Domes in the 383??
Thats a tough little motor to beat. After 60 feet, the 440 better have a little something extra at the bottom of its knapsack, or its gonna fall behind.
The b motor should have been timed at 41~42*, and the 440 needs good degrees too.

What was the deck height on the 440?

The 440 picked up 1.5 MPH over the 383 at the big end. Timing on the 383 was at 40*. The 440 is at 38*. For what the 383 had in and on it, I think it ran pretty darn good. This whole combo, old and new, puts a new meaning to the term budget build.

I did a manifold dyno test several years back on a stroker 440 motor(484 C.I.) with a set of worn out stageIV heads stock 440 port size) we tried a Torker 11, Eddy Performer RPM, and a Mopar M1 single plane, same motor same day twenty minutes or so apart to make the changes. The Torker 11 was the worst, the RPM was better down low, below 5000 RPM and the average(3500 RPM to 6500 RPM at 100 RPM intervals)) HP and torque was real close to the same between the M1 and RPM. the single palne was better above 4500 RPM but that was a meduim weight(3500 LBS minus driver)street car so we left the RPM manifold on the motor Do you have access to another intake to try

Very little left to say after the above posts. Compression cost a little, shift points may need to be lower, manifold cost you some, and then the motor is corked up by the same flow as the 383 used. That in itself might be part of the issue. Did you try collecter extensions? Jet changes? I would jerk the heads and go with a steel .022 shim head gasket to get compression and quench back up there. At about .050, the help of quench starts to go away.
with a looser converter ,a better intake and a cam as big as the mopar .590, this deal should go mid elevens, even asd heavy as it is. Check cranking compression, try running the plug gaps tighter, pick away at every thing you can think of. The performance will come.

What tube size on the headers ? Also should have used the .021 steel shim instead of the .039 headgasket .

I'm guessing what has been mentioned...more cubes, means more fuel demand! I had a Holley blue pump that barely kept up with my 360 Magnum! Centrifugal force + add'l volume may be starving it by 1/2 track I'd bet...upgrade to a better pump and even 1/2" line maybe. Just my two cents....no change.

the 383 sounds like pretty swell piece?
timming at 40-41, ???!!!! wow if i did that push my valley tray plum out around the intake,
never over 36 run 32-34 shift point ?? 6200-6500 tops
440 shift 5800-6200
JMO ?

I use to run 12.00 along time ago in a 440 cuda.
If I remember correctly the car ran 113 to 114 mph. With your 111 mph you should be able to run at least 12.20's.
I ran the holley pump with the regulator I don't remember if it was blue or red but it was the bigger of the two. The 440 should be a 1/2 second faster but I think you should have put in a bigger cam. If you have the same intake,heads and carb I would think you would need to have a bigger cam to get the same cylinder fill or efficiency per cubic inch as the 383.
Have you tried different shift rpms? With the same small cam as the 383 the 440 hp would peak at a lower rpm then the 383.

As stated, this was the FIRST time out with the new engine. What we did try at the track was:
Swaped carbs with my tried and tested 930 Proform."I ran 11.8 with this carb".He gained about .040 and about 1/2 MPH. So we put his Demon back on. We changed plugs to a hotter plug. Picked up a little, but nothing to write home about. Increased timing from 33 to 38*. Picked up .050 to the 12.48 where we are at now with closed exhaust.
Headers are 1 7/8".
Uncorked the headers just for sh---'s and giggles.
Car ran a 12.28. So we know that the exhaust is restrictive and are going to work on that.

Did he ever run the 383 with open exhaust? Most likely the 383 would not pick up as much. Some of these guys that think a 383 is a better motor than a 440 are off base. Your buddy made the right move. Dollar for dollar the 440 will out run the 383.
The exhaust is what is restricting your 440. The 440 is exhaling more than the 383.
I have full 3 " exhaust on my 850 horse Cuda and uncapped I only pick up less than a tenth.
If he wants to run through the exhaust he should start by upgrading the exhaust.
By the way I am running Magnaflow mufflers. They are straight through.

My Roadrunner had a similar combo at one time.

800 DP
Team G intake
Home Ported 516's with 2.14I 1.81E valves
509 Hydraulic cam staight up, 10.2:1cr
Timing was at 36
3500 Stall converter
1 7/8 headers and flowmasters
4.30 gear and 12.5 x 28.5 MT sportsmans
3700 pounds with me in it.
12.1 at 110 mph in the Las Vegas heat, around 4100ft density altitude.

Your friends car should be in the very low 12's to high 11's like you estimated.

If everything was exact engine wise between the 383 and the 440, I would expect about a .5 better ET too.

But the 383 has .7 more comp then the 440, Theres 2 tenths IMO from that .5

The Torker II intake is a dog below 4500, some will say 6000 rpm. theres another 1.5 tenth with that 3500 vert your buds using.

Also, as you already found out, the exhaust is not guite up to the task with the extra cubes.

IMO, the above added into the combo, plus the Extra weight of the 440 kept the ETs around the same between the 383 vs 440.

The fix, Swap out that Torker II for a RPM.
Throw on a steel shim to gain some comp. back.
Upgrade the current exhaust as you have planned.

Then you will have your .5 gain or better IMO,

The 111 MPH of the new combo suggests sub 12,s as is with just a Vert swap alone. Id do that later after fine tuning what you have now.

Post deleted by viperblue72

Do the math. Hes nowhere near 10.5 to 1. Lucky if its 9.5 to 1.
Probably 2 points down from the 383.

Ya, you guys are right on the compression ratio. I was using 84 cc to get 10:1. Don't know why I was getting 10.5:1 ????????????. Not knowing exactly what the cc's of the head are, I have to go with the owners memory on how much, if any was shaved off. I'm going to recommend pulling the heads and going with the steel shim gaskets. He's stuck with the Torker II for now. Personally, I didn't think that was a bad choice for an intake. Thanks for the info and recommendations.

i have run that intake , then a team g, and a m1,
the dif is 10th between all three on my combo,
is it something yeah but money and time vs pickup , its a tune thing for me not the holdback!

not to brag , but i did say the reasons behind my thought why it didnt run faster,
have to ask why the change??
the 383 aint no slouch, it will run
was it tired? hurt?
the steel shim might get you close to the 10,0 comp
still think there was something behind that 383 causing same issue,
convert timming shift fuel ??,
this is a street car mostlsly?
im in race car mode,

Have the valve springs been checked? Just because the spec says 150 lbs. on the seat doesn't mean that that's what they are. You should have at least 140 lbs. on the seat. If the pressure is just low enough it won't sufficiently control the valve. I saw it on a friends 440 that out of no where slowed from 11.20's to 11.60's and the mph was down also. He checked the springs on the car they were all around 120-125 on the seat (very similar cam specs.). Installed new spring's @ 140 on the seat et and mph came right back. I also think pulling the heads to change to a steel shim gasket is a good idea but while the heads are off why not have the heads cut to bring the cc's closer to 78-80 cc and the springs can be checked at the same time.
According to the Kieth Black compression ratio calculator;
80cc chamber
4cc for valve relief's
.021 gasket
4.5 gasket bore
4.35 bore
.015 deck
3.75 stroke
= 10.81 compression
If you cut the heads and or change the gaskets don't forget to check piston to valve clearence.

The heads will only support 500 to 550 hp and both motors probably max the heads out.
So they will make the same HP but the 440 will peak at 15% lower rpms.
RPM performer intake will help.

I would try shifting about 5800 will want way lower shift point than the 383

I would degree the cam in at 102 should pick up some!

That 440 should run fine on straight 93 octane! more octane will likely slow it some!