440 Big block Stall converter

[Dusty 997]

So here's a question for a street driven car. 71 Duster with a mild 440. obviously will have a shitload of torque compared the a small block.

My guess is probably enough torque to blow the street radial tires off the car on launch if i hit the pedal too hard. So in this case, am i correct to assume when it comes to ordering a good quality stall converter, I do NOT need to have it built to as high of a stall level as if i was running a mild small block? Seems alot of folks are reccomending Tight 3000-3800 or so for small block street driven cars, does that guideline change with a big block due to the fact that if its already making more power than it can plant theres no reason to launch at an even higher rpm?


Already decided im gonna buy a good one, so not cheap, so id like to only have to buy it once and cry once

 

[TT5.9mag]

Next decide which company you are going to buy from. Call them and they will give you a form to fill out. Fill it out honestly and completely. Then they will build you a converter. It makes no difference what kind of engine (big block, small block) makes the torque, what matters is where it makes it and how you intend to use the car.

 

[318willrun]

So here's a question for a street driven car. 71 Duster with a mild 440. obviously will have a shitload of torque compared the a small block.

My guess is probably enough torque to blow the street radial tires off the car on launch if i hit the pedal too hard. So in this case, am i correct to assume when it comes to ordering a good quality stall converter, I do NOT need to have it built to as high of a stall level as if i was running a mild small block? Seems alot of folks are reccomending Tight 3000-3800 or so for small block street driven cars, does that guideline change with a big block due to the fact that if its already making more power than it can plant theres no reason to launch at an even higher rpm?


Already decided im gonna buy a good one, so not cheap, so id like to only have to buy it once and cry once

Call FTI converters. I love the one I put in my Duster.

Here are a couple that may fit the bill as you described ... and if you want more "stall", they have them. They make all out race converters also.

FTI Performance MRC33808 FTI Performance MR Series Torque Converters | Summit Racing

FTI Performance SRC30828 FTI Performance SR Series Torque Converters | Summit Racing

 

[Dusty 997]

Call FTI converters. I love the one I put in my Duster.

Here are a couple that may fit the bill as you described ... and if you want more "stall", they have them. They make all out race converters also.

FTI Performance MRC33808 FTI Performance MR Series Torque Converters | Summit Racing

FTI Performance SRC30828 FTI Performance SR Series Torque Converters | Summit Racing

Will they let you give them all the info about your car and make it specific, or are they more "off the shelf" type deal

 

[Dusty 997]

Next decide which company you are going to buy from. Call them and they will give you a form to fill out. Fill it out honestly and completely. Then they will build you a converter. It makes no difference what kind of engine (big block, small block) makes the torque, what matters is where it makes it and how you intend to use the car.

makes sense. its street driven only, but my thoughts are its probably making a ton of torque right off idle already so i was curious whether a higher like 3000ish stall would just result in even more tire spinning than it will already have, or if itl somehow make it better.

 

[318willrun]

Will they let you give them all the info about your car and make it specific, or are they more "off the shelf" type deal

both.

 

[Icetech]

FTI 100%... they are great to deal with.. I went with a off the shelf 3200.. then had them redo it to 3800 later... (haven't tried the 3800 yet, waiting for summer...)

 

[TT5.9mag]

makes sense. its street driven only, but my thoughts are its probably making a ton of torque right off idle already so i was curious whether a higher like 3000ish stall would just result in even more tire spinning than it will already have, or if itl somehow make it better.

Depending on camshaft size and compression ratio it’s probably not making much more torque just off idle than a warmed up small block. There might be 15-30 lb/ft difference from the cubic inch difference at 2500 rpm.

 

[Ricks70Duster340]

Also, what rear end gears are you running?

 

[abodyjoe]

So here's a question for a street driven car. 71 Duster with a mild 440. obviously will have a shitload of torque compared the a small block.

My guess is probably enough torque to blow the street radial tires off the car on launch if i hit the pedal too hard. So in this case, am i correct to assume when it comes to ordering a good quality stall converter, I do NOT need to have it built to as high of a stall level as if i was running a mild small block? Seems alot of folks are reccomending Tight 3000-3800 or so for small block street driven cars, does that guideline change with a big block due to the fact that if its already making more power than it can plant theres no reason to launch at an even higher rpm?


Already decided im gonna buy a good one, so not cheap, so id like to only have to buy it once and cry once

best bet is to call a company like dynamic, ultimate or ptc and tell them what you have and your intended use and go from there. the converter will depend on the actual combination (engine combination,trans,rear gear, tire size, cars weight and most importantly the intended use). you have to be 100% hostest with them and yourself in all areas or you risk not being happy.

 

[Dusty 997]

Depending on camshaft size and compression ratio it’s probably not making much more torque just off idle than a warmed up small block. There might be 15-30 lb/ft difference from the cubic inch difference at 2500 rpm.

10.1 comp, 3.73 gears, 224/232 @ .050”, 270/282 adv, .488”/.503” lift on 112 LSA cam.


Think ill probably give Dynamic a call.