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Old 03-12-2003, 02:08 PM
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Post Best Ford Trans For High Horsepower

One of my friends asked me the other day if I could do a custom job on a car for him.He hasn't got one yet,but he wants a 1990-1995 Ford Mustang LX Coupe.He wants to grab every last horsepower out of it to be strictly a street/strip car.By a quick look at the Insurance Rates,it is not going to even cover 1/8 of what he wants to put in it.Here's the basic setup that he told me:

First of all..There will be No Computers on this car.He's about in the same boat as me.I don't like the computer-controlled cars either .Anyway,the computers will be removed and a new engine,transmission,gauges,etc. will be installed to accomidate for the conversion.Here's what he wants to do:

Engine:
Early 70's 302 Block
.030 Bore
Strenghtened Main Caps (If I Can Find A Place That Does This)
Flattop 10:1 Pistons
Scat/Polished Crank
Polished Cam
Roller-Tip Rockers
Ported/Polished Head
Oversize Valves
Weiand 8-71 Blower
2 Holley 650cfm 'Double Pumper' Carbs

Anyway..That should give you a good idea of what I plan to do to the car.Any suggestions on the transmission?I was thinking either a Tremec 5 Speed,Richmond 6 Speed,or a C6 Auto with Shift Kit.Which transmission would be the best choice and how could I set it up to handle 600/700 horsepower?Let me know!

Thanks!
Izzy

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Old 03-12-2003, 03:14 PM
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c4s can be built to handle 1000hp and rob less power than a c6. a stick would be real jerky with that much power.

You cant have 10:1 with an 8-71 blower unless you want to be blowin head gaskets all day long....waaaay to much cylinder pressure. The MAX i would go would be 8.5:1

[ March 12, 2003: Message edited by: mustang66maniac ]</p>
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Old 03-12-2003, 05:30 PM
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Um.....90-95 are 2 different body styles..Also m66m, you should know as much as I do that you can get an AOD to handle a little over 800 hp, might be a bit, but you can get a shift kit and 4R70W gear swap and have lower gears than the C4 and have an OD so you can get a lower rear gear.Steve

[ March 12, 2003: Message edited by: 5.0Towncar ]</p>
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Old 03-27-2003, 06:24 PM
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Cool

Performance Automatic Inc, has a c-4 that's guaranteed to handle 900+ hp, and comes with a warranty. They also sell the parts to bring your own c-4 up to their specs.

Good luck with the 'Stang<a href="http://www.performanceautomatic.com" target="_blank">Performance Automatic Inc.</a>
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Old 03-27-2003, 09:54 PM
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[quote]Strenghtened Main Caps (If I Can Find A Place That Does This)<hr></blockquote>


-Main Cap Girdle-

[ March 27, 2003: Message edited by: KULTULZ ]</p>
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Old 03-28-2003, 03:07 PM
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I think Lentec says their AOD conversions are good for over a 1000HP so you might check with them. With that much power, I'm not sure you would need the extra gear except to try and get a few more mpg's (if it's possible). The AOD is built on the old FMX geartrain and Ford used the Lincoln version (modified of course)in their automatic Thunderbolts in the '60's. Not the trans everyone talks about now days but very tough and still easy to get parts for.
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