Atlas

Hello to all I'm new to this site and find it quite informative. I ran mopars years ago then ran chevy's and now i'm back to mopar anyway can a set of 1.6 rockers be used on a stock 67 440 Chrysler motor. Stock springs. Thanks for any info Atlas

RacerHog

Yes..... I'm a Harland Sharp Guy..... Go Smith Brothers push rods if you need them...
If you need some extra help.... Call good old Big Mike....http://www.mrlperformance.com/
Welcome back to the Mopar Family....
http://www.harlandsharp.com/bb_mopar.htm

moe7404

the only help i can give is this. my 1967 coronet factory service manual. shows the 383 has lift .425" intake, ,435" ext. the 440 .450" intake, .458" ext. with duration for the 440 at 268 intake , 284 ext BUT i think they all so had a mild 440 that might have had a smaller cam. but i have no proof. cause i had a new 1967 300 with a mild 440. but of course a dodge IS a diff car.

Atlas

Thanks for the info. I was told the stock stamped rockers had only a 4.5 ratio which seems very weak for even a modest amount of performance. I enjoy driving this car so much but a little more performance would be nice. Any recommendations on carb size? Car is a cruiser not a racer and halfway decent mileage is a factor also. Leaning towards the new street demon.

moe7404

the AFB carb that came on a 1967 440 dodge is THE best carb for that engine. unless its a race engine. that carb is diff than reg AFB but has an air valve above the secondary plates, that is tuned very very good. but set the float level at 5/16". stock setting is 7/32. you should not need to adjust any settings, other than float level. the lean idle came in 1968 on the AVS carb. but is easy to adjust it. but here is the info i have gained over the years. its for info only cause your stock carb needs only float level adjusted.
AFB jetting long ver.

edelbrock does NOT know how to jet a carb. 1. hint change only jets. or rods at a time if you change both you cant guess what the change was. 2. hint change jets and rod to more like the size of OEM carter carbs. 3. if the jet does not come out easy dont force, that will strip the jet out. 4. hint there is a trick to get difficult jets out. take it all apart, get a small torch on the jet, when the color of the flame changes hit it with water. let it cool should work. i have done this only once, but it did work. But dont put the jet hard, just very lite tightness.

Title: AFB and edelbrock carb / the short verson.

setting an AFB carb takes time. make only small changes. and give it time, dont make changes in an hour or two. drive it in different ways over a day or two. on AFBs or AVSs change only the jet OR rod at one time. and start with the jets. a .003" change can be felt if you try. dont forget .003" on a .060" jet is less change than .003" on a.100" jet. Then start changing the rod. A little is a LOT. i do have a computer program to cal any combo of changes. but it is lost in some main frame of my sons. Sometimes you can set the float level to 5/16”. the stock setting is 7/32. if at 5/16” at idle the fuel runs out of the main discharge nozzle reset to the stock setting. NOTE: do NOT change jets AND rods at the same time. Do not put the jets in tight, just snug is fine.
BUT THIS WILL.
Here is program to rejet ANY jet / rod combo
*http://clarkehackworth.com/files/JetsAndRods.html

Coronet 500

Have a 625 street demon on the truck for 1 1/2 yrs and like it very much.

Atlas

Car has a 750 Edelbrock on it now. The car is sometimes hard to start when it sets for a few days but engine always runs very smooth although seems sluggish and not very crisp. I will look into a rejet but carb seems too big. Thanks again for all the info

Atlas

To Coronet 500, What year is your truck and do you have a Coronet? I had a1966 4speed 383 back in 68 traded it for a new roadrunner in 69. I miss those cars.

moe7404

i might be repeating my self. if your mopar late 60s big block is close to stock. use the stock chrysler CARTER, carb. a non-start after setting might be fixed with an electric fuel pump next to the tank. with what i call an over ride switch. to fill the carb with fuel before you start it. save on starter, battery, ect. and a safety oil pressure shut off.

RacerHog

I like the Street Avenger 650 Vac,,,,....

Coronet 500

Truck is a 1992 with '88 318. Coronet is a 1970 and is in surgery right now. My son has a '72 Demon.

Atlas

The original carter had the pump go bad and I couldn't find another also the air horn is much smaller limiting air cleaner options. I also installed an edelbrock performer intake.

Atlas

I will look into the street avenger

TVLynn

Unless you are going to a performance cam ? I would use the stock rockers !!!!

Atlas

Car does run well with stock rockers but why do you think stock rockers would be the better choice?

Coronet 500

Personally I would raise lift with a camshaft change and 1.5 rockers.

If your serious about the 1.6's don't forget your valve springs they may not be up to the task.

I would only look at 1.6 above .600" of lift, if required to get to desired lift.

TVLynn

stock are fool proof ! no maintenance..

Atlas

Good point on the no maintenance thing