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Re: Should 500" stroker start easily on 91 pump gas
[Re: Blusmbl]
#1872757
07/18/15 05:42 AM
07/18/15 05:42 AM
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Joined: Jan 2003
Posts: 27,421 Balt. Md
383man
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,421
Balt. Md
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The lower octane rated fuel will burn faster and should be easier to start the eng on. I know in the colder weather in the winter my buddies 68 Cuda thats an 11.5 Indy headed 440 will start easier on the pump then it does on race fuel since the race fuel is slower burning. Course my 63 always starts easy on the 92 pump I run. Ron It's not just the octane- fuel purchased from a pump in the colder months in northern climates has better cold start characteristics than summer blend fuel. It's more volatile, even for the same octane rating. I agree as you are right. Ron
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Re: Should 500" stroker start easily on 91 pump gas
[Re: 68charger440strk]
#1873641
07/19/15 05:35 PM
07/19/15 05:35 PM
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Joined: Nov 2003
Posts: 440 SW pa
goldenlancer
mopar
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mopar
Joined: Nov 2003
Posts: 440
SW pa
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does the motor have a good ground?
N/SS
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Re: Should 500" stroker start easily on 91 pump gas
[Re: 68charger440strk]
#1873842
07/19/15 10:01 PM
07/19/15 10:01 PM
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Joined: Aug 2003
Posts: 43,715 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,715
Bend,OR USA
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Your deal, pump gas at your altitude, needs to be tuned on all the circuits properly to avoid the spark plug fouling your having Work on one circuit at a time, I would start on the idle circuit first, does your current carb. have four corner idle? If not try opening the rear throttle blades more to help lean out the front, close the fronts up to set the idle RPM I would probally restrict the idle fuel feed and the transition fuel feed holes into the main body to be about half the diameter the holes are now Carbs can be a pain in the butt But thier all tuneable You can fix it Do it one step at a time
Last edited by Cab_Burge; 07/19/15 10:01 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Should 500" stroker start easily on 91 pump gas
[Re: Cab_Burge]
#1873891
07/19/15 10:31 PM
07/19/15 10:31 PM
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Joined: Jul 2004
Posts: 19,318 State of confusion
Thumperdart
I Live Here
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I Live Here
Joined: Jul 2004
Posts: 19,318
State of confusion
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Your deal, pump gas at your altitude, needs to be tuned on all the circuits properly to avoid the spark plug fouling your having Work on one circuit at a time, I would start on the idle circuit first, does your current carb. have four corner idle? If not try opening the rear throttle blades more to help lean out the front, close the fronts up to set the idle RPM I would probally restrict the idle fuel feed and the transition fuel feed holes into the main body to be about half the diameter the holes are now Carbs can be a pain in the butt But thier all tuneable You can fix it Do it one step at a time Hey Cab, on 4150`s I noticed that opening the secondaries can actually make em richer if you expose the t-slot which I generally do NOT do but, there`s a fine line and although I set up Dominators square to start, not the same w/4150`s. I personally set the primary w/a square t-slot then just crack the secondaries and adjust from there.....HOT.....running temp has the final 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: Should 500" stroker start easily on 91 pump gas
[Re: Cab_Burge]
#1874530
07/20/15 07:49 PM
07/20/15 07:49 PM
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Joined: Apr 2013
Posts: 16 colorado
68charger440strk
OP
member
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OP
member
Joined: Apr 2013
Posts: 16
colorado
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Your deal, pump gas at your altitude, needs to be tuned on all the circuits properly to avoid the spark plug fouling your having Work on one circuit at a time, I would start on the idle circuit first, does your current carb. have four corner idle? If not try opening the rear throttle blades more to help lean out the front, close the fronts up to set the idle RPM I would probally restrict the idle fuel feed and the transition fuel feed holes into the main body to be about half the diameter the holes are now Carbs can be a pain in the butt But thier all tuneable You can fix it Do it one step at a time I was out of town all weekend. I have had the slots at all reasonable positions. It is a two corner carb. I think my throttle shaft is so sloppy that the exposure of the slots changes every time I blip the throttle. It runs great off idle and no dead spots, so it is just the idle circuit that is a problem.
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Re: Should 500" stroker start easily on 91 pump gas
[Re: 68charger440strk]
#1877215
07/24/15 01:05 PM
07/24/15 01:05 PM
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Joined: Jul 2004
Posts: 19,318 State of confusion
Thumperdart
I Live Here
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I Live Here
Joined: Jul 2004
Posts: 19,318
State of confusion
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Your deal, pump gas at your altitude, needs to be tuned on all the circuits properly to avoid the spark plug fouling your having Work on one circuit at a time, I would start on the idle circuit first, does your current carb. have four corner idle? If not try opening the rear throttle blades more to help lean out the front, close the fronts up to set the idle RPM I would probally restrict the idle fuel feed and the transition fuel feed holes into the main body to be about half the diameter the holes are now Carbs can be a pain in the butt But thier all tuneable You can fix it Do it one step at a time I was out of town all weekend. I have had the slots at all reasonable positions. It is a two corner carb. I think my throttle shaft is so sloppy that the exposure of the slots changes every time I blip the throttle. It runs great off idle and no dead spots, so it is just the idle circuit that is a problem. Why not buy a billet base plate?
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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