Holley 4777 vs. 6210 - Team Camaro Tech
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post #1 of 15 (permalink) Old Apr 18th, 11, 08:31 PM Thread Starter
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Holley 4777 vs. 6210

I'm going to be running Vortec heads and intake.

Looking at the Holley 4777 and the 6210.

Aside from the 4777 being squarebore and dual feed, what differences can I expect between the two? I'm guessing the single feed would have better MPGs?

The 6210 is more $ than the 4777, when purchased new, but I'm seeing reman'd 6210's on ebay that are cheaper than the reman'd 4777's. So the 6210 is looking more attractive from a $ standpoint.

Also, I read that the choke on the 6210 is "divorced." What does that mean compared to a manual choke?

The vortec intakes supposedly accept square- or spreadbore, but is one going to run better than the other?

Thanks!
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post #2 of 15 (permalink) Old Apr 18th, 11, 08:49 PM
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Re: Holley 4777 vs. 6210

A divorced choke uses a bimetal spring attached to the intake manifold to operate the choke butterfly.
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post #3 of 15 (permalink) Old Apr 18th, 11, 09:03 PM Thread Starter
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Re: Holley 4777 vs. 6210

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Originally Posted by 1968RallySport View Post
A divorced choke uses a bimetal spring attached to the intake manifold to operate the choke butterfly.
OK, I'm operating at the level of a 4th grader here: which is better?

BTW: I just read this thread, https://www.camaros.net/forums/showthread.php?t=194219. Don't want anyone to have to repeat themselves.
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post #4 of 15 (permalink) Old Apr 18th, 11, 09:14 PM
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Re: Holley 4777 vs. 6210

Depends on your mechanical aptitude. If you're the mechanically inclined type, you would probably use a manual choke or remove the choke all together. If you aren't mechanically inclined you may want to use a divorced choke. The spreadbore MAY give you a little better fuel mileage. Just my opinion.
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post #5 of 15 (permalink) Old Apr 18th, 11, 09:23 PM Thread Starter
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Re: Holley 4777 vs. 6210

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Originally Posted by 1968RallySport View Post
Depends on your mechanical aptitude. If you're the mechanically inclined type, you would probably use a manual choke or remove the choke all together. If you aren't mechanically inclined you may want to use a divorced choke. The spreadbore MAY give you a little better fuel mileage. Just my opinion.
Yeah, I keep reading where people just ditch their manual chokes. Believe it or not, I actually rebuilt the carb on my Jeep CJ7 several years ago. So, I think I could probably handle pulling the choke off a Holley -- although I'd definitely have some reading up on it to do... Really don't have much need for choke in Texas. Cold starts are few and far between.

Thanks for the feedback.
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post #6 of 15 (permalink) Old Apr 18th, 11, 09:37 PM
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Re: Holley 4777 vs. 6210

Zac, I have no doubt you can do it FWIW, I don't use a choke, not needed in Northern California
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post #7 of 15 (permalink) Old Apr 18th, 11, 09:38 PM
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Re: Holley 4777 vs. 6210

The 6210 is basically a Q-jet replacement carb. I have nothing to back this up, but have heard that it's not Holley's best effort. Spread bore double pumper.

The 4777 is the old tried and true square bore double pumper - great carb, but not the best for fuel economy, if that's what you're after. (I use a 4778 - 700 CFM - and I love it, stinky idle notwithstanding) The 4777 as delivered won't have a choke. (I think) Oops - looks like I'm wrong on that!

The 3310 is another tried & true Holley - square bore, vac secondary 750 CFM and will run well on just about anything.

Some also like the vac secondary Holley Street Avengers

Either of the dual feed Holleys (4777, 3310, Street Avenger) will require the appropriate fuel line set. The 69 Z/28 repro set will work great. (Be careful on the 3310 - some are 4160 style with a metering plate on the secondaries, which requires a shorter secondary fuel line)

Decisions decisions


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post #8 of 15 (permalink) Old Apr 18th, 11, 09:47 PM Thread Starter
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Re: Holley 4777 vs. 6210

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Originally Posted by BPOS View Post
The 6210 is basically a Q-jet replacement carb. I have nothing to back this up...
Decisions decisions
I read that same comment somewhere, so at least one other person believes that.

I don't know enough about cards to have an opinion on the Q-jet. But I do know I cannot stand my elec choke Eddy. Never runs right.

That said, I have been reading up on vac vs. mech secondaries, and I decided I want mech. MPGs are not really a factor for me, as this is really just a weekend driver... Although at $3.69/gallon (for now), I may be looking at a hybrid conversion before it's all said and done.

You're right, Al: decisions, decisions.
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post #9 of 15 (permalink) Old Apr 18th, 11, 10:41 PM
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Re: Holley 4777 vs. 6210

i guess between the 2 the 4777-gonna be a hot one down here in tx tommorow-vac sec work alittle better on the street and response in my opinion unless you got some hp
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post #10 of 15 (permalink) Old Apr 19th, 11, 05:15 PM Thread Starter
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Re: Holley 4777 vs. 6210

A friend just put in a vote for the 4150. Dang, this is hard.
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post #11 of 15 (permalink) Old Apr 19th, 11, 05:27 PM
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Re: Holley 4777 vs. 6210

The 4150 is a "style" of Holley. The 4777 is a 4150. I "believe" that 4150 means it is a dual feed, square bore with metering blocks front and rear. (Dominators excluded) 4160 replaces the rear metering block with a metering plate. The difference being that the 4150 has replaceable and therefore adjustable jets on the secondary side and the 4160 doesn't. And I could be totally wrong.


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post #12 of 15 (permalink) Old Apr 19th, 11, 06:50 PM Thread Starter
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Re: Holley 4777 vs. 6210

Ohhhhh! Gotcha. Well, that's good, b/c I'm already having a hard enough time whittling down the differences with two -- three would have blown my mind!

Thanks, Al.
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post #13 of 15 (permalink) Old Apr 19th, 11, 08:09 PM
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Re: Holley 4777 vs. 6210

Zac,

My vote is for the street avenger 670:

http://www.holley.com/0-80670.asp
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post #14 of 15 (permalink) Old Apr 19th, 11, 08:12 PM
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Re: Holley 4777 vs. 6210

go with th 4777...great carb for street use, and the double pumper is the way to go with a manual transmission...if manual transmission, much better throttle response than a vacuum secondary carb...

Keith
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post #15 of 15 (permalink) Old Apr 19th, 11, 08:43 PM Thread Starter
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Re: Holley 4777 vs. 6210

Beth, I think I've talked myself out of the idea of VS carbs... Not entirely sure why, other than a couple of friends have them and like them. I could probably be persuaded otherwise though!

Keith, I'm running a 700r4. The Z emblems are nothing but show.
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