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Re: holley 3310 tuning/ adjustments?
[Re: jensenguy]
#438930
08/15/09 03:07 PM
08/15/09 03:07 PM
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Joined: Jan 2003
Posts: 5,443
Indiana
YO7_A66
master
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master
Joined: Jan 2003
Posts: 5,443
Indiana
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Before you start with the carb, can you tell us what the initial timing (at idle) and what is the total timing? Carb Basics: Do you have a vacuum gage? Does the car have a tach? Try spraying starter fluid or carb cleaner around the intake/carb base to see if there are any vacuum leaks. If the idle rpms change, fix the leaks before tuning the carb. The above are just some basic things to check before digging into the carb adjustments. Once everything is ready, then we can help you out with the carb tuning. 
1970 YO7 A66 [Canadian Export] F8 Challenger
340 (Currently in shop for stroker assy.)
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Re: holley 3310 tuning/ adjustments?
[Re: YO7_A66]
#438931
08/15/09 03:13 PM
08/15/09 03:13 PM
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Joined: Sep 2003
Posts: 372
Ohio
jensenguy
OP
enthusiast
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OP
enthusiast
Joined: Sep 2003
Posts: 372
Ohio
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Quote:
Before you start with the carb, can you tell us what the initial timing (at idle) and what is the total timing?
Carb Basics: Do you have a vacuum gage?
Does the car have a tach?
Well Ive got the initial timing set a 10 btdc. As far as total timing goes, I really dont know, I cant really check that with just the stock timing mark tab can I? Also Im reluctant to change the timing too far from where I am, I had a ton of trouble starting the engine at first (for break-in) and Ive finally found the sweet spot that starts and runs quickly.
I do have a tach, but Ill have to do some searching for a vacuum gauge.
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Re: holley 3310 tuning/ adjustments?
[Re: jensenguy]
#438932
08/15/09 03:38 PM
08/15/09 03:38 PM
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Joined: Mar 2005
Posts: 1,373
Rancho Cucamonga, CA
D_C
pro stock
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pro stock
Joined: Mar 2005
Posts: 1,373
Rancho Cucamonga, CA
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Holley.com has a great tech section complete with YouTube videos. Holley Tech Service Holley TV website Make sure you check out the "Common Questions" and "Tech Library" topics. There are some important "Basics" you should learn and understand and they are really not all that difficult: * Importance of Correct Fuel-Level Adjustment * Power-Valve Selection * Accelerator-Pump - Lever-Adjustment, Squirter-Size, cam * Idle Circuit Mixture & Secondary Idle Set-Screw Adjustment 
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Re: holley 3310 tuning/ adjustments?
[Re: RapidRobert]
#438934
08/15/09 04:28 PM
08/15/09 04:28 PM
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Joined: Sep 2003
Posts: 372
Ohio
jensenguy
OP
enthusiast
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OP
enthusiast
Joined: Sep 2003
Posts: 372
Ohio
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Quote:
Quote:
As far as total timing goes, I really dont know, I cant really check that with just the stock timing mark tab can I? Also Im reluctant to change the timing too far from where I am,
yes dont change the timing till you find out where it is at now(for your baseline). Get a timing tape or measure/mark the dampener(.0632683" is (1) degree) so 2&1/4 would be 35.5 degrees(which'd be a nice conservative total(checked wo vac adv).
ok, I made a mark on my dampner as you suggested at 2 1/4". It looks like Im getting there, or very close to it at least. Probably 2500 - 3000 rpm, Im not sure I dont have a second person here right now.
So Im thinking my timing is at least close to where i need to be.
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Re: holley 3310 tuning/ adjustments?
[Re: SomeCarGuy]
#438936
08/15/09 04:54 PM
08/15/09 04:54 PM
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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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what cam? At idle how much vacuum & what idle speed, & (as mentioned) what PV & 1st (& easy to do) is to check your float levels.
live every 24 hour block of time like it's your last day on earth
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Re: holley 3310 tuning/ adjustments?
[Re: RapidRobert]
#438939
08/15/09 05:08 PM
08/15/09 05:08 PM
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Joined: Jul 2007
Posts: 531
Virginia
JimG
mopar
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mopar
Joined: Jul 2007
Posts: 531
Virginia
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Quote:
Quote:
You didn't mention the cam in the engine. If it's an aftermarket cam with more-than-stock valve overlap, you might need a lot more than 10* initial timing...like 15 to 18.
If that's the case, you might have the curb idle screw cranked too far open, exposing too much of the transition slot, causing the rich condition you describe.
 this is what we've been missing. thank you Jimmy
Robert:
'twern't nothin'!
If that is indeed an issue on the OP's car, I'll post the pics of my distributor slots that I shortened using JB Weld...which, by the way, are still holding up just fine.
Did I ever thank you for making me paranoid that they were gonna just fall out? 
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Re: holley 3310 tuning/ adjustments?
[Re: RapidRobert]
#438941
08/15/09 05:14 PM
08/15/09 05:14 PM
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Joined: Sep 2003
Posts: 372
Ohio
jensenguy
OP
enthusiast
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OP
enthusiast
Joined: Sep 2003
Posts: 372
Ohio
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Quote:
what cam? At idle how much vacuum & what idle speed, & (as mentioned) what PV & 1st (& easy to do) is to check your float levels.
Its got the Lunati Voodoo 60303 226/234 dur., .494/.513 lift. I was running the stock cam before the rebuild, and it was running pretty good with the carb setup the way it is still. I'll have to get a vacuum gauge for tomorrow, Im without one right now. Its idling around 7-800 rpm in park. Power valve, who knows, but I'd rather not take anything apart before lasting all my other options.
Ill start working on figuring out my float levels and go from there. Thanks guys!
Also should I try bumping my initial up to 15 or so and see what happens?
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Re: holley 3310 tuning/ adjustments?
[Re: RapidRobert]
#438943
08/15/09 05:19 PM
08/15/09 05:19 PM
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Joined: Jul 2007
Posts: 531
Virginia
JimG
mopar
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mopar
Joined: Jul 2007
Posts: 531
Virginia
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Quote:
Quote:
Also should I try bumping my initial up to 15 or so and see what happens?
yes then slow your idle speed
But don't hammer on it with the timing bumped up. If the engine likes the timing advanced (and I bet it does) you'll need to limit the mechanical advance to compensate.
Do you have any JB Weld? 
Jim
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Re: holley 3310 tuning/ adjustments?
[Re: jensenguy]
#438944
08/15/09 05:39 PM
08/15/09 05:39 PM
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Joined: Jan 2003
Posts: 5,439
So Cal
Sinitro
master
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master
Joined: Jan 2003
Posts: 5,439
So Cal
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Before punting..  Post back some of the specs.. Vacuum @ Idle. The Holley is super EZ to tune but it all starts with making sure no leaks, adequate inital (12 degrees) timing, and high enough vacuum (>10 inches). Then next going inside the Holley for possible revs for the power valve, nozzles and jets. Seems like the idle speed is a little low.. But do it a step @ a time, post back and we can help you more.. Just my $0.015.. 
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Re: holley 3310 tuning/ adjustments?
[Re: JimG]
#438945
08/15/09 05:47 PM
08/15/09 05:47 PM
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Joined: Sep 2003
Posts: 372
Ohio
jensenguy
OP
enthusiast
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OP
enthusiast
Joined: Sep 2003
Posts: 372
Ohio
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Quote:
Quote:
Quote:
Also should I try bumping my initial up to 15 or so and see what happens?
yes then slow your idle speed
But don't hammer on it with the timing bumped up. If the engine likes the timing advanced (and I bet it does) you'll need to limit the mechanical advance to compensate.
Do you have any JB Weld?
Jim
Well it definitely likes 15 degrees initial. Exhaust seemed to get a little cleaner, but still not right. So from what im putting together, if I leave my initial at 15 without modifying my distributor Ill have too much total timing? Is that right?
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Re: holley 3310 tuning/ adjustments?
[Re: RapidRobert]
#438948
08/15/09 06:02 PM
08/15/09 06:02 PM
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Joined: Jul 2007
Posts: 531
Virginia
JimG
mopar
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mopar
Joined: Jul 2007
Posts: 531
Virginia
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Quote:
Quote:
So from what im putting together, if I leave my initial at 15 without modifying my distributor Ill have too much total timing? Is that right?
yes you'll have to have your shop weld up the slots (there's a chart in the archives)
Archives, schmarkives!
Mopar Distributor Advance Slots
dist. degrees X 2 + initial= total
dist. degrees / slot size
6.............. .340
7............... .355
8............... .375
9............... .390
10.............. .405
11.5 ........... .420
12.............. .435
13.............. .445
14.............. .460
15.............. .475
16.............. .490
17.............. .505
18.............. .520
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so I expect you to start having problems any day now
