Best carb for 383

[dodge freak 2]

Your going to hate this but the Performer is not so great for a 360. First it has small ports like for the 273-318 motors and 2nd the base is wide for the TQ's. Your 360 intake would make as much power many more if its a non egr.

I let others say what others might be good, I found a RPM intake on E-bay which is going on soon but I have 3.91 gears--and bad gas mileage--so I am not too worry about off idle power.

Yeah, find out the gears, a quickly way is turning the drive shaft-back wheels off the ground--and see in 1 turn of the drive shaft how many times the tires turn. If its 3 times, you have a 3.00 gear--most likely a 3.08.

3.55 are a great gear for power and some freeway driving  but with gas so high and going higher it seems maybe 3.23 would be better, if you can find them. Rear end work is not cheap. A new posi and gears will cost $700-$800 last I knew, might be more now.   

[pkhanc]

Hey Dodge Freak 2.  Thanks for the input.  I have a 383 in mine, not a 360.  The Performer will work well for it.

[dodge freak 2]

Oh wow, here I am thinking its a 360....


Then yeah, 750 would be good, the gears would be the same

[Chryco Psycho]

I am still sticking with my first choice the DP Holley 750 HP street

[Oldschool]

   Same here.....       

[FM3V6M]

My Cuda build has a 383 and I am going with a Speed Demon 750 DP, Holley's are a pain.  It's gonna scream with the Engle K58 cam, 4spd and 3:55's.  If I were you I'd look at a Demon carb, much easier to tune and more reliable than a Holley. JMHO.

[MEK-Dangerfield]

My Cuda build has a 383 and I am going with a Speed Demon 750 DP, Holley's are a pain.  It's gonna scream with the Engle K58 cam, 4spd and 3:55's.  If I were you I'd look at a Demon carb, much easier to tune and more reliable than a Holley. JMHO.

Interesting. 


  I know of nobody that would go Demon over Holley. This is just stuff I heard from guys that know alot more than I.  Holley's are hard to tune and are unreliable?? Please explain.  If I can do it, anyone can. 


  Mike

[dodge freak 2]

I too think theres nothing wrong with a holley. As for them not "holding a tune". BS, my car is now in the garage for 1 to 3 weeks, goes out when the streets are dry and salt free, could be 25 degress outside or 80 degress. Motor will run just fine. The idle screws might need to be adjust, big deal, 1 min job. Jetting might not be prefect but the motor will run fine at all speeds.

 Tuners who hate a type of carb have other problems, maybe  its their set up, a weak ignition system, too big of a cam for a low compression motor, wrong type of intake or one that leaks. Sure some carbs are machined bad but that could be any brand.

DP are the best, if they are set up right, have enough gearing and are the right size. Needs a good strong spark to fire all that A/F that a DP will ram in the motor.

Thats why when somebody seems like not a top notch tuner and its for the street, I say get a vacuum secondary carb. They are more forgiving for street gears and a weak ignition system.

The type, Demon or Holley, I am sure a good tuner can get both types to run perfect. A 750 Demon might make a bit more power than a 750 Holley but thats only because how they are rated. Seems like a 750 Demon is bigger than a 750 Holley 

[pkhanc]

Ok, my mind is made up.  Going with the Edlebrock Dual Plane Performer and the Holley DP 750 HP.  This is going on a 383 that is in a 74 Challenger.  It has a Torqflite 3 speed automatic with a B & M shift kit, has a larger than stop bumpstick, and a .030 over bore.  Although I have never been really one to do it just for the numbers, I'm going to prove to myself what the car does.  I'm going to take it and have it dyno'd in teh present condition.  (same as described in earlier posts).  Then find out about the rear end as Dodge Freak 2 planted this liitle see of wonderment about whether or not it is a 3:23.  So, after I get all of this information, I'll get the Performer and Holley carb on there, and do this all over again.  I'll try to remember to post the numbers when I am done.  Thanks to everyone who commented wth their thoughts.

Best,

Perry

[dodge freak 2]

Don't forget about E-bay, Holley is great. My carb came with a bent secondary pump post from the base plate. Called Holley # and they said pack it back up, UPS will pick it up and we ship you out a BRAND new carb...they did!

[pkhanc]

Ok, going back to the carb issues on my '74 Challenger with the 383, I purchased a Holley 3310S (4160) 750 double pumper.  It is brand new, but got a very good deal on it.  I also got another good deal with a new Weiand dual plane manifold.  I have no problem installing either of them, but are there any good tips on initial settings for the carb?  Will this run out of the box?  Neither the carburetor or the manifold have ever been installed on a motor, and the carburetor is NIB, but has been opened for inspection.  Also, does anyone have torque sequence and settings for an aluminum manifold?  I hope to get 'er up and running in the next few weeks.  Gotta drive!!!!

[dodge freak 2]

The 3310 is not a double pumper. Thats a vacuum secondary carb with no metering block for the secondary-most likely-but its cheap to get one.

As for torque sequence and specs. Follow the stock pattern but not no 40 lbs or so. Like 25 lbs is good but I never use a torque wench. I do for heads, caps, etc but not intakes. I like using a short open end wench like 3-4 inchs long and get it good and tight. You need to go slow and go in steps. Like tighten all to  5 lbs , then 15, then 20, etc but I just guess. once you do all you find the firsts bolts are loose, so it takes time.

You can spilt the gasket by over torquing the blots-thus the reason I like using a short wench.

[Chryco Psycho]

recheck the intake bolts often , the different expansion rates of the metals will cause them to loosen , set he floats as soon as you get it running , I usually set them too low before startign & raise them as this is the easier way to get them set right , set the mixtures 1.5 turn out from the bottom to atrt & adjust when warm most other adjustment need engine data to fix such as idle vacuum in gear

[Kapteenikosmos]

Anyone ever used the dreaded chebby carb  , aka Rochester, on mopars? I have one laying on the ground at home and I'm thinking that I might try it on my 383. My friend is a chebby guy and according to his opinion the rochester is one of the best cruising carbs available. Not the best from off the line, but should be pretty good overall.

[dodge freak 2]

I hear very good things about them. Was thinking of getting one but they seem not too easy or cheap to work on. It was GM answer to the TQ, its made by Carter.

Its funny how because GM used it in my cars and trucks, the Ford and Mopar guys stay away from it. The darn motor could care less the name of the carb, so long as the A/F is right.

Heres a link to more talk about QJ.....

http://speedtalk.com/forum/viewtopic.php?t=8854