Posted By: RapidRobert
dual carbs: eddy 1406's or OE 60's 4131 AFB's - 01/15/12 06:49 PM
Have both sets avail to be refurbished. Which set would you guys recommend I go w? 451 big block DD w mild cam. more interested in mileage/driveability than HP potential. Thank you for your time.
Posted By: RUNCHARGER
Re: dual carbs: eddy 1406's or OE 60's 4131 AFB's - 01/15/12 07:13 PM
I would do the 1406's assuming equal throttle shaft tightness on both sets.
Sheldon
Posted By: RapidRobert
Re: dual carbs: eddy 1406's or OE 60's 4131 AFB's - 01/15/12 07:19 PM
The 4131's are VERY loose on the shafts but I am going to have them rebushed and I can get a mate to my 1 current 1406 for cheap if I act FAST
Posted By: ScottSmith_Harms
Re: dual carbs: eddy 1406's or OE 60's 4131 AFB's - 01/15/12 07:23 PM
Robert when fresh and jetted equally I doubt you'll notice any difference between them.
Posted By: RapidRobert
Re: dual carbs: eddy 1406's or OE 60's 4131 AFB's - 01/15/12 07:30 PM
Scott good to hear from you. I went to the site you sent & they want over $200 canadian for the rebushing kit & iirc it has 8 bushings. You and a local guy who does them said it is a rarity to have to do them but these are LOOSE but that's MY subjective assessment. I should grab a dial indicator & shoot you a dimention. he's going to do em for $25 a shaft so I might have him do all 4 shafts (anal I know but they SEEM too loose) and I want good mileage/driveability and dont want to have to go back inside again
Posted By: ScottSmith_Harms
Re: dual carbs: eddy 1406's or OE 60's 4131 AFB's - 01/15/12 07:52 PM
It's not so much the "looseness" you need to be concerned with, it's more about the shape of the holes. If egg shaped they are worn, if round they are probably fine. I rebush them all anyway so it's no matter to me. BTW, the EB is basically the same carb, however they did make a few design changes to the casting, one of the changes made makes the typical method of rebushing them impossible due to the length of the shaft/tube casting.
Posted By: RapidRobert
Re: dual carbs: eddy 1406's or OE 60's 4131 AFB's - 01/15/12 07:56 PM
The eddy's being newer I'd assume they are OK but the 4131's are loose but yes I should have listened to the 2 experts (you being one of them) who said leave them alone
Posted By: RUNCHARGER
Re: dual carbs: eddy 1406's or OE 60's 4131 AFB's - 01/15/12 09:18 PM
Does the 4131 have the vacuum controlled secondary air door? I know I bought a bunch of old AFB's to make hemi clones and one of them did not have an air door, can't remember if it was the 4131 or not. If no air door I wouldn't monkey with it.
Sheldon
Posted By: ScottSmith_Harms
Re: dual carbs: eddy 1406's or OE 60's 4131 AFB's - 01/15/12 10:32 PM
Hemi AFB dual 4 setups did not have (or need) a secondary air door adjustment (AVS).
Posted By: RapidRobert
Re: dual carbs: eddy 1406's or OE 60's 4131 AFB's - 01/15/12 10:47 PM
here's one of em. The rebusher has the other one
Posted By: RUNCHARGER
Re: dual carbs: eddy 1406's or OE 60's 4131 AFB's - 01/15/12 11:25 PM
Scott: The carb I am talking about had secondary throttle blades and that's it. I'm well versed on Hemi carbs and differences from AFB's to AVS'.
Sheldon