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Author F16,F20 & F18!!
daine
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Registered: 28th Feb 07
Location: rossington
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8th Jan 13 at 23:48   View Garage View User's Profile U2U Member Reply With Quote
putting a C20XE in me track car and was wondering which gearbox would suit and what is the
difference in all 3
Generation
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Registered: 7th Jul 09
Location: Essex
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9th Jan 13 at 00:01   View User's Profile U2U Member Reply With Quote
Shorter gear ratios, so will get off mark quickens but top end speed will be reduced overall
daine
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Registered: 28th Feb 07
Location: rossington
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9th Jan 13 at 00:15   View Garage View User's Profile U2U Member Reply With Quote
Thought the f16 was only shorter in first 2 gears than an f20 and then the same! what about the F18!?!?
they any good or is it just newer?
Mr-SEH
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Registered: 10th May 10
Location: Dark places
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9th Jan 13 at 01:03   View User's Profile U2U Member Reply With Quote
I had f18 on mine for few weeks and it was shit as it was long ratio just revved for ever and was boring I got f16 now and can't fault it.
Bprice91
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Registered: 2nd Oct 12
Location: Swindon
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9th Jan 13 at 08:09   View User's Profile U2U Member Reply With Quote
ive got an f18 in mine now i havent had a problems with it good box
one-mr-t
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Registered: 4th Aug 09
Location: Greater Manchester
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9th Jan 13 at 08:12   View User's Profile U2U Member Reply With Quote
I had f16 on my xe blew the diff with in 2weeks fitted a f20 and couldn't fault it
Jed D
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Registered: 15th Mar 11
Location: Durham
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9th Jan 13 at 08:46   View User's Profile U2U Member Reply With Quote
theres different F18's, loads of differences in the ratios in them.
daine
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Registered: 28th Feb 07
Location: rossington
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9th Jan 13 at 09:23   View Garage View User's Profile U2U Member Reply With Quote
the f18 I can have, with clutch and flywheel Jed is on an astra mk3 sport, will this ratio be ok???
corsadonk
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Registered: 4th Jul 09
Location: Marlborough, Wiltshire
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9th Jan 13 at 09:36   View Garage View User's Profile U2U Member Reply With Quote
I've always found the F20 just right, if you can find one from a 4x4 they are a bit shorter.
daine
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Registered: 28th Feb 07
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9th Jan 13 at 10:32   View Garage View User's Profile U2U Member Reply With Quote
http://www.opel-infos.de/getriebe/f18.html

Cheers Jed, looked on hear! there's 1001 different ratio's but the F18 out astra F look's good

[Edited on 09-01-2013 by daine]

[Edited on 09-01-2013 by daine]
Tony M84
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Registered: 26th Jul 11
Location: Leicester
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9th Jan 13 at 12:41   View User's Profile U2U Member Reply With Quote
F20 is the one you want. F18's are not as strong.
Jed D
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9th Jan 13 at 12:51   View User's Profile U2U Member Reply With Quote
personally id got for the F20 but thats just me, better ratios for drag use etc... hence why i swapped a F18 for one.
im pretty sure theres more than just your basic F18WR and F18CR, theres a few from what iv heard but not too sure whats best
daine
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Registered: 28th Feb 07
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9th Jan 13 at 13:22   View Garage View User's Profile U2U Member Reply With Quote
Its going to be for a track only car, the f18 cr I've been offered comes with flywheel,clutch and equal length
shafts. so I think I'll give it a go..
that's unless some one can explain a good reason not too.
Jed D
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Location: Durham
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9th Jan 13 at 23:56   View User's Profile U2U Member Reply With Quote
as said theres different ones, not just wr and cr, heard good and bad reports about them. diff's arent the best but give it a go, only going to be 50 or whatever to change to a F20 if it goes tits up

 
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