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Thread: P76 v8, best carb?

  1. #1
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    P76 v8, best carb?

    The P76 v8 in my stage 1 has I presume a twin barrel Stromberg that has been pretty heavily butchered to fit a gas conversion (since removed and the injection tubes capped) and also had the majority of bits taken off such that it now has no high idle on the choke. This is getting a pain in the bum in cold weather.

    What would be the best option (short or long term) for carb options for this engine? Rebuild and find the missing parts for this one, buy a new one, or possibly another carb that would give better performance? Some better fuel economy would be nice.....

    20180901_154445 m.jpg

    20180901_154455 m.jpg

    Thanks,

  2. #2
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    The high idle part should be able to be fabbed up by a back yarder .

    It is just a rod with a few bends in it and some clips and or small split pins.

    It is just a rod that goes from the choke butter fly rod as in your first pic to the below inside of throttle shaft .
    The strommie is a good basic carb in good condition , Dont go the holley carb as off road they will flood unless you spend more coin

  3. #3
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    Looky Here
    You need a fast idle link
    https://www.carbkitsource.com/tech/S...anual-1956.pdf
    I know it is for a old car but those carbs were around for years it will give you a idea if not Google away plenty of info out there.

  4. #4
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    I agree with rangieman, the original Stromberg is the best carby for the P76 engine. I'll have a look through my junk boxes and see if there are enough parts to fix your problem and maybe send you a pm. In any case, the gas nozzles need to be removed and the base plate and jets inspected to make sure they're P76 parts. Similar carbies used on Holden and Ford V8's had totally different jetting making them impossible to tune. I'll post up some pics later to show you where to look.

  5. #5
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    Thanks heaps lads. I'm happy to keep the Stromberg carb as agreed it seems the best out there. My question just threw all other options out there. I'd most like to get the proper linkages and as beeutey said, check the jetting, to make it run as well as possible.

    Apart from it getting a bit hot when worked hard on the beach and the cold start issues, I'm very happy with the engine otherwise.

  6. #6
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    Quote Originally Posted by bee utey View Post
    I agree with rangieman, the original Stromberg is the best carby for the P76 engine. I'll have a look through my junk boxes and see if there are enough parts to fix your problem and maybe send you a pm. In any case, the gas nozzles need to be removed and the base plate and jets inspected to make sure they're P76 parts. Similar carbies used on Holden and Ford V8's had totally different jetting making them impossible to tune. I'll post up some pics later to show you where to look.
    How would you plug the holes in the barrels when the gas nozzles are removed? The holes have been just drilled through the side of the carb into the barrels and the nozzles puttied in!
    Cheers, Chris.

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    Quote Originally Posted by cjc_td5 View Post
    How would you plug the holes in the barrels when the gas nozzles are removed? The holes have been just drilled through the side of the carb into the barrels and the nozzles puttied in!
    Cheers, Chris.
    Any two part epoxy suitable for patching petrol tanks should do that job.

  8. #8
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    OK it looks like you need the drop link to the fast idle cam and the throttle actuator arm with a working fast idle screw.



    ww2 bits.jpg

  9. #9
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    Quote Originally Posted by cjc_td5 View Post
    The round housing on the side of the carb is stripped empty on my carb. I presume it is part of an auto choke mechanism? If so, I'm not too worried about this as I am happy to use a manual choke cable...

  10. #10
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    Quote Originally Posted by cjc_td5 View Post
    The round housing on the side of the carb is stripped empty on my carb. I presume it is part of an auto choke mechanism? If so, I'm not too worried about this as I am happy to use a manual choke cable...
    While a simple manual choke works well enough the original auto choke provided spring loading so the choke butterfly would open a bit at full throttle. Aftermarket manual choke conversion kits replicated the auto choke's coiled spring action. Simple manual choke jobbies like yours can be a right nuisance to use if you're in a hurry to move off with a cold engine.

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