Astra g 2.2 Sri engine modification and tuning

Monkeybear7

Member
Joined
May 9, 2021
Messages
4
Hi.

I've just bought my second 2.2 Sri. I'm looking to maybe make some more power from the engine. Not after massive gains but would be nice to see 175bhp plus. What would getting the head ported and skimmed gain? Any suggestions would be appreciated.

Chris
 

corsaZ22se

Senior Member
Joined
December 12, 2012
Messages
2,413
To get to that power you will need cam's, flowed/ported head, full exhaust with a 200cpi cat, panel filter and a remap. If the engine is healthy it should make that kind of power.
However the cost of all that will be more than fitting a basic supercharger build which will see you into the 250bhp mark and over 200lbft of torque.
 

Monkeybear7

Member
Joined
May 9, 2021
Messages
4
To get to that power you will need cam's, flowed/ported head, full exhaust with a 200cpi cat, panel filter and a remap. If the engine is healthy it should make that kind of power.
However the cost of all that will be more than fitting a basic supercharger build which will see you into the 250bhp mark and over 200lbft of torque.

Hi mate.

Thanks for the reply.

Would i not do all this anyway before fitting a supercharger? Which supercharger kit would I need? Sorry for all the questions I'm a total newbie to car modification.

Also struggling to find a garage near me to do the work. Anyone know anyone in/near East Yorkshire?

Chris
 

corsaZ22se

Senior Member
Joined
December 12, 2012
Messages
2,413
With the supercharger you will get those gains on a good stock engine with a decent exhaust system. 2.5" works well.
Mine with a flowed head and full exhaust with the DBilas manifold and 200cpi cat went over 280bhp first time on the dyno! only safe to 270bhp max so it was restricted back until I forged the bottom end.
Max88 performance (Aylesbury, Bucks) sells kits as does Jeffery Reyland Nelson but he is in USA.
evocarlos aka Carl Evans can fit it for you he is somewhere in the midlands area? Courtenay Sport are the only ones in the UK who can map a Z22SE with standard ECU, they are in Norfolk.

The super charger kits to buy and fit yourself then have mapped comes to about £1500 all in
Decent cam kits will set you back £700-£1000 alone and still need mapping to get the gains, and still you will only get to 170ish with a flowed head as well.

My advise would be to get it well serviced, replace full exhaust system including the manifold then meet a few people with supercharged 2.2's. It's the cheapest way to gain power on these engines.
 
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