C12NZ Tuning? - Corsa Sport - for Vauxhall and Opel Corsa B, Corsa C and Corsa D

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ChrisBoom

Member

Registered: 6th Dec 06
Location: Highland
User status: Offline

27th Mar 07 at 16:04

quote:
Originally posted by Vaux Lad
You cant use the 1.2 inlet nope, as the 1.8 tb butterfly valve is too large and hits the manifold.
1.8spi engine is a big block engine, so its inlet wont fit your small block 1.2i engine.

1.6i inlet is the one you need, and it needs filing out by about 1/2mm to completely match the width of the 1.8tb butterfly.
You wont need block the egr if your 1.2i has a egr valve, my p-plate corsa with a 1.2i does. Early ones didn't.

I had a 1.6 inlet, but sold it

[Edited on 27-03-2007 by Vaux Lad]

Right, cheers for that. So ill be needing:

1.4 Injector

1.8 Throttle Body

1.6 Inlet

GSI Manifold

1.4SR or GSI/GTE Cam

Straight through exhaust? But with the cat?

If its gonna be too much work, I might just fire a 1.4 SRI engine in it, probably be less work for more power... But we shall see, might not even keep this corsa, if i find a nice nova, its gone..

Vaux Lad

Member

Registered: 15th Dec 04
Location: Stoke-on-Trent
User status: Offline

27th Mar 07 at 16:21

Yep.
I had that setup on my old 1.2i nova engine, worked fine.

ChrisBoom

Member

Registered: 6th Dec 06
Location: Highland
User status: Offline

27th Mar 07 at 16:38

quote:
Originally posted by Vaux Lad
Yep.
I had that setup on my old 1.2i nova engine, worked fine.

Did you notice much of a difference? If I am doing this, Ill get all the bits together and take the engine out, clean it up, and clean the engine bay up.

Vaux Lad

Member

Registered: 15th Dec 04
Location: Stoke-on-Trent
User status: Offline

27th Mar 07 at 16:53

The nova gte cam made the biggest difference.
That adds a proven 5/6bhp on its own.

With the inlet etc, i did notice a slight difference, seemed to pull harder.

The head is still restrictive tho, so you dont get the most out of the throttle body.

I ran the same size throttle body on a 85/90bhp 1.4spi engine, so the tb isn't the limiting factor, that can supply enough air for 90ish bhp.

ChrisBoom

Member

Registered: 6th Dec 06
Location: Highland
User status: Offline

27th Mar 07 at 17:08

quote:
Originally posted by Vaux Lad
The nova gte cam made the biggest difference.
That adds a proven 5/6bhp on its own.

With the inlet etc, i did notice a slight difference, seemed to pull harder.

The head is still restrictive tho, so you dont get the most out of the throttle body.

I ran the same size throttle body on a 85/90bhp 1.4spi engine, so the tb isn't the limiting factor, that can supply enough air for 90ish bhp.

Cheers mate, very informative.. Would it make much difference if i whipped out the dremmel and had a go at matching the ports on the head? Or would i end up fucking it?
I was just down at the car, havent been in ages... Think ill keep it, it will look good with white wheels and the arches etc colour coded...

Vaux Lad

Member

Registered: 15th Dec 04
Location: Stoke-on-Trent
User status: Offline

27th Mar 07 at 17:27

I wouldn't put a dremel anywhere near a head thats still bolted to the block with valves etc in...
So i'd leave it.

ChrisBoom

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Registered: 6th Dec 06
Location: Highland
User status: Offline

27th Mar 07 at 22:15

quote:
Originally posted by Vaux Lad
I wouldn't put a dremel anywhere near a head thats still bolted to the block with valves etc in...
So i'd leave it.

Aye, but say if the head was off on a bench, stripped down?

Vaux Lad

Member

Registered: 15th Dec 04
Location: Stoke-on-Trent
User status: Offline

27th Mar 07 at 23:44

Could try it yeah, just a general smooth up of the casting marks etc.

cor5a_tommy

Member

Registered: 31st Jan 07
User status: Offline

28th Mar 07 at 16:05

i just got my missus a 1.2 8v too...even an aftermarket backbox doesnt affect noice let alone power...ive got lots lined up...but for 15bhp and all the parts needed to tune the 1.2, its far less time consuming to just whack in the 1.4, which can also be tuned a bit better at a later date.

As for insurance...959seems steep...why dont u be a named driver on a parents policy with Direct Line? u get ur own no claims then...i still do that and im 20, costs me £320 a year and 2 ppl can drive the car. Thats on my own X14XE with mods declared. It was only £460 when i was 17.

Tuning a 1.2 with 44bhp to give it the power most other 1.2's already have is silly IMO. Ive tried and failed and found 60hp to be almost as bad...car just feels like it wants to be quicker, at least with the 44bhp engine it doesnt even try. No gimmicks and no false pretences lol

ChrisBoom

Member

Registered: 6th Dec 06
Location: Highland
User status: Offline

30th Mar 07 at 22:57

1.8 Throttle Body:

Just need the other bits now

Scotty C

Member

Registered: 6th Nov 05
Location: Kidderminster Drives: 1.6 16v Sport
User status: Offline

30th Mar 07 at 23:10

Pointless. There's a 1.2 8v Nova around here on carbs, cams, full exhuast etc. Got beat by a 1.4 8v S.P.I Corsa...

CorsAsh

Member

Registered: 19th Apr 02
Location: Munich
User status: Offline

30th Mar 07 at 23:10

quote:
Originally posted by Vaux Lad
Could try it yeah, just a general smooth up of the casting marks etc.

Like so:

ChrisBoom

Member

Registered: 6th Dec 06
Location: Highland
User status: Offline

29th Aug 07 at 21:33

quote:
Originally posted by ChrisBoom

Right, cheers for that. So ill be needing:

1.4 Injector - Got it

1.8 Throttle Body - Got it

1.6 Inlet - Getting it, once its delivered

GSI Manifold - Got it

1.4SR or GSI/GTE Cam - Got a GSI cam

Straight through exhaust? But with the cat? Soon to be sorted

Bumping this as Ive got all the bits now.

Any advice on filing down the inlet to match the tb?

Superlite Ltd.

Member

Registered: 9th Jan 07
User status: Offline

29th Aug 07 at 21:37

Dremel too

corsasriboy

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Registered: 23rd Mar 07
Location: leicestershire
User status: Offline

29th Aug 07 at 22:15

http://cgi.ebay.co.uk/VAUXHALL-CORSA-1-2-8v-GAS-FLOWED-CYLINDER-HEAD_W0QQitemZ120155460859QQihZ002QQcategoryZ10404QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

ChrisBoom

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Registered: 6th Dec 06
Location: Highland
User status: Offline

29th Aug 07 at 22:22

quote:
Originally posted by corsasriboy
http://cgi.ebay.co.uk/VAUXHALL-CORSA-1-2-8v-GAS-FLOWED-CYLINDER-HEAD_W0QQitemZ120155460859QQihZ002QQcategoryZ10404QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

I could buy, fit, and run a 1.4 sri engine for that

joey736

Member

Registered: 11th Mar 07
Location: hexham, near newcastle drives: Aurora XE
User status: Offline

29th Aug 07 at 22:31

quote:
Originally posted by corsasriboy
http://cgi.ebay.co.uk/VAUXHALL-CORSA-1-2-8v-GAS-FLOWED-CYLINDER-HEAD_W0QQitemZ120155460859QQihZ002QQcategoryZ10404QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

that guy lives near me, work is absolutely top notch!

Vaux Lad

Member

Registered: 15th Dec 04
Location: Stoke-on-Trent
User status: Offline

30th Aug 07 at 00:10

Get the file out,lol.
It takes a while as the difference is about 3mm

ChrisBoom

Member

Registered: 6th Dec 06
Location: Highland
User status: Offline

30th Aug 07 at 00:12

quote:
Originally posted by Vaux Lad
Get the file out,lol.
It takes a while as the difference is about 3mm

Ah shit

Just files like these?

http://cgi.ebay.co.uk/PRO-FILE-SET-OF-5-ENGINEERS-FILES-METAL-WORK-ASSORTED_W0QQitemZ160152370176QQihZ006QQcategoryZ303QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

Vaux Lad

Member

Registered: 15th Dec 04
Location: Stoke-on-Trent
User status: Offline

30th Aug 07 at 00:14

Yep.
The "domed" one is best.

Have fun

ChrisBoom

Member

Registered: 6th Dec 06
Location: Highland
User status: Offline

30th Aug 07 at 00:15

quote:
Originally posted by Vaux Lad
Yep.
The "domed" one is best.

Have fun

Great

Is there many gaskets in about there? Shall need to get new ones

Vaux Lad

Member

Registered: 15th Dec 04
Location: Stoke-on-Trent
User status: Offline

30th Aug 07 at 00:21

Just the one in between the throttle body and the inlet.
Oh, and make sure you completely clear the filings out the inlet,lol.

ChrisBoom

Member

Registered: 6th Dec 06
Location: Highland
User status: Offline

30th Aug 07 at 00:30

quote:
Originally posted by Vaux Lad
Just the one in between the throttle body and the inlet.
Oh, and make sure you completely clear the filings out the inlet,lol.

Oh aye, the brake cleaner and hoover will be out

What best to block off the EGR, just get the plate from vaux, or make one?

Butler

Member

Registered: 2nd Jun 05
Location: London
User status: Offline

30th Aug 07 at 01:33

Chris why dont you just buy a x16xe, rebuild it and tune it while your building up your no claims and drop it in when you can afford it? Your going to waste alot of money this way.

Robin

Premium Member