Gearbox Question
Hi is there any way i can strenthen the BC box so it can take alot more power/torque without doin the conversion to a different box?
cheers |
no , it will strip the gears
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use can use mk6 escort diesel box, little bit better.
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what power will the diesel box take?
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diesel box is the same lads, diferent ratios thats all
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Originally Posted by luke19790_3
(Post 5510641)
use can use mk6 escort diesel box, little bit better.
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Best bet fit a MTX
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Originally Posted by Mids_s2
(Post 5510514)
Hi is there any way i can strenthen the BC box so it can take alot more power/torque without doin the conversion to a different box?
cheers |
Originally Posted by chaffe
(Post 5510696)
diesel box is the same lads, diferent ratios thats all
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Yes it's an IB5 and yes they are a bit stronger, not massively so but better than nothing.
Diesel or not is irrelevant, any IB5 will be an improvement over the BC. |
You can buy 6 speed IB5 boxes with different gears and LSD etc. costly.. which is why the MTX75 is the best value for money gearbox option.
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What sort of power and torque level is loosely regarded as ''safe'' with a ib5 plus diff before you need to be looking at changing up to a MTX75 ?
Can a ib5 happily run say 250 - 270bhp ? |
Christian ran 350bhp through an IB5 and it was fairly reliable, he also fitted a drain plug so the oil could be changed regularly and easily.
I've been running 240bhp through one for the last year and not broken it, this is after breaking four BC box's. |
get a shot peened cryo box, £1200 with an ATB fitted
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What power can the standard box handle? i hope 160-180 ? else i have to look for another one ..
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Originally Posted by Sjieter
(Post 5556654)
What power can the standard box handle? i hope 160-180 ? else i have to look for another one ..
Standard BC box was built for ~190 Nm torque Standard IB box was built for ~195 Nm torque There are rumours about diesel boxes being stronger, but I've not seen any proof yet... well some diesels had MTX boxes fitted. They're built for more torque than the BC/IB5 boxes. A friend of mine usually broke two gearboxes with his S1 (1850 CVH, WM management, T34) during one summer season. |
Originally Posted by 2ndGear
(Post 5556638)
get a shot peened cryo box, £1200 with an ATB fitted
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Originally Posted by Dennis_Wiseman
(Post 5556610)
What sort of power and torque level is loosely regarded as ''safe'' with a ib5 plus diff before you need to be looking at changing up to a MTX75 ?
Can a ib5 happily run say 250 - 270bhp ? |
Originally Posted by stuart collins
(Post 5556690)
ive run 330bhp through a standard box then changed to a uprated 1 which let go , its luck of the draw some will take it, some will let go at 200bhp
Maximum power i want to run is 300 and the car for mainly road use which the boost would be turned down for and the odd quarter mile when it would be whacked up haha |
rs turbo bc standard rebuilt box, up to u but a rebuilt rs turbo box with diff is goin to be 1200-1400 dependind on which diff , my last 1 with gripper last 5miles , i would but that money 2wards a mtx conversion theres abox in the for sale room
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Speaking of diffs running an ATB will break your box easier IMO, it's a very harsh diff, I now run a Racing Puma Viscous LSD which is much 'smoother' although it doesn't give quite as much grip as my old ATB it's a good compromise.
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How do you tell the difference between the B5 and the IB5? Can the standard LSD be reconditioned?
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IB5 has more webbing on the casing to prevent flex, it also has a core plug behind the main shaft bearing that can be seen when out the car.
Yes the RST LSD can be reconditioned. |
Originally Posted by Karlos G
(Post 5557320)
Yes the RST LSD can be reconditioned.
A friend of mine opened his to see what's inside and can't put it back together now :wall::wall::wall::wall::wall: |
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Originally Posted by XR2
(Post 5557331)
where? who?
A friend of mine opened his to see what's inside and can't put it back together now :wall::wall::wall::wall::wall:
Originally Posted by boost monster
(Post 5558019)
Is this an IB5
http://i166.photobucket.com/albums/u...gearbox003.jpg |
Bugger
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I got a six speed box to do the conversion in knowing to me the rest of it costs an arm an a leg. bummer! might just go for mtx??
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i converted my mk2 fiesta zetec turbo to run a mk1 focus rs gearbox.
what it cost me (sort of i broke a mk1 focus so got the box cheep) box expect to pay £600 shafts £200 a set (you can use different shafts but i used the rs ones) lincage £50 hydro clutch conversion and gearbox mount £140 clutch and flywheel (second hand £150 if your lucky) i had to space my engine forward 15mm. I cut the inner chassie leg to make room for the box had to make a back mount i used the standard mount and worked from there. as for the shafts i had some sleves made up (if any one wants some made, same as the mount and clutch conversion i can point you in the right direction) so that i could slot a mk2 xr2 shaft in one end and a focus rs shaft in the other cut them to the right lenth then welded them. i ran the shafts at 15psi (260hp) but have now sent them off to be made into one piece shafts |
2 Attachment(s)
Originally Posted by Karlos G
(Post 5557320)
IB5 has more webbing on the casing to prevent flex, it also has a core plug behind the main shaft bearing that can be seen when out the car.
Yes the RST LSD can be reconditioned. Attachment 35354 Attachment 35355 This is mine. I was told it was an escort diesel box. From my research Im hoping it is an MTX??? It is hydraulic clutch, and operated by a shifter linkage. cheers |
Do you have any better pictures?
The mtx has the rod linkage to the left where the ib5 is on the right |
3 Attachment(s)
Originally Posted by luke19790_3
(Post 6585980)
Do you have any better pictures?
The mtx has the rod linkage to the left where the ib5 is on the right Heres a couple more, looks like the rod linkage is on the RHS...? Attachment 35347 Attachment 35348 Attachment 35349 The box will be coming out on monday but Im trying to prepare for the worst ££.....!!! |
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Originally Posted by luke19790_3
(Post 6586069)
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https://cimg2.ibsrv.net/gimg/passion...ceb2d72a15.jpg
I have a rs2000 box in mine fitted with frs lsd |
Thanks mate. How easy was it to fit the FRS LSD? what did you have to change? driveshafts? I am going to compare mine very closely to this photo later tonight if I can get it out, which I am planning to do shortly
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It looks very very much like mine this does, it gives me big hope mines an MTX!!! Will know shortly
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3 Attachment(s)
Right, I've got it all out today. It's an MTX, looks identical to yours mate :top:
Attachment 35216 Attachment 35217 Attachment 35218 Ignore the large steel bracket on the left of the pic (its for clutch slave cylinder mounting) and also the rod linkage shown on the other picture. I will be reusing that for the new box. SO, what are my options? If I have a focus RS box, can I swap the internals out and put them in this? Are the gears shotpeened in the RS focus box? is the LSD and easy swap into this case? If I use current case then I could use current speedo etc? thanks |
As an update to this. I am buying an RS focus box.
I am hoping the ratios will be good, I am guessing they will... I have no idea how I will get the speedo working, I also am hoping I can use my shifter rod linkage mechanism as the cable setup will be a right pain to customise for a non Ford FWD car I think... Anyone? |
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