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Re: Edelbrock accelerator pump adjustment question
[Re: David_Trimble]
#1300660
10/22/12 08:13 PM
10/22/12 08:13 PM
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Joined: Jan 2003
Posts: 738 OK
David_Trimble
OP
super stock
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OP
super stock
Joined: Jan 2003
Posts: 738
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Update: I got ahold of a new vacuum gauge and retested the ported vacuum- I'm still getting ~13"Hg at idle like my old gauge was reading I'm not sure what to do at this point....
'69 Dodge Charger R/T
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Re: Edelbrock accelerator pump adjustment question
[Re: scratchnfotraction]
#1300664
10/23/12 09:59 AM
10/23/12 09:59 AM
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Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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You could try using manifold vacuum instead of ported & tuning it that way. Put vac adv on the drivers (manifold) port & setting initial with the vac gauge method (max vac then back off 1" in hg) & as you know on manifold the can will be maxed at idle. then shorten the slots for 35 total with the can capped. then adj springs for WOT then hookup/adj the can for part throttle high rpm/around town as previously described. You have nothing to lose at this point & if it dont work to your satisfaction then we can continue on in a different direction. EDIT 36-38 rather than 35 total with vac capped (I forgot we are working with a BB) and if it's a low compression 383 I'd suggest 38
Last edited by RapidRobert; 10/23/12 12:22 PM.
live every 24 hour block of time like it's your last day on earth
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Re: Edelbrock accelerator pump adjustment question
[Re: scratchnfotraction]
#1300666
10/25/12 07:26 PM
10/25/12 07:26 PM
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Joined: Jan 2003
Posts: 738 OK
David_Trimble
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super stock
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OP
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Posts: 738
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Ok, I set up the distributor to the manifold vacuum on the driver's side port with the passenger side plugged. I connected the vacuum gauge to the manifold itself thru the headlight door pickup port on the intake itself. After warmup I adjusted the advance until the vacuum read 19.5"Hg (max) then backed it off to 18.5". I'm running about 25deg advance with that @750rpm.
For grins, I disconnected the can (plugging the vacuum line with my spare gauge) and revved up the engine while watching the timing. At what I would guess around 3000rpm I was reading 40deg- didn't run it up higher than that (but it looked like it was maxing at 40). BTW it's a low comp 383 (low 9s I think) so since 38 is the target, I take it 40 is still a little high and I probably need to shorten the slots a bit more?
Also for grins I connected the spare gauge to the ported vacuum- I was reading 13"Hg off that while the other gauge was reading 18" straight from the manifold (NOT the driver's side manifold port)
I'm a little concerned with my initial 25degree setting- for a BB does that sound normal?
'69 Dodge Charger R/T
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Re: Edelbrock accelerator pump adjustment question
[Re: RapidRobert]
#1300669
10/27/12 05:03 PM
10/27/12 05:03 PM
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Joined: Jan 2003
Posts: 738 OK
David_Trimble
OP
super stock
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OP
super stock
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Posts: 738
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@Robert- a quick question but I still have that 'test' distributor cap on the distributor- the cap with the phasing hole cut in it. Do I need to check for anything else using that cap at this point or can I go ahead and swap it out for the new cap?
'69 Dodge Charger R/T
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