good carb for 170

[Anonymous]

I need a rebuild on my stock carb and now i'm thing about buying a new carb. I would like to put a 2v on it but it is in a 66 bronco and don't think it will fit with the adapter under the hood. I need as much power out of this 170 as i can get to turn 33" tires. is there a better or bigger carb that would be a bolt on 1v? I read a 1969 mustang 250 1v carb would be a good upgrade is this true?
also how much would a 2v help me?( I read 20 to 30 hp) if its huge I would think about a hood scoop but would rather leave the hood stock
with a bigger 1v

 

[CZLN6]

Howdy BH101:

What year engine and vehicle are you working with? What year and type distributor? Are you planning any other uprades?

Adios, David

 

[Anonymous]

The motor is a 66. I would like to put dual outlet headers if they will fit in a early bronco and a bigger cam at some time. For this fall I will be looking to a carb for now then do the rest over the winter.
the only thing it has now is K&N off a 500 polaris sportsman (easy fit for a bronco air cleaner setup) I have an hei distributor on its way.

 

[CZLN6]

Howdy Back:

YOu need to spend some time reading the stickies at the top of this forum. Both the "Load-a-Matic Distributor" one and the "How a SCV works". Your '66 170, has both.

You can upgrade to a 66 200 carb, which will be an Auotlite 1100 also and look very much like the one on your 170. It will flow 185 CFM compared to the 170s 1100, which is rated at 156 cfm. Both will have a Spark Control Valve (SCV) and be compatible with your stock, Load-a-Matic distributor. Your stock linkage, fuel and vacuum lines, and air cleaner will also work.

Your stock '66 distributor could benefit from a Petronix Ignitor I conversion and coil.

When and if you do move up to a two barrel carb, plan on converting to a '75 and later DuraSpark II electronic ignition. It will have both vacuum and centrifugal advance and be compatible with the ported vacuum of a two barrel carb.

Make sure that you are getting full throttle when the accelerator pedal is floored. You didn't give your location/elevation, but you will enjoy better throttle response, mileage and power by increasing your initial timing another 5 degrees over stock settings.

When you get ready to move up to more power, consider moving up to a 200 engine. Also know that the cam, header, and carb you're talking about will move your power range up higher in the rpm range- not what most rock crawlers want.

Enjoy the journey.

Adios, David