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Customers

Henry T.

Henry T.

HEY! Everything is installed and car runs AWESOME! Thanks for everything, Thanks again. Henry 2000 Dodge Viper R/T 10
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Billy W.

Billy W.

Dakota R/T 408
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Brian C.

Brian C.

I have never had any problems with John on any transaction. One of the few vendors I have never had a single problem with. Including paying overnight...
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Daryl S.

Your 408 runs like a dream. I think we are well over the 400hp side, a new 300hp mustang could not overcome, it is a beast. I am very happy with the...
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Phil S.

Phil S.

Great job creating this Dakota R/T Ground Affects Kit. Phil
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David P.

David P.

Thanks for the brake lines !
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Colton H.

Colton H.

"Johns the man, bought a 410 package from him years ago after I got back from overseas. The caveat I gave John was that it had to pass Californian...
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Dan F.

Dan F.

John, The truck is not done but i drive it daily and it runs good now. Eventually id like to do the rear brakes! Thanks
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Jim W.

Jim W.

Thanks for the fast parts service and Great cylinder head porting! Jim
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Shaine D.

Wow! Thank you for that quick and informative response. Must be why you are always recommended. Shaine
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Kyle M.

Kyle M.

John, I am very pleased with the brake conversion. The kit was very easy to install and I didn't have any problems and look very good as...
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Brian A.

Brian A.

The 408 engine runs strong, put on dyno 405hp with 415tq N/A not shabby.. also was on 22" wheels with those numbers est. 500-525 @ crank. Thanks so...
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Dan B.

Dan B.

Dakota R/T 408, Thanks for everything! Dan https://www.youtube.com/watch?v=wZekmXKYXA4
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Mitch C.

Awesome work! Glad I went with you guys! Anyone I know of that wants to build I'll send your way! Thanks John! Your the man!! Mitch
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Don S.

John, I can't emphasize this enough, but without the help you're getting me I could not have afforded my dream engine! I literally have cringed when...
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Jim A.

Jim A.

Two year champion in modified tractor pulling classes named "Watch This Trick". Chrysler 426 Hemi. Thanks for the Great Service!
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Harold R.

John, Thanks for the great customer service! Harold
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Steve B.

Steve B.

Thanks for the help with my 426 stroker.
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Ken L.

John, Thanks for all your help. I wish I had known about you before I ordered the rest of my stuff! Thanks, Ken
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Troy K.

Troy K.

Dodge Viper
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Taylor M.

Taylor M.

Thanks a lot John !
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Steve F.

Thank You for all your help and hookups with the parts - sounds like a lot of people appreciate it, I'm one of those people. - Steve
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Brian R.

John!! Got my Viper back together, dyno tuned. Super happy with the results of your work!! Gained 112 RWHP and 107RWTQ!!!!! More at the crank. Sounds...
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Michael W.

Michael W.

After getting all the compatible stuff shes a beast! Michael
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Bill S.

Bill S.

Thanks John, 426 Hemi stroker 588 https://www.youtube.com/watch?v=1dJdt0ZFzjU
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Performance Automatic Torque Converters

Torque converters are generally grouped by size (diameter) and stall speed. As the diameter of a torque converter decreases, the stall speed (RPM) goes up. Most factory torque converters are 12-13 inch in diameter and have a stall speed around 1600-1800 RPM. This promotes excellent fuel economy and drive-ability because they are specifically designed for these purposes. The problems arise when modifications are done to the fuel system, camshaft and other engine control systems. Smaller diameter converters are needed to provide more slip at idle. This allows engines with a lot of camshaft to idle better. As the torque converter and horsepower range is moved higher through the RPM range, the smaller torque converters with their higher stall speeds provide maximum torque multiplication where needed. Also the same torque converter will react differently when used behind different engines. So make your converter selection with the help of qualified personnel. Performance Automatic has endless converter combinations to make your car or truck perform at its utmost potential.

11" Converters
Built from racing traditions, our 11" converters are built to take the punishment. Fully furnace brazed with extra bearings and balanced to provide years of dependable service. This is the famous 11 inch converter that is our hottest selling street/strip converter. Designed to give approximately 1000 rpm stall over a stock converter, this unit will provide greater launch, and low end power. It is designed to withstand the punishment of full-throttle starts.


10" Converters

Performance Automatic has recognized the importance of building a full race, 10 inch converter that is affordable to all. Our 10 inch Pro Launch is designed to be used in conjunction with high compression, nitrous oxide, bigger duration cams, and stout gear ratios or supercharged and turbo applications. Stall speeds of 1000 to 2000 rpm over stock converters can be expected. Additional cooling is a must. These converters are just the ticket for street applications provided with proper cooling and gear ratios. Just bolt in and hang on!

9" Converters

Custom designed for better lock-up and MPH, our 9" delivers optimum performance with nitrous and blower applications. Torque monsters can also benefit from superior stator configuration and anti-ballooning plates. Very popular in True Street, this converter is a must for those who still take their race cars for an occasional cruise. A wide variety of custom stall speeds are all available.

8" Converters
If you want to reduce reaction times, this is the converter for you. Designed for full-throttle, transbrake, pro-tree operation; this unit will give you the edge over your competition. Tested and proven to be a winner, our 8 inch converter is designed for round after round of heavy competition, and Built To Win. A leader in 8 inch converter design, Performance Automatic employs the latest in construction techniques to provide the ultimate in performance, reliability, and consistency. A converter specification sheet should be filled out so that we may provide you with the best possible converter for your application. As always, we are available by phone for advice, or to answer any questions you may have.





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