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Old 12-31-2011, 01:38 PM
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403 olds

i have a lemans with a 403 olds out of a 79 olds i put a new 600 cfm holly and cant get the car to fire its blowing smoke and gas out the carb does this mean im 180 out on the distributor. it has new plugs wired counter clock on the cap with new wires any one help.

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Old 12-31-2011, 01:41 PM
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If you had the distributor out and changed the wires it more then likely is out of time or wires crossed up. JMO




Cole
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Old 12-31-2011, 01:48 PM
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Plus why give up on the QuadraJet?
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Old 12-31-2011, 01:58 PM
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dude q jets are junk in my book to hard to fix to hard to tune
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Old 12-31-2011, 02:03 PM
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Qjets are not junk and not hard to tune. They got a bad rep from the leaking plugs years ago but actually are pretty neat carbs. Recheck #1 TDC and firing order as well as direction of rotation if you are not used to GM stuff. It may just be way advanced.
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Old 12-31-2011, 09:42 PM
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let me explain an easy way to set ur timing find top dead center for number 1 cylinder drop in ur distrubutor having ur rotor point to the number one cylinder,then follow ur firing order from there.
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Old 12-31-2011, 11:04 PM
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i know how to do tdc this old motor has a 6 side distributor gear and it realy dont point at number 1 its past or befor number 1. I have it at past #1 going counter clock im going to check tdc again and set it befor counter clock and see what i get and i will also check the intake and make sure their is nothing down in their. Today i put like 24 oz of gas down the carb today and cranked it forever checked the plugs and only 5 6 and 8 had very little gas on them so alot of stuff still to check.
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Old 01-01-2012, 01:28 PM
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Quote:
Originally Posted by mafiacustomz
i know how to do tdc this old motor has a 6 side distributor gear and it realy dont point at number 1 its past or befor number 1. I have it at past #1 going counter clock im going to check tdc again and set it befor counter clock and see what i get and i will also check the intake and make sure their is nothing down in their. Today i put like 24 oz of gas down the carb today and cranked it forever checked the plugs and only 5 6 and 8 had very little gas on them so alot of stuff still to check.
First, the Olds distributor gear is like any other. The OIL PUMP DRIVESHAFT has six sides, but this is unrelated to how the distributor gear meshes with the cam. Once the distributor is in the block, you MIGHT have to rotate the engine slightly to get the oil pump driveshaft to line up so the distributor goes the rest of the way in.

By the way, the Qjet is arguably the most sophisticated 4bbl ever made. Those who claim it's junk usually don't have the patience or aptitude to learn how to tune it properly.
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Old 01-01-2012, 01:56 PM
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Quote:
Originally Posted by joe_padavano
By the way, the Qjet is arguably the most sophisticated 4bbl ever made. Those who claim it's junk usually don't have the patience or aptitude to learn how to tune it properly.
I agree Joe.
Here's some interesting reading on the 403....
http://www.mondellotwister.com/ArtUnsungH.htm
http://www.mondellotwister.com/Art403Olds.htm
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Old 01-01-2012, 03:48 PM
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i have 2 q jets sitting in my garage
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Old 01-01-2012, 04:50 PM
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If you are unable to tune it yourself or if you need parts....
http://www.cliffshighperformance.com/
"We build a Quadrajet that will run like itís fuel injected. We look at your entire drivetrain as a system. We completely rework your carb to suit your specific build, your car and the way you drive it."
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Old 01-01-2012, 11:06 PM
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no i think the qjet is not for me just dont like the way their built i can rebuild them if i wanted their just way dated im thinking of selling them later on down the road
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Old 01-02-2012, 01:55 AM
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Quote:
Originally Posted by techinspector1
I agree Joe.
Here's some interesting reading on the 403....
http://www.mondellotwister.com/ArtUnsungH.htm
http://www.mondellotwister.com/Art403Olds.htm
These articles are quite dated, and contain erroneous info(there are no solid main web 403's)

If youre interested in building a 403, sign up with some of the Olds sites online.

You can get correct up to date info and parts from a number of Olds engine specialists around the country.

BTR
Olds Perfromance
Rocket Racing
M&J Proformance
J&S Machine
Wise Performance

Joe Mondello's(RIP) Technical school is in Tennessee,
the Mondello Family has nothing to do with Mondello Performance in California

A correctly rebuilt Q-Jet would be the best set up, but if youre really set against it, then check into one of Holley's Q-jet replacement carbs. They are spreadbore design, come in 650 and 800 cfm(your stock Q-Jet is 800cfm), and are available in double pump or vacuum secondarys. Id suggest the vacuum secondaries, as they make more down low torque and also offer the most potential for higher MPGs when just cruising.
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