Post Your Max Wedge Combos

[33 IMP]

I went into my photos in my phone, to get a date on the pics i took for that thread. Then i looked for that date (or close) in my old content.

 

[miller]

On the two 600cfm Eddys, I put on mine, I had to cut part of the throttle arm off. It would hit the manifold, not letting it to get WOT. No big deal.

 

[Frustration]

Still struggling with this. Curious what plugs you're running Jim? We run Autolite R72's. I've been told to go to a hotter plug. I run Autolite 84's in my street car. Any suggestions are appreciated.

 

[NSS Guy]

I have Indy little ez heads and run autolite ar3911.
What trouble are you having?

 

[dvw]

As for the metering rods. Move the top cover slightly sideways and tighten. In gear the rods should stay down. If they're up or dancing it needs lighter springs. Do not remove the rods it'll be pig rich. I like 11/32" float level. The old Mopar bible jetting chart will be close. But the smallest jet needs to be fabbed by soldering it up and drilling with a correct drill. The air doors can be lightened to quicken the secondaries. It is a time consuming trial and error process. As stated 6psi max fuel pressure. The idle speed screws shouldn't be open more than 1 1/2 turns.
Doug

 

[Frustration]

Little EZ heads use the small, 5/8" plugs, correct? I have steel MW heads on our's. I recently put the Edy carbs on and transferred my 107 jets and rods from the Carters, as well as .089 (throttle side) and .082 on the other. I am familiar with the way Doug advised to check the springs, and i have checked that. For some reason, the fuel pressure went from 5.5-6psi up to 8 psi. Not sure what happened, but I ordered a regulator to fix it. We run a small Carter electric pump up to a Carter mechanical pump with no regulator currently. Had this setup for 20 years with no issues. I had to set the floats on the Edi's, and the Mopar Engine Bible told me .281. That's where they are now. I didn't measure where they were before, but I'm guessing they were near the .343 Doug advised. I must have fouled the plugs with the incorrect float level, and now I have new plugs (AR72) and all the mods described above. Truthfully my original combo wasn't too far off of this when I started. Once the regulator is here and the new needle and seats, I'll take it to a Test and Tune to see if it improves.

As for the spark plugs, I see that Autolite AR72's are over $9 each!! WOW! Looks like I need to make a change, and not sure where to go from here with the heat level.

 

[NSS Guy]

I buy the autolite racing plugs from advance auto parts, usually around $4 per plug.

 

[Mike Gaines]

I use AL3923 (not racing plugs) at around 1.80 each. Car ran [email protected] with those plugs. I run them for at least 100 runs with my MSD Ignition setup.
I think most guys would agree with me that spark plugs last almost forever with the MSD setup and if the car is jetted ok.

 

[Frustration]

I thought I would update this thread. I feel like the combo is back where it should be. Found that the float level was way too high. Also the air fuel was at least a half turn too rich on each screw. These Eddy 750 Carbs were modified by a respectable shop. They dyno all the carbs before shipping. I assumed the air-fuel and floats would be correct. Also, I had to install a regulator after the mechanical pump due to the fuel pressure rising to 8psi. Not sure why that would happen. This past weekend, I took the day off on Friday to test at Maple Grove. Went a best of 11.06 in the heat. Saturday we raced at the United Nostalgia Stock and Super Stock race at Cecil. Car ran flawlessly. Went three rounds with a best of 10.94. Our all-time best is 10.81. I feel we're back on track...finally.

The final setup was .107 jets in all primary holes. .089 throttle side secondary and .082 opposite side. 7347 rods in primaries. Softest springs available. Thank you again for all the help from the members. Note to self...always check float and air-fuel first!

 

[NSS Guy]

Glad to hear you got it sorted out. Jetting looks good, the float adj. will move some, so something to check every now and then.

 

[dvw]

Glad you ran well. You can run the floats way up as long as the fuel pressure doesn't exceed 6 psi. It actually works very well.
Doug

 

[HEMI-ITIS]

Glad you ran well. You can run the floats way up as long as the fuel pressure doesn't exceed 6 psi. It actually works very well.
Doug

Are those fuel lines and single feed enough to feed the hungry animal? Been many moons since I had a Maxie!

 

[Frustration]

Is those fuel lines and single feed enough to feed the hungry animal? Been many moons since I had a Maxie!

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Lots of folks asked me that question Al. I think it is as I have 6 psi all the way through the finish line. A buddy said pressure doesn't equal volume. I plan to replace the filter with a high-flow job. I also need to replace some of the fittings with high-flow units, rather than the plumbing fittings I used from the hardware store. More to come. At least it's driveable and raceable!

 

[dvw]

One line feeds plenty. Way more area in the line than the 2 needle/seat assy's. Take a look at S/S AH carbs. Though they're Holley's they are single inlet
Doug

 

[Frustration]

One line feeds plenty. Way more area in the line than the 2 needle/seat assy's. Take a look at S/S AH carbs. Though they're Holley's they are single inlet
Doug

Good point Doug. I think the tuning will be done with shoe polish for the rest of the season. Good feeling compared to where we were mid-summer.

 

[khryslerkid]

Glad you ran well. You can run the floats way up as long as the fuel pressure doesn't exceed 6 psi. It actually works very well.
Doug

On my inline Eddie 600's my fuel pressure has been 8 psi with the M6903 Carter pump. I heard that the 600's might have the heavier needle and seats. Is there such a thing? I haven't had any problem with richness or flooding over.

 

[biomedtechguy]

my fuel pressure has been 8 psi with the M6903 Carter pump.

My understanding is that fuel pump delivers "stock pressure" but 120 GPH which is about double the volume of the stock fuel pump. Bob Karakashian aka "Mr 6 pack" runs it on his F.A.S.T. A-12 Super Bee, so do a lot of other 6bbl guys.
I installed one on my 70 V-code Roadrunner/71 440 engine w/aluminum 6bbl intake, cam, headers, etc (see signature). It runs around 6-7 psi. if I recall correctly.
You MaxWedge guys have one of THE most legendary engines in the history of muscle cars! I am ALWAYS impressed by some of the things that Ma Mopar did in the design of MaxWedge engines, the intake manifolds, exhaust manifolds, heads, etc. Some of THE FINEST old school muscle motors!
The sheet metal those engines are wrapped in is pretty cool looking too!

 

[dvw]

On my inline Eddie 600's my fuel pressure has been 8 psi with the M6903 Carter pump. I heard that the 600's might have the heavier needle and seats. Is there such a thing? I haven't had any problem with richness or flooding over.
View attachment 839755

No need for 8 psi. Extra pressure just aerates the fuel bowl. There are different diameter orifice seats, not heavier. I have run 9.0@150 on 6 psi with Eddy carbs. Its also possible the your gauge is inaccurate.
Doug

 

[biomedtechguy]

Extra pressure just aerates the fuel bowl.

My limited understanding is that greater than recommended or greater than stock fuel pressure on carburetors overwhelms the needle valve and floods the carb, or floods the fuel bowl.
I've never heard of aerating a fuel bowl.
Can you elaborate?

 

[khryslerkid]

Its also possible the your gauge is inaccurate.

That's what I was thinking about the Summit guage. The M6903 is supposed to be rated at 6 lbs to 7.5 lbs.