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Author c12nz help
Kurt
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Registered: 23rd Oct 05
Location: Hi
User status: Offline
20th Apr 07 at 16:58   View User's Profile U2U Member Reply With Quote
just tried ringing to get a 1.6 spi inlet manifold and 1.8 cav throttle body but i need to know what shape ports im after, round, square or oval

anyone know? or even know the engine codes these parts come off?

any helps apreciated, thanks Andy
ChrisBoom
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Registered: 6th Dec 06
Location: Highland
User status: Offline
20th Apr 07 at 16:59   View User's Profile U2U Member Reply With Quote
Cav throttle body has round ports anyway, I have one in the car. The C12NZ head has cathedral shaped ports, so the 1.6 spi inlet might be too?
Vaux Lad
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Registered: 15th Dec 04
Location: Stoke-on-Trent
User status: Offline
20th Apr 07 at 17:01   View User's Profile U2U Member Reply With Quote
All SPI's have Square inlet ports.

C16nz for the inlet
C18NZ for the throttle body.

I have a 1.8 throttle body if you need one.
Kurt
Member
Registered: 23rd Oct 05
Location: Hi
User status: Offline
20th Apr 07 at 17:02   View User's Profile U2U Member Reply With Quote
defo intrested in the throttle body price?

the dude just said it was oval for the inlet hes gonna look tomorrow anyway

[Edited on 20-04-2007 by kurtofcc]
little_duke
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Registered: 21st Aug 06
Location: Tamworth,staffordshire Drives: rover coupe
User status: Offline
20th Apr 07 at 23:36   View User's Profile U2U Member Reply With Quote
what does it acheive by sticking these on a c12nz? any performance?
Kurt
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Registered: 23rd Oct 05
Location: Hi
User status: Offline
21st Apr 07 at 00:21   View User's Profile U2U Member Reply With Quote
bit more responsive and with a 4-2-1 exhaust manifold puts its up to 60bhp lol
mattk
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Registered: 27th Feb 06
Location: St. Helens
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21st Apr 07 at 01:03   View User's Profile U2U Member Reply With Quote
wow
Kurt
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Registered: 23rd Oct 05
Location: Hi
User status: Offline
21st Apr 07 at 10:32   View User's Profile U2U Member Reply With Quote
to be honest 60bhp from a 1.2 8v i think would keep us with them happy, means we can go up hills without loosing power
little_duke
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Registered: 21st Aug 06
Location: Tamworth,staffordshire Drives: rover coupe
User status: Offline
21st Apr 07 at 12:29   View User's Profile U2U Member Reply With Quote
you sure its 60bhp mate??? cant see how that works!surely if thats crrect wouldnt everyone do it? a c12nz with 105bhp......pretty impressive
Vaux Lad
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Registered: 15th Dec 04
Location: Stoke-on-Trent
User status: Offline
21st Apr 07 at 17:47   View User's Profile U2U Member Reply With Quote
No, 60bhp in total.

Not adding 60bhp,lol.
Kurt
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Registered: 23rd Oct 05
Location: Hi
User status: Offline
21st Apr 07 at 21:44   View User's Profile U2U Member Reply With Quote
lol i wish 105bhp
CorsAsh
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Registered: 19th Apr 02
Location: Munich
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22nd Apr 07 at 07:21   View User's Profile U2U Member Reply With Quote
Square ports as said above:
Kurt
Member
Registered: 23rd Oct 05
Location: Hi
User status: Offline
2nd May 07 at 14:53   View User's Profile U2U Member Reply With Quote
update: ive got the throttle body thanks to vauxlad but im still having trouble when it comes to the inlet, getting asked to many questions,
i need to know year of astra inlet im after, if its two or four pin to downpipe and anything else thatll help identify it, cheers if you can help
Andy
Vaux Lad
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Registered: 15th Dec 04
Location: Stoke-on-Trent
User status: Offline
2nd May 07 at 16:55   View User's Profile U2U Member Reply With Quote
You need an inlet off a single point injection 1600 8v astra engine(c16nz)
Iirc mk3 astras had them throughout their production length, i.e. from 1992 to 1998.

I got one off a L-plate car.

It has a egr valve which you'll have to block off, i cut a template from some alloy sheet.

Also, the inlet throat needs opening up sightly to match the tb(the inlet is 43mm, the tb is 45mm)
Vaux Lad
Member
Registered: 15th Dec 04
Location: Stoke-on-Trent
User status: Offline
2nd May 07 at 16:57   View User's Profile U2U Member Reply With Quote
This is what you need mate
http://cgi.ebay.co.uk/Vauxhall-Astra-1-6-8-valve-Inlet-Manifold-and-SPI-Unit_W0QQitemZ110120576788QQihZ001QQcategoryZ10404QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
Kurt
Member
Registered: 23rd Oct 05
Location: Hi
User status: Offline
3rd May 07 at 07:41   View User's Profile U2U Member Reply With Quote
omg cheers mate been looking on t'ebay for months for one

 
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