Finding the correct carb.
Thread Starter
Burning Brakes
Joined: Oct 2001
Posts: 1,241
Likes: 4
From: Okinawa Okinawa
Finding the correct carb.
I currently have a 750 double pumper on my 350. Whenever I hit the gas at a standstill it bogs down or sometimes stalls. I am looking at getting a holley 600 or 650. What are the pros and cons to both?
Safety Car
Joined: Feb 1999
Posts: 3,631
Likes: 14
From: Fountain Hills AZ
Re: Finding the correct carb. (scottw)
If your engine is otherwise stock or only mildly modded, a smaller carb would be a better choice. I suspect that your problem has more to do with the mechanical secondaries than it's size though. Having total control over secondary openning is one of the advantages of a double-pumper but it can also be a disadvantage if you try to drive like you would with a vacuum secondary carb. Sometimes you will get a bog even with a perfectly matched carb (vacuum or mechanical) if it isn't set up right Seems to me that the 625 cfm Road Demon would be a good match for you but most anything with vacuum secondaries should help compensate for your heavy foot.
Melting Slicks
Joined: Oct 2001
Posts: 2,062
Likes: 1,361
From: Halifax, Nova Scotia, Canada
Re: Finding the correct carb. (scottw)
Hi Scott..
I have a 750 Holley DP. It takes quite a bit if tuning to get it matched to
a particular configuration.
If you can post the details of your configuration, engine(stock/non stock items), tranny, rear gears, then I'm sure there are lots of 750 owners
that can offer assistance.
I also have a 600 Holley vacuum, if you were interested in a trade.
Barry
I have a 750 Holley DP. It takes quite a bit if tuning to get it matched to
a particular configuration.
If you can post the details of your configuration, engine(stock/non stock items), tranny, rear gears, then I'm sure there are lots of 750 owners
that can offer assistance.
I also have a 600 Holley vacuum, if you were interested in a trade.
Barry
Thread Starter
Burning Brakes
Joined: Oct 2001
Posts: 1,241
Likes: 4
From: Okinawa Okinawa
Re: Finding the correct carb. (Barry's70LT1)
The engine has a 350 cam in it. The tranny is a TMH400 auto and the rear gear is a 3.36.
I don't have a heavy foot (most of the time), I can press the gas pretty lightly and it bogs down a little. If I do hit the gas it really bogs down for almost a full second.
I don't have a heavy foot (most of the time), I can press the gas pretty lightly and it bogs down a little. If I do hit the gas it really bogs down for almost a full second.
Racer
Joined: Jun 2000
Posts: 439
Likes: 0
From: North Carolina
Re: Finding the correct carb. (clem zahrobsky)
Clem...I'm running a Holley 750 on my ZZ4 and have the same problem. Would a 650 be my better choice or have the 750 rejet to a 650. Thanks for the help
Burning Brakes
Joined: Jul 2001
Posts: 905
Likes: 1
From: New Bern NC
Re: Finding the correct carb. (scottw)
Want to trade?? Brand new Holley 600, electric choke and shiney finish? I was planning on something bigger than a 750 but if you want to trade it is definitly a step in the right direction.
Le Mans Master
Joined: Aug 2000
Posts: 9,662
Likes: 7
From: Semper ubi, sub ubi
Cruise-In VI Veteran
Cruise-In VII Veteran
Re: Finding the correct carb. (tworottiedogs)
Mike,
That 600 is way too small for your BB. If you two guys can make a trade I think you'd both be better off.
That 600 is way too small for your BB. If you two guys can make a trade I think you'd both be better off.
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Le Mans Master
Joined: Mar 1999
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From: delmont pa
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Re: Finding the correct carb. (SILVRTOY)
a 750 vacuum secondary should work fine on your engine. post the list number from the front of the choke housing of your carb and i will see what you have.