SoCal Jet Boats
Tech Talk => Engine Mechanical / Electrical => Topic started by: 2savage4you on April 17, 2008, 11:09:26 AM
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i got this carb from River Dad with the engine i bought from him ;) Now i wanna know if this is practical for my application... Dont know what the CFM is it has so many #'s on it
8620
8551
6501
6513
L47802
The 4780 comes up as a 800 CFM carb, im just taking a wild guess here that thats the number?
Im running BBC yeah CHEBY ;D mild cam and 020 over pistons. I did a search on the Holley site and they recommend a 750 CFM ??? So is the 800 to much?
2sav
(https://www.socaljetboats.com/proxy.php?request=http%3A%2F%2Fi223.photobucket.com%2Falbums%2Fdd269%2F2savage4you%2F002-20.jpg&hash=e20a266b1f6295c4e6ed1dfcb16e0885500d0ad3)
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Just run it once and see how it works. Then adjust from there >:D
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Just run it once and see how it works. Then adjust from there >:D
It needs to be rebuilt , and i dont want to spend money twice Or i wont make it to Parker ;)
I think i will just sell it and buy a new 750 something like what brad has.. That is a nice carb ;D
2sav
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I think i will just sell it and buy a new 750 something like what brad has.. That is a nice carb ;D
2sav
how deep are your pockets? im still on the "hot pockets for breakfast/lunch/dinner" budget....but it was worth every penny.
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I'll get slammed by all the Holley Purists out there but I'll tell you, the Edlebrock 1407, 750cfm carb I just bought and installed was easy to adjust and works great.
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how deep are your pockets? im still on the "hot pockets for breakfast/lunch/dinner" budget....but it was worth every penny.
Damn ive been on the top ramen budget since the Bahner arrived........... Hot Pockets are gourmet food ;D
2sav
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Damn ive been on the top ramen budget since the Bahner arrived........... Hot Pockets are gourmet food ;D
2sav
haha....ramen....back in my younger days thats all i ate...made for more beer/party money. the smell of it makes me sick.
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haha....ramen....back in my younger days thats all i ate...made for more beer/party money. the smell of it makes me sick.
Yeah me too , but its either steak on the table or boat in the water ??? and with five kids :banghead:
2sav
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2sav,
I would recommend overhaul the carb you have, run it and see how it works out. My engine is stock with mild cam, running 2 600 vacuum secondary carbs (little overkill but that's what it had on it).
If you can get it to me I'll overhaul it for you (the only part I haven't done is new bushings).
Call me (909)376-8843
crewchief22
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2sav,
I would recommend overhaul the carb you have, run it and see how it works out. My engine is stock with mild cam, running 2 600 vacuum secondary carbs (little overkill but that's what it had on it).
If you can get it to me I'll overhaul it for you (the only part I haven't done is new bushings).
Call me (909)376-8843
crewchief22
Man that would be great , but at the moment every penny i have is going toward the upholstery when its done. So it might be a week or two before i can pick up a rebuild kit and get it to you. Thank you for the help , i have done the 2 barrel holley's and they are a piece of cake. But the four barrel's i will probably screw up and i dont want that ;D
Thanks.
2sav
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Run it! The 800 will be fine!
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That 800 is a mech. secondary carb and IMO just right for your BBC. Did the Holley site ask you if it was for a marine application? Jet boat ap.? Is the 800 still sold/available? (if it isn't then that would be a real good reason why they wouldn't recomend it) I have never been to the Holley site looking for a recomendation but with all the variables in ap's I can't see it being 100% perfect. Your engine won't know the difference between a 750 vs. a 800.
RUN IT!!!
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That 800 is a mech. secondary carb and IMO just right for your BBC. Did the Holley site ask you if it was for a marine application? Jet boat ap.? Is the 800 still sold/available? (if it isn't then that would be a real good reason why they wouldn't recomend it) I have never been to the Holley site looking for a recomendation but with all the variables in ap's I can't see it being 100% perfect. Your engine won't know the difference between a 750 vs. a 800.
RUN IT!!!
Yes its mech secondary's , just what i want.. I went back to Holley and played around and now it say's i can run a 950 CFM carb so yeah it will work.......Dont know about production on this carb and i put it in as a race set up with a mild build. They have marine but i dont have a closed engine cover so i can use car/truck carbs ;D
2sav
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... Call me (909)376-8843
crewchief22
So 2Sav, did you? ::)
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I think that most people "in the know" say to run a slightly bigger carb on a boat than you would in a car. 750 or 800 isn't gonna have any noticeable difference out on the water. Run it when you can for a baseline then jet it carefully and you're all set. No worries.
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....and with five kids :banghead:
2sav
DAMN!!! ZIP YOUR PANTS MAN!!! :o ::) ;D >:D :screwy:
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That 800 is a mech. secondary carb and IMO just right for your BBC. Did the Holley site ask you if it was for a marine application? Jet boat ap.? Is the 800 still sold/available? (if it isn't then that would be a real good reason why they wouldn't recomend it) I have never been to the Holley site looking for a recomendation but with all the variables in ap's I can't see it being 100% perfect. Your engine won't know the difference between a 750 vs. a 800.
RUN IT!!!
I can tell you with 100 % certainty that is NOT designed for a marine application - it doesn't have J tubes.
It will still work though, most carbs run on boats aren't marine carbs...
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I can tell you with 100 % certainty that is NOT designed for a marine application - it doesn't have J tubes.
It will still work though, most carbs run on boats aren't marine carbs...
I didn't say his 800 was a marine carb... ???
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I didn't say his 800 was a marine carb... ???
Yes we know , we covered that way back. ;D
2sav
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2sav,
If you can get the carb to me (ship or SCJB delivery service) I can get it cleaned and ready to go. You can order parts from Summit or Jegs and have it shipped to me, or I can get them locally and bill you.
I would like to deliver it to you instead of shipping it. I'm planning on being back in Parker on Mothers Day weekend, maybe we can meet somewhere near Havasu.
Let me know what works for you.
crewchief22
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2sav check the shafts make shure there not loose get kit checkers in bull head has holley kits and ill show you how to re build its not hard and im just over the hill . dave 702 326 5717
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I have an Edelbrock Marine 750 I'll sell or trade. I bought it new and it has about 12 lake trips on it.
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I have an Edelbrock Marine 750 I'll sell or trade. I bought it new and it has about 12 lake trips on it.
Chaz, Don't you like the carb? Wish you had had this about 2 months ago.
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2sav,
If you can get the carb to me (ship or SCJB delivery service) I can get it cleaned and ready to go. You can order parts from Summit or Jegs and have it shipped to me, or I can get them locally and bill you.
I would like to deliver it to you instead of shipping it. I'm planning on being back in Parker on Mothers Day weekend, maybe we can meet somewhere near Havasu.
Let me know what works for you.
crewchief22
2sav this is your best bet, ive seen first hand crewcheif's attention to detail.