Dui Distributors
Thread Starter
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Freshman User
Joined: Apr 2005
Posts: 31
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Dui Distributors
I am looking to buy one of those DUI distributors from Performance Distributors. They curve your distributor based on the specifications you give them...most of their questions I don't really know the answer to....so I'll ask them here..
What is the compression ratio for a 390?
What is cam duration and what is the cam duration for a 390? at .050"?
What is the valve lift?
What is my max RPM - 390 with c6 automatic?
What is the compression ratio for a 390?
What is cam duration and what is the cam duration for a 390? at .050"?
What is the valve lift?
What is my max RPM - 390 with c6 automatic?
Lead Driver
Joined: Apr 2001
Posts: 6,175
Likes: 21
From: Texas
I think there is also a significant difference between the truck 390s and car 390s. (just in case they might have swapped a car engine into the truck).
I really like what the DUI system has to offer. But, I'm not sure why you would want a $400 ignition system on a stock 390. The two main benefits I could see, possibly better mileage and fewer wires under the hood. oterwise, a good Ford duraspark system should be adequate for a stock 390.
I really like what the DUI system has to offer. But, I'm not sure why you would want a $400 ignition system on a stock 390. The two main benefits I could see, possibly better mileage and fewer wires under the hood. oterwise, a good Ford duraspark system should be adequate for a stock 390.
FE "Freakin Expensive"
Joined: Dec 2003
Posts: 6,461
Likes: 4
From: Smith Mountain Lake, VA
I have too agree with Greg, I cant see any good useing a DUI with a stock 390..when you can take that same $400 and use it to buy some bolt on stuff..Too increase performance such as Greg mentioned, The Dura spark or a Pertronix swap.. for Ignition, a set of headers,another carb, intake etc....
JMO...
Russ
JMO...
Russ
Thread Starter
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Freshman User
Joined: Apr 2005
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thanks for the responses...I found my pertronix set that I already had from another truck that I junked out...so of course I decided to just go with that and a rebuilt distributor. Runs very well now...
Senior User
Joined: Jan 2004
Posts: 157
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From: Buckeye, AZ
Be careful about recurving your distributor on a truck motor. It's fine IF you don't tow or use it as a working truck. The faster advance will cause it to ping like crazy when you pull a load up a hill.
Don't ask how I know.
Don't ask how I know.
Elder User
Joined: Feb 2005
Posts: 669
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LOL...nothing like first hand knowledge...what's that saying.."experience is the best teacher"....sometimes I'm so dang hardheaded that's the only way I learn...lol.
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Post Fiend
Joined: Jan 2003
Posts: 8,600
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From: Iowa
Originally Posted by kwanderi
Be careful about recurving your distributor on a truck motor. It's fine IF you don't tow or use it as a working truck. The faster advance will cause it to ping like crazy when you pull a load up a hill.
Don't ask how I know.
Don't ask how I know.
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Lead Driver
Joined: Sep 2003
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From: Albuquerque
Originally Posted by rusty70f100
Very true. This is part of the reason why we have vacuum advance!
Thanks...
Post Fiend
Joined: Jan 2003
Posts: 8,600
Likes: 4
From: Iowa
Originally Posted by biz4two
Does this mean that the D.U.I. from http://www.performancedistributors.com/forddui.htm does not have the vacuum advance? If not, then how do you set the advance?
Thanks...
Thanks...
And yes, they have vacuum advance. Look at the picture!
