Author Topic: Carburetor Selection  (Read 1912 times)

torres78

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Carburetor Selection
« on: May 08, 2010, 06:51:53 PM »
Hey guys I need some help, I have a 68 302 with a C4 and an autolite 2100 and running 235/14 tires. I have a set of 289 heads that I am going to do a gasket match porting on and I am adding a crane cam (130032) smooth idle with an advertise duration of 260. My question is do I keep the 2100 2v carb and do a port match on the intake manifold or do I use the autolite 4100 4v 1.12 ventri 600cfm and do the port gasket match on the intake as well.
The only thing about the 4100 is that the carb was change to manual choke which I am not use to. Any one has any info on this. I am not very sure about the manual I will have to add the choke cable to the car

Soaring

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Re: Carburetor Selection
« Reply #1 on: May 09, 2010, 04:05:05 PM »
It all depends on how you are going to use the car.  The manual choke is effective, but a pain in the ass.  If your Mustang is just going to be a cruiser, the 2100 with the automatic choke will be quite adequate. 

66GTKFB

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Re: Carburetor Selection
« Reply #2 on: May 09, 2010, 05:24:49 PM »
Manual choke - let's see. You pull it all the way out when the engine is cold, crank the engine and give it some gas until it starts, push the choke back in a bit until the engine is stable, then drive some and shove the choke in all the way. The next lesson will involve sliced bread. (All these new fangled devices.)
Jim

torres78

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Re: Carburetor Selection
« Reply #3 on: May 10, 2010, 07:53:39 AM »
Thank you Soaring for your response as for you Jim thanks but I am not interested in cooking I leave that for the ladies

66GTKFB

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Re: Carburetor Selection
« Reply #4 on: May 10, 2010, 10:27:38 AM »
Sorry about that - you must use the drive up window a lot. Glen says a choke is a pain, but a jammed automatic choke is a common problem, not recoganized as a problem and usually rates low on the priority list. Back to your original question: with all the expertise you exude on "porting", why would you not immediately consider a 4 barrel carburetor and manifold as a matter of a pragmatic upgrade? At least at that time, your modified 4100 can be easily swapped for a non-modified one, or replaced by another type. Remember - "Speed costs money, how fast can you afford to go".
Jim

Soaring

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Re: Carburetor Selection
« Reply #5 on: May 10, 2010, 11:59:44 AM »
Sorry about that - you must use the drive up window a lot. Glen says a choke is a pain, but a jammed automatic choke is a common problem, not recoganized as a problem and usually rates low on the priority list. Back to your original question: with all the expertise you exude on "porting", why would you not immediately consider a 4 barrel carburetor and manifold as a matter of a pragmatic upgrade? At least at that time, your modified 4100 can be easily swapped for a non-modified one, or replaced by another type. Remember - "Speed costs money, how fast can you afford to go".
Jim
No, what I said is that a Manual choke is a pain.  If you forget to push it back all the way you will be wasting gas and your engine will run like shit.  I grew up with manual chokes, and have done this very thing many times on the tractors as well as the trucks and cars.  I've had several dozen cars and trucks with automatic chokes, and I have never had one to fail. You can add an automatic choke to any 4100, and it sounds as if that is what you want to do.  Get a Weiand intake and an overhauled 4100, then add the heat from the exhaust manifold and Wallllaaaaa!  A four barrel Mustang.  If you can find one (Pony Carbs?) that is overhauled don't be shocked at the price. 

torres78

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Re: Carburetor Selection
« Reply #6 on: May 11, 2010, 10:04:25 AM »
Thanks Glen, I am going to use the 4100 and see how it does.
(btwy can I port the 4100 would that make me run faster) hahaha

 

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