Khubred

I have a 66 chevelle with a 66 Corvette Motor/Tranny - 327/350HP (pretty much Stock) with a 600 CFM Holley. the holley probably needs rebuild because it was leaking all over and dripping gas inside - floats probably stuck. It was sitting for about 6 months. I'm not GREAT at adjusting a carb, and have heard that the Holley usually needs to be adjusted all the time to make it run right. I believe it's an old school Holley, 1850-2 "4160" 600 CFM. ....

The Manifold is a snowflake Weiand, 66, which is performance for its day...

I'm looking for a good carb, not going to race, just routine regular driving. I'd like performance, and know that the Eddy has no comparison to the Holley, but wondering if I should keep the Eddy and rebuild or go with a 600 CFM Eddy or QF....

Any pros or cons based on your experience?


Thanks in advance

DansYellow66

You can send your Holley off to them (Holley) to rebuild. When it comes back it will be as good as new and should bolt on, start up and run for years without touching. Or, if you prefer to go aftermarket I hear lots of good things everywhere about Quickf Fuel.

mike16

Dont be intimidated by the range ofadjustments on the holley. Its easy enough just to build it and get it to operate with in the "envelope". There are about 3-4 diffinitive books on the holley out there. buy them and read read them over a few times and you will then be able to get your carb pretty much sorted out they way you like it.

even if you go for the factory rebuild the books describe quite a few external adjustments that can be made.

I hear Holley does a super job on thier rebuilds

MikeM

[QUOTE=Khubred;1581843681]I have a 66 chevelle with a 66 Corvette Motor/Tranny - 327/350HP (pretty much Stock) with a 600 CFM Holley.

......and have heard that the Holley usually needs to be adjusted all the time to make it run right. I believe it's an old school Holley, 1850-2 "4160" 600 CFM. ....

The Manifold is a snowflake Weiand, 66, which is performance for its day...

... the Eddy has no comparison to the Holley, but wondering if I should keep the Eddy and rebuild or go with a 600 CFM Eddy or QF....

QUOTE]

I'm totally mystified by some of your terminolgy but be that as it may, fix the Holley. You can't beat them for street driving and when set up like they're supposed to be, require no fiddling or constant maintainance. Anybody that says different either has had experience with one that has had some ham fist working on it or they just read same off the internet.

If your carb is originally from a SHP Chevrolet engine and you send it to Holley, they will replace valuable parts on it and you will lose the value of your carb. On the other hand it should be okay and I don't see any reason they can't send your removed parts back with the rebuild.

65tripleblack

Let me start off by saying that I'm a big fan of Holley and any of its clones. I have no experience with Edelbrock carbs, but notice that they seem to be the big ticket for street rods with low performance engines.

I have a QF carb, and can say that it's very high quality and very adjustable, and made of 100% aluminum (no pot metal) for light weight and COOLER RUNNING. They are maybe 15-20 percent more expensive than the Holley traditional series. Holley aluminum Street Avenger or Ultra Street Avenger should be comparable. Both Holley and QF are headquartered and built in Bowling Green KY.

You can try having your old Holley rebuilt first, before forking over the big bucks for a new one. Custom Carburetors in Middlesex NJ is the best you can get for Holley rebuilding. As good or better than Holley itself:
http://customrebuiltcarbs.com/

If the carb is old, then remember that it might have been fuc*ed with at some time in the past, and even the BEST rebuilders won't find a modified internal passage unless EVERY orifice and passageway is flow tested. I don't believe that any rebuilder, not even Holley, does this. It's still old tech, pot metal, with non-externally adjustable side hung floats, and secondary metering plate (4160 didn't use secondary metering block).

Khubred

[QUOTE=65tripleblack;1581844742]Let me start off by saying that I'm a big fan of Holley and any of its clones. I have no experience with Edelbrock carbs, but notice that they seem to be the big ticket for street rods with low performance engines.

I have a QF carb, and can say that it's very high quality and very adjustable, and made of 100% aluminum (no pot metal) for light weight and COOLER RUNNING. They are maybe 15-20 percent more expensive than the Holley traditional series. Holley aluminum Street Avenger or Ultra Street Avenger should be comparable. Both Holley and QF are headquartered and built in Bowling Green KY.

You can try having your old Holley rebuilt first, before forking over the big bucks for a new one. Custom Carburetors in Middlesex NJ is the best you can get for Holley rebuilding. As good or better than Holley itself:
http://customrebuiltcarbs.com/

If the carb is old, then remember that it might have been fuc*ed with at some time in the past, and even the BEST rebuilders won't find a modified internal passage unless EVERY orifice and passageway is flow tested. I don't believe that any rebuilder, not even Holley, does this. It's still old tech, pot metal, with non-externally adjustable side hung floats, and secondary metering plate (4160 didn't use secondary metering block).

Thanks, just got back from buying a QF for this buggy... I appreciate your input!

Kevin

joebobbilly

That holley does have externally adjustable floats. I can't think of a true holley that doesn't. Pot metal has a better tolerance to electrolysis. All carbs are 'old tech'.

You can make easy low 12 second power with a 600 holley.

That carb is rebuildable in about 15 minutes and adjustable in 2 minutes. Only takes longer if the gaskets are stuck like hell or it's been in the weather.

65tripleblack

You're correct. The 1860 does not:
http://www.buy.com/prod/holley-0-185...ngId=210606736

"..................4160 model 4-barrel carburetors from Holley feature their new Tru-Set needle and seats, which eliminate the need for external float adjustments......................"

Plasticman

If the manifold has a snowflake and "W", that is not a Weiand. It is a factory GM manifold produced by "Winters Foundry".

http://speedtalk.com/forum/viewtopic.php?f=1&t=22374

Plasticman

mike16

that snow flake shows up on alot of aftermarket intakes. winters did not just produce for chevy/gm

leaky4150

purchased holly 4150 book/ used overhaul manual purchased correct jets/power valves and set per w/shop manual no problem w/carb except occasional re tighten of bowl screws

MikeM

I would proceed with caution. That's one of the reasons Holleys leak is because someone overtightens the bowl screws to stop a leaky gasket and winds up warping the main body and metering plates.

Plasticman

I did not say Winters produced them for just GM........ Read what I said. What I said is that a snowflake is the Winters Foundry symbol (and does not indicate it is a Weiand manifold).

Yes, I understand that Winters Foundry produced parts for several other companies.......but that symbol is found on most (if not all) GM Chevy aluminum manifolds.

Plasticman

JohnZ

'67 Corvette 4-barrel Holleys (3810 & 3814 on 327/300 and 327/350 and 3811 & 3815 on 427/390) had non-externally adjustable floats.

wmf62

i've never had a Holley with externally adjustable floats. i don't mean they don't make them, just that every Holley carbed engine i've owned didn't have externally adjustable floats.
Bill

Khubred

Does anyone know how much fuel pressure a 327/350HP produces?

Kevin

JohnZ

5 to 6-1/2 psi.

joebobbilly

true holley, not factory spec holley.

you can easily put holly bowls that have adjustable floats on the above carbs

and most of the factory spec ones are adjustable, like a 3613

4150 series holley parts interchange like sbc stuff

float adjustment on holleys really aren't that critical. just being within the realm of close will take care of any street application....and i'm talking +-1/8 inch up or down (from correct height) for 1/4" total travel on the setting.

wmf62

what's your point? non-externally adjustable, OEM Holley carbs do exist; i have several.
Bill

joebobbilly

What is your point? The OP has a carb with adjustable floats. Rebuilt and properly adjusted (an exercise that can be done in less that a half hour), that design carb is hard to beat, as far as reliability and performance.

Any new 'trick of the week' carb is just another carb. We aren't prostocking here.