Identify Hollet carb
Pro
Joined: Jul 2010
Posts: 691
Likes: 25
From: Boynton Beach Florida
It's a spreadbore replacement for a quadrajet. If you look at the front of the air horn on the left side (throttle) you'll find a number just below the choke opening. Usually starts with a 0-0000. You can do a google search with that number and determine what size and application the carb is for. A common universal 650 cfm spreadbore is the 0-6210 as an example.
Pro
Joined: Jul 2010
Posts: 691
Likes: 25
From: Boynton Beach Florida
Thread Starter
Racer
Joined: Apr 2011
Posts: 471
Likes: 3
Yes guys I know its an Holley and the seller says its model is 70Q02-1 but I found no reference of this model around.... I've seen its a speadbore, maybe the 0-80555C???
What about its aspect? I would like to go to look at it, what should I look for in order to udnerstand if it's worth buying it?
What about its aspect? I would like to go to look at it, what should I look for in order to udnerstand if it's worth buying it?
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Pro
Joined: Jul 2010
Posts: 691
Likes: 25
From: Boynton Beach Florida
Here is a good spec sheet.
http://www.holley.com/data/Products/...199R8340-1.pdf
Carb rebuild kit if you end up buying it
http://www.carbkitsource.com/carbs/kits/CK293.htm
Every indication is it's a 650 cfm vacuum secondary. I saw one thread where a guy said he took this model and List number off of a 396 Chevelle but he didn't state it was original to the car.
http://www.holley.com/data/Products/...199R8340-1.pdf
Carb rebuild kit if you end up buying it
http://www.carbkitsource.com/carbs/kits/CK293.htm
Every indication is it's a 650 cfm vacuum secondary. I saw one thread where a guy said he took this model and List number off of a 396 Chevelle but he didn't state it was original to the car.
Tech Contributor
Joined: Aug 1999
Posts: 14,379
Likes: 6,390
From: At my Bar drinking and wrenching in Lafayette Colorado
Holley List Number 7002-1 is a model 4175 Spreadbore Q-Jet replacement carb that is emissions-legal in California. It's 650 cfm, but it's jetted very lean for most performance applications. It uses a primary metering block, but has a seoncary metering plate, limiting its tunability on the secondary side. It also uses the big, stiff "black" secondary spring, which will prevent the secondaries from coming anywhere close to fully open, even at WOT. The carb can be set up to run well, but it will need some thoughtful tuning to reach its real potential.
Holley 4165 and 4175 spreadbore carbs were never used as an OEM carb by GM.
Lars
Lars
Last edited by lars; Mar 6, 2012 at 10:12 AM.
Thread Starter
Racer
Joined: Apr 2011
Posts: 471
Likes: 3
Holley List Number 7002-1 is a model 4175 Spreadbore Q-Jet replacement carb that is emissions-legal in California. It's 650 cfm, but it's jetted very lean for most performance applications. It uses a primary metering block, but has a seoncary metering plate, limiting its tunability on the secondary side. It also uses the big, stiff "black" secondary spring, which will prevent the secondaries from coming anywhere close to fully open, even at WOT. The carb can be set up to run well, but it will need some thoughtful tuning to reach its real potential.
Holley 4165 and 4175 spreadbore carbs were never used as an OEM carb by GM.
Lars
Holley 4165 and 4175 spreadbore carbs were never used as an OEM carb by GM.
Lars
good to see you back to the forum!
Can I reuse the fuel line of the Qjet?
Can I change jet and secondary spring?
By the way I've a stock SB and a original Qjet which seems to flood...
Thanks
Tech Contributor
Joined: Aug 1999
Posts: 14,379
Likes: 6,390
From: At my Bar drinking and wrenching in Lafayette Colorado
If you have the original Q-Jet, fix it.
The Holley can be tuned and set up to run well, but you're a heckuva lot better off fixing the original carb.
Yes, the oriignal fuel line will mate with the Holley with minor bending and tweaking. The Holley also is not likely to have all the vacuum hose provisions of your original carb.
The Holley rebuild kit will run you about $90 compared to the Q-Jet kit at $35, so you'll be dumping more money into a carb which will require significantly more tuning and setup work than the original carb.
Lars
The Holley can be tuned and set up to run well, but you're a heckuva lot better off fixing the original carb.
Yes, the oriignal fuel line will mate with the Holley with minor bending and tweaking. The Holley also is not likely to have all the vacuum hose provisions of your original carb.
The Holley rebuild kit will run you about $90 compared to the Q-Jet kit at $35, so you'll be dumping more money into a carb which will require significantly more tuning and setup work than the original carb.
Lars
Drifting
Joined: Jun 2011
Posts: 1,704
Likes: 27
I have this carb and while tuning it, just now finding this out. Wish now I would have gone to mechanical secondary carb.
Race Director
Joined: May 2006
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Drifting
Joined: Jun 2011
Posts: 1,704
Likes: 27
Thread Starter
Racer
Joined: Apr 2011
Posts: 471
Likes: 3
If you have the original Q-Jet, fix it.
The Holley can be tuned and set up to run well, but you're a heckuva lot better off fixing the original carb.
Yes, the oriignal fuel line will mate with the Holley with minor bending and tweaking. The Holley also is not likely to have all the vacuum hose provisions of your original carb.
The Holley rebuild kit will run you about $90 compared to the Q-Jet kit at $35, so you'll be dumping more money into a carb which will require significantly more tuning and setup work than the original carb.
Lars
The Holley can be tuned and set up to run well, but you're a heckuva lot better off fixing the original carb.
Yes, the oriignal fuel line will mate with the Holley with minor bending and tweaking. The Holley also is not likely to have all the vacuum hose provisions of your original carb.
The Holley rebuild kit will run you about $90 compared to the Q-Jet kit at $35, so you'll be dumping more money into a carb which will require significantly more tuning and setup work than the original carb.
Lars
I have already rebuilt the Qjet (it's the first time for me so maybe I got something wrong, even if it was very fun...) and I noticed the horn is a bit bended (about 1mm in the middle). Trying to fix a bended horn seems to me quite difficult, maybe try to find a good one somewhere... what do you think? do I have to find the same year model? I've a 7044207 SN... Thanks
Thread Starter
Racer
Joined: Apr 2011
Posts: 471
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Le Mans Master
Joined: Apr 1999
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From: Raleigh North Carolina