I already see one difference the 4779-0 came with 75 main jets on the primaries and the 4779-9 came with 71's. Also the -0 came with an 8.5 power valve where the -9 came with a 6.5. Just fallow my link above there are all sorts of differences between those carbs.
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adjusting 4 corner idle on #4779-9 holley 750dp
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well curiosity got the better of me so i opened the carb up ,removed both float bowls and removed the metering plates . What i found i couldn't believe it , found both PV's blown and very loose not tightened onto the metering block and this was a brand new carb from Holley . I never noticed any backfire or spit back while i was trying to tune it and this carb also had the PV blowout protection set up so not sure how the PV's blew out
The carb is now off my motor and air drying the fuel smell out so i can return it to Summit tomorrow and awaiting the new carb they're sending me ,hopefully i can have better luck with it"if it's too loud you're too old !!! "sigpic
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Originally posted by Casper View PostThis is what was sitting on top of the reman 650 I just ordered from Holley E-bay
Carb smells like turpentine. I haven't bothered trying to install it yet but I have a feeling it'll be going back too.
that's not good !!!
"if it's too loud you're too old !!! "sigpic
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Originally posted by oldschoolcamaro View Post
that's not good !!!Last edited by Casper; March 31, 2014, 11:11 AM.
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Originally posted by Bamfster View PostMaybe I missed it .... why the new 750 if the old 750 was working perfectly?
here's the old 4779-0 with the #6109 linkage set up ..
"if it's too loud you're too old !!! "sigpic
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Looking at the picture, I think your problem with the primary accelerator pump is the missing arm. Where is it? You could've gotten a new diaphram for it. Hell, for $60, you can get a whole accelerator adjustment kit.
I have the same old ass 4779 on my engine. Paid a whole $20 for it. Still works great.
Last edited by Scott Liggett; April 1, 2014, 04:51 PM.BS'er formally known as Rebeldryver
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Originally posted by Scott Liggett View PostLooking at the picture, I think your problem with the primary accelerator pump is the missing arm. Where is it? You could've gotten a new diaphram for it. Hell, for $60, you can get a whole accelerator adjustment kit.
I have the same old ass 4779 on my engine. Paid a whole $20 for it. Still works great.
that's the only pic i had of that side of the carb showing the weird #6109 linkage set up and in this pic i didn't have the right float bowls either as when i got the carb it was main body only .in that pic that is the secondary float bowl on the primary side ,was just trying to show a somewhat complete carb for the linkage . In the pic there wasn't even any gaskets on the carb at all jut a static display purpose only
"if it's too loud you're too old !!! "sigpic
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