CRG Discussion Forum

Camaro Research Group Discussion => Mild Modifications => Topic started by: 67 kemie ss on February 14, 2016, 05:27:17 AM

Title: 4053 Holley carb replacement
Post by: 67 kemie ss on February 14, 2016, 05:27:17 AM
Hi

I have a stock 69Z with the original 4053 DZ carb.  I wouldn't mind something a little more street-able (smaller).  Several years ago, JohnZ had recommended the 600 Holley #0-80145 as a great bolt-on replacement.  That carb is no longer made, however, and the tech guys at Holley must be 19-year olds or something cause they don't know either.  What's the current replacement?  The HP series 650 (PN 0-80541-1) has also been recommended to me.  Thoughts?  Bear in mind I ain't a tech guy.  Thanks!
Title: Re: 4053 Holley carb replacement
Post by: janobyte on February 14, 2016, 10:43:28 AM
take a look:http://www.summitracing.com/parts/sum-m08601vs
Title: Re: 4053 Holley carb replacement
Post by: L78 steve on February 14, 2016, 03:45:04 PM
Save your money. You wont notice any difference. 302's are not very streetable to begin with.
Title: Re: 4053 Holley carb replacement
Post by: cook_dw on February 14, 2016, 06:53:48 PM
Jano those shoebox carbs are junk.  Same as the old 4010 Holleys..  If you want a smaller carb then go with either 0-80570 or 0-80670 Street Avengers with an electric choke.  Same inlet fuel locations and has a rear metering block same as the 4053..  Regardless you will have to tune the carb to the car..  Just $0.02 coming from a former Holley tech service guy..  ;)
Title: Re: 4053 Holley carb replacement
Post by: janobyte on February 14, 2016, 10:43:22 PM
oops! Just saw it in the flyer this morning, didn't read into it. Agree, junk carbs. Thought it was from the series you mentioned.

Title: Re: 4053 Holley carb replacement
Post by: cook_dw on February 14, 2016, 11:02:24 PM
Holley private labels those carbs for Summit.  Summit makes nothing on their own that I'm aware of..    Kicker is summit deals with the warranty & tech support on their name brand stuff.
Title: Re: 4053 Holley carb replacement
Post by: ban617 on February 15, 2016, 01:45:16 AM
What gear is in your Z that may have something to do with drivability, also the cam shaft may aswell ...
Title: Re: 4053 Holley carb replacement
Post by: z28z11 on February 15, 2016, 02:06:49 AM
Hi

I have a stock 69Z with the original 4053 DZ carb.  I wouldn't mind something a little more street-able (smaller).  Several years ago, JohnZ had recommended the 600 Holley #0-80145 as a great bolt-on replacement.  That carb is no longer made, however, and the tech guys at Holley must be 19-year olds or something cause they don't know either.  What's the current replacement?  The HP series 650 (PN 0-80541-1) has also been recommended to me.  Thoughts?  Bear in mind I ain't a tech guy.  Thanks!


Get you a good used or rebuilt List 4776 600 cfm double pumper. Plentiful, still made, mechanical secondaries, smaller bore size than the 4053 carbs, but still flows very well, plus at a glance it looks like the 4053 (it's a 4150 series carb anyway). Bolt up, no hassle, inexpensive - and just my opinion.

Regards,
Steve
Title: Re: 4053 Holley carb replacement
Post by: cook_dw on February 15, 2016, 02:09:45 AM
Steve that is a great choice but the double pumper wont work with the factory air cleaner.  Will still work but just need to run an aftermarket breather on the pass valve cover and run an aftermarket air cleaner base.
Title: Re: 4053 Holley carb replacement
Post by: z28z11 on February 15, 2016, 02:22:10 AM
I used to run an 4777 850 DP on my Z (with the open element stock cleaner), but then again the tube had been removed on the passenger side and a breather substituted on the PS valve cover. Are you thinking the linkage won't clear ? The vacuum pot on the 4053 passenger side sticks out farther than the secondary linkage on a DP that side -

My curiousity is up now - I'll have to dig the 4777 out and match it up on the intake/cleaner to see the interference(s).

Thanks,
Steve
Title: Re: 4053 Holley carb replacement
Post by: cook_dw on February 15, 2016, 04:17:55 AM
The tube on the air cleaner interferes with the mech secondaries.  I removed the tube on the green 69 when I installed an ultra HP 750.  Other than that it'll work.
Title: Re: 4053 Holley carb replacement
Post by: janobyte on February 15, 2016, 11:05:01 AM
Holley private labels those carbs for Summit.  Summit makes nothing on their own that I'm aware of..    Kicker is summit deals with the warranty & tech support on their name brand stuff.

Come on, I know Summit/Jegs don't make parts.
Title: Re: 4053 Holley carb replacement
Post by: janobyte on February 15, 2016, 11:11:08 AM
Have heard nothing but good about the HP series. Making good numbers on the dyno right out of the box. More race bred.
Title: Re: 4053 Holley carb replacement
Post by: cook_dw on February 15, 2016, 12:41:43 PM
I wasn't singling you would..  Lol. Just making a general statement. HP Series are hands down the best race carb Holley has..  I can't remember exact #s but when I who he'd from a 4053 on my old 69 I gained HP & TQ on the chassis dyno.  I miss having that luxury.  :(  My HP carb was a half breed.  750 base with a straight leg booster.  I loved it for its tune ability.
Title: Re: 4053 Holley carb replacement
Post by: L78 steve on February 15, 2016, 03:13:44 PM
The 4777 is a good drag strip carb for the 69Z for sure. That is what I'm running now on my 69. I believe its a 650 CFM and I'm running the re-pop ZL-2 base with the double 45 degree bends in the vent tube to clear the secondary pump arm. I have it so the air door flapper is sync'd with the secondarys.
Title: Re: 4053 Holley carb replacement
Post by: X33RS on February 15, 2016, 03:54:48 PM
I'm going to run (daily drive) the original DZ carb on mine, it's too expensive to just toss on the shelf and not use it, lol.
I'm an HP carb fan as well.  I run a 950HP on a 454, and that same carb will go into service on the new 502 I'm building.  The 571 my father runs that I had a post about in the garage talk section also uses a 950HP that I setup on the previous 455 he ran.  On the dyno they compared it to Tony's favorite dominator mule carb and that little HP was only down a few HP from the dominator.  Tony was really impressed with it and liked that carb.

   My favorite aspect of them are the replaceable air bleeds.  It's a tuners dream living up here at 5,000 ft and driving down to sea level fairly often.  I can pop the air cleaner lid and make a quick air bleed change and it's ready to rock.  I can go 3 numbers on the high speeds and it knocks it down .5 on the AFR gauge.
Title: Re: 4053 Holley carb replacement
Post by: janobyte on February 15, 2016, 09:43:42 PM
Same: locals finding good dyno numbers out of the box, little less $$ then a custom carb. I think they are actually flowing the advertised numbers. Lets not forget Holley wrote the book on carb mods ( literally, still have a copy from around 20 years ago) Actually my Dad was very pleased with an Edelbrock he had on the 302 when it was on hiatus in a street rod, but I'm just partial to Holley's, and know them pretty well.

lol, APD Racing rebuilt my old 850 double pumper I bought from Super Shops years ago. Alive and well in the race car.
Title: Re: 4053 Holley carb replacement
Post by: X33RS on February 15, 2016, 10:43:36 PM
Yep I have that holley book too, got versed on them at an early age.  Now rebuild/tune/modify them for customers as well as quadrajets.  I get a lot of that being up here at 5,000 ft.  After all the restoration is done, the tuning is always the most fun for me.
Title: Re: 4053 Holley carb replacement
Post by: dale_z28 on February 16, 2016, 02:01:34 PM
Anybody use or hear anything about Sean Murphy Induction? I read an article in Hemmings Muscle Machines about their services on Holleys (especially idle circuit revamping). Sounds really interesting to me. I haven't driven my car for 25+ years but when I did, lope-ing around parking lots was difficult because the low idle caused vacuum problems (loss of boosted brakes) and sometimes if you cranked the wheel to hard/fast, the engine would die. I'll run my original Holley for awhile, but I'm also interested in doing an EFI conversion to be able to use a computer-controlled system. It just sounds too appealing. Sorry to the purists out there, but technology has too much to offer, and I won't do anything that can't be reversed.
Title: Re: 4053 Holley carb replacement
Post by: X33RS on February 16, 2016, 03:02:39 PM
Idle circuit mods are pretty simple.  I use a wideband to dial in everything.  In most cases idle feed restrictors don't need attention unless you get into large cams with a lot of overlap.  Then I find I have to enlarge the idle feed restrictors for a little more fuel flow and make the idle mixture screws more responsive.  Very small steps here.

On the DZ carbs, if running the stock DZ cam and intake, I find I don't need any extra idle circuit mods if the correct metering blocks are used.   The cam is actually pretty tame even with it's 254 @ .050 duration, the LSA is spread out to 114, not a lot of overlap and with timing properly set they actually idle pretty smooth and I get about 13-14 inches of manifold vacuum.
   Set up the distributor with 18 initial, and about 18-20 degrees of centrifugal advance. I shoot for 36 to 38 total, that's where they make best power, and with the advance slow enough it will work on pump gas with 11:1 and a real DZ cam, all coming in about 2600-2800.  More aggressive here and you might find yourself running race fuel when it's hot outside.
      I then plug vacuum advance to manifold vacuum (I don't use the original ported location) this gives about an extra 12 degrees or so at idle and increases your manifold vacuum, smooths the idle out a bit and helps with throttle response.    Only after all this is set properly, then I begin on the carb tuning.
   On the dyno with stock carb and intake, I find stagger jetting wakes these little engines up.  I find going 2 sizes up on the driver side of the carb makes a tad more power.   I usually end up with 72-74 front, and 76-78 rear, with the larger jets on the driver side.  Works good when down near sea level.  I tweak that a bit for our 5,000 ft elevation.
   With the carb and timing setup properly, they will idle and drive around in traffic all day long without a hiccup.    I have no problem turning my wife loose in it to daily drive. 

   We have gone the other direction as we get older.  We've had LS powered cars (5 at one time) I've done LS swaps in vintage iron for myself and still do for customers.  Nowadays just kind of sick of it all.  My wife is too, she even sold her newer SS Camaro because she just wants to drive the 69 Z, she likes carbs and points, just the simplicity and low cost of it all is more appealing to use now.  It helps that she has her own tuning guru to keep things tip top.
Hope this helps.
Title: Re: 4053 Holley carb replacement
Post by: dale_z28 on February 16, 2016, 04:18:14 PM
Thanks for the info, X33RS! I've got you on speed-dial (here we refer to it as our "buddy list") so when it's time I may get with you on tuning tips.
As an aside, you touched on another aspect that is in the back of my mind: my wife driving my Z... I can't wait!! I remember the look in my moms eyes after the first time she drove my car back in the late '70's... Seems like she warned me less about keeping my foot out of it after she found out SHE couldn't!