Dui distributors
Thread Starter
Intermediate
Joined: Nov 2020
Posts: 36
Likes: 2
From: Williams, AZ
Dui distributors
So while trying to improve upon my 75s hp I read about Lars' distributor recurve. I pulled the cover and found 8 have a Dui distributor installed, nice surprise, everything I've read says they come curved from the factory. So my question is do these need to be recurve?
Safety Car
Joined: Oct 2004
Posts: 3,921
Likes: 731
From: Youngstown Ohio
They do come curved from DUI, but you should have the curve checked yourself to know what it is. They custom curve it for the customer when it is bought. (I have one customed to my specs). If you can find the customer/distributor ID number on the distributor, call DUI. They have records on file, providing the previous owner didn't change anything.
Dr. Detroit
Joined: Mar 2012
Posts: 10,095
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From: New Braunfels Texas
Tech Contributor
Joined: Aug 1999
Posts: 14,370
Likes: 6,364
From: At my Bar drinking and wrenching in Lafayette Colorado
An excellent curve and setup. Make sure your vacuum advance control unit meets the "2-inch rule" and that it is limited to no more than 12 degrees.
Lars
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Dr. Detroit
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From: New Braunfels Texas
Team Owner
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St. Jude Donor '03 thru '10, '17
Team Owner
Joined: Feb 2000
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From: Texas
CI 1-4-5-8-9-10 Vet
St. Jude Donor '03 thru '10, '17
Le Mans Master
Joined: May 2007
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From: North tonawanda NY
Same thing really besides the edelbrock being alumium. The edelbrock is just a carter replica. Even made from the old carter molds overseas and then assembled in the US from what Ive read.
Race Director
Joined: Apr 2011
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From: North of Toronto - Ontario
FWIW, the 2" rule is basically that the vac can should pull all the way in using 2" of vacuum less than the car produces at idle. So if the car is making 14" of manifold vac at idle, the can should be fully pulled in using 12" of vacuum
Otherwise it could be hunting around at idle if it was still pulling at or around 14" type of thing
M
Otherwise it could be hunting around at idle if it was still pulling at or around 14" type of thing
M
Team Owner
Joined: Feb 2000
Posts: 45,022
Likes: 892
From: Texas
CI 1-4-5-8-9-10 Vet
St. Jude Donor '03 thru '10, '17
FWIW, the 2" rule is basically that the vac can should pull all the way in using 2" of vacuum less than the car produces at idle. So if the car is making 14" of manifold vac at idle, the can should be fully pulled in using 12" of vacuum
Otherwise it could be hunting around at idle if it was still pulling at or around 14" type of thing
M
Otherwise it could be hunting around at idle if it was still pulling at or around 14" type of thing
M
I am fixing to order a DUI w/ cross fire cap, so I have been reading reviews. One guy on another board says the DUI HEI does not have a tach connection? I assume he is FOS. Can you guys confirm?
For me, this will be going in a '79 Camaro with a factory tach (not mechanical).
Race Director
Joined: Apr 2011
Posts: 11,183
Likes: 3,334
From: North of Toronto - Ontario
I can't imagine it not having the electronic tach output but DUI would be the ones to confirm it with. The other thing I believe is that if you buy it from them they will curve it based on what you tell them the motor is but if you buy from summit/jegs/etc you get the "one size fits all curve" not sure if that matters to you or not
M
M
Dr. Detroit
Joined: Mar 2012
Posts: 10,095
Likes: 4,022
From: New Braunfels Texas
Thank you Mooser!
I am fixing to order a DUI w/ cross fire cap, so I have been reading reviews. One guy on another board says the DUI HEI does not have a tach connection? I assume he is FOS. Can you guys confirm?
For me, this will be going in a '79 Camaro with a factory tach (not mechanical).
I am fixing to order a DUI w/ cross fire cap, so I have been reading reviews. One guy on another board says the DUI HEI does not have a tach connection? I assume he is FOS. Can you guys confirm?
For me, this will be going in a '79 Camaro with a factory tach (not mechanical).
Jebby
Last edited by Jebbysan; Jul 14, 2021 at 10:43 AM.