What Torque Converter for a G3 Hemi w/727? 460 HP Pace Performance Crate Motor

[cudaragtop]

How much stall and what brand/model Torque Converter are you guys running with your G3 Hemi?
Would like to know what works well with this 727 combo.

Planning for a Crate 5.7 from Pace Performance for our project.
The car will have:
Full Manual, Reverse Valve Body HD 727 built by Pat Blais.
3.55:1 8-3/4 Sure Grip, Gear Vendors OD, 25.7" tires 275/40-17
Here are the engine Specifications:
Power: 460 HP at 6300 RPM, 448 ft. lbs. of torque at 5100 RPM
Displacement: 345 CID, 5.7L
Bore x Stroke: 3.92" x 3.58"
Compression Ratio: 10.5:1
Recommended Fuel: 92 Octane
Block: Cast Iron, 1 piece rear seal, 4-bolt main caps
Crankshaft: Nodular Iron
Connecting Rods: Powdered Metal Steel
Pistons: Hypereutectic Aluminum
Camshaft: Hydraulic Roller Tappet
Cam Lift: .547" Intake / .550" exhaust
Cam Duration at .050": 224 deg. Intake / 228 deg. Exhaust
Lobe Separation: 114 Degree
Cylinder Heads: Aluminum Hemi Eagle Port.
Rocker Arms: Stamped Steel, 1.65:1 Ratio
Valve Springs: Upgraded SRT
Balance: Internal

Thanks,

Anyone have comments about B&M, TCI or Hughes.
Summit has a Hughes 24-25HD that is ~2500 for $387.97 https://www.summitracing.com/parts/hup-24-25hd
and a Hughes 24-25 that is also ~2500 for $307.97 https://www.summitracing.com/parts/hup-24-25
The difference is a HD Sprag in the 24-25HD...
TCI Breakaway Torque Converters 141276 2400 Stall $392.97 https://www.summitracing.com/parts/tci-141276/overview/
No luck finding a factory 10-3/4" 727 high stall rebuilt converter or a core to rebuild...

Thanks!
Both are 11" converters

[cudaragtop]

Well, I guess there will be a change in plans....
Johnny at Pace Performance is gone and they no longer offer the 460 HP 5.7 Crate Motor...

So, now I need to choose what G3 Hemi to put in the car. 

[303 Mopar]

So, now I need to choose what G3 Hemi to put in the car. 

The 392 with a manual trans is awful nice!   

[cudaragtop]

Looking into it. What are the major differences between the 345 and 392? Still have the built full manual reverse valve body 727 that will be used.

[303 Mopar]

Looking into it. What are the major differences between the 345 and 392? Still have the built full manual reverse valve body 727 that will be used.

Besides the obvious displacement, +100 HP and +100 TQ the 392 has bigger heads and cam and a different intake.  Sounds like you were ready to spend a fair chunk of change on the stroked 5.7, and I don't think a 392 would be that much more.  I also ran a 727 manual valve body on mine for the first 6 months until I saved up enough to swap in a Passon 4 spd OD.  It is a night and day difference, almost like the 392 was built for a manual trans.  The engine is just so much more responsive and powerful now.

[cudaragtop]

Looking into it. What are the major differences between the 345 and 392? Still have the built full manual reverse valve body 727 that will be used.

Besides the obvious displacement, +100 HP and +100 TQ the 392 has bigger heads and cam and a different intake.  Sounds like you were ready to spend a fair chunk of change on the stroked 5.7, and I don't think a 392 would be that much more.  I also ran a 727 manual valve body on mine for the first 6 months until I saved up enough to swap in a Passon 4 spd OD.  It is a night and day difference, almost like the 392 was built for a manual trans.  The engine is just so much more responsive and powerful now.

What torque converter? Are the heads physically larger or just bigger ports. The Pace 5.7 was not stroked but had some extras that got it to 460 HP. Eliminated the MFS and VVT among others. You in Denver? I'm here till Friday. Work. Would love to see your build if we can fit our schedules. As long as the 392 will fit in my A body engine bay... may be the way to go. Sounds like the same money. Is the VVT and MDS eliminated on the 392 crate motor?

Sent from my SM-G950U using Tapatalk

[303 Mopar]

Looking into it. What are the major differences between the 345 and 392? Still have the built full manual reverse valve body 727 that will be used.

Besides the obvious displacement, +100 HP and +100 TQ the 392 has bigger heads and cam and a different intake.  Sounds like you were ready to spend a fair chunk of change on the stroked 5.7, and I don't think a 392 would be that much more.  I also ran a 727 manual valve body on mine for the first 6 months until I saved up enough to swap in a Passon 4 spd OD.  It is a night and day difference, almost like the 392 was built for a manual trans.  The engine is just so much more responsive and powerful now.

What torque converter? Are the heads physically larger or just bigger ports. The Pace 5.7 was not stroked but had some extras that got it to 460 HP. Eliminated the MFS and VVT among others. You in Denver? I'm here till Friday. Work. Would love to see your build if we can fit our schedules. As long as the 392 will fit in my A body engine bay... may be the way to go. Sounds like the same money. Is the VVT and MDS eliminated on the 392 crate motor?

The heads have bigger ports. And yes, the 392 crates is manual trans non-MDS engines, so you have to remove the bearing in the rear of the engine.  There are some guys on the Gen III FB page that have stuffed one of these into a Dart.  I'm sure there will be some fab work, there always is.  I am around on Friday, about 25 min south of DIA if you want to send me a PM and stop by.

[cudaragtop]

Looking into it. What are the major differences between the 345 and 392? Still have the built full manual reverse valve body 727 that will be used.

Besides the obvious displacement, +100 HP and +100 TQ the 392 has bigger heads and cam and a different intake.  Sounds like you were ready to spend a fair chunk of change on the stroked 5.7, and I don't think a 392 would be that much more.  I also ran a 727 manual valve body on mine for the first 6 months until I saved up enough to swap in a Passon 4 spd OD.  It is a night and day difference, almost like the 392 was built for a manual trans.  The engine is just so much more responsive and powerful now.

What torque converter? Are the heads physically larger or just bigger ports. The Pace 5.7 was not stroked but had some extras that got it to 460 HP. Eliminated the MFS and VVT among others. You in Denver? I'm here till Friday. Work. Would love to see your build if we can fit our schedules. As long as the 392 will fit in my A body engine bay... may be the way to go. Sounds like the same money. Is the VVT and MDS eliminated on the 392 crate motor?

The heads have bigger ports. And yes, both the 345 and 392 crates are manual trans non-MDS engines, so you have to remove the bearing in the rear of the engine.  There are some guys on the Gen III FB page that have stuffed one of these into a Dart.  I'm sure there will be some fab work, there always is.  I am around on Friday, about 25 min south of DIA if you want to send me a PM and stop by.

Fly home Friday AM. Maybe next trip. :-)


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[cudaragtop]

Ordered this 6.1 from Cleveland Power and Performance.
Complete Running Zero mile reman. Worked out a deal for just the engine minus the pallet.
All front accessories, Exhaust manifolds, Harness, Computer included.
Looking into Gold Box to replace the factory box. Anyone have experience with the Gold Box and Harness?

6.4 would have been more of a challenge to fit into an A-Body. Wanting to keep my wiper motor is just one...

Let me know if the video works.


Video link: Click on the landing image to play full screen with audio.
https://photos.app.goo.gl/J53OtXlNbCDS9uKm2

More pictures here:
https://photos.app.goo.gl/A2sCOTpa96I12zRS2

[HP_Cuda]

Do you have any dyno info on this motor?

Ideally you want to get a converter that matches your powerband and moreover you want the stall to lock up somewhere close to the peak torque of the engine.

[cudaragtop]

Factory spec. is 420 torque @ 4,800
no dyno.

I decided to go with a factory Chrysler 10-3/4" "High Stall" converter. Rebuilt by a local shop.
Won't know what the actual stall is until we get it on the road...
I found these numbers for the Factory Chrysler Converters.

Engine ................ Diameter ............. Stall-Rate
* 225 ...................... 10.75" ................ 1450 to 1650
* 273 ...................... 10.75" ................ 1800
* 318 ...................... 10.75" ................ 1750 to 1950
* 340 ...................... 10.75" ................ 2250 to 2450
* 383 {2-Barrel} ...... 11.75" ................ 1850 to 2150
* 383 {4-Barrel} ...... 10.75" ................ 2350 to 2650
* 440 {4-Barrel} ...... 11.75" ................ 2000 to 2350
* 426 {Street Hemi} . 10.75" ................ 2650 to 2850

[Chryco Psycho]

This has a lot to do with final gear ratio
you do not want to be doing 70 MPH at 2000 rpm with a 2600 rpm converter for example