craig-dodd
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Registered: 6th May 09
Location: Flintshire
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when someone with a high powered let that runs a f20 and it breaks what parts inside the box actually breaks?
[Edited on 09-05-2012 by craig-dodd]
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Dan295
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Registered: 9th Oct 06
Location: London
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probably the gears on the input or lay shaft, increased bhp means more stress on the teeth making contact with each other and attempting to transfer more torque than they were designed for
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fazza
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Registered: 7th Feb 08
Location: Plymouth
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I noticed when fitting my f20 back to my let, the input shaft on the f20 is tiny compared to the one on the f28
not sure what part fails though, will probably be able to tell you in a few months when it goes lol
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craig-dodd
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Registered: 6th May 09
Location: Flintshire
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thanks for the info lads 
i think i will see if mine shits it's self and see if i can make stronger parts for it
[Edited on 09-05-2012 by craig-dodd]
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keidicko
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Registered: 15th Jan 12
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Everything breaks gears shafts the lot and expect about two weeks out of each box !
But on the plus side they are lighter than an f28 and ratios are good
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craig-dodd
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Registered: 6th May 09
Location: Flintshire
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ive seen that a few people use f18w instead so might get one just in case
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keidicko
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Registered: 15th Jan 12
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You do know what the numbers mean on the gearbox's ?
Its what ftlb torque they will take !
F20 takes 200ftlb and an f18 takes 180ftlb
[Edited on 09-05-2012 by keidicko]
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craig-dodd
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Registered: 6th May 09
Location: Flintshire
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yes i know what they mean but they can actually hold more than rated, its just to be safe, i have seen a few of high powered drag cars run f18w instead so why cant it work for me
[Edited on 09-05-2012 by craig-dodd]
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Corsa_Sport21
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Registered: 13th Apr 08
Location: Leven, Fife. Drives : 205 GTi
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Ive heard of F20's taking good power without issue's, but also heard of them taking not so good power, with issue's.
Start smashing through the box willy nilly, and it won't last. Take some care, feed the boost in etc, and im sure they will last a reasonable amount of time.
Also, im sure Specky was running an F18 at some point with mega power going through it. Im pretty sure it was on the F18 when it recorded 1 of its highest top speed runs too.
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craig-dodd
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Registered: 6th May 09
Location: Flintshire
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quote:
Originally posted by Corsa_Sport21
Also, im sure Specky was running an F18 at some point with mega power going through it. Im pretty sure it was on the F18 when it recorded 1 of its highest top speed runs too.
that is what i have heard, supposedly they use the f18w because longer between gear changes so less stress.
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BeArDy
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Registered: 7th Aug 00
Location: Manchester
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It all comes down to what you class as good power?
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craig-dodd
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Registered: 6th May 09
Location: Flintshire
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quote:
Originally posted by BeArDy
It all comes down to what you class as good power?
im aiming for at least 400whp, if that helps?
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BeArDy
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Registered: 7th Aug 00
Location: Manchester
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If your looking at 400whp then why you cutting corners and not putting the right box for it?
Your going to be best part of around 10k for the engine and then to fit a £50 gearbox when there is better/stronger gearboxes out there?
F28 or F23 only boxes i would use.
Last time i spoke to Powell with the 500+ White Tigra he had done 4 F28's in a year, if F20's where up for it why would he be spending £250+ on a box when he could throw a F20 in?
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BeArDy
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Registered: 7th Aug 00
Location: Manchester
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Just click on its for the Rear Engine Corsa and the gearlinkage.
Just fit a cable shift F23 and have done.
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craig-dodd
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Registered: 6th May 09
Location: Flintshire
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yeah your right i was just tryin to keep it simple, and simple aint always the best way
[Edited on 09-05-2012 by craig-dodd]
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Nic Barnes
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Registered: 5th Apr 04
Location: nowhere near ginger people
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I've killed 4 f28's in the last 3 years. my 5th box is pretty much done for in 3rd gear now. i wouldn't even joke about fitting an f20 when you will end up with a considerable amount of torque if you're aiming for 400 at the wheels.
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craig-dodd
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Registered: 6th May 09
Location: Flintshire
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thanks for everyones input ill try and get hold of a f23 this week then
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gazza808
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Registered: 30th Jun 08
Location: Peterborough
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quote:
Originally posted by keidicko
You do know what the numbers mean on the gearbox's ?
Its what ftlb torque they will take !
F20 takes 200ftlb and an f18 takes 180ftlb
[Edited on 09-05-2012 by keidicko]
Internet myth.
I know for a fact f18 is stronger than a f20,
Same car killed an f20 every time it went to pod with one fitted, even on road legal tyres,
Then with more power, full on drag slicks, its never killed an f18,
All on a car running 10's, sooo a fair bit of power.
But I agree with beardy get an f23
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DERV-POWER
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Registered: 13th Sep 09
Location: Greenfield, Flintshire
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my diesel had a f17 with 220lbft going through it , it was clutch that gave way first
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