Kimme
Member
Registered: 30th Nov 05
User status: Offline
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Down the line i am planning on modifying my GSi and making it turbo... i've got a plan set out for everything, except the gearbox..
The way i'm modifying the internals, means that it will be really easy to get some serious power out of the engine when i can afford a bigger turbo.. 
Now.. when it comes to gearboxes, are there any that will match straight up with the x16xe? Maybe the F20?
Just anything that will allow me to get the torque outta the box without the worry of killing it...
Suppose i can always wait til i kill the box then figure something out, but females like to plan ahead you see!
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Stu
Member
Registered: 3rd May 00
Location: Madchester UK Drives: 2014 BMW M135i
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Id just rebuild yours using straight cut quaife internals and diff!!!
Will whine like a banshee!!!! 
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Robin
Premium Member
Registered: 7th Jan 04
Location: Northants Drives: Clio 182 Cup
User status: Offline
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F17, from an Astra is the strongest smallblock box you can get.
thats rated up to 170lb/ft.
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Jambo
Member
Registered: 8th Sep 01
Location: Maidenhead, Drives: VXR Arctic
User status: Offline
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i cant remember weather F25 was big or small block?
Maybe that?
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Robin
Premium Member
Registered: 7th Jan 04
Location: Northants Drives: Clio 182 Cup
User status: Offline
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big Jambo.
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Jambo
Member
Registered: 8th Sep 01
Location: Maidenhead, Drives: VXR Arctic
User status: Offline
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Wont fit on a LET though thats why i was confused  Something to do with bellhousings?
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Tom
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Registered: 3rd Apr 02
Location: Wirral, Merseyside
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Go for the straight cut, I must say though I hope you're doing the turbo conversion properely. Never heard of a 16xe with big turbo and big boost/power living
[Edited on 31-10-2006 by Tom]
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Dave A
USER UNDER INVESTIGATION - DO NOT TRADE
Registered: 10th Dec 03
Location: County Durham
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can I be the first to say:
unless you have LOADS of cash to spend on doing a turbo conversion properly, dont bother.
get Tb's instead.
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Rob H
Member
Registered: 28th Oct 00
Location: Staffordshire Drives: Astra SRi
User status: Offline
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quote:
Originally posted by Dave A
unless you have LOADS of cash to spend on doing a turbo conversion properly, dont bother.
get Tb's instead.
Surely it depends what power you want though? To gain full advantage of TB's you really should upgrade the pistons to pocketed ones, which allows you to run much wilder cams.
The only reason TB's are "cheaper" is that you can do it in more stages, whereas a turbo conversion has to be done together before any reliable benifits can be made.
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Robin
Premium Member
Registered: 7th Jan 04
Location: Northants Drives: Clio 182 Cup
User status: Offline
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a turbo conversion done properly will need low compression pistons anyway, so it'll cost just as much as a tb set up.
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Rob H
Member
Registered: 28th Oct 00
Location: Staffordshire Drives: Astra SRi
User status: Offline
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quote:
Originally posted by Robin
a turbo conversion done properly will need low compression pistons anyway, so it'll cost just as much as a tb set up.
That's what i'm trying to say .
The benifits of a turbo though are that you don't need to start uprating the head, valvetrain, and most moving parts to cope with the increased engine speeds needed to extract the power. The problem with a turbo is heat dissipation/absorbtion, which with the aid of decent sized intercooler, and venting etc is easier to sort than an engine that wan't to shake itself to pieces cause it's going 30% faster than it was desinged too!
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Kimme
Member
Registered: 30th Nov 05
User status: Offline
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Hehe, I realise this will cost me a fortune, but it's sorta like a project to me, things will be done in stages.
First things i'm gonna be doing are pistons and conrods. Not sure about the crank, i've heard people say they can take a lot! Only upgrades i've found for them are lightweight ones. 
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Robin
Premium Member
Registered: 7th Jan 04
Location: Northants Drives: Clio 182 Cup
User status: Offline
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yeah, the standard crank will be fine, as long as you don't rev to more than 9500 rpm
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Dave A
USER UNDER INVESTIGATION - DO NOT TRADE
Registered: 10th Dec 03
Location: County Durham
User status: Offline
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quote:
Originally posted by Robin
a turbo conversion done properly will need low compression pistons anyway, so it'll cost just as much as a tb set up.
I costed up a proper turbo conversion for the x16xe. it would cost around £5k to be done properly
turbo and manifold: £1000
low comp forged pistons: £600
arp rod bolts: £100
SDB rollers: £100
pipework: £300
intercooler: £250
mantzel inlet: £500
headwork: £250
exhaust: £300
aftermarket management: £600
Loom: £300
Mapping: £400
and thats based on doing EVERYTHING yourself exept the mapping and headwork. then theres costs like gaskets and other bits. I wouldnt expect more than 170bhp either.
for £5k you could build a 200 bhp tb'd x16xe which will be reliable and more fun
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Corsa E-Tec
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Registered: 4th Feb 04
Location: Stevenage Drives: Leon Cupra
User status: Offline
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as dave say's to do it properly is big cash, i added it up when i was gonna do mine and it cam in at 3500 without mapping, gaskets and other bits and peices.
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Cybermonkey
Member
Registered: 22nd Sep 02
Location: Sydney, Australia
User status: Offline
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if you are after a strong smallblock gearbox, go for the F17. nice ratios, found in many vauxhalls, and its tough as nails. an ausie holden barina has been using the original gearbox on a 330bhp turbo Z18XE for quite a while now and its just fine
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