TSP 9.5" Street/Strip converters- Lifetime warrantee!

Discussion in 'Tri Shield Performance' started by Jim Weise, Feb 5, 2008.

  1. Jim Weise

    Jim Weise EFI/DIS 482


    It's a 245MM GM Shell, that was used in a big variety of GM cars in the 80's and 90's. That smaller diameter one seems to be the best for the A bodies, and with HD aftermarket parts, good up to 900 HP. We offer a STG 1 (up to 550 HP) STG 2 (Up to 650 HP) and STG 3 (Race converter for T brake up to 900 HP)

    We also build with both the 258MM and 265MM GM cases, but those converters are typically only needed for super HI HP combos. They are also considerably more expensive, since they all have to have the forged cover (used in the STG 3 9.5) because it's required to be able to build it to the right height to fit the earlier transmissions.

    I have sold a lot of those 9.5" converters now, and to date, have had no failures that I am aware of.

  2. WhiteRiviera

    WhiteRiviera Well-Known Member

    Are the converters still available?
  3. flynbuick

    flynbuick Guest

    Send JW a PM over the Board.
  4. killrbuick66455

    killrbuick66455 Well-Known Member

    I'm interested in a 9.5 converter 3000 stall for a turbo 400, Are they in stock or have to be built ?
  5. Jim Weise

    Jim Weise EFI/DIS 482

    Hi Eric,

    Good to talk to you yesterday, and yes, all converters are custom built, take aprox 10 business days.


  6. killrbuick66455

    killrbuick66455 Well-Known Member

    Hey Jim Same here, When I was talking to you I forgot to wish you a happy birthday :Dou:
  7. flatire

    flatire Well-Known Member

    Any one have issues with the 9.5" convertor producing too much heat on the streets or highways?
  8. jay3000

    jay3000 RIP 1-16-21

    Not here.. I'm buying another soon..
  9. RG67BEAST

    RG67BEAST Platinum Level Contributor

    Jim I'm presently working on some heads for a 489 chevy for freind. Going into a tubed chasis vega w/the motor. Can you calculate the conv. needed after the engine dyno is done along with the rear ratio. Thanks.
  10. Jim Weise

    Jim Weise EFI/DIS 482

    Sure, with a sheet it's no problem.

    Let me know when it gets off the dyno, and we can get together on one.

  11. johnnylark

    johnnylark Well-Known Member

    Quick question, im currently running a turbo 400 but was thinking about going with a 700r4. I havent really seen anyone use the 700 on a street/strip application in th i s forum. Is the 700 not recommended? Do you have converters for the 700? Just dont know what to do. Thanks in advance.
  12. DauntlessSB92

    DauntlessSB92 Addicted to Buick

    Jim if you could send me a PM when you have a chance, I am interested in one of your 9.5" converters for my small block 200-4r car
  13. killrbuick66455

    killrbuick66455 Well-Known Member

    Hey Jim,Can you do a 9.5 3300 stall converter for a 700R4 ? Thanks
  14. Jim Weise

    Jim Weise EFI/DIS 482


    Billet cover, triple disc lockup is $765.00

    Just did a similar one for a board member here earlier this year.

  15. killrbuick66455

    killrbuick66455 Well-Known Member

    could there be a non lockup option ??
  16. Jim Weise

    Jim Weise EFI/DIS 482

    Sure, same converter, forged cover $665

    That's the standard price now for all my non lockup 9.5" converters. Up about $100 from what I used to offer, the new manufacturer has a great deal on forged covers, and that is what we use now exclusively. Same cover that used to be on my $900 converter. I felt that the big upgrade for such a small extra cost was worth it. All converters now have HD 7/16-20 mounting lugs.

  17. fiedlers buhog

    fiedlers buhog New Member

    hi Jim . I have a 4200lb rw 1970 GS with a VP converter . the eng is a 535 BBB stroker,the converter low stall is 1400 and high is 4500 best 60' is 1.51 et 1070 @ 125.95 and spun hard in 1st but has gone 127 I was wondering if my converter could be tighter for top end as with 3.91 gears its 6500rpm out the back and I don't like to spin it that hard . but I like the switch on the street for fun !!I did dyno the eng 757tq @ 4800 /767hp @ 6000. I think I got that converter from poston back 12years ago
  18. Jim Weise

    Jim Weise EFI/DIS 482

    1400 is already modified to be lower than stock, so I doubt your going to get any serious rpm reduction with converter. You will probably have to run a taller slick, or drop the rear gear, with your present combo.

    What tires are your currently running?

    I also think the car would be faster with the correct 9.5" fixed pitch converter, but yes, not as much fun on the street.

  19. Gary Bohannon

    Gary Bohannon Well-Known Member

    Really like your converter.
    If I run the 1/8th mile and cross the line at 90 mph, I need to know what % of converter slip to expect from the 9.5" 3500 converter I bought from you.
    I plan to use my th400 in 2nd gear, 3.42 rear, and MT 28" sticky tire.
    My original BUICK tach is not accurate enough to guarantee the 6000 rpm limit for my stock rod/piston engine. Just checked a Wallace calculator and got 5465 rpm at 90 mph based on 3.42 x 1.48 (2nd gear) = 5.06 gear.
    Now I need to add the converter slip to the 5465 rpm to assure a safe 6000 rpm limit at the finish line. What is your best guess on slip rpm?
    Last edited: Jul 4, 2015
  20. Jim Weise

    Jim Weise EFI/DIS 482

    First off, I would suggest it's a good idea to temporarily attach an accurate aftermarket tach for testing.

    I think you will be ok, should be around 5700-5800 rpm at 90 mph in 2nd gear. Maybe slightly less.

    Get an accurate rpm/finish line mph and the rollout of the rear tires, and we could figure the converter slip pretty close.

    But that would be my best guess, figuring with lockup, you would be at just shy of 5500.


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