Converters, how do you know if your too tight or too loose?

[01SilverGt]

Foot braking your converter and flashing the converter wide open throttle from idle acts totally different. I have a 3400 stall from circle d it will only hold until 2300 rpm before it spins the tires. Just a heads up op.

 

[stang910]

My buddy has a Terminator with a C4 and KB (22psi) and he has run 9.60's@140+. Pretty sure he has a 4000 stall.

 

[BADASS03SVT]

I am running a 3200 stall and it flashes to about 4300. Now I only make 377hp 38*tq. It sounds like your converter way to tight for your set up

Uhhhhh what???

 

[BADASS03SVT]

I don't have a TB so there is no more getting that sixty down. Punch and go, and it hooks. Like I said I'm going to go c4 with a TB, should wake it up. Also it went a best of 144 with stick.

Your going about it the wrong way. What is a C4 going to do?????

 

[Evo2SVT]

Uhhhhh what???

It is a 3200 stall that is very loose and flashes about 4200-4300. I can only foot brake my car to about 2600 and if I stomp it goes to 4200-4300. Now off the trans brake I have it set for 4000. I wanna pull it out this winter and get it tightened up some

 

[BADASS03SVT]

It is a 3200 stall that is very loose and flashes about 4200-4300. I can only foot brake my car to about 2600 and if I stomp it goes to 4200-4300. Now off the trans brake I have it set for 4000. I wanna pull it out this winter and get it tightened up some

You might have "asked" for a 3200 but if it flashes to 4200 thats much closer to your actual stall speed...foot brake stall is meaningless. A trans brakes would tell you your true stall

 

[Brutal Metal]

^^ I agree with Jake, and OP it surely isn't PTC's first rodeo they have Many knowledgeable guys in that company ASK to speak to one...

 

[Evo2SVT]

You might have "asked" for a 3200 but if it flashes to 4200 thats much closer to your actual stall speed...foot brake stall is meaningless. A trans brakes would tell you your true stall

Then that would be about 4300-4400

 

[itSSlow98]

2200 isnt much more then stock for a lot of cars. I would say mid 3500 at least.

 

[BADASS03SVT]

Then that would be about 4300-4400

yup I would say within a few hundred of the flash

 

[turbotrail93]

Your going about it the wrong way. What is a C4 going to do?????

I have a built C4..my 4r70w isn't built it's bone stock aside from an intermediate shaft and a PTC converter. Which could be half my issue might be slipping up high rpm range. So instead of buying new clutches etc I could just throw in the C4. Before you ask why not go c4 to start with it because I drive the car to Georgia from florida occasionally and liked OD.

 

[BADASS03SVT]

I have a built C4..my 4r70w isn't built it's bone stock aside from an intermediate shaft and a PTC converter. Which could be half my issue might be slipping up high rpm range. So instead of buying new clutches etc I could just throw in the C4. Before you ask why not go c4 to start with it because I drive the car to Georgia from florida occasionally and liked OD.

so sell the C4 and build the 4r? you need at least 3.55s and a 28" tire....Id rather have 3.27s though to use a C4 on the highway. Plus its non lockup / smaller so will run warmer. The 4r will handle your power / weight better than a C4 imo.

 

[turbotrail93]

so sell the C4 and build the 4r? you need at least 3.55s and a 28" tire....Id rather have 3.27s though to use a C4 on the highway. Plus its non lockup / smaller so will run warmer. The 4r will handle your power / weight better than a C4 imo.

That's a possibility, I'll look into more of my decision this weekend when I take the trans out and find out out if theirs anything burning up inside and getting the converter right.

 

[turbotrail93]

Have a 4500stall Circle D shipping out today, we will see what this does for now.

 

[Stanger00]

Be ready for the lock up. These Circle D units grab hard! It feels like another gear when mine locks up. I am not pushing any power like you but I ran 127 in the 1/4 with 600hp. I picked up 34mph from the 1/8th. I just need to have the converter lockup adjusted to a higher MPH since its locking too early. It makes my car bog down and kills its momentum.

I think the converter with that low of a stall was killing you too. I run a street friendly 3300 from Circle D. My max torque comes in around 5k rpms.

 

[turbotrail93]

Be ready for the lock up. These Circle D units grab hard! It feels like another gear when mine locks up. I am not pushing any power like you but I ran 127 in the 1/4 with 600hp. I picked up 34mph from the 1/8th. I just need to have the converter lockup adjusted to a higher MPH since its locking too early. It makes my car bog down and kills its momentum.

I think the converter with that low of a stall was killing you too. I run a street friendly 3300 from Circle D. My max torque comes in around 5k rpms.

You don't have your Lock up on a switch? I can hit a button and activate lock up in high gear

 

[Fast Orange]

so sell the C4 and build the 4r? you need at least 3.55s and a 28" tire....Id rather have 3.27s though to use a C4 on the highway. Plus its non lockup / smaller so will run warmer. The 4r will handle your power / weight better than a C4 imo.

Jake is right, I have a built 4r7w with a Pro Torque convertor and my car has been 8.30's @ close to 170 mph.

 

[Stanger00]

My auto is ECU controlled. I put the car in D and stab the peddle and it shifts when its commanded too. Just need to adjust converter lock up in 3rd gear.

 

[turbotrail93]

My auto is ECU controlled. I put the car in D and stab the peddle and it shifts when its commanded too. Just need to adjust converter lock up in 3rd gear.

Sweet, your converter a single or triple disk?

 

[Stanger00]

I got the triple