Hesitation ??
#1736726
01/23/15 03:12 AM
01/23/15 03:12 AM
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Joined: Nov 2004
Posts: 3,517 pacific northwest
Stroker Scamp
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pacific northwest
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Can an ignition issue cause the motor to stall or hesitate on a rapid full throttle whack? Reason I ask is I have tried 3 different carbs on the same motor (stockish 340)same results. The new carb is a 750 DP, been tuning it and its getting better but I think some thing else may be the culprit
footbrake N/A SB 408 Scamp 10.10 @ 132 street/strip 73 Duster 340 street strip 12.79 @ 105
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Re: Hesitation ??
[Re: Stroker Scamp]
#1736729
01/23/15 12:07 PM
01/23/15 12:07 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
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Master
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Romeo MI
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You make sure that the timing is set right first... then start on the carb.. make sure the pump arm and pump start a shot when you move the throttle.. then its how much
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Re: Hesitation ??
[Re: Crizila]
#1736734
01/24/15 05:45 AM
01/24/15 05:45 AM
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Joined: Jan 2003
Posts: 32,394
Quicktree
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you could put 10 carbs, if the pump shot is not right it will do the same thing. timing should be set and right before you adjust the carb.
I went with the odds! 10 Carbs with focked up pump shots would be - rare.
sure you did, the chances of any carb being right the first time for any given combo unless it's specifically set up for it are slim I would think.
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Re: Hesitation ??
[Re: Thumperdart]
#1736736
01/24/15 01:21 PM
01/24/15 01:21 PM
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Joined: Jan 2003
Posts: 32,394
Quicktree
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you could put 10 carbs, if the pump shot is not right it will do the same thing. timing should be set and right before you adjust the carb.
I went with the odds! 10 Carbs with focked up pump shots would be - rare.
sure you did, the chances of any carb being right the first time for any given combo unless it's specifically set up for it are slim I would think.
Maybe in days of old AND some new where the brilliant whackos added more holes than swiss cheese and you musta missed the last thank you post. Bolted it on and raced NO adjustments...............Doesn`t happen everyday but when set up PROPERLY they can be real close. Too bad you didn`t send me yours so you could experience the same things.......
lol I don't have any problems with mine. it runs great and repeats
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Re: Hesitation ??
[Re: Quicktree]
#1736737
01/24/15 01:26 PM
01/24/15 01:26 PM
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Joined: Jul 2004
Posts: 19,317 State of confusion
Thumperdart
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I Live Here
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Posts: 19,317
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That`s what most "Bracket racers" say...............
72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
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Re: Hesitation ??
[Re: Thumperdart]
#1736741
01/24/15 08:07 PM
01/24/15 08:07 PM
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Joined: Jan 2003
Posts: 32,394
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If your running a power valve with too low a number will do that. I like them 1.5 under in gear idle vacuum. Seems now days where carbs used to come with 6.5's or higher they are 4.5 helps take tunning for dummies with a cam out of equation.
NEGATIVE..........Doesn`t work that way unless you`re WAY into the transition on the primaries cos when the idle`s correct you can remove the jets w/no change. As far as p/v sizing, take a drive at a steady rate or slight load, look at that # then maybe drop down 1-2 for power enrichment..........
negative that method is for street driving, doesn't work well for a race car. it can and will cause a hesitation. the 1-1.5 HG below idle in gear works best for any race car I have seen. I usually don't run PV's don't need them
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Re: Hesitation ??
[Re: Quicktree]
#1736742
01/26/15 02:45 AM
01/26/15 02:45 AM
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Joined: Nov 2004
Posts: 3,517 pacific northwest
Stroker Scamp
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Well didn't have much time today, but took the Duster for a drive still have the full throttle whack hesitation and I have what sounds like a lean miss fire at 2500 RPM pretty sure this is all not carb related. Not sure where to look next except ignition
footbrake N/A SB 408 Scamp 10.10 @ 132 street/strip 73 Duster 340 street strip 12.79 @ 105
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