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Old 4th May 2009, 01:06   #16
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Your last post left me with a smile as i remembered the days i went nuts trying to get the conti go fast. Went all the way just to realize reality does come in the way of dreams. Its about making the right choice in the first place.
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Old 4th May 2009, 07:47   #17
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Opel/Vauxhall do respond well to tuning. I am not too sure why they dont have a good reputation here. Check DBLIAS products on google or opel / vauxhall turboed / supercharged cars on you tube...

also check what courtney does in UK Vauxhall Opel VXR OPC Leading UK Tuning Specialist Courtenay Sport .

I should say , be it FFE or Turboing, it is way cheaper in India !
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Old 4th May 2009, 08:46   #18
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Yes they do respond well to tuning, but getting parts for the car is extremely difficult and god help in case of an engine failure. Secondly the weight of the car is a disadvantage one could get a better power to weight response from another make.
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Old 4th May 2009, 10:31   #19
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@vdiatech - That link you provided gave us a little more hope. Thanks.
@Psycho - The parts availability for the Astra is a bit of a concern.

All I know is Astra is SPFi. So I'm guessing SPFi means the injector injects fuel directly in the intake manifold and the mixture is evenly distributed to all the cylinders. A MPFi means the fuel is directly injected into the cylinders( like a diesel engine ). Is this concept right?
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Old 4th May 2009, 12:26   #20
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Quote:
Originally Posted by Torque350 View Post
@vdiatech - That link you provided gave us a little more hope. Thanks.
@Psycho - The parts availability for the Astra is a bit of a concern.

All I know is Astra is SPFi. So I'm guessing SPFi means the injector injects fuel directly in the intake manifold and the mixture is evenly distributed to all the cylinders. A MPFi means the fuel is directly injected into the cylinders( like a diesel engine ). Is this concept right?
SPFi is single point fuel injection, just one injector for all the four cylinders, in other word it's like a carb controlled by the computer.
MPFi , is multi point fuel injection , in this system there are four injector for four different cylinder in case of four cylinder engines.[one injector per cylinder]. and both these inject fuel in the manifold itself, what your talking about is Direct injection [in diesel] and petrol cars too have it now with different name form different companies.
Most of the Astras tuned in Europe use a 16V head on the engine and so the mods give it a hug bump in power, the India version had a 8 valve engine there wont be a big difference.So if your not looking for big power outputs and do not mind the cost of engine parts , go for it. but if your looking at figures to match even a modded esteem.Rather an esteem can be built with half of what you'll spend on a Astra and have more fun.

Last edited by dinar : 4th May 2009 at 12:45.
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Old 4th May 2009, 12:31   #21
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No.

In SPFI, the fuel is injected in the throttle body or in a single location inside the intake manifold. In MPFI, the fuel is injected just above the intake valve, in the intake port.

It is in Gasoline Direct Injection that fuel is injected straight into the cylinders, like diesel DI. This is the latest injection technology for petrols. Audi's FSI engines are an example.

EDIT : dinar ninjaed his post while I was writing mine.
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Old 4th May 2009, 23:36   #22
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Quote:
Originally Posted by dinar View Post
the mods give it a hug bump in power, the India version had a 8 valve engine there wont be a big difference.So if your not looking for big power outputs and do not mind the cost of engine parts , go for it. but if your looking at figures to match even a modded esteem.Rather an esteem can be built with half of what you'll spend on a Astra and have more fun.
I did not know Astra were 8v in India. Then it may not be worth spending a lot of money modding it. Do you guys know what engine came in the Astra?. I am sure it was probably phased out in Europe half a decade before launch in India.

My corsa apparently has 16v X14NE engine in it. I cant find any info about it on google or any other search engine ! I desprately wanted an imgage search, just to check which other country got this engine.

Technicaly speaking I am being told the opel x14xe is the closest to Indian engine and is a popular engine in Europe. Launching phased out Engines in in India is probably one of the reasons that made the brand a failure...

They are amazing cars, highest sold cars in UK, like the Maruti in India !
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Old 5th May 2009, 23:33   #23
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The corsa engine has 16Valves not the Astra. That why it produced 77 PS from 1.6L engine. By the way it's the 16NZR engine in ASTRA. the compression of 8.8:1 was good for turbocharging, but as I said not worth the effort, unless you can get a 16V head for the engine.
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Old 6th May 2009, 15:22   #24
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Alright thanks a lot for the replies. One more doubt. What is compression Ratio? Is it the BDC and TDC ratio? Is higher compression ratio favorable for higher performance?
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Old 6th May 2009, 17:41   #25
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Quote:
Originally Posted by dinar View Post
The corsa engine has 16Valves not the Astra. That why it produced 77 PS from 1.6L engine. By the way it's the 16NZR engine in ASTRA. the compression of 8.8:1 was good for turbocharging, but as I said not worth the effort, unless you can get a 16V head for the engine.
Do you know that a 16v head will fit on the older block?
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Old 7th May 2009, 01:45   #26
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Quote:
Originally Posted by Torque350 View Post
Alright thanks a lot for the replies. One more doubt. What is compression Ratio? Is it the BDC and TDC ratio? Is higher compression ratio favorable for higher performance?
High compression ratio help is N.A. engines but fuel quality has to be good , lower compression engine can handle low grad fuels like 87 octane. In a turbo build a low compression is good.

Quote:
Originally Posted by Mpower View Post
Do you know that a 16v head will fit on the older block?
I think it possible as the same block had 16Valve head later in the European markets, we always got the oldest engines and body styles [the discontinued once]Also I had heard of such conversion but not in India.
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Old 7th May 2009, 02:09   #27
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Quote:
Originally Posted by dinar View Post
I think it possible as the same block had 16Valve head later in the European markets, we always got the oldest engines and body styles [the discontinued once]Also I had heard of such conversion but not in India.
Normally in Europe they don't mod the engines on the MK3 Astra, they swap it with a Vectra.

Visit MK3OC - Vauxhall Mk3 Astra Owners Club to see various guides for mods as well as many members car dairies with detailed swap guide.

I have two Astras in my stable one 2002 one 2003 both have x16ne engines.
Haven't been able to locate these engines being sold in any other market except India. It produces 96.5 bhp and have touched 190 kmph top speed on both. Acceleration is nothing to boast about but ride high speeds is beautiful.

I have toyed tremendously about modding one of these cars but after months of research just can't find the justification, unless you are ready to spend atleast 3-4 Lakhs and then too an OHC with the same amount spent on mods will run rings around it.

It's just not worth it!
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Old 7th May 2009, 11:08   #28
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Hi Indian1979. Well its nice to know there is another person out there who has modded the Astra. You have been there and done that. Our budget was around 2 Lakhs. So let me ask you one simple question. Shall I go ahead with the "Astra Project".

I still don't understand what compression ratio is guys. Please help me
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Old 7th May 2009, 11:22   #29
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Compression ratio - Wikipedia, the free encyclopedia

Read it and be edjumacated

A higher compression ratio extracts more energy from the fuel, but it requires higher octane fuel to work to resist detonation (knock/ping). A lower compression ratio helps when you turbocharge your vehicle.
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Old 7th May 2009, 12:05   #30
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Thanks ImmortalZ. Well its pretty clear now. Totally forgot about Wikipedia!
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