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Help me with bogging at full throttle and hard starts #969712
04/09/11 02:58 AM
04/09/11 02:58 AM
Joined: Jan 2003
Posts: 659
Regina, SK, Canada
charger Offline OP
mopar
charger  Offline OP
mopar

Joined: Jan 2003
Posts: 659
Regina, SK, Canada
Hey guys,

So I got the Chrysler running today for the season. I changed the oil out and put in a set of new plugs and then took it for a drive.

First off, I've always had this problem ever since te car was set up for Nitrous by a friend of mine. The thing takes foree to warm up enough that I don't have to feather the gas to keep it running, maybe after 8-10 minutes of feathering the gas, the engine will finally idle.

In park or in neutral, the mtor responds fine o throttle and everyhing seems ok.

This part is new, on the road from a dead stop if I nail the gas, the engine bogs for what feels like forever and then finally takes off; and then when I let off the motor almost dies unless I flutter the gas with my foot a bit.

Anyone have any ideas what's going on? Or any ideas I can try? I remember that the motor used to start a lot easier before the car was set up for nitrous.

Motor is 446CI, stock Edelbrock heads, Performer RPM, Quickfuel carbs holley 750, Mopar Billet distributor, good wires, spark plugs gapped at .050, MSD Blaster 2 coil, MSD6AL ignition..any other info, please let me know.

Re: Help me with bogging at full throttle and hard starts [Re: charger] #969713
04/09/11 04:07 AM
04/09/11 04:07 AM
Joined: Apr 2008
Posts: 301
California
C
court9155 Offline
enthusiast
court9155  Offline
enthusiast
C

Joined: Apr 2008
Posts: 301
California
Could be a lot of things but this issue sounds like float level to me.

Also, did your friend block the power valve and square the jets when he "nitrous" tuned it? That may be another issue.

Dan


67 charger
Re: Help me with bogging at full throttle and hard starts [Re: court9155] #969714
04/09/11 08:52 AM
04/09/11 08:52 AM
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
R
RapidRobert Offline
Circle Track
RapidRobert  Offline
Circle Track
R

Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
lean choke A/P P/V jets vac leak


live every 24 hour block of time like it's your last day on earth
Re: Help me with bogging at full throttle and hard starts [Re: RapidRobert] #969715
04/09/11 04:21 PM
04/09/11 04:21 PM
Joined: Jan 2003
Posts: 659
Regina, SK, Canada
charger Offline OP
mopar
charger  Offline OP
mopar

Joined: Jan 2003
Posts: 659
Regina, SK, Canada
Carb has no choke; and the vacuum advance from the distributor is not hooked up. Only thing using vacuum is the brake booster which seemed good...should I redo the timing? Ran fine in the fall with old plugs

Re: Help me with bogging at full throttle and hard starts [Re: charger] #969716
04/09/11 06:01 PM
04/09/11 06:01 PM
Joined: Feb 2005
Posts: 5,221
Branson, Mo.
J
joedust451 Offline
super gas
joedust451  Offline
super gas
J

Joined: Feb 2005
Posts: 5,221
Branson, Mo.
Quote:

Carb has no choke; and the vacuum advance from the distributor is not hooked up. Only thing using vacuum is the brake booster which seemed good...should I redo the timing? Ran fine in the fall with old plugs




If the timing curve is not set right for the combo & is set at the factory timing curve, "NOT" running the vacuum advance is killer, meaning it'll bogg/fart/poo/crappy excell. ect., get the hint


75 Duster, 451 10.87 @ 123.58 NA 97 Z28 6sp., 12.01 @ 115 on a 100 shot 71 Swinger. 360 magnum. 12.58 @ 105 78 cutlass, 469 BBC. 12.70 @ 108 on street tires. http://www.youtube.com/watch?v=Z2kqNmMfheU
Re: Help me with bogging at full throttle and hard starts [Re: charger] #969717
04/09/11 06:50 PM
04/09/11 06:50 PM
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
R
RapidRobert Offline
Circle Track
RapidRobert  Offline
Circle Track
R

Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
Quote:

First off, I've always had this problem ever since te car was set up for Nitrous by a friend of mine. Anyone have any ideas what's going on? I remember that the motor used to start a lot easier before the car was set up for nitrous.


Find out/post what changes he made (or had you make). Plus it ran Ok w the old plugs (I'm assuming that was b 4 the nitrous mods)


live every 24 hour block of time like it's your last day on earth
Re: Help me with bogging at full throttle and hard starts [Re: charger] #969718
04/09/11 09:07 PM
04/09/11 09:07 PM
Joined: Mar 2008
Posts: 5,746
Ontario, Canada
Dodgem Offline
master
Dodgem  Offline
master

Joined: Mar 2008
Posts: 5,746
Ontario, Canada
I would bet you buddy turned the timing a way back for the NOS.

A retard that is activated with the NOS would be a better system


Re: Help me with bogging at full throttle and hard star [Re: Dodgem] #969719
04/10/11 06:13 PM
04/10/11 06:13 PM
Joined: Dec 2004
Posts: 10,552
Rittman Ohio
fourgearsavoy Offline
I Live Here
fourgearsavoy  Offline
I Live Here

Joined: Dec 2004
Posts: 10,552
Rittman Ohio
You need to first find out where your base and total timing is set and go from there.I have also seen guys hook up the magnetic pick-up wires backwards causing ill performance
Gus


64 Plymouth Savoy
493 Indy EZ's by Nick at Compu-Flow
5-Speed Richmond faceplate Liberty box
Dana 60






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