Eric Hysteric
Hildesheim
Full Member
Joined: 09/19/2017
View Profile
 Offline
|
You are the best guys! Thank you very much! Where can i buy a carburetor Quadrajet/Edeblbrock/Carter which is easy to replace the original Thermoquad? I live in Germany and this kind of modifications are not so easy to realize. I am very glad about your help
'79 Dodge Sportsman 5.9 LA 360 TEC Campmate
|
Griff in Fairbanks
AK
Senior Member
Joined: 04/21/2005
View Profile
Offline
|
Eric Hysteric wrote:You are the best guys! Thank you very much! Where can i buy a carburetor Quadrajet/Edeblbrock/Carter which is easy to replace the original Thermoquad? I live in Germany and this kind of modifications are not so easy to realize. I am very glad about your help
I got two Carter AFBs off eBay around a decade ago. One for myself and the other for my daughter's '59 Plymouth Savoy 383 cu. in. restomod project. I don't know what the junkyard situation is in Europe, but you can sometime find them there.
You may be able to find a used Edelbrock Performer on eBay. There's plenty of online sources, like Summit and Jegs, who sell new Edelbrocks and there's probably one or more 'brick and mortar' stores near you who sell them. (They're available and sold worldwide.)
You may need to work with, or at least ask, IMPCO about using something other than a Thermoquad.
I may be wrong but I thought all Thermoquads had black plastic float bowls. It's strange the installation instructions reference Thermoquads but rule out using many of them.
In any case, Leeann and VintageMopar probably know more about Thermoquads and Quadrajets than me. (Most of my experience has been with one- and two-barrel carburetors.)
1970 Explorer Class A on a 1969 Dodge M300 chassis with 318 cu. in. (split year)
1972 Executive Class A on a Dodge M375 chassis with 413 cu. in.
1973 Explorer Class A on a Dodge RM350 (R4) chassis with 318 engine & tranny from 1970 Explorer Class A
|
Eric Hysteric
Hildesheim
Full Member
Joined: 09/19/2017
View Profile
Offline
|
I think Edelbrock 650 AVS with electr. choke would work plug and play? Is it right?
Like this one?
|
j-d
Sunny Florida USA
Senior Member
Joined: 09/04/2003
View Profile
Good Sam RV Club Member
Offline
|
When James A. Ryder was kicked out of the Ryder (Family) Rental Truck business, he returned to the market himself as JARTran. Fleet was mostly Cube Vans and the majority of those were on Dodge chassis. There were three odd problems:
1. They weren't air conditioned, and for some reason that belt configuration liked to sling a belt. V-Belt and when one came off it kicked the rest off too
2. Pregnant Mufflers. Clogged up with rust flakes and cut exhaust flow to where the truck could barely move.
3. Inordinate number of them had Engine Fires. These traced to leaking ThermoQuads. For that reason, I'd advise finding something else that would fit and work.
I've had Carter AFB on a Chevy Impala, and a derivative called Weber on the Chevy engine in our boat. So for me, the AFB successors like Performer would be one of my first looks. Runs well and less risky. That, and less hunting in vintage stuff for parts...
If God's Your Co-Pilot Move Over, jd
2003 Jayco Escapade 31A on 2002 Ford E450 V10 4R100 218" WB
|
Eric Hysteric
Hildesheim
Full Member
Joined: 09/19/2017
View Profile
Offline
|
Thanks!
I found an Edelbrock 1406 600 cfm in Germany. I hope this would be a good choise. What do you think?
|
|
|
StingrayL82
Nampa, Idaho
Senior Member
Joined: 06/27/2017
View Profile
Offline
|
Eric Hysteric wrote:Thanks!
I found an Edelbrock 1406 600 cfm in Germany. I hope this would be a good choise. What do you think?
As long as it’s a spreadbore design, which the 1406 is, it will work. I’ve personally never had good luck with Edelbrock carburetors; I owned two and both leaked worse than a cracked ThermoQuad., so at a minimum rebuild it, if it’s used. If it’s new, make sure the housing bolts are snug.
On a completely unrelated topic, Eric, I lived in Deutschland for a few years, im Bad Aibling. My family came to the U.S. from the Palatinate in 1751.
To answer your question, Griff, all ThermoQuads had the phenolic bowl. I had heard about experimental ThermoQuads that had a metal bowl, but I think they’re unicorns. If they were real, there were probably only a couple made, and I’m sure they’ve long gone the way of the Dodo bird.
Fred
Retired Army Guy
2005 Monaco LaPalma 37PST
Workhorse W24 chassis
8.1L Vortec
Allison 2100 MH
Onyx Color Scheme
|
VintageMopar
Missouri
New Member
Joined: 09/14/2013
View Profile
Offline
|
The AFB had all 4 venturis like size of a quarter.
The quadrajet and Thermoquad are the same quarter size primaries but the secondary bores are 2 1/4 inches. They made adapter plates to change, but it is a performance hit from the aspiration aspect.
|
Eric Hysteric
Hildesheim
Full Member
Joined: 09/19/2017
View Profile
Offline
|
Do i need adapter plate for this Edelbrock 600 instead of Carter Thermoquad?
|
Griff in Fairbanks
AK
Senior Member
Joined: 04/21/2005
View Profile
Offline
|
Eric -
First and foremost, the IMPCO AA3-64 kit is a Thermoquad only adapter plate to be installed inside the carburetor. It is not used with any other carburetors and, as far as I can tell, there's not equivalent adapter for other carburetors. (i.e., the 300A can be installed on other carburetors without modifying the carburetor.)
Closer reading of the IMPCO Thermoquad installations instructions leads me to believe the AA3-64 closes off the Thermoquad's gasoline systems, turning everything into a single (propane only) fuel system. So, if you want a dual (gasoline and propane) fuel system, you need to replace the Thermoquad.
Also, general consensus seems to be replacing Thermoquads with something else, largely due problems with the phenolic (plastic) float bowl.
Here's an excellent thread, with lots of........e installing a used 300A on a Quadrajet. Read it thoroughly and carefully examine the pictures.
To repeat ... see if you can get the air cleaner in the picture you posted. (1) It's already adapted/modified for mounting a 300A. (2) It's a snorkel air cleaner, which I prefer. Snorkel air cleaners make it easier to install a custom cold air intake, which improves economy and performance. (I have an aftermarket dual snorkel air cleaner for MLP and will be installing twin cold air intakes in the grill.)
![[image]](https://img2.picload.org/image/dagpoogi/26613439_893267554169129_47476.jpg)
If you buy a used carburetor, definitely plan on rebuilding it or having someone rebuild it. Current best rebuild price in interior Alaska is $100USD plus parts, from one of the best carburetor rebuilders/specialists. So, plan on adding $150-250USD to the total cost of a used carburetor. If you rebuild it yourself, plan on an extra $50-100USD for the rebuild kit. (Make sure you get a rebuild kit with newer types of the seals ... old kits still on the shelf may have older type seals that 'modern' fuels destroy quickly.). Rebuilding a used carburetor before installation will save you the hassle of pulling it back off to have it rebuilt in the near future.
You really need to contact IMPCO's technical support. Those of us on this thread are really 'shooting in the dark' in trying to help you. There's some general things we can advise you on, like changing carburetors but you need to go to the source (IMPCO's technicians) for accurate detailed information and guidance.
BTW - IMPCO has a European headquarters in Delfgauw, The Netherlands.. Without looking at a map, I believe this is fairly close to you.
|
Griff in Fairbanks
AK
Senior Member
Joined: 04/21/2005
View Profile
Offline
|
VintageMopar wrote:The AFB had all 4 venturis like size of a quarter.
VintageMopar is correct. Carter AFBs have comparatively small secondaries, as well as Edelbrocks based on AFB design, molds, tooling, and so forth. (Edelbrock has evolved their designs, molds, and tooling over time so this is not true for all Edelbrock carburetors.)
Comparatively small secondaries means less performance under load and WOT. I'm well aware I may find the AFB's performance lacking and may need to swap to a 1406, Quadrajet, or similar carburetor with larger secondaries.
Aside: Carter AFBs figuratively suck because they literally suck less (air) than other carburetors suck.
I'm not going to mention this to my daughter because she doesn't realize the beast she's putting together with her '59 Savoy project. I had a '66 Dodge Polara with a 383 which used to scream. (83 mph in 30 mph zone less than a half city block from a stoplight.). So, I'm going to covertly encourage her to stay with the AFB. (I can foresee her needing new rear tires within a few months ... I did with the '66 Polara.)
The Edelbrock 1406 has larger secondaries, although I don't know if they're as big as a Quadrajet or Thermoquad.
Your Thermoquad is a spread bore (larger secondaries) so the intake manifold should also be a spread bore. Assuming the Thermoquad is OEM stock ... a previous owner may have replaced an AFB with the Thermoquad. In that case, your intake would be a square bore.
One way to tell is take off the air cleaner, open the secondaries butterfly valve, and look for a 'step' between the carburetor and intake manifold. Do this now because if you have a square bore intake, it's gonna throw a wrinkle in everything we've been talking about.
(A spread bore carburetor on a square bore intake manifold -- or vice versa -- means less than optimum performance.)
Here's a good article to read on carburetors. Bear in mind the article is listing likely mistakes rather than making recommendations.
|
|
|
