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 Post subject: Re: 1972 Dodge Colt
PostPosted: Sat Mar 04, 2023 6:44 am 
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Triple Duece Weber
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Joined: Tue Nov 23, 2004 6:05 pm
Posts: 2271
Location: Desoto Texas
Car Model: 1972 Dodge Colt
Rick
First time I started it with the new low pressure Holley regulator (1-4 PSI) the gauge showed 1 PSI.
Second day I started it the gage showed 4 and went up slightly on it's own, no attempt to adjust it.
Yesterday I put a wrench to the adjustment and it would only go up, not down.
I moved it from the 4-5 it started at to 6 and just quit screwing with it.

It felt like the regulator was in the lowest pressure setting and when I turned the allen screw it just went up.
I could get back to the lowest pressure the gauge showed initially, but never any lower.

Now we had a huge storm between the first start and second starts,
So did the Barometer effect the gauge?
There is a little rubber plug they say to clip the tang after install.
I did that on the spare one I had and the oil filled started leaking out, so that sucked!
I have found another gauge, might buy that and see.
Either that or an electric style.

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 Post subject: Re: 1972 Dodge Colt
PostPosted: Sat Mar 04, 2023 7:09 am 
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SL6 Racer & Moderator
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Joined: Sat Oct 19, 2002 12:06 pm
Posts: 8707
Location: Silver Springs, Fl.
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Just a FYI. I don't like the Holly style "deadhead" pressure regulators. At low pressures they don't seem to have good control. At low fuel flow they have a tendency to have pressure creep. I loke the return flow regulators.

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 Post subject: Re: 1972 Dodge Colt
PostPosted: Sat Mar 04, 2023 7:59 am 
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Triple Duece Weber
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Joined: Tue Nov 23, 2004 6:05 pm
Posts: 2271
Location: Desoto Texas
Car Model: 1972 Dodge Colt
Well this is the THIRD regulator I have purchased and installed.
2 Holley units and 1 Redline unit.
And 2 different Holley pumps so I am well down the road with fuel parts and pieces.
Looks like this Aeromotive gauge might be the solution.
This has a compensation valve on it that seems to be well thought out.
https://www.pegasusautoracing.com/produ ... ecID=26998

The pressure seems to be stable, just a different value on different days.

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 Post subject: Re: 1972 Dodge Colt
PostPosted: Sat Mar 04, 2023 9:32 am 
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Joined: Thu Oct 17, 2002 7:27 pm
Posts: 14491
Location: Park Forest, Illinoisy
Car Model: 68 Valiant
My experience has been the small oil filled gauges are junk.

I had a good Autometer oil filled fuel pressure gauge on my red car when I was spraying it. I found out it was very inaccurate if the sun was shining on it.

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 Post subject: Re: 1972 Dodge Colt
PostPosted: Sat Mar 04, 2023 9:48 am 
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Triple Duece Weber
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Joined: Tue Nov 23, 2004 6:05 pm
Posts: 2271
Location: Desoto Texas
Car Model: 1972 Dodge Colt
Thanks Dennis.
How are you doing?

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 Post subject: Re: 1972 Dodge Colt
PostPosted: Sat Mar 04, 2023 10:20 am 
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Board Sponsor & SL6 Racer

Joined: Wed Oct 23, 2002 7:57 pm
Posts: 8672
Location: Waynesboro, Pa.
Car Model: 65 Valiant 2Dr Post
Since the Webers like low pressure of @ 2.75-3#, I purchased the Carter Low pressure high volume pump. And I run the Holley dead head fuel pressure regulator that is specifically for 1-4# pressure. I have never seen my pressure moving around hardly at all. I use an Earls pressure gauge ( non liquid filled)

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 Post subject: Re: 1972 Dodge Colt
PostPosted: Sat Mar 04, 2023 10:39 am 
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Triple Duece Weber
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Joined: Tue Nov 23, 2004 6:05 pm
Posts: 2271
Location: Desoto Texas
Car Model: 1972 Dodge Colt
Thanks Rick
I have spent mucho money and time even before I added the Webers.
I have the low pressure Holley pump now.
I was thinking mounted on the engine the liquid filled gauge would be a good idea.
More trouble than it has been worth to this point.

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 Post subject: Re: 1972 Dodge Colt
PostPosted: Sat Mar 04, 2023 12:28 pm 
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Joined: Thu Oct 17, 2002 7:27 pm
Posts: 14491
Location: Park Forest, Illinoisy
Car Model: 68 Valiant
Quote:
Thanks Dennis.
How are you doing?
Still kicking. :)

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 Post subject: Re: 1972 Dodge Colt
PostPosted: Fri Apr 07, 2023 7:57 pm 
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Triple Duece Weber
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Joined: Tue Nov 23, 2004 6:05 pm
Posts: 2271
Location: Desoto Texas
Car Model: 1972 Dodge Colt
Finally got out to test, weather has been a little unpredictable lately.

Good news:
Front brakes are great, did the first real burnout tonight.
Trans leak is fixed, no more drip.
Head gasket is fixed, no leaks.
Electronic ignition dist. seems to work real well.
Fuel pressure was rock solid at 3 PSI.

Not much news:
Timing change hasn't seemed to make much difference.
Moving cam back a few degrees didn't seem to effect performance.
Can't really tell if the clutch tamer is doing what it's supposed to do.

Bad news:
The great Weber experiment is over for the time being.
It coughed on clutch dump and fell on it's face.
Then picked up and went on about it's business.
Colt wasn't any faster today.


And not sure if bad or good, but I did get my first Red light!
HAd not left early in any either earlier pass.

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 Post subject: Re: 1972 Dodge Colt
PostPosted: Fri Apr 07, 2023 8:10 pm 
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Joined: Thu Oct 17, 2002 7:27 pm
Posts: 14491
Location: Park Forest, Illinoisy
Car Model: 68 Valiant
Congrats on getting it out buddy! :mrgreen:

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 Post subject: Re: 1972 Dodge Colt
PostPosted: Sat Apr 08, 2023 6:16 am 
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Supercharged
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Joined: Sat Nov 27, 2004 8:03 pm
Posts: 9496
Location: IRWIN PA
Car Model:
Hi Stan,
I would *think* that tuning the webers is like tuning a four barrel x 6 to get each throat maximised for its intended usage.

You just need to get a lot of passes to sort all of that stuff out, especially with adding the clutch tamer.

You have a logbook/computer spreadsheet keeping track of all data on every run?

Does your local track run TNT slow or can you get more than 3 runs in a 6 hour period?

Greg

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 Post subject: Re: 1972 Dodge Colt
PostPosted: Sat Apr 08, 2023 8:14 am 
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Triple Duece Weber
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Joined: Tue Nov 23, 2004 6:05 pm
Posts: 2271
Location: Desoto Texas
Car Model: 1972 Dodge Colt
Thanks Zilla

Greg, no logger.
Deb tries to video every run and then I log in my record book.
The track was not too busy last night, I could have run more, but I was done.
No sense beating on it.

Not sure where to go with the Webers right now.
Plug readings are pretty close.

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 Post subject: Re: 1972 Dodge Colt
PostPosted: Sat Apr 08, 2023 9:48 am 
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Board Sponsor & SL6 Racer

Joined: Wed Oct 23, 2002 7:57 pm
Posts: 8672
Location: Waynesboro, Pa.
Car Model: 65 Valiant 2Dr Post
Quote:
It coughed on clutch dump and fell on it's face.
Then picked up and went on about it's business.
What RPM?

My Webers are fine as long as I leave with the rpm above 2000-2200.That is with a 4000 convertor. I feel certain that this low rpm stumble could be easily adjusted out, but I never need to leave at 2000 rpm. I would suspect that you are going to need to leave somewhere above 4000 rpm.

The Webers pull like a freight train when tuned properly. I will never go back to a 4 barrel especially for racing. :D

What does the A/F look like?

Everyone tells me that reading plugs is a giant waste of time. I don't know. :?:

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 Post subject: Re: 1972 Dodge Colt
PostPosted: Sat Apr 08, 2023 10:03 am 
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Triple Duece Weber
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Joined: Tue Nov 23, 2004 6:05 pm
Posts: 2271
Location: Desoto Texas
Car Model: 1972 Dodge Colt
Thanks Rick
I have no A/F meter, I would need to data log it to make sense of the readings.
I left at 3-3500 rpm on the stumble.
Flat on it's face and then off she went.
It pulls ok, not sure what hard feels like anymore.
It seemed to flaten out at the top of 3rd yesterday, didn't catch the RPM on the shift.
I think you can appreciate a 4 speed car and an automatic are pretty different animals.
I have not given up, that just is not me.
I just want to get going faster right now.
I hate it when those Junior Dragsters pass me in the lights and then pop the chute! LOL

And yes plug reading is a question, but not fuel fouled, black, or funky.

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 Post subject: Re: 1972 Dodge Colt
PostPosted: Sat Apr 08, 2023 11:08 am 
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Board Sponsor & SL6 Racer

Joined: Wed Oct 23, 2002 7:57 pm
Posts: 8672
Location: Waynesboro, Pa.
Car Model: 65 Valiant 2Dr Post
Quote:
I have no A/F meter, I would need to data log it to make sense of the readings.
I left at 3-3500 rpm on the stumble.
You really need an A/F gauge. At least to know your wide open throttle A/F is in the proper range. And you will need that even if you go back to a 4 -barrel.

I still think after you know the A/F is close, you will need to launch above 4000 rpm. Once the car is launched and begins to move, the Webers have no idea whether you have a clutch or a torque convertor. :D :D

Just as a reference; Ryan launched his 3200# Dart Swinger on slicks many times and it took over 4000 rpm to get that much weight moving, even with 4.30 gears and a 3.09 first gear.

Your lightweight car is built for this. Cut er loose and hold on! :D :D

Good luck Stan!

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