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post #1 of 4 (permalink) Old 06-05-05, 05:34 AM Thread Starter
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confused Prob's with the right bank fueling up

Hi guy's, another question got a major problem with me 378 ive got twin 780cfm v/c on top of a cain tunnel ram sideways with gen 2 3v's with big valves. All port matched, im running a crane custom soild grind cam 698int 703ext at 4degs adv. We took it out for a run down the coast today and at 3500 rpm on the hiway it was very slugesh and wouldnt take off, like it was last week. Anyway came home and pulled out the plugs and the right bank was all black and sooted up and the left was grey and looked normal could it be that the carbs are sideways or the fact that there vac/secs and the size of the cam is too large.
Please help this thing is awesome to drive.
Mick



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post #2 of 4 (permalink) Old 06-05-05, 05:42 AM
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Re: Prob's with the right bank fueling up

Is the front of the carb on the right hand side (ie the primary side of the carb)
If so, that may explain why that side is running richer, as the air flow is more direct from those two barrels to the cylinder ports.

Also mounting the carbs sideways can also cause problems when launching, as all the fuel will move to the back of the bowl, due to the g-force, therefore one of 2 things can happen

- The float can drop, and cause the carb to flood
- The forward most jet/s can be starved of fuel, causing a lean condition on one side of the carb.


Is there anyway you could make a custom adapter to mount the carb 90 degrees from where it is - even if its temporary, just to help isolate the issue?

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post #3 of 4 (permalink) Old 06-05-05, 05:43 AM
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Re: Prob's with the right bank fueling up

Quote:
Originally Posted by fat071
Hi guy's, another question got a major problem with me 378 ive got twin 780cfm v/c on top of a cain tunnel ram sideways with gen 2 3v's with big valves. All port matched, im running a crane custom soild grind cam 698int 703ext at 4degs adv. We took it out for a run down the coast today and at 3500 rpm on the hiway it was very slugesh and wouldnt take off, like it was last week. Anyway came home and pulled out the plugs and the right bank was all black and sooted up and the left was grey and looked normal could it be that the carbs are sideways or the fact that there vac/secs and the size of the cam is too large.
Please help this thing is awesome to drive.
Mick
Way too much fuel can kill a motor. Keep on eye and nose on your oil, as it doesnt like too much fuel mixed with it.
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post #4 of 4 (permalink) Old 06-05-05, 05:53 AM Thread Starter
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Re: Prob's with the right bank fueling up

[QUOTE=


Is there anyway you could make a custom adapter to mount the carb 90 degrees from where it is - even if its temporary, just to help isolate the issue?[/QUOTE]
yeh it could be done but then rises another problem the carbs arent inline with the ports but ill keep it in mind though


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