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carb tuning? video added
#1030753
07/12/11 01:21 AM
07/12/11 01:21 AM
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Joined: Nov 2004
Posts: 3,517
pacific northwest
Stroker Scamp
OP
master
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OP
master
Joined: Nov 2004
Posts: 3,517
pacific northwest
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so if the air gets better and your car doesnt improve does that mean its lean? explain your thoughts, thanks btw i run 84 jets square in a holley 950 no pv, car ets from 10.30 to a best of 10.14 no changes in tuning just weather
footbrake N/A SB 408 Scamp 10.10 @ 132 street/strip
73 Duster 340 street strip 12.79 @ 105
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Re: carb tuning?
[Re: toddd]
#1030759
07/14/11 11:04 PM
07/14/11 11:04 PM
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Joined: Jan 2003
Posts: 5,484
SoCal
Brian Hafliger
master
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master
Joined: Jan 2003
Posts: 5,484
SoCal
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seems like high rpm miss...hard to tell though.
Ever check valve springs for pressure?
Ever make a run and pull a plug? Any pics?
What's the jetting at now?
Spacer?
Do you run mufflers?
What plug?
Everything look good in the dist.?
Ever check ohms on plug wires?
What valve lash do you run?
Brian Hafliger
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Re: carb tuning?
[Re: Brian Hafliger]
#1030760
07/15/11 12:13 AM
07/15/11 12:13 AM
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Joined: Nov 2004
Posts: 3,517
pacific northwest
Stroker Scamp
OP
master
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OP
master
Joined: Nov 2004
Posts: 3,517
pacific northwest
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Plugs may have 20 runs on them
never pulled a plug after the run
jetting is 84 sq no pv
1"spacer
bullet mufflers
ngk 8's
went thru the dist, wires and springs when i was chasing the backfire
I forgot to add that i added an air pan and no air cleaner, didnt see any slopping of gas from turbulence, i think ill try to add a bit of jet and see what it does next weekend
footbrake N/A SB 408 Scamp 10.10 @ 132 street/strip
73 Duster 340 street strip 12.79 @ 105
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Re: carb tuning?
[Re: Stroker Scamp]
#1030763
07/15/11 12:32 AM
07/15/11 12:32 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Quote:
If you have a high rpm limiter...What is it set at?. I was having problems of it cutting in well before the # I had chosen.
What kind of ign box?
thats a thought msd 6al with a 7200 chip
Pull the high rev chip and try it without a chip...
I've had multiple chips act up.... I have also had
a 7-al give me a high rev miss.... just a light miss
but it was there.... I changed boxes and it was gone
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Re: carb tuning?
[Re: Stroker Scamp]
#1030765
07/15/11 12:48 AM
07/15/11 12:48 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Quote:
Quote:
Quote:
If you have a high rpm limiter...What is it set at?. I was having problems of it cutting in well before the # I had chosen.
What kind of ign box?
thats a thought msd 6al with a 7200 chip
Pull the high rev chip and try it without a chip...
I've had multiple chips act up.... I have also had
a 7-al give me a high rev miss.... just a light miss
but it was there.... I changed boxes and it was gone
did your miss sound like the one thats in my vid?
I didnt listen to it... I dont try to analyze a miss
over a computer speaker
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Re: carb tuning?
[Re: Stroker Scamp]
#1030766
07/15/11 12:50 AM
07/15/11 12:50 AM
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Joined: Jan 2003
Posts: 5,484
SoCal
Brian Hafliger
master
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master
Joined: Jan 2003
Posts: 5,484
SoCal
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That's very true Mike, and that could be why it's at high rpm only. Pull that chip out!
Brian Hafliger
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Re: carb tuning?
[Re: Cab_Burge]
#1030769
07/15/11 03:24 PM
07/15/11 03:24 PM
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Joined: Aug 2004
Posts: 2,128
sweden
sshemi
top fuel
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top fuel
Joined: Aug 2004
Posts: 2,128
sweden
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Im trying to remeber what caused my car to do the exact same thing. It was not my rev limiter turned it off and rpms were 8300  And it was not lean but maybe fat. Sh&% i cant remeber.
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Re: carb tuning?
[Re: sshemi]
#1030770
07/31/11 10:42 PM
07/31/11 10:42 PM
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Joined: Jun 2004
Posts: 334
Wi.
65_gt_rag_402
enthusiast
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enthusiast
Joined: Jun 2004
Posts: 334
Wi.
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you have a lean condition gong on when you put the air pan on ... it has turbulance and running lean. need to jet up or put the filter back on and try it. Had same condition on my dart. 
65 DART GT RAGTOP mopars "AWESOME" 360 magnum stoker 402 Engine !!!!!!! ROCKS !!!!!!!!!!
11.0's on pump gas .
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Re: carb tuning?
[Re: Stroker Scamp]
#1030772
08/02/11 03:25 AM
08/02/11 03:25 AM
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Joined: Sep 2003
Posts: 6,847
Missouri
StrokerPost
master
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master
Joined: Sep 2003
Posts: 6,847
Missouri
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Quote:
Quote:
you have a lean condition gong on
when you put the air pan on ... it has turbulance and running lean. need to jet up or put the filter back on and try it.
Had same condition on my dart.
put the air cleaner back on and seemed to help a bit but its still breaking up a bit, so the search goes on
Mike, is this "breaking up" all the time , only at WOT, or top end only? I ran into this a few years back on my Dart, tried jetting, diff plugs, redid all my ignition grounds, checked dizzy shaft for too much play, everything I could think of with no luck, even swapped in my back up 6AL. Then after reading an article about dizzy phasing I decided to check it out. Turns out it was firing JUST before the rotor moved past the electrode for any given cyl. So I corrected that and the breaking up or miss was gone. Mine was a topend miss just about the 1000' mark to the stripe. Just a thought. 
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The AFR on it are right at 12.8 to 13.3 AFR for the entire run now 
My intrepretations have alwyas been that if the car picks up when the air gets better the carb. jetting is fat 
IHTHs. BTW, I'm going to Woodburn in two weeks for the Mopar race so we will see what it does there now that it seems to have enough fuel supply for the entire run instead of running out from the starting line on like it was the last race there according to the wide ban 
I had a similar miss at the top of high gear that ended up being three spark plug wires, 4,6 and 8 
