Question about a stall converter
Thread Starter
|
Freshman User
Joined: Jan 2007
Posts: 30
Likes: 0
From: holland mi
Question about a stall converter
ok i have a 1996 f150 with a stock 300, trans is a C-6, 4:10 gears 35" tires. My question is what would be the largest stall i could install to help the truck in the dunes? What would happen if i installed a 2200-2500 converter?
Postmaster
Joined: Mar 2002
Posts: 3,545
Likes: 4
From: Coal Region
C6 in an F-150...highly doubtful it came from the factory. I wouldnt mess with a stall, as the 2200-2500 is already out of its peak torque and would give u a very narrow powerband (like 1200-900 rpms).
U need a little more rpm to keep the tires turnin. Either a cam swap or more gearing.
U need a little more rpm to keep the tires turnin. Either a cam swap or more gearing.
Thread Starter
|
Freshman User
Joined: Jan 2007
Posts: 30
Likes: 0
From: holland mi
ya its not factory, i got the truck it was a 2wd, so i had a 86 doner truck that i took the trans and trafer case out of then i did a solid axle swap up front, the truck already had a good running 300, so i stuck with it. I like the torque it has but, i was just wondering about putting a stall in it to help it around the dune and when i haul my trailer.
Senior User
Joined: Jun 2011
Posts: 144
Likes: 0
TIA
David
Elder User
Joined: Nov 2004
Posts: 666
Likes: 5
If you have a torque converter with a 2500 RPM stall rating, if you were sitting still with your foot firmly on the brakes and you began to slowly increase the RPM of the engine, when you reached 2500 RPM engine speed, the engine would no go any higher in RPM without the wheels turning.
A factory torque converter behind a mild mannered engine like the 300, might have a stall speed of something like 900 RPM to 1200 RPM.
Having a stall speed of 2500 RPM behind an engine that runs out of torque at 3000 RPM would be a really bad choice.
Senior User
Joined: Jun 2011
Posts: 144
Likes: 0
The question really is, what is the stall rating of a torque converter. Every torque converter has a stall rating. The easiest way to envision, in real world terms, what the stall rating is, think of it this way:
If you have a torque converter with a 2500 RPM stall rating, if you were sitting still with your foot firmly on the brakes and you began to slowly increase the RPM of the engine, when you reached 2500 RPM engine speed, the engine would no go any higher in RPM without the wheels turning.
A factory torque converter behind a mild mannered engine like the 300, might have a stall speed of something like 900 RPM to 1200 RPM.
Having a stall speed of 2500 RPM behind an engine that runs out of torque at 3000 RPM would be a really bad choice.
If you have a torque converter with a 2500 RPM stall rating, if you were sitting still with your foot firmly on the brakes and you began to slowly increase the RPM of the engine, when you reached 2500 RPM engine speed, the engine would no go any higher in RPM without the wheels turning.
A factory torque converter behind a mild mannered engine like the 300, might have a stall speed of something like 900 RPM to 1200 RPM.
Having a stall speed of 2500 RPM behind an engine that runs out of torque at 3000 RPM would be a really bad choice.
Thanks Jim!!
David
Post Fiend
Joined: Dec 2007
Posts: 8,521
Likes: 16
From: Lost
Just to add a little more info, the 300 uses a lower stall speed converter than a V8 gasser. The V8 diesel, used the same lower stall speed as the 300. This is speaking in terms of the C6, which was offered behind the 300 only, in terms a 6cyl, as well as V8 gas/diesels.
The 300 and V8 diesel both start making torque at a lower RPM than most V8 gassers, so the converter was tweaked to take advantage of it. I'm not sure, but I believe the 300 and diesel actually use the same converter. Later diesels went to a 6 bolt converter, which obviously meant a different converter.
The 300 and V8 diesel both start making torque at a lower RPM than most V8 gassers, so the converter was tweaked to take advantage of it. I'm not sure, but I believe the 300 and diesel actually use the same converter. Later diesels went to a 6 bolt converter, which obviously meant a different converter.
Thread
Thread Starter
Forum
Replies
Last Post
Pkupman82
Clutch, Transmission, Differential, Axle & Transfer Case
3
Jan 29, 2017 08:30 AM
Zazoos
1973 - 1979 F-100 & Larger F-Series Trucks
6
Oct 6, 2016 06:04 PM
StinkyGringo
1973 - 1979 F-100 & Larger F-Series Trucks
5
Dec 29, 2014 07:14 PM
71cc
Clutch, Transmission, Differential, Axle & Transfer Case
1
Feb 13, 2010 08:53 AM
Busa01
Performance & General Engine Building
27
Oct 9, 2003 08:51 PM
