nutup
Junior Member
Posts: 71
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Post by nutup on Jul 16, 2012 17:45:44 GMT -6
What do I need to change in my fuel system to run Alcohol from VP 113 oxygenated and will there be a gain in performance the 113. It is a good fuel but pricey I have a aeromotive 2000 pump with the bypass on pump and regulated just before carb
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Post by sg3526 on Jul 16, 2012 19:53:04 GMT -6
What do I need to change in my fuel system to run Alcohol from VP 113 oxygenated and will there be a gain in performance the 113. It is a good fuel but pricey I have a aeromotive 2000 pump with the bypass on pump and regulated just before carb My son switches from Methanol to gas all the time and we use the Aeromotive A-2000 pump as well. Only adjustment we make is the fuel pressure. |
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Post by 69b1dart on Jul 22, 2012 2:37:08 GMT -6
so what fuel pressure does alky likes and what about plugs
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Post by dennismopar73 on Jul 22, 2012 5:32:09 GMT -6
carb set up for alcohol would be needed!!
pressure runs pretty close, volume is the difference.
you can run the same plugs, , some will change to a colder plug,
I run 9---9 1/2 # ,,, at 10# I run the bowl over
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Post by bracketracing on Jul 22, 2012 10:59:57 GMT -6
carb set up for alcohol would be needed!! pressure runs pretty close, volume is the difference. you can run the same plugs, , some will change to a colder plug, I run 9---9 1/2 # ,,, at 10# I run the bowl over With a good flowed carb you run 7 lbs. more than that could bend floats or so I was told by my carb guy |
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Post by dennismopar73 on Jul 22, 2012 18:53:56 GMT -6
IDONO about how much it takes to bend a float arm, I run as much pressure as I can till the floats blow over, then back it off 1/4 turn, it says between the 9-91/2 mark never had any issues, nor have I had to change it!
We have run the same Dominator for couple years, I have a 750 done by Ken Jones, Never issue,, IDONO?
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Post by sg3526 on Jul 23, 2012 6:26:36 GMT -6
I run NGK 4554 plugs and as far as fuel pressure I usually run 11-12 #'s for alcohol and 6-7#'s for gas. If you have your carb set up right you can get away with that much fuel pressure but it takes good floats and good needles and seats to do it. I turn the pump on to fill the bowls and then turn it off and start the car and don't turn the pump back on until the motor is running. And before I get bashed for running that much fuel pressure I have been doing the same thing since 1989 and it works for me and I've never had an issue. When I bought my Ken Jones carb he said to only run 7 PSI, it fell on it's ass on the top end kick the pressure up and it's fixed. I run an Aeromotive A-2000 pump and one of their 4 port regulators and have been since 1999, one of the best pumps I have ever owned. So I guess what I'm trying to say is you will have to experiment with your individual set up to see what it likes, don't go by what other people say what you need to do but it can be helpful to get your baseline set up and tweak it from there.
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Post by carbman1 on Jul 23, 2012 11:17:12 GMT -6
Your fuel system should be fine you should run 25 lbs from the pump and 7 - 7 1/2 at the carb(these pressures are with the car running). Use a known accurate gauge, do not trust liquid filled gauges. The proper heat range spark plug for methanol is NGK 7's or 8's gapped at .030 (with NGK plugs the higher the # the colder the plug). you will allways use a hotter plug with methanol. make sure your timing is locked (no mechanical advance) if you need any more imfo give me a call 618 533 5605
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Post by 69b1dart on Jul 23, 2012 12:50:41 GMT -6
if i run 11lbs my fuel would be running out the vents and filling the cylinders with fuel,i run 4554 plugs now as i did with gas,but run alky now,do i need to go up or down on this number my timing is at 38
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Post by sg3526 on Jul 23, 2012 20:58:49 GMT -6
if i run 11lbs my fuel would be running out the vents and filling the cylinders with fuel,i run 4554 plugs now as i did with gas,but run alky now,do i need to go up or down on this number my timing is at 38 Plugs are fine and like Ken said start at 7 PSI and go up from there. I raised my floats a little and kicked the pressure up on mine but it's what works for me. As far as timing there are way to many variables to give any idea about that. On my 23 degree SBC I ran 42* on my 18* motors I run 34*. On my 540 BBC I run 34* but it has 23* heads on it. I have dyno'ed all of these motors and we made countless pulls changing the timing, jets, plugs and carb spacers. I run a 2" CNC'd 4 hole spacer on all my motors, made an average of 10 HP more. Generally as a rule of thumb bigger inch motors want less timing and better heads help a great deal as well, alcohol burns slower than gas that's why it makes more torque than gas does as a general rule of thumb. So most guys go up in timing usually 4-5* depending on engine size. As far as filling your cylinders with alcohol, you will if you run the pump while the engine isn't running. Run the pump for a few seconds to fill the bowls and start the motor then turn the pump on and make your adjustments from there. If you need help I will be at Gateway the 4th of August, look me up, I'll be more than happy to help out any way I can. |
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Post by 69b1dart on Jul 24, 2012 7:37:11 GMT -6
sg3526,ill be at gateway aug 4th,had to put my back up tranny till i can find someone to look at my other and see why it lost pressure, i might look you up or you look me up and look what im running,,i did try a 4 hole last year 1 inch spacer and slowed,im running a open now and does ok,i still want to try to run it sideways and see what it does but need to cut more out of my hood scoop to do that
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Post by sg3526 on Jul 24, 2012 11:04:54 GMT -6
sg3526,ill be at gateway aug 4th,had to put my back up tranny till i can find someone to look at my other and see why it lost pressure, i might look you up or you look me up and look what im running,,i did try a 4 hole last year 1 inch spacer and slowed,im running a open now and does ok,i still want to try to run it sideways and see what it does but need to cut more out of my hood scoop to do that Just let me know what to look for. We may go to Benton this weekend too. |
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Post by 69b1dart on Jul 24, 2012 11:15:29 GMT -6
i have the outlaw dart,so ill be there aug 4th at gateway,lord willing,going to try to go to benton sat,with my son in the truck
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Post by sg3526 on Jul 24, 2012 12:02:19 GMT -6
i have the outlaw dart,so ill be there aug 4th at gateway,lord willing,going to try to go to benton sat,with my son in the truck Sublime Green car? I will either be in my 34 Chevy Roadster or my Dragster. I park up in front of the concession stand, have the White Chevy Dually and 44' Pace trailer. Right next to Janie Palm and Willis Racing. |
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Post by 69b1dart on Oct 22, 2012 5:51:14 GMT -6
carb man,i run the ngk 4554 plugs,i ran these with gas but now run alky,should i go with a hotter plug and what gap,what number would be a hotter plug
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