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Author Freeing up power in a GSI..................
Meat-Pie-SRI
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Registered: 10th Apr 02
Location: Berkhamsted, Drives Mk4 R32
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11th Jul 03 at 17:45   View User's Profile U2U Member Reply With Quote

best ways to do it pleeeeaassseeee!

thanky doo

chris
dousey
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Registered: 21st May 03
Location: Selsey, West Sussex
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11th Jul 03 at 19:15   View User's Profile U2U Member Reply With Quote

Probably an inlet manifold, goof for 20+bhp. Look at lexmaul, mantzel powerbox and velos torq tube. Costs from 400 to about 575
2.5corsaV6
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Registered: 17th Mar 03
Location: Ilford Essex
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11th Jul 03 at 20:24   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by dousey
Probably an inlet manifold, goof for 20+bhp. Look at lexmaul, mantzel powerbox and velos torq tube. Costs from 400 to about 575


do these have a web site to go to??
dousey
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Registered: 21st May 03
Location: Selsey, West Sussex
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11th Jul 03 at 20:55   View User's Profile U2U Member Reply With Quote

Yeah,
Lexmaul - www.pvdnet.co.uk
Velos - www.vmotorsport.fsnet.co.uk
Mantzel - www.courtenaysport.co.uk

2.5corsaV6
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Registered: 17th Mar 03
Location: Ilford Essex
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11th Jul 03 at 21:11   View User's Profile U2U Member Reply With Quote

cheers dousey
dousey
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Registered: 21st May 03
Location: Selsey, West Sussex
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11th Jul 03 at 21:14   View User's Profile U2U Member Reply With Quote

No worries
2.5corsaV6
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Registered: 17th Mar 03
Location: Ilford Essex
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11th Jul 03 at 21:24   View User's Profile U2U Member Reply With Quote

wouldnt it b much easier jus to get a turbo??
u get much more power gains!!

by the way, if u fit a 2.0 lit turbo in a corsa B would the gearbox change to 6gears??
dousey
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Registered: 21st May 03
Location: Selsey, West Sussex
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11th Jul 03 at 21:40   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by 2.5corsaV6
wouldnt it b much easier jus to get a turbo??
u get much more power gains!!

by the way, if u fit a 2.0 lit turbo in a corsa B would the gearbox change to 6gears??


Would be talking a lot of money. If you took it to somewhere like courtenay sport they will charge you a few grand for it! Not to mention the insurance. So no, it wouldn't be easier to drop in a turbo lump. The turbo engine would come from a cav or calibra. I am not sure if these cars have 6 gears. If not you would have to pay a good few hundred for the 6 speed box.
kerzo
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Registered: 10th Nov 02
Location: Norn Iron
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11th Jul 03 at 21:43   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by 2.5corsaV6
wouldnt it b much easier jus to get a turbo??
u get much more power gains!!

by the way, if u fit a 2.0 lit turbo in a corsa B would the gearbox change to 6gears??


you may get more power gains with a turbo but you will spend a lot more and it will be less reliable and you may need to uprate the internals.

the gearbox for the C20LET is an F28 which has 6 gears but i think you can use an F20 but not sure on that which is a 5 gear
BeArDy
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Registered: 7th Aug 00
Location: Manchester
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11th Jul 03 at 21:51   View User's Profile U2U Member Reply With Quote

yes u can use a F20 box with the turbo lump which save u alot of money on parts as its not a basic fit like the F20
2.5corsaV6
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Registered: 17th Mar 03
Location: Ilford Essex
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11th Jul 03 at 23:21   View User's Profile U2U Member Reply With Quote

but if u want good amounts of BHP it would cost loads 2 get all the parts listed = mantzel powerbox, velos torq tube, inlet manifold
dousey
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Registered: 21st May 03
Location: Selsey, West Sussex
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11th Jul 03 at 23:28   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by 2.5corsaV6
but if u want good amounts of BHP it would cost loads 2 get all the parts listed = mantzel powerbox, velos torq tube, inlet manifold

And a turbo engine conversion would be cheaper?
2.5corsaV6
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Registered: 17th Mar 03
Location: Ilford Essex
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11th Jul 03 at 23:35   View User's Profile U2U Member Reply With Quote

kno but u get more BHP and might as well go the whole way and save up abit longer. at least u wuld be some wot more satisfied about the amount of bhp u have
BeArDy
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Registered: 7th Aug 00
Location: Manchester
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12th Jul 03 at 01:28   View User's Profile U2U Member Reply With Quote

for most BHP per pound your will never beat a 2lt 16v
miles
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Registered: 25th Mar 02
Location: plymouth Drives: Astra Sport
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12th Jul 03 at 10:18   View User's Profile U2U Member Reply With Quote

Yes you will. 2.0 8v.
Tom
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Registered: 3rd Apr 02
Location: Wirral, Merseyside
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12th Jul 03 at 14:54   View User's Profile U2U Member Reply With Quote

If you got enuf money get sbd t/b kit for your gsi kewl
luca2020
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Registered: 26th May 02
Location: Maidstone, Kent
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12th Jul 03 at 18:12   View User's Profile U2U Member Reply With Quote

C20LET + F28 gearbox and fitted will cost 2.5k+, but places like courtny will charge 5k!!! lol

Turboing a gsi is unreliable, and costs 3k. u get about the same bhp as TBs, but u get alot more tourqe

TBs are very reliable, SBD jobbies cost about 2k, fitting depends on weather u do it ur self, get a mate or a garage to do it

Then u got the powerbox's e.g. velos, manzal, lexmaul - around 400-550, fitting again depends on weather u do it ur self, a mate or a garage

Miles - how much BHP does the 2.0 8v have. and how much for a conversion?
Gary GSi
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Registered: 30th Oct 02
Location: Lincoln
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12th Jul 03 at 18:30   View User's Profile U2U Member Reply With Quote

If you can fit stuff yourself for the same price as a conversion you can get the same BHP as a C20XE.
You need a mentel power box,Get rid of the whole standard exhaust system and get a lexmaul manifold,De-cat pipe and group A centre and back box, An adjustable fuel pressure regulator, At least stage 2 head work and a superchip to put the rev limiter up to about 7500RPM. And if you have any spare cash an oil cooler is worth the money.
miles
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Registered: 25th Mar 02
Location: plymouth Drives: Astra Sport
User status: Offline
12th Jul 03 at 21:25   View User's Profile U2U Member Reply With Quote

2.0 8v's have 115 or 130bhp.

You can buy a whole cavalier with one of those engines in for about 100, then you have the brakes and other bits to sell as well.....

Fitting, depends who does it, engine mounts are cheap I believe and you could probably use standard shafts.... or might need to change the hubs I think....
MoNkEy MaGiC
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Registered: 12th Apr 03
Location: West - London Drives: Corsa GSi
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   12th Jul 03 at 21:34   View User's Profile U2U Member Reply With Quote

yea ive heard a lot about these inlet manifolds and the amount of power and torque they can free up is Mad!!! coudnt believe how restricted these engines were!

ive been thinking of getting a inlet manifold for my gsi,and correct me if im wrong guys but i reckon the mantzel powerbox is the best so far, only thing stopping me is the insurance! what they gonna say when i tell em my cars got another 20BHP under the bonnet! how much more will the premium go up by u reckon???
luca2020
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Registered: 26th May 02
Location: Maidstone, Kent
User status: Offline
13th Jul 03 at 12:03   View User's Profile U2U Member Reply With Quote

yer u can tune a gsi to around 150bhp for the price of a 2.0 conversion, but u will get nowhere near the tourqe that the 2.0 produces, and tourqe as we all know well is the key to speed
mikeytigra
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Registered: 7th Jul 03
Location: chester
User status: Offline
13th Jul 03 at 13:50   View User's Profile U2U Member Reply With Quote

also fit a power boost valve it will help in the mid range power
Akeemking
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Registered: 25th Nov 01
Location: PORTUGAL
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23rd Sep 03 at 22:25   View User's Profile U2U Member Reply With Quote

fuk that
go for OMEGA/LOTUS 3.6 Biturbo engine

just kidding
1.6 16V or 2.0 16V and SBD TBs and Gr.A exhaust... i would if i didnt had a LET
Paul_J
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Registered: 6th Jun 02
Location: London
User status: Offline
23rd Sep 03 at 22:37   View User's Profile U2U Member Reply With Quote

err... straying from the subject a bit?

All this guy wants is to free up some power - a cheap way of doing this is to get one of these inlet mainfolds, listed above...

they're pretty cheap 300-500

and taking your gsi to say 126ish bhp aint bad for only 300 quid.

The guy that keeps just saying 'it'd be cheaper to chuck a turbo in' - what the F*ck?

looking at what 3000 ... then insurance on top.

Not everyone has that much money, this guy just wants a cheap way to get a bit more performance thats all!
broster
Premium Member

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Registered: 6th Dec 02
Location: Drives: E39
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24th Sep 03 at 07:04   View Garage View User's Profile U2U Member Reply With Quote

to gain more power foller these steps:-
1, get ur new coilovers
2, give old ones to me
3, my car will be drivable again above 40mph an will go straight when i brake!
4, buy a new inlet, tbs etc!
lol :-)
seriously tho it all depends on ur budget dont it, i mean if u have 1.5K get a 2ltr if u only want an extra few bhp get a new zorst, maily for noise! and get a new inlet, then try a exhaust manifold an de-cat and then uni chip with raised limit

 
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