I have a 1973 Mach 1 that I am setting up for "Spirited" street performance. The goal is to try and run with the late model MOPARS and Corvettes.
The motor is a 545 solid roller that has been dynoed at 731.6 ft-lbs of torque at 4500 RPM. Horsepower is 704.1 at 5900 RPM (torque drops off to 625.7 at that RPM).
Per the dyno, torque was measured at 719.7 Ft-lbs at 4100 RPM (567HP at that same RPM).
The transmission is a 1000HP Broader unit and I am looking at running a 3.89 or 3.91 rear gear with 31 splines.
Again, the car is to be street driven with all the comforts that come with late model rides.
I am trying to determine the best converter (and stall) to run with this combination and would appreciate any inputs.
Your best bet would be to talk to one of the converter companies and have one built for your application. Lenny at UCC just did one for my buddy and it's spot on.
I agree with Bob, 3500-3800 will be sweet BUT to get the correct stall have the converter built to suit your motor. Give a GOOD converter company all your specs and let them do their thing.
Like I tell anyone , an Off the shelf converter or Ebay special is hit or miss at best
I got with one of their representatives with my requirements and received a recommendation to use one of their XHD (Extra Heavy Duty) 10" converters. They claim it can be set to stall from 2800 - 3800 RPM.
Any of y'all have any experience with using this converter or this company?
I got with one of their representatives with my requirements and received a recommendation to use one of their XHD (Extra Heavy Duty) 10" converters. They claim it can be set to stall from 2800 - 3800 RPM.
Any of y'all have any experience with using this converter or this company?
I've been looking at the Jegs converters, and according to other forums and a fellow in the classifieds, the Jeg's XHD unit is Transmission Specialties. Been reading a lot of positive posts about them.
I'd like to just dial up a well known company myself, but an $800 converter just isn't in the budget for me right now. Still have a lot of other parts to get, so I'll probably just give one of those a try.
hey, sounds like your combo may not be far off mine. what size tire, stock suspension, car weight? I would also recommend talking to chris at continental torque converter. good converter reasonable price.
This motor is built from the 429SCJ block I got from you a couple of years ago and is going into my '73 Mach 1.
The tires will be the Mickey Thompson Street Radials (3555 325-50R15) tires. These tires are 28.3 inches in diameter.
The suspension will be one of Mustang Plus's Street Heat Suspension kit which consist of 5 leaf mid-eye rear springs, 620 pound front coils springs, 1 1/8" front sway bar, 3/4" rear sway bar, and KYB shocks. Car will also have TCP Sub-frame connectors.
The car should weigh approximately 3400 pounds with me in it...a LOT of aluminum in that 545. LOL
your car is a bit lighter than mine . mine is 3890 . sounds like you are not setting yours up for straight line only. mine is a 10:1 521 p51 head motor and run 10.80 with exhaust on pump gas with the loose converter that i am selling (spinning). i put another converter i had laying around that only flashed 2700 rpm and it still went 10.95. i think if you are mostly street you would be good with around 3000-3300 stall . these motors make alot of torque let it do the work.
wayne
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