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Author 1.3 8v tuning
sand-eel
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Registered: 15th Mar 07
Location: carluke/braidwood--IRNBRULAND
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18th Feb 08 at 18:27   View User's Profile U2U Member Reply With Quote
i know that the 1.2 can be easily tuned from like 1.3 manifold and carb and gte cam, but is there "bolt on" mods like that for the 1.3sr and what sort of gains are we talking?
thanks
Scotty C
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Registered: 6th Nov 05
Location: Kidderminster Drives: 1.6 16v Sport
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18th Feb 08 at 18:31   View User's Profile U2U Member Reply With Quote
1.4 SR head, inlet, and manifold.
sand-eel
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18th Feb 08 at 18:33   View User's Profile U2U Member Reply With Quote
and carb? whats the difference to the head?
andyc1234
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Registered: 7th Nov 06
Location: Lancashire
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18th Feb 08 at 18:40   View User's Profile U2U Member Reply With Quote
stick a 1.6 carb on 1.6 cam same as a 1.2 really
Scotty C
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Location: Kidderminster Drives: 1.6 16v Sport
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18th Feb 08 at 18:45   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by sand-eel
and carb? whats the difference to the head?


Bigger ports.
sand-eel
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18th Feb 08 at 18:58   View User's Profile U2U Member Reply With Quote
take it you CAN'T put a 1.4sr head on and a 1.6 carb and cam?
sand-eel
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18th Feb 08 at 22:43   View User's Profile U2U Member Reply With Quote
yes/no/maybe/i don't know
Limecat
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19th Feb 08 at 02:32   View User's Profile U2U Member Reply With Quote
Sorry but why bother? For the cost of these uprated SR mods you could buy a better small block lump that will be a better starting point than a 1.2 which wil always be tripe.
sand-eel
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19th Feb 08 at 15:35   View User's Profile U2U Member Reply With Quote
eh? it's a 1.3 though
sand-eel
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19th Feb 08 at 15:35   View User's Profile U2U Member Reply With Quote
what do you mean anyway.....get an sri instead?
Superlite Ltd.
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Registered: 9th Jan 07
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19th Feb 08 at 15:42   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by andyc1234
stick a 1.6 carb on 1.6 cam same as a 1.2 really


thats what i'd do
sand-eel
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19th Feb 08 at 15:52   View User's Profile U2U Member Reply With Quote
doesn't it over fuel then? or does the cam give the extra air?

[Edited on 19-02-2008 by sand-eel]
Superlite Ltd.
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19th Feb 08 at 16:18   View User's Profile U2U Member Reply With Quote
People seem so scared of cars over fueling these days. A lean mix is more dangerous tbh
sand-eel
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19th Feb 08 at 16:37   View User's Profile U2U Member Reply With Quote
yeah but you lose power overfueling usually and does less to the gallon
Superlite Ltd.
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19th Feb 08 at 16:53   View User's Profile U2U Member Reply With Quote
You lose power do you

Any competition engine runs a lambda less than 1
sand-eel
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19th Feb 08 at 16:57   View User's Profile U2U Member Reply With Quote
a 1.3 8v is not a competition engine i'm sure competition engines over fuel for cooling purposes.
i'm talking much overfueling so much it bogs down etc
Superlite Ltd.
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19th Feb 08 at 17:08   View User's Profile U2U Member Reply With Quote
I had a 1.8 injector in a 1.4 SPI before. Just made the revs take longer to drop really.

1.6 cam might be a good idea mind
sand-eel
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19th Feb 08 at 17:23   View User's Profile U2U Member Reply With Quote
i'm just seeing because i'm dying for a 1.3sr nova don't usually like mk1's but there something about white 1.3sr's
Vaux Lad
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Registered: 15th Dec 04
Location: Stoke-on-Trent
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19th Feb 08 at 17:51   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by Monster
1.4 SR head, inlet, and manifold.

That would loose you about 10bhp
sand-eel
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19th Feb 08 at 18:50   View User's Profile U2U Member Reply With Quote
i thought the 1.2 and 1.3 heads were better because the 1.4carbs are square ports and the 1.2 and 1.3's are nice and oval
Vaux Lad
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Registered: 15th Dec 04
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19th Feb 08 at 19:02   View User's Profile U2U Member Reply With Quote
Aye
Fitting a 1.4sr head will loose you a proven 8-10bhp.

You could fit a weber 32/34dtml carb.
Are you using the engine for autocross or something? Restricted to a single carb?
sand-eel
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Location: carluke/braidwood--IRNBRULAND
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19th Feb 08 at 19:05   View User's Profile U2U Member Reply With Quote
na i'm just interested (filling up my vauxhall knowledge) because i haven't heard much in the way of tuning 1.3's only 1.2's but i suppose they are nearly the same anyway so tuning must be similar.
is a 32/34 carb from an astra 1.6? and i presume you need the inlet too? but the ports will be different......
Superlite Ltd.
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19th Feb 08 at 19:19   View User's Profile U2U Member Reply With Quote
2x webbers and a manifold to fit them would be nice

but thats not cheap
Vaux Lad
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19th Feb 08 at 19:29   View User's Profile U2U Member Reply With Quote
A 32/34 is a replacement for the standard 1300/1400Sr carb.
As it has a mechanical second choke, instead of the vacuum operated one on the standard carb.

I was just insterested in why your fitting/have fitted a 1300, and want to tune that, when a standard 1600 mpi 8v will be quicker and cost £50....
sand-eel
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19th Feb 08 at 20:09   View User's Profile U2U Member Reply With Quote
i haven't done anything i'am just filling up with knowledge as above ^^^

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