starkie
Member
Registered: 1st Jul 03
Location: Leslie, Fife
User status: Offline
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just bought one and dont know what the best gearbox to use is f28 or f20
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Greasemonkey
Member
Registered: 17th Apr 02
Location: Drives a Tractor
User status: Offline
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F28 purely for the fact ya get 6 gears, and if ya start using phase 2-3 on the engine this gear box will handle the power
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Fad
Member
Registered: 1st Feb 01
Location: Dartford Kent Drives: 330cd
User status: Offline
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as mentioned b4 it depends how mad you want to go on tunning but the f20 is used in the majority of conversions and handles the torque fine
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miles
Member
Registered: 25th Mar 02
Location: plymouth Drives: Astra Sport
User status: Offline
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That would be debatable fads.
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James R
Member
Registered: 4th Feb 03
Location: 205GTi16/306GTi16
User status: Offline
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Use the box it's mean to come with, F28 is the way forward.
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bubble
Member
Registered: 24th Jan 04
Location: Darwin, NT Australia.
User status: Offline
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f28 purely bcuz very reliable and meant for the power.just get the blanking equipment to revert it to fwd only
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luca2020
Member
Registered: 26th May 02
Location: Maidstone, Kent
User status: Offline
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yup F28, u will kill the F20 in a short amount of time, the LET produces to much tourqe for the F20 to be reliable
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clarkie
Member
Registered: 24th Jun 03
Location: Nuneaton Drives:1.4 sport
User status: Offline
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try and get 1 from a 2wd tho, as bubble sed, u can get the blankin plate for the 4wd, but the 2wd box is lighter
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BeArDy
Member
Registered: 7th Aug 00
Location: Manchester
User status: Offline
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people have run F20 and F16 on Lets for years so dont let people say they will not last, as most of the people who tell you that havent even driven a LET or even owed one; to even know.
2 examples
Corsa 2.1 turbo 280bhp+ running F20 (about 12months+ now)
Nova 2.5 V6 with F16 gearbox (about 2 years)
non have had any problems at all with there gearboxs, Vauxhall are not going to name them by the MAX they can take, a F20 can take alot more then 200lb/ft they just set it at that so they last.........
i would say the F28 reason being when your on the motorway with a F20 and stilling around 70mph you are just hitting boost in 5th, which means if u have say a 300mile trip the engine will be boosting for them 300miles which in a corsa make the engine run very very hot which isent a good things for heat gaskets  , but with F28 in 6th on motorway 70mph is at 2000 revs and is under boost to heat isent a problem.
a F20 is fine for everyday trips around town etc and will work out alot cheaper BUT if your going to use the car for motorway use then F28 is the only way to be
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AndyCorsaC
Member
Registered: 22nd Sep 03
Location: Batley, West Yorkshire
User status: Offline
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how do u get a 2.1 turbo a bottom end and a different top end
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BeArDy
Member
Registered: 7th Aug 00
Location: Manchester
User status: Offline
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quote:
Originally posted by evzyboy
how do u get a 2.1 turbo a bottom end and a different top end
do u mean :
how do u get a 2.1 turbo?
with a bottom end and a differant top end?
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AndyCorsaC
Member
Registered: 22nd Sep 03
Location: Batley, West Yorkshire
User status: Offline
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sorry
how do u get a 2.1 turbo
is it using the different ends
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BeArDy
Member
Registered: 7th Aug 00
Location: Manchester
User status: Offline
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quote:
Originally posted by evzyboy
sorry
how do u get a 2.1 turbo
is it using the different ends
no you just get your bottomend rebored
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starkie
Member
Registered: 1st Jul 03
Location: Leslie, Fife
User status: Offline
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miles
Member
Registered: 25th Mar 02
Location: plymouth Drives: Astra Sport
User status: Offline
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Some people eat F20's with standard lets. Just keep chaning them because they are readily available and cheap. If your not the type of person who can do the work yourself I wouldn't have an F20.
It also depends how you drive it, and what condition F20 you get.
The lack of traction would help save the box, fitting a diff or slicks would help kill it.
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