help me please
09-05-10, 04:29 PM
#1
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help me please
ok all u carb heads i have a 45dcoe on my stock 12a with a rb header no cat k an here r my setings as of now 180 main 65f9 idle 36mm vent an pump jets r 65 an f11 e tubes an 170 a\c an a 200needle an seat an timen is set to stock do i need to advance an how help me out guys thanks
09-06-10, 08:12 PM
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ok well it idles real crapey an when u r at an idle an stomp it it just bougs out an dies an when driven at steady speed it mells like it is missing? an if i turn the disteber to the left if standn on driver side the idle will go smooth as hell but has no power ok an bougs real bad an blows flams can b seen on you tube type n bad *** rx7 blown flams it is the one that has blacked out lail lights an if i turn it to the right it idles real bad but lots of power an doint bouge balery now give me that info i hungy!
09-06-10, 09:14 PM
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ok well it idles real crapey an when u r at an idle an stomp it it just bougs out an dies an when driven at steady speed it mells like it is missing? an if i turn the disteber to the left if standn on driver side the idle will go smooth as hell but has no power ok an bougs real bad an blows flams can b seen on you tube type n bad *** rx7 blown flams it is the one that has blacked out lail lights an if i turn it to the right it idles real bad but lots of power an doint bouge balery now give me that info i hungy!
Set your timing back to stock. You are using a timing light, aren't you? If it's still running badly, your problem lies elsewhere. Can you get it idling smoothly using the idle mixture and throttle stop screws?
You might need to go richer or leaner on the accelerator pump jets to fix the bog when stomping it from idle. It's also possible that one or both of them are clogged, so check that.
As for cruising at constant throttle, your idle jets are what you should be looking at. You may need to go a step or two leaner.
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09-07-10, 08:28 AM
#8
Waffles - hmmm good
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I see a peice of crap mr gasket type fuel regulator. Toss it, they aren't very good
and will adversely affect fuel flow a lot. You don't need a lot of pressure for a weber,
something like 4 or 4.5 psi but you will need the flow. I hope your using an
aftermarket fuel pump or again your wasting your time.
The mr gasket regulator can affect your tune even at idle so thats why I say to toss
it. It will cause irregular flow and pressure drops which will make it impossible to
tune your carb. Even the cheapie Holley regulators have issues, I know mine does.
In fact I need to take it apart and clean up any burrs so it works better.
Do you time it at idle or 4K? Do you disconnect vacuum advance when you do it?
I normally set my timing at 4K rpm to ~25 degrees (leading I don't have trailing).
It will have a lumpy idle but should run fine once off idle. You can always increase
idl a bit to compensate for it as well. Like say 900 or 950 instead of 750 rpm.
and will adversely affect fuel flow a lot. You don't need a lot of pressure for a weber,
something like 4 or 4.5 psi but you will need the flow. I hope your using an
aftermarket fuel pump or again your wasting your time.
The mr gasket regulator can affect your tune even at idle so thats why I say to toss
it. It will cause irregular flow and pressure drops which will make it impossible to
tune your carb. Even the cheapie Holley regulators have issues, I know mine does.
In fact I need to take it apart and clean up any burrs so it works better.
Do you time it at idle or 4K? Do you disconnect vacuum advance when you do it?
I normally set my timing at 4K rpm to ~25 degrees (leading I don't have trailing).
It will have a lumpy idle but should run fine once off idle. You can always increase
idl a bit to compensate for it as well. Like say 900 or 950 instead of 750 rpm.
09-07-10, 10:45 AM
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yes i am usen a after market fule pump an it is still a bit small it only pushes 30gph but have a new 255lph one order an new regulator a good one just not n yet an no timen light timeing should b fine motor was rebuilt 21tho on it now i had it built by the rotary doc an he seat the timeing the reason i asked is cause i read this tred that instaler67 sent me an it said it was all bout the timeing an i rebuilt the carb there is no clogs in it i am for sure of it an can any one tell me what the spec for the floot that are not n mm
09-07-10, 10:52 AM
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an no an the idli never will go smooth no mater how i adjust it nless i turn the disrberter to the right if standn on driver side but like i said it blows flams an will bog real bad an no power no what u think
09-07-10, 11:02 AM
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I think you've got a clogged jet or a leading ignition issue. Check for spark from both leading plugs. You said you rebuilt the carb... how long ago? Did this problem start right after that? Jets can become clogged with no warning, so just because it's been rebuilt recently doesn't mean you shouldn't check them.
09-07-10, 11:14 AM
#13
Wow unless you figure out how to type properly I will only offer this one post...
You need a low pressure high flow fuel pump (like the wallboro 255) and need to make sure your pressure is set between 2 and 2.5 psi.
I also think your pump jets and idle jets are too big.
You need a low pressure high flow fuel pump (like the wallboro 255) and need to make sure your pressure is set between 2 and 2.5 psi.
I also think your pump jets and idle jets are too big.
09-07-10, 11:25 AM
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rebiult not long ago like 2 months an jets r clean i looked an these carb r post to have 3psi an i got carb used an was told it worked great boy was that a lie an everybody has told me to run the 65f9s an anybody konw bout the flot seting an not n mm please
09-07-10, 11:43 AM
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If none of the jets are clogged and you're getting spark, my next guess is that your idle jets are just too big. Try going down to a 55F9 and see if it helps. Don't mess with the accelerator pump jets until you've got your idle jets squared away.
As for the float setting, it depends on which floats you have. Are they the hollow brass ones, or the solid plastic ones? The brass ones should be set at 8 mm. I'd have to look up the spec for the plastic ones, but I believe it's something like 12.5 mm.
As for the float setting, it depends on which floats you have. Are they the hollow brass ones, or the solid plastic ones? The brass ones should be set at 8 mm. I'd have to look up the spec for the plastic ones, but I believe it's something like 12.5 mm.