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BTR 4 speed with boost
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madeaspack
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PostPosted: Fri May 16, 2008 8:53 am    Post subject: BTR 4 speed with boost Reply with quote

i guess this post should be here not in drivelines...
how good will a BTR 4 speed with shift kit be taking 15psi,i currently have a t5 but want to go auto,im in no hurry as the t5 is handling it.but i can get a cheap 4 speed auto conversion,so will this be ok?as opposed to a full manual c10(no overdrive)
cheers
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schnoods
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PostPosted: Fri May 16, 2008 10:07 am    Post subject: Reply with quote

The BTR box can handle a fair bit of grunt, depends from which vehicle though.

The XR6T seems to be the strongest, though 15 psi is pushing it. But boxes are cheap too, would be cheaper to replace one every couple of months than beef one up.

the C4, C6, C10 gear boxes are much easier to make stronger and handle the grunt with ease, if you have one on hand, I'd be going that route.
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madeaspack
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PostPosted: Fri May 16, 2008 11:51 am    Post subject: Reply with quote

i dont have a C10 is the thing and i want overdrive so prefer the btr but i want it to be tough enough.it'll just be from an ef base model
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edfairmont4.0
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PostPosted: Fri May 16, 2008 12:27 pm    Post subject: Reply with quote

get a tough rebuild i got quoted 1400 for a rebuild with kevlar bands and some other goodies
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madeaspack
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PostPosted: Fri May 16, 2008 12:41 pm    Post subject: Reply with quote

on a btr?can you make them full manual?
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edfairmont4.0
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PostPosted: Fri May 16, 2008 1:07 pm    Post subject: Reply with quote

with some very good computer work im sure you could. IE. remove kickdowns etc...
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EBXR8380
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PostPosted: Fri May 16, 2008 2:09 pm    Post subject: Reply with quote

If you go 3 speed ... A 3.08 diff brings ratio's pritty much back to overdrive specs... The MASSIVE torque a turbo produces won't effect performance.. Especially with 2500 or so converter...
The XR6T has bigger oil pump and different valve body... So figure what's required ???
BIG trans cooler helps...
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madeaspack
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PostPosted: Fri May 16, 2008 2:54 pm    Post subject: Reply with quote

i hadnt considered 3 speed and changing diff ratios,that helps my thaughts a bit,maybe i should start looking for a C10
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sly
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PostPosted: Fri May 16, 2008 4:14 pm    Post subject: Reply with quote

A 3.08 is well wide of the mark. A 3.45 diff with 0.68 overdrive gives overall gearing of 2.346. Closest a*** I know of is the A9X 2.6, maybe you might find a 2.5 in a 9" conversion.

Depending how hard you plan to thrash it, a toughened BTR could be like a fuse, or it could give years of trouble-free operation. Up to you. If you look like spending $4-5K on tranny and final drive, a T56 conversion at $7K might be worth the stretch.
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glenneaux
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PostPosted: Fri May 16, 2008 5:24 pm    Post subject: Reply with quote

oi chris you can have the BTR out of my EBII for cheap if you want icon_razz.gif

its been sitting around at home for a while, i think it only needed a service but if you're gonna beef it up then thats a given
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FairmontXR6
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PostPosted: Fri May 16, 2008 5:32 pm    Post subject: Reply with quote

EBXR8380 wrote:
If you go 3 speed ... A 3.08 diff brings ratio's pritty much back to overdrive specs... The MASSIVE torque a turbo produces won't effect performance.. Especially with 2500 or so converter...
The XR6T has bigger oil pump and different valve body... So figure what's required ???
BIG trans cooler helps...


So by this post are you saying that the BA XR6T 4spd auto fits behind the EL, I assumed that, but have never heard it confirmed. If so, could he get the ef box and get it rebuilt to BA XR6T specs, or better?
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FairmontXR6
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PostPosted: Fri May 16, 2008 5:39 pm    Post subject: Reply with quote

To answer my own question, apparently not
http://www.fordmods.com/forums/viewtopic.php?t=64790&highlight=

icon_redface.gif

I only asked becasue i wanted to try a tough auto for my car, plus i was not sure if EBXR8380 had notice that madeaspack has an EL in the sig
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Mr.Kiss
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PostPosted: Fri May 16, 2008 6:33 pm    Post subject: Reply with quote

EBXR8380 wrote:
The XR6T has bigger oil pump

In the BA 4spd the oil pump did change, but it actually flows less oil, when I get my gear box re-built in july I'm getting an AU oil pump fitted as acording to my tuner and the shop re-building my box the pre BA pumps flow better and are more reliable.. I'm also getting BF clutch packs, new kevlar bands and cryo'ed AU panimetric gears fitted..
This box should handle 300rwkW pretty easy with the right tune for it, unlike the CAPA generic tune that probably shortened the life of my current box by about one year or more...

Hope that helps
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badcooky
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PostPosted: Fri May 16, 2008 8:23 pm    Post subject: Reply with quote

Any BA 6 4speed auto will do as they're all the same the BTR 93LE.
The older C series are tougher but they can show their age,the trade off is that they can handle grunt and can be tricked up.
BA auto's can handle a bit,the boys at Auto-tech have only killed one in their 460rwkw Turbo and the replacement is basically stock and is still going well after a couple of years.
Build something up untill the T5 goes pop.
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madeaspack
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PostPosted: Sat May 17, 2008 1:03 pm    Post subject: Reply with quote

im gonna build something up until the t5 gives up,and if iv built something before the t5 gives up i'll sell the t5 conversion.i personally dont think the t5 will break,its outlasted my expectations already and is still perfect.

how much glenneaux??
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twason
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PostPosted: Sat May 17, 2008 1:11 pm    Post subject: Reply with quote

badcooky wrote:
Any BA 6 4speed auto will do as they're all the same the BTR 93LE.
The older C series are tougher but they can show their age,the trade off is that they can handle grunt and can be tricked up.
BA auto's can handle a bit,the boys at Auto-tech have only killed one in their 460rwkw Turbo and the replacement is basically stock and is still going well after a couple of years.
Build something up untill the T5 goes pop.
There are some differences that make a retrofit into anything other than a B series non straight forward, after three attempts at a BA auto into my EF I have given up.
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EBXR8380
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PostPosted: Sat May 17, 2008 2:06 pm    Post subject: Reply with quote

Ha we have BA bellhousing adapted to C4 on our ED Fairmont...
Talk to Toni Dominello [02] 9651 5803 He specialises in auto conversions, torque converters...
A 3.08 final drive would suffice and be a performance ratio.. The std 3 speeds run 2:7 / 2,9's... So 3.08 with bigger dia tyres would be the go... Besieds the lock up converter on BTR would NOT take the torque ...
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madeaspack
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PostPosted: Mon May 19, 2008 7:43 am    Post subject: Reply with quote

does a ba bell housing bolt up yo e series,or au,i have an au engine.did you have to get a custom made torque convertor for the c4?
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twason
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PostPosted: Mon May 19, 2008 7:47 am    Post subject: Reply with quote

madeaspack wrote:
does a ba bell housing bolt up yo e series,or au,i have an au engine.did you have to get a custom made torque convertor for the c4?
Won't bolt up completely to an E series but will on B and A series.
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EBXR8380
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PostPosted: Mon May 19, 2008 6:08 pm    Post subject: Reply with quote

twason wrote:
madeaspack wrote:
does a ba bell housing bolt up yo e series,or au,i have an au engine.did you have to get a custom made torque convertor for the c4?
Won't bolt up completely to an E series but will on B and A series.


Yes in our case we have an AU engine in ED and originally BTR then we fitted an XR6 EF 5 speed.. The lower bolts required drilling to accept sump ...
So fitting BA b/housing may have already been sorted...
The 9 " torque converter is from Commodore fabricated to fit Ford crank.. The flexplate was redrilled to accept the 3 bolt converter..
This is a C4 conversion...In this case tho...
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