What's new
CK5
Register an account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members.

700R4 TC Stall

RGV72BLAZER

RGV72BLAZER

1/2 ton status
Joined
Jan 23, 2006
Posts
2,444
Reaction score
68
Location
Edinburg*San Bene*Online-The Real South Texas
I know I know, it's been discussed extensively but every rig set up is different. I'll be running a mild SBC 350 on propane (maybe 275-300 hp)/ 700R4 (3.06:1) / 203-LoMax (6:1)/ 60-70 with 5.86s on 44s. I finally ran across the closest to perfect 700R4 that I want to run. It has a full reverse manual valve body built to the hilt with Art Carr parts. However, it does have a 2200 stall speed TC & I think it's too much stall for my application. So I'm open to suggestions. I plan to run mainly trails and rocks, mostly a trailer queen :eek1: . But do plan to drive it around town a bit, not much. And also plan a little bit of sand running & mud bogging. I'd say 95% trails/rocks, 3% street, 2% sand and mud. So let me hear 'em. Thanks. :D
 
That's a high stall for what you're using it for, but, it all depends what cam you're using. Stall needs to match the cam, not what you're using the rig for.
 
I would shoot for a stall in the 1200-1400 range. I have a 1000RPM stall converter on my truck and it does great but can be hard to stop if the idle is bumped up. You will have alot of gear so you will probably be better off with a little higher stall to offset the extra torque your gears will give you.

Once my truck reaches 1000-1200rpm I am either climbing whatever obsticle I am on or all 4 tires are spinning. I really like my stall speed at 1000 and woudln't change it unless I got alot deeper gears and it wouldn't stop or something like that.

Harley
 
Hossbaby50 said:
Once my truck reaches 1000-1200rpm I am either climbing whatever obsticle I am on or all 4 tires are spinning.
Harley
Click to expand...
yea when I searched I saw that you had posted this. good info. I just hear a lot of the guys running 1600-1800 range or would that still be too much?




mud hungry said:
Sorry guys Noob question what is a stall converter and what is it used for? How does it work?
Click to expand...
a torque convertor is a fluid coupling device to transfer energy from the motor to the tranny internals. I'm not too sure on how it works, I know some of the tranny gurus can explain it in detail but I know the fins have something to do in the process :D .
 
So what types of wheeler would you want a stall in. I am just asking because I am thinking of going with a 700r4 and if a stall is something that should get then i should know weither it is something that I will need.
 
every automatic tranny has a torque convertor. stall speed varies for every transmission because every vehicle is different. Rock/trail rigs tend to use lower stall speeds while mud racers/boggers tend to use higher stall speeds. So either way, you'll need a TC with the right stall speed to suit your wheelin' needs.
 
I am not sure I would go up to the 1800rpm range. That is above stock stall speed which is generally around 1500-1600 I believe. If you are worried about stall being to low I would run a stock converter and see how it does. You can change it later if you want if it doesn't match your needs. Going to high of a RPM range will mean your converter will always slip and create more heat then you want.

az-k5 has a 1200 stall with his th350/doubler and it does well for him with his FI 350. The only bad thing about stall that low is it won't let the motor rev up as fast for those play times when your wanting speed. If you have enough motor or gear though it won't matter. I have TPI on my mild 350 and it doesn't slouch when I want to baja it even with a 1000rpm stall.

Higher stall is good for not so strong motors with not enough gear. With a good motor and good gearing like it looks like you will have I wouldn't worry about not being able to get the good powerbands when you want to play.

Harley
 
The stall of the converter is the point where the converter sends engine power to the trans ( a 1000 stall would get the truck moving under power at roughly 1000rpm) though engine size and power affect the rated stall of an converter i.e. a 2500 stall on a small block would stall at roughly 2100 on a big block. you want a converter to stall at close to the lower operating range of the cam so if your cam comes in at say 1500-5000 a 1700 would be a good choice, stay away from high stall speeds as in a 4x4 it will spend most of the time slipping below the power band and create a lot of heat in the trans. hope this helps.
 
You must log in or register to reply here.

Latest Posts

Top Bottom