warped quadrajet
Hey there,
I sent Lars an email about my carb yesterday before i signed up, he hasn't replyed yet and it's no rush but after reading almost all of his post it's sounding like he doesn't mess with them much anymore. So i thought i would go ahead and post my request to continue the quest of getting my carb fixed up. the fuel bowl and air horn are warped other than that it's perfect as far as i can tell. Is there a way to fix this myself? does the "barker un-warping tool" work has anyone tried using it? Are there other proper ways to fix this? any insight would be great and any recommendations will be investigated. Thanks, Shelby |
The Rochester Qjet book says to scrap it if bent...
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How 'warped' is it? When you set one of the bowl splitlines on a flat surface, how much does it rock? You can use some feeler gauges to fit in the largest gap to steady it; that will tell you have much flatness error is present.
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Call Cliff...I spoke with him a while back and he mentioned there are ways to correct warping. I agree though that it most likely depends on how badly it is warped to start with that will determine the outcome. Slight warps are fixable, especially in the horn. I've also heard that thicker gaskets can be used between the horn and the casting to compensate for slight warping.
http://www.cliffshighperformance.com/ best of luck, Steve |
Originally Posted by retsamtev
(Post 1573197281)
Hey there,
I sent Lars an email about my carb yesterday before i signed up, he hasn't replyed yet and it's no rush but after reading almost all of his post it's sounding like he doesn't mess with them much anymore. So i thought i would go ahead and post my request to continue the quest of getting my carb fixed up. the fuel bowl and air horn are warped other than that it's perfect as far as i can tell. Is there a way to fix this myself? does the "barker un-warping tool" work has anyone tried using it? Are there other proper ways to fix this? any insight would be great and any recommendations will be investigated. Thanks, Shelby |
Originally Posted by Wuttin
(Post 1573201590)
Call Cliff...I spoke with him a while back and he mentioned there are ways to correct warping. I agree though that it most likely depends on how badly it is warped to start with that will determine the outcome. Slight warps are fixable, especially in the horn. I've also heard that thicker gaskets can be used between the horn and the casting to compensate for slight warping.
http://www.cliffshighperformance.com/ best of luck, Steve Shelby |
If they are that far off, they were probably that way from the factory. Those parts are die-cast. If they are not cooled properly in the mold, the metal will still be a bit soft and handling of the part can cause it to sag/warp. Ten thousandths of an inch [.010"] out-of-flat can be sanded flat by placing a sheet of sandpaper on a very flat surface (laminated counter top, etc.) and working the surface over the paper. But, it's a real question whether a part with 1/16" error will be serviceable with that much material removed....and it has to be flat on the top and bottom. It sure doesn't hurt to try it, other than the loss of some assembly time. You may still end up throwing that piece away...but, you might get lucky.
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Cliff says he should be able to straighten it out.
has anyone used Cliff to get their q-jet unwarped?....what was your results? Thanks, Shelby |
Have not used Cliff to "unwarp" a carb, but for other services and tuning he is super. Look at his web site cliffshighperformanc.com
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Quadrajet Unwarping Service
Hey forget about it.... Quardajetcaburetors.com can unwarp your Qjet for 100 bucks and their process claim not to warp again. I guess their unwarping jig and heat tempering process make the casting tougher.
Worked for me !!!!! Even had their stainless steel w/7% bushing install for a 100 bucks. Saved me 200.... Fast service and great price !!!!! |
Originally Posted by Mr-Q-Jet
(Post 1587298365)
Hey forget about it.... Quardajetcaburetors.com can unwarp your Qjet for 100 bucks and their process claim not to warp again. I guess their unwarping jig and heat tempering process make the casting tougher.
Worked for me !!!!! Even had their stainless steel w/7% bushing install for a 100 bucks. Saved me 200.... Fast service and great price !!!!! |
i vote for cliffs, if he says he can do it you can trust him he can.:thumbs:
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No harm, No foul
3 Attachment(s)
If you would have gone to my site you would have seen we are a very, very small shop of one. We wont get rich on 10 carbs a month but we will be able to eat. In this thread I feel I must defend the bogus info surrounding the warpage of a Qjet by educating those who seek this knowledge. Dennis Barker is the man who invented the unwarping process along with his formally manufactured Quadrajet unwarping tool some 43 years ago. Dennis was a minor contributor to Cliff's latest book and did not receive any acknowledgement for his efforts. That book is loaded with good info but too technical for the average guy who needs a step-by-step book. Cliff and Dennis have from time to time over the decades sought out each other’s thoughts regarding Qjet issues. We gave Cliff one of our unwarping tools but we only heard from him a couple of times afterwards. Nothing against Cliff. We were under the impression that Cliff was retiring in '08, maybe he hasn't. Our understanding was a Cliff is proponent of flat filing as with others.... WRONG !!! When we debuted our tool at SEMA in '05 2 senior Quadrajet engineers told us they knew the carbs would warp but as you might guess management in that era builds cars to sell, not to last. The engineers confirmed that if the carb bodies could have been heat treated they would have been very tough and NOT have warped ! The engineers laughed loudly when I asked about their thought on flat filing… Then gave us some technical reason why flat filing would turn your Qjet into scrap. We gave each a tool and a bunch of a stainless steel w/7% lead bushing kits. Later they called and said our tool was great!! Yeah, too bad they had to warp first. So the bottom line is that we are the only ones in the world with thee properly engineered unwarping tool. Ok so maybe your an owner of one of 100 we produced… We had no trouble selling them for 900 bucks !!
If you’re not unwarping your Qjet your not rebuilding it correctly… period !!! Yes our bushing are cheaper and vastly superior. Thanks for your time, |
Originally Posted by retsamtev
(Post 1573221435)
:thumbs:thanks for the link Steve i just sent an email to them asking about the warpage. I got the horn pretty straight but i don't know how to get the bowl straight, there are spots that are as much as 1/16" off.
Shelby |
nothing against your service, you are a new name around here. people on these forums are familiar with Lars and Cliffs, its not a slight on your service.
there are many people that rebuild quadrajets and do a lousy job it will take some time but you should be fine once a few people use your service. most of the issues here surround performance enhancements to make the engine run right , as emissions tuning ruined these cars performance, if that isn't something you offer your going to limit your business. I've worked on quadrajets and have had luck making them work well. the best description I've heard is they are a gadget. profanity would be required for what i think of them. :lol: i wish you luck i hope you do well. keep posting and the word will spread. btw i did look at your website. |
i sent my carb to Cliff shortly after my last post and he fixed it.....it's bad ass now. it has a manual choke and i dont even have to touch the throttle and it will start after months of sitting. as soon as gas touches the carb it starts. there was a bunch of stuff wrong supposedly, it was 500 to fix it i was pissed but i don"t care now....it's bad ass.
shelby |
Just because someone 'claims' to have talked to some Rochester engineers (how many are still alive?) and they "laughed at the thought of 'machine' flattening some light warping", doesn't mean that it's true.
If someone were to heat a die-cast zinc part hot enough to "bend" it straight, what do you think happens to the flat surface on the bottom of the part? Well, of course, it "bends" to compensate for the part shape change. So, the warping is just transferred to another surface on the part. Under .020" of warping: straighten it up. Over .020" of warping: scrap and replace the part... OR try this new "de-warping" service, if you want. |
Originally Posted by 7T1vette
(Post 1587302739)
Just because someone 'claims' to have talked to some Rochester engineers (how many are still alive?) and they "laughed at the thought of 'machine' flattening some light warping", doesn't mean that it's true.
If someone were to heat a die-cast zinc part hot enough to "bend" it straight, what do you think happens to the flat surface on the bottom of the part? Well, of course, it "bends" to compensate for the part shape change. So, the warping is just transferred to another surface on the part. Under .020" of warping: straighten it up. Over .020" of warping: scrap and replace the part... OR try this new "de-warping" service, if you want. |
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