RE: [Chevelle-List] Choke help
Replies to this message are sent to The Chevelle Mailing List what are the specs of the carb? how much are you asking? -Original Message- From: Jeff Fischer [mailto:[EMAIL PROTECTED]] Sent: Saturday, February 23, 2002 11:54 AM To: [EMAIL PROTECTED] Subject: RE: [Chevelle-List] Choke help Replies to this message are sent to The Chevelle Mailing List Great! Anyone want to buy a used carb cheap? :) At 03:21 PM 2/22/2002 -0800, you wrote: Replies to this message are sent to The Chevelle Mailing List From: Jeff Fischer Subject: RE: [Chevelle-List] Choke help Thank You John, the carb is a Rochester 7042210QE 0872 Hey, I can answer this! I found a great Q-Jet tuning paper at this great page of reference papers: http://www.corvettefaq.com/engine.asp Or, to download it directly, click here: http://www.corvettefaq.com/c3/QJet_Tuning_Paper.doc It decodes your carb as: 70 Pre-1976 Q-Jet 42 1972 is the exact year 2 49-State Carburetor 1 Chevrolet 0 Automatic Transmission This is as far as the paper decodes, but... QE Sorry, no idea 0872 Don't know, but I would guess August, 1972? Brad Waller ([EMAIL PROTECTED]) '66 Convertible | 327/dead | 4-speed | Wilwood Brakes | 245/45/16 BFGs '67 Chevelle| ex-SS396 | 355/700R4 | '79 F-Body Brakes - To Unsubscribe please visit www.chevelles.net/list.html To start a new topic, send mail to: [EMAIL PROTECTED] - To Unsubscribe please visit www.chevelles.net/list.html To start a new topic, send mail to: [EMAIL PROTECTED] - To Unsubscribe please visit www.chevelles.net/list.html To start a new topic, send mail to: [EMAIL PROTECTED]
Re: [Chevelle-List] Choke help
Hello, I have tried to unsubscribe from this list but it did not work. Could someone please unsubscribe me? Thanks. Pat Walsh [EMAIL PROTECTED]
RE: [Chevelle-List] Choke help
Did you follow the instructions at http://www.chevelles.com/lists/#145? I've had to unsubscribe and resubscribe again and it worked for me. If that doesn't work, send the same information (name/email/etc) to [EMAIL PROTECTED] and I'm sure he'll be happy to remove you from the list. BTW, I usually like it when people change the Subject line when changing threads, but in your case I kinda like it. :*) Others on the list will know what I mean. Dale -Original Message-From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of [EMAIL PROTECTED]Sent: Saturday, February 23, 2002 11:22 PMTo: [EMAIL PROTECTED]Subject: Re: [Chevelle-List] Choke helpHello, I have tried to unsubscribe from this list but it did not work. Could someone please unsubscribe me? Thanks. Pat Walsh [EMAIL PROTECTED]
RE: [Chevelle-List] Choke help
Replies to this message are sent to The Chevelle Mailing List Thank You John, the carb is a Rochester 7042210QE 0872 Jeff At 11:02 PM 2/21/2002 -0500, you wrote: Replies to this message are sent to The Chevelle Mailing List Jeff, you sent me an email yesterday asking if I had a pic of a certain Q-jet. I can't find your message. Would you mind re-posting that carb# and I'll see if there is a pic in my Rochester book? For those of you who don't have Doug Roe's Rochester Carburetors it's a good book to have around. John Nasta - To Unsubscribe please visit www.chevelles.net/list.html To start a new topic, send mail to: [EMAIL PROTECTED] - To Unsubscribe please visit www.chevelles.net/list.html To start a new topic, send mail to: [EMAIL PROTECTED]
RE: [Chevelle-List] Choke help
Replies to this message are sent to The Chevelle Mailing List Jeff, I don't see your particular carb. in the book. The book is more about rebuilding and modifying q-jets than identifying them. It does have exploded diagrams of the 4G/4GC (used from 1952-67), the M4ME (1981-86), the E4MED (1985-86), the E4ME (1981-86), and several 2bbls monojet carbs. It also goes into great detail about metering, jetting, and other ways to modify a Q-jet for max performance for your car. For instance, you can figure out the max air flow requirement of your engine by ((CID x max-RPM) / 3456) x volumetric efficiency. So, if you 350 w/ a max RPM of 7000 and 100% volumetric efficiency, the formula is ((350 x 7000) / 3456) x1 = 709 cfm. This is a great book. Everybody who likes to work on their own Q-jet should own a copy IMO. Rochester Carburetors ISBN 0-89586-301-4 by Doug Roe / Berkley Publishing. I also have an exploded diagram of the 4MV, which is probably what you have (and is not in this book). I posted it at: http://johnnasta.com/6898/resources/1968/carb-4mv.jpg if anybody is interested. For the IE6 users, there is a new feature that automatically downsizes the image to fit your screen. If you put your mouse over the image, you will get an icon that looks like a box with arrows coming out of the corners. If you click that icon, it will expand the image to full size. It's hard to read if you don't expand it. Seems like every time Microsoft makes their software automatically do something, I have to spend an hour figuring out how to disable the wonderful new feature. That's a topic for another list though... John Nasta Old Car Network http://oldcarnetwork.com -Original Message- Thank You John, the carb is a Rochester 7042210QE 0872 - To Unsubscribe please visit www.chevelles.net/list.html To start a new topic, send mail to: [EMAIL PROTECTED]
RE: [Chevelle-List] Choke help
Replies to this message are sent to The Chevelle Mailing List From: Jeff Fischer Subject: RE: [Chevelle-List] Choke help Thank You John, the carb is a Rochester 7042210QE 0872 Hey, I can answer this! I found a great Q-Jet tuning paper at this great page of reference papers: http://www.corvettefaq.com/engine.asp Or, to download it directly, click here: http://www.corvettefaq.com/c3/QJet_Tuning_Paper.doc It decodes your carb as: 70 Pre-1976 Q-Jet 42 1972 is the exact year 2 49-State Carburetor 1 Chevrolet 0 Automatic Transmission This is as far as the paper decodes, but... QE Sorry, no idea 0872 Don't know, but I would guess August, 1972? Brad Waller ([EMAIL PROTECTED]) '66 Convertible | 327/dead | 4-speed | Wilwood Brakes | 245/45/16 BFGs '67 Chevelle| ex-SS396 | 355/700R4 | '79 F-Body Brakes - To Unsubscribe please visit www.chevelles.net/list.html To start a new topic, send mail to: [EMAIL PROTECTED]
RE: [Chevelle-List] Choke help
Replies to this message are sent to The Chevelle Mailing List Thanks Brad. Awesome link! - To Unsubscribe please visit www.chevelles.net/list.html To start a new topic, send mail to: [EMAIL PROTECTED]
RE: [Chevelle-List] Choke help
Replies to this message are sent to The Chevelle Mailing List Jeff, you sent me an email yesterday asking if I had a pic of a certain Q-jet. I can't find your message. Would you mind re-posting that carb# and I'll see if there is a pic in my Rochester book? For those of you who don't have Doug Roe's Rochester Carburetors it's a good book to have around. John Nasta - To Unsubscribe please visit www.chevelles.net/list.html To start a new topic, send mail to: [EMAIL PROTECTED]
Re: [Chevelle-List] Choke help
Replies to this message are sent to The Chevelle Mailing List Jeff... Your Carb # is 7042210QE 0872 1972 Quadra-Jet installed in a Chevy Automatic according to this chart http://www.weber-carburetors.com/quadnumber.htm For your vacuum lines ...on my Q-jet the front one you have circled goes to the distributor vacuum advance and the second one on the side of the choke on mine is blocked off but the Q-jet literature I have says it goes to the air cleaner assmbley arrestor (mine doesn't have one so it is blocked off). Hope this helps. Mel 67 Malibu SS - Original Message - From: Jeff Fischer [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Tuesday, February 19, 2002 9:39 AM Subject: RE: [Chevelle-List] Choke help Replies to this message are sent to The Chevelle Mailing List Ok, got the carb back and does it look nice. As far as the carb number, that is a little baffling to me as there are numbers all over the damn thing. Here are a couple possibilities, 42742 and 7042210QE 0872 If neither of these are the correct number, any hints where the carb number is located would be helpful. On the front of the carb there is a vacuum port that was blocked up with rubber hose and a screw in it. The guy at the carb shop suspected it went to the distributor but that is piped off the side. Any ideas on what is might be for? Here is a picture of it, http://people.mn.mediaone.net/addss/plugport.jpg http://people.mn.mediaone.net/addss/unkport.jpg Also I noticed a small pigtail clip just hanging in the air that is coming from a small condenser looking thing mounted to the back of the coil, here is a pic of it, hope you can see it. http://people.mn.mediaone.net/addss/pigtail.jpg This pic shows the lower or closest port running off to the distributor and on the front the plugged up port http://people.mn.mediaone.net/addss/vacport1.jpg Where should this go? Amazing the car runs with all this stuff disconnected or mickey moused! In the service manual I can only find them torqueing down a different looking carb where they say to tighten all bolts first to 36 in. lbs. then finish tightening to 144 in. Lbs. Does this sound correct? - To Unsubscribe please visit www.chevelles.net/list.html To start a new topic, send mail to: [EMAIL PROTECTED]
Re: [Chevelle-List] Choke help
Replies to this message are sent to The Chevelle Mailing List Thanks Mel, If the weber site is always correct, it looks like I do not have the original carb. *sigh* -- Jeff Fischer Lake Elmo, MN '71 Chevelle SS, 454, 4 spd, matching numbers (In process of restoration when spring gets here) :) http://people.mn.mediaone.net/addss/chevelle.html At 12:46 PM 2/19/2002 -0800, you wrote: Replies to this message are sent to The Chevelle Mailing List Jeff... Your Carb # is 7042210QE 0872 1972 Quadra-Jet installed in a Chevy Automatic according to this chart http://www.weber-carburetors.com/quadnumber.htm For your vacuum lines ...on my Q-jet the front one you have circled goes to the distributor vacuum advance and the second one on the side of the choke on mine is blocked off but the Q-jet literature I have says it goes to the air cleaner assmbley arrestor (mine doesn't have one so it is blocked off). Hope this helps. Mel 67 Malibu SS - Original Message - From: Jeff Fischer [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Tuesday, February 19, 2002 9:39 AM Subject: RE: [Chevelle-List] Choke help Replies to this message are sent to The Chevelle Mailing List Ok, got the carb back and does it look nice. As far as the carb number, that is a little baffling to me as there are numbers all over the damn thing. Here are a couple possibilities, 42742 and 7042210QE 0872 If neither of these are the correct number, any hints where the carb number is located would be helpful. On the front of the carb there is a vacuum port that was blocked up with rubber hose and a screw in it. The guy at the carb shop suspected it went to the distributor but that is piped off the side. Any ideas on what is might be for? Here is a picture of it, http://people.mn.mediaone.net/addss/plugport.jpg http://people.mn.mediaone.net/addss/unkport.jpg Also I noticed a small pigtail clip just hanging in the air that is coming from a small condenser looking thing mounted to the back of the coil, here is a pic of it, hope you can see it. http://people.mn.mediaone.net/addss/pigtail.jpg This pic shows the lower or closest port running off to the distributor and on the front the plugged up port http://people.mn.mediaone.net/addss/vacport1.jpg Where should this go? Amazing the car runs with all this stuff disconnected or mickey moused! In the service manual I can only find them torqueing down a different looking carb where they say to tighten all bolts first to 36 in. lbs. then finish tightening to 144 in. Lbs. Does this sound correct? - To Unsubscribe please visit www.chevelles.net/list.html To start a new topic, send mail to: [EMAIL PROTECTED]
RE: [Chevelle-List] Choke help
Replies to this message are sent to The Chevelle Mailing List Jeff, 7042210 indicates a '72 application but I don't know the specifics off the top of my head. It's possible that 1 vacuum port in question is manifold vacuum and the other is ported; hook a vacuum gauge to each with the engine running at idle and the throttle blades closed. If it's manifold vacuum you'll get a high reading and ported vacuum will give a very low reading. You can use either for your advance as they're nearly identical once the throttle blades open; use whichever your engine likes best. The torque specs sound good but I'm not sure about that pigtail thingy, though. ;^) Brad O. Ok, got the carb back and does it look nice. As far as the carb number, that is a little baffling to me as there are numbers all over the damn thing. Here are a couple possibilities, 42742 and 7042210QE 0872 If neither of these are the correct number, any hints where the carb number is located would be helpful. On the front of the carb there is a vacuum port that was blocked up with rubber hose and a screw in it. The guy at the carb shop suspected it went to the distributor but that is piped off the side. Any ideas on what is might be for? Here is a picture of it, http://people.mn.mediaone.net/addss/plugport.jpg http://people.mn.mediaone.net/addss/unkport.jpg Also I noticed a small pigtail clip just hanging in the air that is coming from a small condenser looking thing mounted to the back of the coil, here is a pic of it, hope you can see it. http://people.mn.mediaone.net/addss/pigtail.jpg This pic shows the lower or closest port running off to the distributor and on the front the plugged up port http://people.mn.mediaone.net/addss/vacport1.jpg Where should this go? Amazing the car runs with all this stuff disconnected or mickey moused! In the service manual I can only find them torqueing down a different looking carb where they say to tighten all bolts first to 36 in. lbs. then finish tightening to 144 in. Lbs. Does this sound correct? - To Unsubscribe please visit www.chevelles.net/list.html To start a new topic, send mail to: [EMAIL PROTECTED]
Re: [Chevelle-List] Choke help
Replies to this message are sent to The Chevelle Mailing List pigtial noise suppresor for radio interferance Rob Means be good,if not,be good at it [EMAIL PROTECTED] - Original Message - From: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Tuesday, February 19, 2002 1:11 PM Subject: RE: [Chevelle-List] Choke help Replies to this message are sent to The Chevelle Mailing List Jeff, 7042210 indicates a '72 application but I don't know the specifics off the top of my head. It's possible that 1 vacuum port in question is manifold vacuum and the other is ported; hook a vacuum gauge to each with the engine running at idle and the throttle blades closed. If it's manifold vacuum you'll get a high reading and ported vacuum will give a very low reading. You can use either for your advance as they're nearly identical once the throttle blades open; use whichever your engine likes best. The torque specs sound good but I'm not sure about that pigtail thingy, though. ;^) Brad O. Ok, got the carb back and does it look nice. As far as the carb number, that is a little baffling to me as there are numbers all over the damn thing. Here are a couple possibilities, 42742 and 7042210QE 0872 If neither of these are the correct number, any hints where the carb number is located would be helpful. On the front of the carb there is a vacuum port that was blocked up with rubber hose and a screw in it. The guy at the carb shop suspected it went to the distributor but that is piped off the side. Any ideas on what is might be for? Here is a picture of it, http://people.mn.mediaone.net/addss/plugport.jpg http://people.mn.mediaone.net/addss/unkport.jpg Also I noticed a small pigtail clip just hanging in the air that is coming from a small condenser looking thing mounted to the back of the coil, here is a pic of it, hope you can see it. http://people.mn.mediaone.net/addss/pigtail.jpg This pic shows the lower or closest port running off to the distributor and on the front the plugged up port http://people.mn.mediaone.net/addss/vacport1.jpg Where should this go? Amazing the car runs with all this stuff disconnected or mickey moused! In the service manual I can only find them torqueing down a different looking carb where they say to tighten all bolts first to 36 in. lbs. then finish tightening to 144 in. Lbs. Does this sound correct? - To Unsubscribe please visit www.chevelles.net/list.html To start a new topic, send mail to: [EMAIL PROTECTED] - To Unsubscribe please visit www.chevelles.net/list.html To start a new topic, send mail to: [EMAIL PROTECTED]
Re: [Chevelle-List] Choke help
Replies to this message are sent to The Chevelle Mailing List Jeff, you're gonna love me for this... ;^) 7042210 is the correct Q-Jet for a '72 Chevy/GMC half- ton with a 350 CID V-8 and automatic transmission, and set up for federal (non-CA) emissions standards. Correct carb for your '71 454/4spd is 7041201, but if you're more concerned about functionality the Q-Jet you have can be made to work. Good luck! Brad If the weber site is always correct, it looks like I do not have the original carb. *sigh* -- Jeff Fischer Lake Elmo, MN '71 Chevelle SS, 454, 4 spd, matching numbers - To Unsubscribe please visit www.chevelles.net/list.html To start a new topic, send mail to: [EMAIL PROTECTED]
Re: [Chevelle-List] Choke help
Replies to this message are sent to The Chevelle Mailing List Jeff I just put a new Q-jet and choke assembly on the Malibu and the hole you have it in is the correct one .the other hole on mine is for linkage that is used by the vacuum break diaphragm spring , your vacuum break is set up differently than mine but the choke linkage is the same. Mel 67 Malibu SS - Original Message - From: Jeff Fischer [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, February 14, 2002 12:29 PM Subject: [Chevelle-List] Choke help Replies to this message are sent to The Chevelle Mailing List Since the temps here in Minnesota have risen to almost 50° and I can't snowmobile, thought I would play a little with the Chevelle. Took the Q-Jet off and took in to have cleaned and rebuilt and noticed that the rod that goes from the choke coiled spring on the manifold to the carb was off and laying on top of the engine. Looked in the Service manual and can't see a clear picture of where exactly this rod attaches to the side of the carb. There are two possibilities. I have posted pictures of the choke here http://people.mn.mediaone.net/addss/carb1.jpg http://people.mn.mediaone.net/addss/carb2.jpg Also the pictures of this coiled choke spring look different in the book and I am wondering if I have the stock choke coil and carb? In the pictures you will see that I hung the top of the rod in the closest hole but there is another hole just to the right. Which one? Also would appreciate steps for setting/adjusting the choke so I can get it right when the carb comes back in a few days. Thanks much for the help. -- Jeff Fischer Lake Elmo, MN '71 Chevelle SS, 454, 4 spd, matching numbers (In process of restoration when spring gets here) :) http://people.mn.mediaone.net/addss/chevelle.html - To Unsubscribe please visit www.chevelles.net/list.html To start a new topic, send mail to: [EMAIL PROTECTED] - To Unsubscribe please visit www.chevelles.net/list.html To start a new topic, send mail to: [EMAIL PROTECTED]
