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Re: Why is a turbo 400 better than a 727?
[Re: Kam*Kuda]
#1114256
11/16/11 10:47 AM
11/16/11 10:47 AM
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Joined: Apr 2004
Posts: 12,339
somwhere
smokinwoody
I Live Here
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I Live Here
Joined: Apr 2004
Posts: 12,339
somwhere
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I have a CRT built 727...it has the billet steel drum and all the other goodies..I believe its John's Super pro II trans with a trans brake..he built it for me about 6 or so years ago... I think it goes for $3,500.. and then add in the converter that will range anywhere from $850-$1,000 or have a custom built 2 piece one built for $2,500.. https://www.coperacingtrans.com/product_...e93e95960793c60and he has another one..super pro III thats about $4,000... all good stuff 
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Re: Why is a turbo 400 better than a 727?
[Re: gregsdart]
#1114258
11/16/11 01:31 PM
11/16/11 01:31 PM
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Joined: May 2004
Posts: 12,505
Taxes & Virus's R-US, NY
Dragula
I Live Here
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I Live Here
Joined: May 2004
Posts: 12,505
Taxes & Virus's R-US, NY
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Years ago, the 727 never held up well on a trans brake. Guys who ran weekly and made as many as 6 or more passes a night on it needed it to last on the trans brake, and the T400 does that. Now with that said, jump ahead to present day, and there are some good parts out there for the 727 these days. No trans will be maintenance free at those Hp levels, and not with the kind of torque and weight your talking about. I would still go Lenco, and seems your in the ball park...
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Re: Why is a turbo 400 better than a 727?
[Re: gregsdart]
#1114259
11/16/11 01:40 PM
11/16/11 01:40 PM
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Joined: Oct 2006
Posts: 4,590
Indy
joshking440
Lunch is on me!
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Lunch is on me!
Joined: Oct 2006
Posts: 4,590
Indy
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Quote:
Quote:
Quote:
if you say you will NEVER put a GM trans in your mopar, than you are never going to have a fast mopar...
"fast" must mean in the low sevens. 
Fast means low 8s or better....and lets not forget we all fight the same issue that tears up our stuff...weight.....my car is 3675....thats hard on everything
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Re: Why is a turbo 400 better than a 727?
[Re: Dragula]
#1114260
11/16/11 01:44 PM
11/16/11 01:44 PM
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Joined: Jun 2007
Posts: 2,646
Plymouth Meeting, PA
bigtimeauto
Trophy Winner
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Trophy Winner
Joined: Jun 2007
Posts: 2,646
Plymouth Meeting, PA
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how about the turbo 400 has better converter choices? I couldn't even get a converter for my car with the 727 unless i made some concessions.
As for the intermediate aluminum drum your not going to see it in the et but it will put less strain on the clutch pack on the 1-2 shift when that drum has to stop spinning. I don't know how much power your car makes but a pretty much stock pre 1968 turbo 400 will live thru 1200 hp no problems (as long as its a quality rebuild with the correct clearences and clutches). All of the *built* ones just have the bigger sprag and drum the earlir ones had. Also if your going to use a ultra bell on the front of it you need to find a 8 bolt pump case/core to build your trans.
After 12-1500 hp you can buy the good shafts and drums but you still will be cheaper than a lenco anything except the cool factor.
BB, TT5,Procharged 3300lb Street Car 4.79/154
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Re: Why is a turbo 400 better than a 727?
[Re: bigtimeauto]
#1114264
11/16/11 03:21 PM
11/16/11 03:21 PM
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Joined: Jun 2008
Posts: 577
Arkansas
Adrielp
mopar
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mopar
Joined: Jun 2008
Posts: 577
Arkansas
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My question is, how do they get the chrysler transmissions to hold good power in comp eliminator? Lots of engines over there are in 1000-1200HP range. Also, in that same case, they perfect their converters so why are they not limited? Lots of them are being used in gm and chrysler applications
Adriel Paradise
Substation Design Engineer III
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Re: Why is a turbo 400 better than a 727?
[Re: Adrielp]
#1114265
11/16/11 03:53 PM
11/16/11 03:53 PM
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Joined: Dec 2009
Posts: 21,299
in a cattle trailer down by th...
Guitar Jones
Paddle faster! I hear banjo music!
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Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 21,299
in a cattle trailer down by th...
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Quote:
My question is, how do they get the chrysler transmissions to hold good power in comp eliminator? Lots of engines over there are in 1000-1200HP range. Also, in that same case, they perfect their converters so why are they not limited? Lots of them are being used in gm and chrysler applications
With a thick midplate you could probably get any converter you want to fit in there. Those Comp trannies use a thick spacer for an adapter.
"Come get your wife"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
'74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Front and rear disc and hydroboost conversion.
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: Why is a turbo 400 better than a 727?
[Re: Adrielp]
#1114271
11/16/11 09:36 PM
11/16/11 09:36 PM
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Joined: Feb 2004
Posts: 1,093
Long Beach, CA
Mike Swann
super stock
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super stock
Joined: Feb 2004
Posts: 1,093
Long Beach, CA
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Quote:
My question is, how do they get the chrysler transmissions to hold good power in comp eliminator? Lots of engines over there are in 1000-1200HP range. Also, in that same case, they perfect their converters so why are they not limited? Lots of them are being used in gm and chrysler applications
3 words; Dave Smith Protrans.
I am about ready to start a 2300HP TF with him. Why? because the last trans I bought from him has 600 runs on it, one rebuilt, clutches only. This is with 1000 ft-lbs of torque, going in. I can tell when its time to rebuild by the 1/2 shift data trace.
Putting it another way, how many of you guys get your 10 inch superduty converter stall speed to 7500 rpm?
8.30's @3400 lbs
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Re: Why is a turbo 400 better than a 727?
[Re: turbobitt]
#1114272
11/20/11 12:21 PM
11/20/11 12:21 PM
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Joined: Aug 2010
Posts: 167
mi
dirty magnum
member
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member
Joined: Aug 2010
Posts: 167
mi
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Quote:
To bullet prof a TH400, your looking at a direct drum with super sprag $680, plus billet input shaft $300, plus all the other normal expense.
Almost forgot about billet intermediate shaft $230. Just as expensive I think...
Allan G.
you only need to change the sprag in a turbo 400 and it will handle 1000hp and live on the street.
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Re: WHy is a turbo 4oo better than a 727?
[Re: HEMIFRED]
#1114274
11/20/11 01:37 PM
11/20/11 01:37 PM
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Joined: Feb 2006
Posts: 698
Alberta Canada
Edge
mopar
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mopar
Joined: Feb 2006
Posts: 698
Alberta Canada
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yesterday's news or should we say racing transmisson now it's as P/G with a lock up converter is replacing Lenco and Bruno drives. Huges and ATI both have a version can hold 3,000 hp snd much lighter than Lenco Quote:
Not so sure the Lenco is yesterdays racing transmission quite yet. True the new PG's are lighter (my 4 speed lencodrive is very heavy) and have recently been upgraded to handle more Hp, but in my opinion it is not Hp that breaks transmissions it is torque and tire shake, While some of the nitrous car are changing I am not aware of that the supercharged cars have made the move away from the Lenco atleast at this point in time. But I could be wrong. Regardless it is impressive how much power these new generation glides/400's can handle.
Back to the main subject regarding the 727, as stated above a good strong transmission can be built but the availability of different gear sets is real limitation for higher hp applications.
76 Duster
work in progress
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