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727's and power? #2043934
04/01/16 10:20 PM
04/01/16 10:20 PM
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back in Georgia
dthemi Offline OP
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Just curious about how much power people are racing 727's with.

I'm asking because I may put one of my predator motors in front of one, in a 3400 pound car. The motor makes 1200 on a single 4, and the trans is built pretty strong for a 727. Billet aluminum steel shell drum, billet rear drum, Griner brake, aftermarket input and output shafts,5 pinion planet, roller, billet servos ect with billet front coan converter. I know there are other things that can be done to make them stronger, but if I have to spend 10 more cent's on this 727 I'm going to get another glide.

So in short this time, are any of you guys beating on one with that, or higher power with the trans mods I mentioned? Just don't want to scatter a good trans for no reason, and I've never put that much on one personally. Thanks.

Re: 727's and power? [Re: dthemi] #2043938
04/01/16 10:24 PM
04/01/16 10:24 PM
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baldwinsville new york
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a493demon Offline
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I have put over a 1000 to one.
This year it will get close to 1500 so we shall see.

Re: 727's and power? [Re: dthemi] #2043943
04/01/16 10:29 PM
04/01/16 10:29 PM
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Milwaukee WI
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TRENDZ Offline
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I had one hold up real well built similarly behind my turbo car. Made around 1100hp 3700lb with me sitting in it. 3.50 gear with a 31w tire. Probably a lot more tq than the pred motor, not as much hp. I had a very low rpm staging strategy that probably was easy on the trans.
That said, if you can get your money out of it to get a glide...


"use it 'till it breaks, replace as needed"
Re: 727's and power? [Re: dthemi] #2043949
04/01/16 10:40 PM
04/01/16 10:40 PM
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dthemi Offline OP
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There's no way out of a 727 financially lol, or any other race trans for that matter.

For sure your turbo was making way more tq. I'll have to bang 1st hard to get this tub moving.

I only have time to swap motors, and get headers made if I'm going to race this car this summer. Having to swap trans to a glide along with the motor will take even more time I don't have. My choice is either leave it alone with the PG hemi, and 727. Or swap to a pred, and keep the 727 in place.

Re: 727's and power? [Re: dthemi] #2043955
04/01/16 10:45 PM
04/01/16 10:45 PM
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Milwaukee WI
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TRENDZ Offline
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I really wouldn't worry about the trans durability. All the weak links are addressed in the trans parts you have. If you trust the builder, the parts will do what you need them to do.


"use it 'till it breaks, replace as needed"
Re: 727's and power? [Re: dthemi] #2043956
04/01/16 10:46 PM
04/01/16 10:46 PM
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dthemi Offline OP
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It leaves ugly, but power should help it. Here's it going 5.56 with the PG 572 hemi.

https://www.youtube.com/watch?v=fG23Iwdy1Q0

Re: 727's and power? [Re: TRENDZ] #2043958
04/01/16 10:47 PM
04/01/16 10:47 PM
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dthemi Offline OP
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Originally Posted By TRENDZ
I really wouldn't worry about the trans durability. All the weak links are addressed in the trans parts you have. If you trust the builder, the parts will do what you need them to do.


Good, then if it works, I'll spray it too.

Re: 727's and power? [Re: dthemi] #2043962
04/01/16 10:51 PM
04/01/16 10:51 PM
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Milwaukee WI
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TRENDZ Offline
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Really like the looks of that car!


"use it 'till it breaks, replace as needed"
Re: 727's and power? [Re: dthemi] #2044090
04/02/16 12:56 AM
04/02/16 12:56 AM
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North Alabama
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I would put a Turbo 400 in it and hope some sucker would buy that high dollar 727.........LOL!!!!

Re: 727's and power? [Re: dthemi] #2044202
04/02/16 08:10 AM
04/02/16 08:10 AM
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Tennessee
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Hemi ragtop Offline
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Originally Posted By dthemi
It leaves ugly, but power should help it. Here's it going 5.56 with the PG 572 hemi.

https://www.youtube.com/watch?v=fG23Iwdy1Q0


That looks like Brainerd Optimist drag strip. Are you in my area?

Re: 727's and power? [Re: dthemi] #2044203
04/02/16 08:14 AM
04/02/16 08:14 AM
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back in Georgia
dthemi Offline OP
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You're right, it's Brainerd. I'm 1.5 hours south.

Re: 727's and power? [Re: Monte_Smith] #2044206
04/02/16 08:26 AM
04/02/16 08:26 AM
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dthemi Offline OP
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Originally Posted By Monte_Smith
I would put a Turbo 400 in it and hope some sucker would buy that high dollar 727.........LOL!!!!


A 400 at the same strength only costs a thousand bucks, and that's just not proper mopar economics lol

Really, id rather have a glide in it, just no time. Cross member, bell, wheel, D shaft, shifter


Last edited by dthemi; 04/02/16 08:26 AM.
Re: 727's and power? [Re: dthemi] #2044332
04/02/16 11:39 AM
04/02/16 11:39 AM
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NW Indiana
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fbs63 Offline
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I am working with John at CRT to build a 2nd gear start 727. 1.45 first gear for my twin turbo car. He already has a 2nd gear start billet valve body with the brake operable in 2nd. I have a A&A straight cut 2.45-1.45-1 gear set. You could use a 2.77-1.57-1 helical gear set to get a little more SLR if you need it.

Re: 727's and power? [Re: dthemi] #2044411
04/02/16 01:11 PM
04/02/16 01:11 PM
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KOS Offline
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wow killer car....ive been through the same situation and stayed the the 727 because it was the easiest route and ive got some money into mine too.. so i say give it a shot you own it no extra $$ to shell out for now.

Re: 727's and power? [Re: Monte_Smith] #2044683
04/02/16 08:32 PM
04/02/16 08:32 PM
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Rio Linda, CA
John_Kunkel Offline
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Originally Posted By Monte_Smith
I would put a Turbo 400 in it and hope some sucker would buy that high dollar 727.........LOL!!!!


Best advice so far.


The INTERNET, the MISinformation superhighway
Re: 727's and power? [Re: dthemi] #2044691
04/02/16 08:51 PM
04/02/16 08:51 PM
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Anoka County, MN
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Leigh Offline
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Just as a perspective.
http://www.yellowbullet.com/forum/showthread.php?t=304556&page=3
They all need $$ thrown at them.

Re: 727's and power? [Re: fbs63] #2045021
04/03/16 02:44 AM
04/03/16 02:44 AM
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Originally Posted By fbs63
I am working with John at CRT to build a 2nd gear start 727. 1.45 first gear for my twin turbo car. He already has a 2nd gear start billet valve body with the brake operable in 2nd. I have a A&A straight cut 2.45-1.45-1 gear set. You could use a 2.77-1.57-1 helical gear set to get a little more SLR if you need it.



thank you for what you are trying to do and not giving into the power guide ( taxi cab trans )

Re: 727's and power? [Re: dthemi] #2045037
04/03/16 03:34 AM
04/03/16 03:34 AM
Joined: Nov 2011
Posts: 2,154
Its a TRAP!
DARTH V8Я Offline
Oh No!! I just had a moron attack!
DARTH V8Я  Offline
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Its a TRAP!
Blew a 727 with 330hp once..

Last edited by Ice~Eagle; 04/05/16 11:37 AM.

When it takes more than a sweet mullet to prove you rule at the trailer park..
Re: 727's and power? [Re: dthemi] #2045083
04/03/16 08:01 AM
04/03/16 08:01 AM
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Aurora, Colorado
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I think with all the performance parts you can get for the 727 internals, the weak point becomes the transmission case?

The diesel guys are pushing 1,000+ HP and almost double the torque through the 48RE transmissions. I though ATS diesel was planning to cast heavy duty versions of the 48RE transmission case?

Re: 727's and power? [Re: dthemi] #2045124
04/03/16 09:59 AM
04/03/16 09:59 AM
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Posts: 3,097
back in Georgia
dthemi Offline OP
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I've put 400's, and glides in my mopars plenty of times before. I know it's the way to go, just wanted to know what people are putting on them, and having them stay together. I only have so much time, this time of year to wrench, so it's a confidence issue with planning.

After the summer it'll get a glide, and that'll be that. Just have a better motor to put in, and no time to do the extra work. Always want to go a bit faster lol.

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