I Give Up 2x4's aint worth it.

[71RR]

Guys, I have read, and do agree, that max wedges are made to go full throttle, and anything less is spit and sputter. I want to be able to cruise around town and this Belv just wants to hammer down. If I get ready to sell her I could put her back as she is now, but for the time I will own her, just for show and go, I am thinking of a high rise single 850 cfm or so. She has 2 600 cfms now. Would a 2-4 manifold inline make a difference or are 2-4's hard to tame? Thanks for reading, and any help or ideas.

 

[moparsteve636]

An inline 2x4 set up will work fine for you!Use 2 eldebrocks or the original AFBs.They are a little more involved tuning wise,Normally you won't have to mess with them for street use!

 

[lewtot184]

try an edelbrock ch28. dual plane high rise design. they will actually flow more air than a factory cross ram and your afb's will bolt up. should have good driveability and good low and mid-range torque.

 

[71RR]

I just talked to a mopar master who just told me the same thing. He said that edelbrock made a dual plane that just ran the 2 bbls of one carb until you wanted to go full out. The progressive linkage available from edelbrock or where would I look for what you have in the pic? Thanks for the help, sure am looking to enjoy a drive in her without sounding like I am wanting to race everyone. Im just trying to stay running. Thanks again.

 

[Cranky]

I know of several tunnel rams on the street that work great.....but if you don't have room under your hood......

 

[lewtot184]

the manifold, carbs, and progressive linkage connecting the carbs in the picture are edelbrock. the spring brackets, throttle cable bracket, coil mount, and kickdown rod i fabricated to use on my 65 coronet. i removed some metal from around the heat crossover.

 

[coloradodave]

the manifold, carbs, and progressive linkage connecting the carbs in the picture are edelbrock. the spring brackets, throttle cable bracket, coil mount, and kickdown rod i fabricated to use on my 65 coronet. i removed some metal from around the heat crossover.

71RR- You might want to have a sharp carb guy or racer that knows his/her stuff check out your set-up. I run a 440 with max wedge heads and crossram (Edelbrock 600 cfm AFBs) on the street without any problems, other than an affinity for gas stations (it never has seen one it didn't want to make friends with). My compression ratio is 10:1 in order to run pump gas (91 octane in CA). Good luck which ever way you go.

 

[71RR]

I dont mind stopping at all gas stations. I just want to know that I will get there without dying. And, lewtot, great pics. I will visit them often as I set my 64 Belv up.

 

[MoparMikey]

the manifold, carbs, and progressive linkage connecting the carbs in the picture are edelbrock. the spring brackets, throttle cable bracket, coil mount, and kickdown rod i fabricated to use on my 65 coronet. i removed some metal from around the heat crossover.

Any problem with idle since both carbs have an idle circuit?

 

[FatJack]

Have a problem somewhere, possibly a vacuum leak?? Should idle and run low rpm's fine.
Have you checked the timing lately?

 

[lewtot184]

I dont mind stopping at all gas stations. I just want to know that I will get there without dying. And, lewtot, great pics. I will visit them often as I set my 64 Belv up.

you don't state what cam your using. hot hydraulics can be a real pain for street use.

 

[lewtot184]

Any problem with idle since both carbs have an idle circuit?

with adjustable idle circuts it should be a plus. in fairness here i haven't run this set-up pictured on my dodge but know people who have with no complaints. i'm currently running a 6-pak and love driving on the small primaries with two bigguns sitting on the end of the dual plane. the ch28 should be very simple to tune, much easier than a 6-pak or crossram. afb carbs are very dependable.

 

[Hemirunner]

Put a wide band in it and then you'll know when and where it's doing what. It's a whole lot easier to tune once you do that. I run two 800's on a 2x4 on a big hemi and it drives very nice.

 

[fugly]

there is no reason the crossram should not drive well properly jetted and timed- check for vac leaks first, but it is likely lean and or has the wrong metering rod springs.....depending on the cam timing curve can be critical

 

[wvmarv]

Guys, I have read, and do agree, that max wedges are made to go full throttle, and anything less is spit and sputter. I want to be able to cruise around town and this Belv just wants to hammer down. If I get ready to sell her I could put her back as she is now, but for the time I will own her, just for show and go, I am thinking of a high rise single 850 cfm or so. She has 2 600 cfms now. Would a 2-4 manifold inline make a difference or are 2-4's hard to tame? Thanks for reading, and any help or ideas.

Can you give us some info about how exactly is it running? Is it stumbling on acceleration? Not idling properly or what? You should be able to run the set-up you have on the street without any problems. Got any picks? Would be nice to see what you have. I had a dual quad set-up on my 440, 2-600cfm Eddies and it ran fine. Had them jetted for fuel economy and it still ran great.
View attachment 56694

View attachment 56695

 

[rumblefish360]

I have run a 2X4 on a 360. The tuning issue is best solved with a wide band 02 meter. However, if you start without one, you'll need to take the time and tune it. This could take a bit of time depending on your skill level. For me, it was a few hours to get it pretty good where as the plugs were not fouling out, came out very light brown after wide open throttle passes.

The 2 idle circuits were not so hard to deal with. I simply started with the rear carb as the main carb and moved to the front carb once I was happy with the way it would idle and move about. I think you'll find very lean idle settings to your advantage during set up. Do realize that once your (rear) primary carb goes beyond a certain point that the (Front) secondary carb kicks in and can level out a lean primary carb. Or lean the whole thing out. Start rich, go lean.
It's all in the jetting. Take your time.

The front carb should be closed unless you find a need to have it working on an idle setting with the rear carb. I did not and my cam is a solid cam @ 248* @ .050.

My carbs are 2 Edelbrock 600's with the same linkage as pictured above. Fuel line was also from Edelbrock as well as the air cleaner.

 

[71RR]

Bought the car completely done. I dont know what is in it, but I had to index the plugs just to keep the pistons from closing the grounding strap on the plugs. I think that for what ever is in her, I have a good chance of helping the conditions by the edelbrock and putting the 2 - 4s inline. Heck, I may have a blown intake gasket and will find that during dissassembly. Who knows.

 

[71RR]

WV, You have the settup I am going to go with. The max wedge was built with the cross ram 4s. I think this will help me a lot. I just sold a 71 RR like yours. Sure turned heads.

 

[383man]

I run the Indy dual plane intake with an 850 DP and the driveability is great. Low speed or high speed it responds great. I actually want to go with 2 fours later when I can afford it but this setup does work very good. Ron

 

[lewtot184]

71rr, make sure you have standard port heads to match up with the inline manifold. the spark plugs hitting the pistons is disturbing. i'd do some more investigating with that.