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Re: /6 Holley 390 jets
[Re: wings471]
#986604
05/05/11 02:50 PM
05/05/11 02:50 PM
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Joined: Mar 2007
Posts: 3,277
West Coast, USA
jbc426
master
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master
Joined: Mar 2007
Posts: 3,277
West Coast, USA
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The best way is to read your plugs or get a data logging wide band. FAST has a nice one for just over $400. It's portable so you can do a bunch of cars. Here's a good page on plug reading on FBO's website. http://www.4secondsflat.com/Spark_plug_reading.htmlMake sure your float level is set correctly. Also, did you shorten up the mechanical advance slots in the distributor? Slanty's like significantly more initial, but not more total ignition advance. The difference the distributor recurving makes in a slant is unbelievable. Are you still running points?
1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's
1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
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Re: /6 Holley 390 jets
[Re: jbc426]
#986605
05/05/11 03:11 PM
05/05/11 03:11 PM
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Joined: Mar 2005
Posts: 390
pacific northwest
wings471
OP
enthusiast
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OP
enthusiast
Joined: Mar 2005
Posts: 390
pacific northwest
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Quote:
The best way is to read your plugs or get a data logging wide band. FAST has a nice one for just over $400. It's portable so you can do a bunch of cars.
Here's a good page on plug reading on FBO's website.
http://www.4secondsflat.com/Spark_plug_reading.html
Make sure your float level is set correctly. Also, did you shorten up the mechanical advance slots in the distributor? Slanty's like significantly more initial, but not more total ignition advance. The difference the distributor recurving makes in a slant is unbelievable. Are you still running points?
No. I have electronic ignition. The float level is good, a/f is one turn out and the pv is new.
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Re: /6 Holley 390 jets
[Re: wings471]
#986606
05/05/11 04:20 PM
05/05/11 04:20 PM
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Joined: Mar 2008
Posts: 5,746
Ontario, Canada
Dodgem
master
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master
Joined: Mar 2008
Posts: 5,746
Ontario, Canada
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stock is the best staring point found this
R6299-1 4160 390 37-1539 37-933 6-506 122-50 34R9716-34 N/S N/S N/A 0.025
so if this it it 50's front and 34R9716-34 plate
another could be the old power valve is pooched
R6895 4150 390 37-1536 37-933 6-504 122-50 122-62 N/S N/S 125-85 0.025
Last edited by Dodgem; 05/05/11 04:22 PM.
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Re: /6 Holley 390 jets
[Re: Dodgem]
#986607
05/05/11 04:30 PM
05/05/11 04:30 PM
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Joined: Jan 2003
Posts: 5,902
Athens, Greece
Pyper70
master
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master
Joined: Jan 2003
Posts: 5,902
Athens, Greece
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I added a second metering block kit (I believe its a gasket, fuel lines, power valve, jets, longer screws and the metering plate. I wanted better adjustment procedures out of it. I think I put a power valve block off in the secondary circuit. Its been a long while. My biggest concern for the slant and the 390 was the bog...I fiddled around with the primary cam, accelerator pump excessively...never could get rid of it...Start with stock jets and move up from there.
Family owned 1969 Charger R/T DualQuad 440/727/GVO/3.55s
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