1970 RR new carburator

[roddy70]

Hi all,
can anyone suggest the best choice to replace the old carburator on my '70 roadrunner 383 manual trans?

thanks and regards

Roddy70

 

[twinscrew698]

If you want to keep it original,send it to Harms auto for a rebuild!
http://harmsauto.com/

 

[roddy70]

Thanks for your answer,but my corb is a holley already remanufactered,so i thinking about replace it with a hedelbrock.....

 

[Photon440]

You'll definitely want to think about going with Webers...

http://www.stationwagonforums.com/forums/showthread.php?t=19237

 

[HawkRod]

Thanks for your answer,but my corb is a holley already remanufactered,so i thinking about replace it with a hedelbrock.....

OK, so you are not saying WHY you want to replace the carb. Is the current one not working well? If so, a decent rebuild is probably a better idea, as you won't need to mess with new linkage and chokes. The Holley's are susceptible to warping, so if a regular rebuild does not work, then getting them squared up will almost always fix them up. It is really not too hard.

If you want a bigger carb, have you rebuilt or changed the engine to take advantage of more CFMs?

 

[roddy70]

OK, so you are not saying WHY you want to replace the carb. Is the current one not working well? If so, a decent rebuild is probably a better idea, as you won't need to mess with new linkage and chokes. The Holley's are susceptible to warping, so if a regular rebuild does not work, then getting them squared up will almost always fix them up. It is really not too hard.

If you want a bigger carb, have you rebuilt or changed the engine to take advantage of more CFMs?

My engine is stock;100k miles,never opened;carb does not work well so i need new one;can you tell me how many cfms should I choose?

 

[HawkRod]

My engine is stock;100k miles,never opened;carb does not work well so i need new one;can you tell me how many cfms should I choose?

First, regarding CFM: A 600 CFM carb will be the replacement for the original, at least if you have a Holley. I am not 100% sure on the AFB, but it should be similar.

Do you have an AFB or Holley carb? Chrysler used both. If you want original performance and want to keep it that way, I again suggest rebuilding the carb you have. It will be cheaper than buying a new carb, and all your linkage will continue to work like it should. If you had the carb rebuilt and it still isn't working well, the fault isn't the carb but the rebuilder. Send it to a competent rebuilder and they should be able to get it back fully functioning.

Good luck with whatever you decide...

 

[roddy70]

Hi all,
my carb is definetely broken and seems that is not rebuildable;
so i should buy the new one;
is this carb AUTOLINE Part # C7085 {#H44160} Reman Holley 4 Barrel 4BBL; H4-4160 a valid option for my car(383 stock, 4m manual)?
thanks a lot for your help

 

[Moparparts]

PM sent

 

[bigmanjbmopar]

Qft

 

[PurpleBeeper]

Hi all,
my carb is definetely broken and seems that is not rebuildable;
so i should buy the new one;
is this carb AUTOLINE Part # C7085 {#H44160} Reman Holley 4 Barrel 4BBL; H4-4160 a valid option for my car(383 stock, 4m manual)?
thanks a lot for your help

Short answer.... yes, that carb is a good choice for a stock'ish 383

 

[HawkRod]

OK, so if you need a new carb, you also need to determine if you have a CA car or not. The CA cars had the CAS (Clean Air System), so the carb had a vent line that went to the valve cover air breather. If you do not have a CA car, you will not have that vent line.

This is a picture of a correct California spec Holley carb. Note the line from the front bowl to the air breather...

 

[roddy70]

Hi Sorman,thanks for your reply;
I suppose that it is not a CA car;from vin it has been assembled in Lynch Road, MI.
I'm not @ home so i can't do a photo of my engine bay;
but in case that my car is noa Ca what carb do you suggest to buy?

thanks a lot

 

[HawkRod]

Yeah, Lynch Road would not have had the CAS system, to the best of my knowledge.

Since you have a Holley, the carb you specified in your post above should work. If you want the actual correct carb, let me know and I can look that up. But you will need to find one which is not always easy...

 

[roddy70]

Another question: single inlet or dual inlet?
sorry for my question but i'm not a mechanic.

Thanks a lot

 

[HawkRod]

Single inlet.