mwg
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Registered: 19th Feb 04
Location: South Lakes
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wots the difference between 5 speed gearbox and 6 speed gearbox apart from the extra gear so I mean which is better for top speed and which is better for acceleration? and which engines can u link a 6 speed to? Also best engine and gearbox combo in a Corsa?
Just thought it would make an interesting thread 
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simonp
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Registered: 12th Jan 01
Location: Portishead Drives:Nissan 300ZX Twin Turbo
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Depends what 5 speed you're talking about. F28 6 speed has similar ratios to the F20 as found in Cav GSi's, Astra GTE 16v's etc. But has the 6th gear for cruising. This is basically the same final drive as you'd find in any wide ratio gearbox. So at the end of the day, you have all the benefits of a close ratio box (deisgned to keep the power in the power band) and that nice 6th gear for motorway cruising.
You can fit it to any big block engine, so is a nice compliment to an XE or LET.
You can fit it to a small block engine, but then you'd have problems with engine geometry. You'd need to make some offset engine mounts to shift the the whole lot over so that the drive shafts will fit.
It's a practice used when fitting an F28 to a C25XE (2.5 V6).
[Edited on 07-05-2004 by simonp]
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mossy
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Registered: 22nd Jan 04
Location: Manchester Drives: GSi
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1 GEAR
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mwg
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Registered: 19th Feb 04
Location: South Lakes
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quote:
Originally posted by mossy
1 GEAR
I allready said apart from that fool
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mwg
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Registered: 19th Feb 04
Location: South Lakes
User status: Offline
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quote:
Originally posted by simonp
Depends what 5 speed you're talking about. F28 6 speed has similar ratios to the F20 as found in Cav GSi's, Astra GTE 16v's etc. But has the 6th gear for cruising. This is basically the same final drive as you'd find in any wide ratio gearbox. So at the end of the day, you have all the benefits of a close ratio box (deisgned to keep the power in the power band) and that nice 6th gear for motorway cruising.
You can fit it to any big block engine, so is a nice compliment to an XE or LET.
You can fit it to a small block engine, but then you'd have problems with engine geometry. You'd need to make some offset engine mounts to shift the the whole lot over so that the drive shafts will fit.
It's a practice used when fitting an F28 to a C25XE (2.5 V6).
[Edited on 07-05-2004 by simonp]
thats sounds good then. still have the acceleration but get a good cruising gear too for motorways. the Vaux gearboxes arent as clunky and shit as the Ford ones are they? cos every Ford Ive been in (including my cousins ST170) is really noisy and clunky. sound shit!
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simonp
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Registered: 12th Jan 01
Location: Portishead Drives:Nissan 300ZX Twin Turbo
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No, I've never got on well with Ford gearboxes. The term 'Stirring custard' springs to mind. But then again, Ford Owners think the same about the Vaux boxes.
The F28 feels the same as any normal gearbox, reverse can sometimes be a total bitch to select though. Never understood why that is though.
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clarkie
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Registered: 24th Jun 03
Location: Nuneaton Drives:1.4 sport
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it'd be cause reverse has no syncro mesh i guess
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simonp
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Registered: 12th Jan 01
Location: Portishead Drives:Nissan 300ZX Twin Turbo
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Very very few gearbox's have syncromesh in reverse. Ford's MTX75 gearbox has it, but no gearbox in any Vauxhall has syncro in reverse.
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Mattb
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Registered: 2nd Feb 03
Location: Under your sisters bed
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There is also the F16 off the cav sri 8v, fits to the Xe (and let if you fancy blowing the box up) shorter ratios than the f20, but gives a lower top end
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miles
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Registered: 25th Mar 02
Location: plymouth Drives: Astra Sport
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The 6 speed box is a fair bit heavier, obviously its for 4x4 as standard but can be converted easily. You'll also loose more power through the F28.
No idea how you'd fit it to a small block, you'd need a adapter plate and all sorts. Would also need big block drive shafts.
F28 = about £350
F20 = about £50
F28 will take much more power without a problem.
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Ian
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Registered: 28th Aug 99
Location: Liverpool
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Both boxes can handle the output of a standard XE without problem. The F28 may be that little bit tougher but at 5-10 times the price I'd stock up on F20s myself.
There's also a chap in Redline this month who has fitted one to a normally aspirated 2 litre and said it was all wrong and he planned to change it to F16.
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ainsley_brader
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Registered: 24th Mar 02
Location: Tattershall, Lincolnshire
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quote:
Originally posted by simonp
Very very few gearbox's have syncromesh in reverse. Ford's MTX75 gearbox has it, but no gearbox in any Vauxhall has syncro in reverse.
Vauxhall frontera
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simonp
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Registered: 12th Jan 01
Location: Portishead Drives:Nissan 300ZX Twin Turbo
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Technically the Frontera is an Isuzu Rodeo. 
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Adam-D
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Registered: 11th May 02
Location: Cheshire
User status: Offline
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quote:
Originally posted by simonp
No, I've never got on well with Ford gearboxes. The term 'Stirring custard' springs to mind. But then again, Ford Owners think the same about the Vaux boxes.
The F28 feels the same as any normal gearbox, reverse can sometimes be a total bitch to select though. Never understood why that is though.
i own a mondeo a corsa and marc has a fiesta
the corsa is nice and direct the fiesta is a little stodgy and the mondeo is a little sticky between but u get used to it
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