re: Six Pack carb parts [Re: John Brown] #2638006
03/28/19 09:06 AM
03/28/19 09:06 AM
Joined: May 2012
Posts: 1,320
South Bend
John Brown Offline
pro stock
John Brown  Offline
pro stock

Joined: May 2012
Posts: 1,320
South Bend
Here's what my old Holley catalogues have comparing plate numbers to idle restrictions and jet sizes.

IMG_0691.JPGIMG_0692.JPG

July 19th should be "Drive Like Rockford Day". R.I.P. Jimmie.
Re: Six Pack carb parts [Re: John Brown] #2643043
04/08/19 10:48 PM
04/08/19 10:48 PM
Joined: Feb 2003
Posts: 3,664
NE OHIO
K
kevin69bman Offline
master
kevin69bman  Offline
master
K

Joined: Feb 2003
Posts: 3,664
NE OHIO
OK I may be a dummy but there was never a meter block on the out board carbs I don't have any on mine there just the to dump gas????

Re: Six Pack carb parts [Re: kevin69bman] #2643063
04/09/19 12:33 AM
04/09/19 12:33 AM
Joined: Jan 2003
Posts: 1,616
Nebraska
4
4406bbl Offline
top fuel
4406bbl  Offline
top fuel
4

Joined: Jan 2003
Posts: 1,616
Nebraska
No metering blocks on outboards, they use metering plates. The holley chart above is incorrect for a 6bbl. A #34 plate with a .052 main jet will not work in any 1-3/4 plate carb, nor will the #35 with .071 jet. 2 #27 or #5s would be a decent start.

Re: Six Pack carb parts [Re: 4406bbl] #2650709
04/30/19 09:46 PM
04/30/19 09:46 PM
Joined: Jul 2007
Posts: 287
St. Louis
I
Imrare Offline
enthusiast
Imrare  Offline
enthusiast
I

Joined: Jul 2007
Posts: 287
St. Louis
Thanks for the information. The two metering plates in my end carburetors had a stamping of #41 with a casting #34R-6153B. The PVCR (Power Valve Channel Restriction) or jetting (fig. A above) is staggered at .086 (driver side) and .073 (pass side) with the Secondary Idle Speed Restriction being .036 on both plates (front & rear carb), driver and pass side. Based on the parts book and what I am understanding then, the metering plates were the same for both front and rear carbs.

Is anyone familiar with how many turns out the air mixture screws were set from the factory on the end carbs? I know this must have been a very precise setting because all end carbs came with "plugs" over the adjusting needles so they couldn't be messed with.

Thanks

Re: Six Pack carb parts [Re: Imrare] #2652175
05/05/19 10:24 AM
05/05/19 10:24 AM
Joined: Aug 2009
Posts: 1,057
Ohio
J
jlatessa Offline
super stock
jlatessa  Offline
super stock
J

Joined: Aug 2009
Posts: 1,057
Ohio
As an original owner of an A12, if my memory (I'm 77) serves me right, when I tried to improve the bad idle
characteristics, the screws were barely, if at all, off the seats.

The best results were 1/8 or a 1/4 turn off the seat.

Joe

Re: Six Pack carb parts [Re: jlatessa] #2652253
05/05/19 12:23 PM
05/05/19 12:23 PM
Joined: Jan 2003
Posts: 9,434
Blair County,PA
62maxwgn Offline
master
62maxwgn  Offline
master

Joined: Jan 2003
Posts: 9,434
Blair County,PA
Originally Posted by jlatessa
As an original owner of an A12, if my memory (I'm 77) serves me right, when I tried to improve the bad idle
characteristics, the screws were barely, if at all, off the seats.

The best results were 1/8 or a 1/4 turn off the seat.

Joe


I just finished two sets of A12 carbs,one for a member here and the other a member on the A12 site that still had the original lead plugs,both sets were out exactly two turns except the driver side front left on the one set and it was 1 3/4 turns out. shruggy

Re: Six Pack carb parts [Re: 62maxwgn] #2652291
05/05/19 02:05 PM
05/05/19 02:05 PM
Joined: Aug 2009
Posts: 1,057
Ohio
J
jlatessa Offline
super stock
jlatessa  Offline
super stock
J

Joined: Aug 2009
Posts: 1,057
Ohio
So much for my memory...LOL

Joe







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