Will a 700R4 withstand BBC 500+ lb-ft of Torque? - Page 2 - Hot Rod Forum : Hotrodders Bulletin Board
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  #16 (permalink)  
Old 02-22-2006, 04:16 PM
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Why not use a 2004R? That would solve the first gear issue and 4th gear is numerically lower so the cruise rpm will drop a couple hundred.


Larry
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  #17 (permalink)  
Old 02-22-2006, 07:55 PM
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I'm not familiar with that tranny, do you have the gear ratio numbers for it?

I was talking to my friends cousin who's a mechanic and he said to stay away from the 2004R's because they were junk and wouldn't hold up very well to a big block motor.

He also said that a 700R4 built to 'Stage 3' should be more than able to withstand the torque of a 496.
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  #18 (permalink)  
Old 02-22-2006, 08:04 PM
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A 500hp 496 is going to put out a massive amount of torque, probably well in excess of 500 lb ft. My vote is for a 4L80E, if you have the money. One of those will not come cheap but should certainly be capable of handling the power. I believe you can get one from Hughes in the $2400 range but dont quote me. Last time I checked I believe aftermarket lockup torque converters for them were in the $700 range and an independent tranny controller was between $600 and $1200. They have the same gearing as a TH400 does and I think OD is around .76. I'm sure one of the tranny gurus in this forum could clue you in a little more on the details of one.
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Old 02-22-2006, 08:20 PM
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I vote for the 200R4 too. Its light, cheaper to buy from Bowtie overdrives ($1325), has the right gearing, easy to install. The stage 3 is good to over 500 horse. Check it out.
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  #20 (permalink)  
Old 02-23-2006, 02:06 PM
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I am toying with the Idea of putting a 427 in my Impala 3900 lbs with a 2.73 rearend I will use a Powertrax in the rear end
I was looking at a XE268 Comp, Performer RPM, and Either a Holley or Demon 750
Vac secondary, 1 3/4 Headers with 3" X piped Duals with Dual cats, and turbo Mufflers.
I was looking at a 700-r4 or Possibly a 200-4r to recoup some mileage
current setup is 305 TH350 with a Demon 500 cfm and it only pulls high 9-low 10 mpg Carb is too big and looses signal and performance down low.
what will work best with this package?
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  #21 (permalink)  
Old 02-24-2006, 07:37 AM
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7004r

I have a 406sbc now putting out over 450 hp with a stage 2 7004r from CK performance on the east coast, he ships worldwide, you may not buy from hom but check out his web site he has a great article on 7004r and he sells a great manual to build it up at home, www.ckperformance.com ask for chris, tell him i sent you
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  #22 (permalink)  
Old 02-24-2006, 10:22 AM
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Quote:
Originally Posted by rick458
I am toying with the Idea of putting a 427 in my Impala 3900 lbs with a 2.73 rearend
what will work best with this package?

The 2.73 is way too high for that heavy car and that cam, especially with an OD. With that combo you'll be turning 1500 RPMs at 65. Way too low. Peak cruise efficiency with that cam will probably be around 2200. 3.42 or 3.73 is a bit better match with OD.
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Old 02-24-2006, 12:38 PM
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So it sounds like I need to build a stage 3 2004R, if it has the same ratios as a TH-350/400 than that'll work out better for my gearing.
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Old 02-27-2006, 06:49 PM
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That 200-4R looks nice, but I went to that site (phoenixtrans.com) and their strongest 200-4R is rated at 350HP

Quote:
#PT2004RSS
Street/Strip trans features modified pump, clutch packs, and servos for up to 350hp, street/strip torque converter comes with heavy duty clutch, fully tig welded construction and full needle bearings, stall speed available to 2600rpm. $1595.00
Is there a way to build one up stronger than that one? Will it cost a lot more?
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Old 02-27-2006, 08:55 PM
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Quote:
Originally Posted by Jmark
I vote for the 200R4 too. Its light, cheaper to buy from Bowtie overdrives ($1325), has the right gearing, easy to install. The stage 3 is good to over 500 horse. Check it out.
Here is the link again for the 500hp 200R4.
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  #26 (permalink)  
Old 02-27-2006, 08:58 PM
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Thanks man.
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Old 02-28-2006, 02:04 PM
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7000r4

Ive got the combo in my 67 pickup it works most exellent my set up has 373 gears & a 275/60 28" tall I blew the 1st trans up but spent the money and had it pro built it has hi/pro cluthes & valve body w/shift kit it comes out of the hole hard and still runs down the hiway at 70 all day Id run it again and plan to in the 52
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  #28 (permalink)  
Old 02-28-2006, 05:27 PM
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Gear ratios

I run a 700r4 behind a 500+hp 427. Hardened internal parts are a must and the after market valve that allows the converter to remain locked up through 3/4 throttle is a must.I run 373 gears and 31 inch tires but my truck weighs 6000lb. I consulted a gear ratio chart that shows what size tires to what gears to match with desired rpm.www.4wheelparts.com has a good one that provides the information you need.Good Luck and have fum with your project.
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  #29 (permalink)  
Old 02-28-2006, 05:30 PM
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Everything you need for your 700R

http://www.converter.cc/
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