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Gearbox Upgrade + clutch advice
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Old 30 Jan 2010, 09:39 PM   #1 (permalink)
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Gearbox Upgrade + clutch advice

hey all, please Advice what parts should i upgrade and where get them from to make it hold 1/4Mile runs

also please advice which clutch disc go for daily drive + weekends.
i'm thinking about ACT Paddle clutch but guys over here say that Gearbox will die as soon as i fit Ceramic clutch on engine
can anybody advice?

E-GC8
MODEL: GC8C4ED
OPTION: BJC
ENGINE: EG20GDW5PE
GEARBOX: TY752VB4AA
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Old 30 Jan 2010, 10:02 PM   #2 (permalink)
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Re: Gearbox Upgrade + clutch advice

stick a exedy organic in it and enjoy.
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Old 30 Jan 2010, 10:03 PM   #3 (permalink)
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Re: Gearbox Upgrade + clutch advice

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Originally Posted by bugeye_bob View Post
stick a exedy organic in it and enjoy.
will it handle crazy way of driving?
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Old 31 Jan 2010, 10:13 AM   #4 (permalink)
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Re: Gearbox Upgrade + clutch advice

paddle clutch will probably launch amazingly well as it will bite and hold on hard to the flywheel without any slip. But it will shock the rest of your transmission and as you say it will probably kill your gearbox, it will probably eventually chew up your flywheel as well. As Brett has said above, get an Exedy organic clutch kit. the one with an uprated cover plate. Alternatively a company in the UK 'API engines' do the same Exedy kit but with a heavy duty friction plate that will take more abuse and torque. The organic friction plate wil allow you to slip the clutch for pleasant daily driving, unlike a paddle plate. I've been going through the same dilema as you, and have a paddle kit ready to be fitted but am now having second thoughts. I drive the car daily and the thought of trying to reverse park, or having to sit in traffic where you require slipping the clutch a lot has put me off to be honest. I may just get a heavy duty organic API exedy friction plate for the kit instead.

Andrew
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Last edited by brumbrum; 31 Jan 2010 at 10:17 AM.
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Old 31 Jan 2010, 10:42 AM   #5 (permalink)
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Re: Gearbox Upgrade + clutch advice

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Originally Posted by brumbrum View Post
paddle clutch will probably launch amazingly well as it will bite and hold on hard to the flywheel without any slip. But it will shock the rest of your transmission and as you say it will probably kill your gearbox, it will probably eventually chew up your flywheel as well. As Brett has said above, get an Exedy organic clutch kit. the one with an uprated cover plate. Alternatively a company in the UK 'API engines' do the same Exedy kit but with a heavy duty friction plate that will take more abuse and torque. The organic friction plate wil allow you to slip the clutch for pleasant daily driving, unlike a paddle plate. I've been going through the same dilema as you, and have a paddle kit ready to be fitted but am now having second thoughts. I drive the car daily and the thought of trying to reverse park, or having to sit in traffic where you require slipping the clutch a lot has put me off to be honest. I may just get a heavy duty organic API exedy friction plate for the kit instead.

Andrew
i use ACT paddle clutch on my evo and i know how is it to drive in Heavy traffic :P
where can i find that Excedy uprated clutch disc over internet?
and what size (milimeter) should be GC8 STI clutch disc? 225mm? or less? please advice. and also how many tooth has Clutch disc inside? 24? or more or less? please tell me

George
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Old 31 Jan 2010, 08:23 PM   #6 (permalink)
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Re: Gearbox Upgrade + clutch advice

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i use ACT paddle clutch on my evo and i know how is it to drive in Heavy traffic :P
where can i find that Excedy uprated clutch disc over internet?
and what size (milimeter) should be GC8 STI clutch disc? 225mm? or less? please advice. and also how many tooth has Clutch disc inside? 24? or more or less? please tell me

George
for a GC8 you want 230mm plate. below is a link to the Heavy duty organic kit i mentioned above. The company are very well respected in the UK and can be trusted. The owner is called David O'Brien who will be happy to help you, perhaps you could give him a phone call. He will sell you the friction plate seperately rather than having to buy the whole clutch kit as in the advert. Hope this helps

LINK: API Engines, Subaru Impreza Specialists
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Old 31 Jan 2010, 08:28 PM   #7 (permalink)
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Re: Gearbox Upgrade + clutch advice

i prefere to get parts from USA
it will cost me much cheaper
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Old 31 Jan 2010, 08:29 PM   #8 (permalink)
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Re: Gearbox Upgrade + clutch advice

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i prefere to get parts from USA
it will cost me much cheaper
Watch ur back as there is a lot of cheap copies about
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Old 31 Jan 2010, 08:34 PM   #9 (permalink)
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Re: Gearbox Upgrade + clutch advice

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Originally Posted by bugeye_bob View Post
Watch ur back as there is a lot of cheap copies about
yeah i know. but there are original parts too
so is it 100% correct that my 95 STI has 230mm friction plate?
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Old 31 Jan 2010, 11:19 PM   #10 (permalink)
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Re: Gearbox Upgrade + clutch advice

yes 230mm
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Old 01 Feb 2010, 08:49 AM   #11 (permalink)
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Re: Gearbox Upgrade + clutch advice

clutch is prob gonna be the least of your worries, personaly i'd l;eave the standard one in, it'll currently be the weakest link, if the clucth doesn't go the gearbox will, so better to replace clutch than gearbox. but if your dragging alot you'll prob shell out the box anyway im afraid
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Old 01 Feb 2010, 09:05 AM   #12 (permalink)
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Re: Gearbox Upgrade + clutch advice

so it means i should have another spare Gearbox in garage :P
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Old 01 Feb 2010, 09:06 AM   #13 (permalink)
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Re: Gearbox Upgrade + clutch advice

lol, tbh lots of launches on a 5 speed box are just gonna kill it. only real options are to 6 speed or ppg, but drag isn't easy even on those im afraid.
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Old 01 Feb 2010, 09:09 AM   #14 (permalink)
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Re: Gearbox Upgrade + clutch advice

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lol, tbh lots of launches on a 5 speed box are just gonna kill it. only real options are to 6 speed or ppg, but drag isn't easy even on those im afraid.
F*ck then how ppl drag on STIs?
what costs 6spd Box approx ? (used one) with rear diff ?
does anybody know?
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Old 01 Feb 2010, 10:21 AM   #15 (permalink)
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Re: Gearbox Upgrade + clutch advice

they tend to break them. depends how serious they are dragging them. 2-3000 for a built box including required diffs etc.
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