Why does my car stumble in the air?
#454577
08/30/09 02:26 PM
08/30/09 02:26 PM
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Joined: Aug 2003
Posts: 4,055 Salina ks
572_dup2
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Salina ks
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Would it help to put jet extenstions on? Carbs are sideways. Fuel pressure is 6 1/2 an use 4 port magna fuel. Or just maybe set the floats little higher? An thoughts? Thanks
Shawn Jennings
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Re: Why does my car stumble in the air?
[Re: 408strokerdart]
#454579
08/30/09 02:45 PM
08/30/09 02:45 PM
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Joined: Aug 2003
Posts: 4,055 Salina ks
572_dup2
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It does it on every pass just before i shift into 2nd. If it did it once or twice maybe think its a fluck. Do you think fuel pressure needs turned up too?
Shawn Jennings
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Re: Why does my car stumble in the air?
[Re: Al_Alguire]
#454582
08/30/09 03:12 PM
08/30/09 03:12 PM
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Joined: Aug 2003
Posts: 4,055 Salina ks
572_dup2
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Best 60's ever all 1.28s. Got the bump stops set as tight as im gunna set them. Leaves the best around 2000rpm. Sounds like an feels like its starved for fuel right before 2nd an then after i shift it takes it a little time to recover. I have video i will show as soon as the get it to me.
Shawn Jennings
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Post deleted by Defbob
[Re: 572_dup2]
#454583
08/30/09 03:36 PM
08/30/09 03:36 PM
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Anonymous
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Anonymous
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Re: Why does my car stumble in the air?
#454584
08/30/09 03:39 PM
08/30/09 03:39 PM
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Joined: Jun 2004
Posts: 1,217 Wellington, FL
cudabunch
pro stock
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pro stock
Joined: Jun 2004
Posts: 1,217
Wellington, FL
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What fuel pump are you using and is there a air filter on the carbs ?
Last edited by cudabunch; 08/30/09 03:40 PM.
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Post deleted by Defbob
[Re: 572_dup2]
#454585
08/30/09 03:59 PM
08/30/09 03:59 PM
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Anonymous
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Anonymous
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Re: Why does my car stumble in the air?
[Re: 572_dup2]
#454587
08/30/09 04:13 PM
08/30/09 04:13 PM
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Joined: Jun 2003
Posts: 9,225 Charleston
sixpackgut
Drag Week Mod Champion
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Drag Week Mod Champion
Joined: Jun 2003
Posts: 9,225
Charleston
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standard floats will close the needle and seat when fuel sloshes back
Gen 3 power 6.22@110, 9.85@135 Follow @g3hemiswap on instagram
performance only racing, CRT, ultimate converter, superior design concepts, ThumperCarbs
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Re: Why does my car stumble in the air?
[Re: MegaDart]
#454589
08/30/09 04:29 PM
08/30/09 04:29 PM
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Joined: Jan 2003
Posts: 19,363 Las Vegas
Al_Alguire
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 19,363
Las Vegas
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How long and high is it in the air? Maybe it is possible you are up long and high enough to uncover the front jets in carb long enough to cause and issue. Maybe some sort of modified jet extensions are in order? Have you watched the fuel pressure to see what it is doing? I know that is easier said than done while driving a car in the air but might take a peak.
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: Why does my car stumble in the air?
[Re: Al_Alguire]
#454590
08/30/09 04:58 PM
08/30/09 04:58 PM
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Joined: Aug 2003
Posts: 4,055 Salina ks
572_dup2
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Back On The Bumper!!
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Dont think its a voltage thing. Im back to 2 battires now.
Fuel pressure in high gear is around 6 61/4. But it dont now what fuel pressure is off the line?
Im going to cut 2 holes in the front of the cowl to let some air in. Its a piece of trash in high gear. Runs less MPH than it did before, but the 60' is best 1/8 mph is up some an 1/8 et is getting better. This should fell like afterburners kicking in!
Shawn Jennings
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Re: Why does my car stumble in the air?
[Re: 572_dup2]
#454592
08/30/09 05:17 PM
08/30/09 05:17 PM
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Joined: Feb 2005
Posts: 20,173 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,173
PA.
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Shawn how close are your carbs to the top of your hood scoop? I had to take my tunnel ram off because mine were to close and would shut off air flow to the carbs.
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27
Livin and lovin life one day at a time
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Re: Why does my car stumble in the air?
[Re: Cab_Burge]
#454593
08/30/09 05:17 PM
08/30/09 05:17 PM
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Joined: Aug 2003
Posts: 4,055 Salina ks
572_dup2
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Salina ks
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could be possible? But we didnt see any sign of fuel coming out? It fells like it starts this when the car is at its highest. But it happens so fast sometimes i forget. LOL
Im hoping the video shows signs of whats happening.
Shawn Jennings
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