softail73
Lady and the Scamp
Uea thats helpful ...thanks
360 magnum heads on Alcohol anyone try this ????
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softail73
Lady and the Scamp
Yes it was converted over to alky. Raised the floats already .. is there something else I should be looking at besides floats?
softail73
Lady and the Scamp
I have tried heat range of 7 to 12. Carb builder told me to use 9
Yea went from 36 to 33 it didnt help
softail73
Lady and the Scamp
softail73
Lady and the Scamp
Tries a friends quick fuel alky carb and it did it too
Dartswinger70
Well-Known Member
That's a little humor..
softail73
Lady and the Scamp
Humor,...I recognize it, just not real familiar with it. Just frustrated with my car. Runs dead on the dial and has put me in the winners circle several times even with its problems. Just afraid its gonna hurt something
bOb shingler
Well-Known Member
1-try a new 6al, 2-move your shift rpm up, 2-if it has a rev limiter move it up a 1000rpm, 4-put move timing in it, alcohol needs it, 5-you don't read the plugs the same as a gas motor, 6-go find mike canter's essay on reading alcohol fueled plugs.
softail73
Lady and the Scamp
Tried new 6al box. No rev limiter. Carb builder said use ngk 9 had timing at 36 dropped it to 33. Havent tried moving shift point thou. Thanks
Are you getting enough fuel to it? I ran E85 briefly NA on a converted 750 carb and upgraded everything to deliver the additional 30% more fuel E85 required. I assume alcohol is even more. 1/2" feed and return, 255lph fuel pump, FI rated regulator.
Can you put a wideband O2 on it? That would take the guess work out of where your tune is in terms of too rich vs too lean when it pops.
Can you put a wideband O2 on it? That would take the guess work out of where your tune is in terms of too rich vs too lean when it pops.
I see where you tried a bigger pump already and that your fuel pressure is stable at RPM. I got nothing else. Wideband.
softail73
Lady and the Scamp
I went from a holley black to a hp150 Holley and no change
softail73
Lady and the Scamp
And I have 1/2" line
softail73
Lady and the Scamp
Hate to sound like some dumb chic but I am.
I'll check into that thanks. If anything else comes to mine please dont hesitate
Are your heads cracked at the valve seats? Magnum heads have a reputation for cracking in between the intake and exhaust valve seats.
softail73
Lady and the Scamp
had the heads checked when I had them and intake ported. Springs look good to
bOb shingler
Well-Known Member
look back at post 33 #4 and #6
Retroboy
Well-Known Member
Mate I have a 360 with J heads injected Meth, lunati camshaft and a Vertex. Simple as anything 10.5:1 motor. Runs like ten men. Seriously ditch that carby and after you've tried a single butterfly injection set up you won't ever consider a carb again. The only other thing is I run way hotter NGK BP5ES plugs.
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Retroboy
Well-Known Member
Converting a carb to Alcohol is more than just upping jet sizes. Assuming this carb has big needle and seats? Air bleeds enlarged passages through the metering block enlarged and so on. Also is it something super simple like it hasn't got jet extensions?
Cheers
Cheers
softail73
Lady and the Scamp
Its got extentions
Burn on electrode of plug should be in center. Hard to tune alcohol by plug. Water temp should rise by 10 degrees at end of run. u can try closing gap on plug to .025. My fuel pressure is 4 psi at idle and 12psi wide open as per carb builder. We tune off of exhaust gas temp.
softail73
Lady and the Scamp
Thanks for the tip will give it a try this weekend
How much ET did you pick up going from gas to alcohol.
Retroboy
Well-Known Member
Howdy. I've been waiting for more replies to this post but it seems to have stopped. Here's one of my plugs. The reason I've shown this is to show you the heat mark on the bend of the earth strap. I have "J" heads not Magnums and I know you said your carb guy said to run the NGK 9 plugs but they are very cold. Your plugs need to show a mark like this around about this area.
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