Howdy all,





Well I decided to not try to use the Holley that came from my OMC 460 and just buy a new Holley carburetor for my 292.



So I called Holley tech support and they recommended this one: http://www.holley.com/0-8007.asp



They also have a throttle position sensor kit that works with this one so it should be perfect for my 292/E4OD combination....



It's a 390 CFM 4 bbl. Anyone have thoughts/opinions on this? Specifically, should I be concerned that it's only rated at 390 CFM?





Thanks,





Rick








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1955 F-600/272/E4OD// Disclaimer: No animals were injured while test driving my F-600 except the ones I ran over intentionally!

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This post was created using OpenSuSE Linux x64 and Firefox

There are three Holley type carbs I would consider for your application:

(1) The Holley 390 CFM you've already mentioned

(2) The Holley "Truck Avenger" 470 CFM (Holley 0-90470)

(3) Barry Grant Road Demon Jr. 525 CFM

The Demon is a Holley derivative design - uses all of the Holley small parts. Don't overlook getting one of these carbs as a "factory rebuild" version - they are often quite a bit cheaper than the brand new ones. These are carbs that someone has returned - usually (according to the factory) because the new owner couldn't get them on and running properly. They usually strip the carbs, fit all new gaskets and small stuff and then run them through a 'wet" calibration test. For all practical purposes, they are new - just a $100 (or more) less. I bought my little 525 Demon for $180 and it looks and runs just like my neighbor's "New" one.

 
 Steve Metzger       Tucson, Arizona

Hi Steve,





I did look at the "Truck Avenger" too.



I did try a couple of CFM "calculators" and it appears that the 390 CFM would be more than adequate for a 292..... after all, it's for a truck, not a hot rod!!



The "Holley Guy" I talked to also suggested looking at the "returned" carbs too for the same reason. I think that would be an excellent choice. I did check ebay where they actually sell a lot of them and didn't see one as of yet. He told me that they're putting them there all the time, so I should check frequently.



I just wanted to ensure that I don't select under-sized carb....It appears that either the 390 or 470 will be a good choice.






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1955 F-600/272/E4OD// Disclaimer: No animals were injured while test driving my F-600 except the ones I ran over intentionally!

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This post was created using OpenSuSE Linux x64 and Firefox

A few thoughts from my experiments with carbs over the last few years, FWIW (on a 56 sunliner with 292/F/M)

The holley 390 is easy to tune, but hruns out of breath at higher RPMs.  Mathematically it probably shouldnt, but in back to back runs vs an edelbrock 500 cfm, ithad noticeably less top end power.  However, id had better throttle response and started easier.

Edelbrock 500 carb - pretty easy to tune once you figure it out, good top end power, not very crisp throttle response, and a really slight stumble if you try to cruise slowly right after idle/tip in.  Its been that way on every carter/edelbrock ive ever worked on or ridden in....not noticeable unless you do a lot of slow speed cruising (i.e. parades, etc, and even then its not bad/embarassing/bothersome..its just there)

Demon - I tried the route of getting a reman demon from Jegs.  It was a mess.  Missing retainer clip on the secondary rod, beat up float bowls, god knows what else.  To their credit, Jegs immediately offered to sell me a new one at the same price, and I returned the reman.  However, the new one has been crap too.  Ive not been able to get it to run right, and every time I take it apart to change jets, PV, etc, I find more and more metal filings/shavings and gasked chaff floating around in there.  As soon as I get the car running again, IM going to give it one more try and if i cant get it to work, im going to call jegs again to see if they will swap it or what... really disappointing, as most people rave about demons.

Just a few thoughts, FWIW

Ron Grove

Wauconda, IL

I've heard a couple of stories about gunky Demons - but I haven't seen one. My neighbor's new one hasn't hiccuped, and mine (the rebuilt) had to have steel needle and seats installed to handle crummy gas. After that, no worries. If you want to try one or price one call R&D Racing 952-469-3219.

I know more about de-bugging and tuning the Holley style carbs - so that's the way I went (45 years of tinkering). Seems to me the vacuum secondary has to be a basic advantage over the Edelbrock / Carter style outfits. I haven't seen any comments about the "Thunder" series with the Quadrajet style "air doors". 

 
 Steve Metzger       Tucson, Arizona

Based on what I've learned, another one you may want to check out is the Holley 465 cfm model L 1848. It's intended for Ford transmission setups, although I don't know about the AOD. In the recent carb tests written up in YBM, it was at the top of the unmodified units. Also, a buddy put one on his 56 with Fordomatic & was very pleased with it. Another possible one which is seldom discussed is the Ford Autolite 1.08 "flat top". According to Pony Carburetors it's one of the most trouble free & economical to operate 4 Bbls ever built. They were used on early Mustangs etc. It also tested well in our moderator Ted's, carb testing. Unfortunately, you can't buy a new one, so it's used or a rebuilt.

Paul

I have a 600 CFM Holley on my stock 292. Does great.

55Birdman  Hickory NC

I have a 465 0n my 55, more than enough carb, a very good choice. Gary

       

Gary, 55 Vicky, St. Germain, Wisconsin

 

Birdman, did you have to adjust the 600 cfm much to get it to run well?  I've got an Edelbrock auto carb on my 312 marine engine and want to replace it with a marine carb.  I'm leaning toward a Holley, but would rather go with a 600 CFM 4160 rather than the 450 CFM because they cost $100 less. 

Rick, when you called Holley, did they say that the 390 carb would bolt right up to your 292 or do you have to change the manifold? I want to keep my teapot but for reliability and tuning issues, the holley sounds pretty good to me. I have a 292 with a merc-o-matic, I hope you keep us all posted as to which carb you end up using and how it turns out.

Kev



Loving my Y!

Kevin Walshe

Costa Mesa, California