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Discussion Starter #1
This may be really obvious, but how does an induction kit increase BHP on a turbo engine. On a normally aspirated engine you rely on the engine induction to suck the air throuth the filter mechanism. But as turbo engines have forced induction, how does this help?
 
G

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The function of the air filter on a turbocharged engine is no different to a natuarally aspirated engine, it's just the turbo is sucking the air in rather than the engine.
 
G

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Turbos are all about getting more air into the engine at a faster rate.

An induction kit helps a turbo engine more than a normally aspirated engine, as any gain in air flow in exaggerated by the turbo. Induction kits also add a bit of noise. I put a Blitz Sonic on my last car and it sounded REALLY loud.

Obviously all that extra gas and combustion needs somewhere to go, so improved exhaust flow also makes more of a difference than a non-turbo engine.

To cap it off, the colder the air that goes in, the more dense it is, and therefore the better the effect. That's why its good to include a bigger intercooler (with water-sprayer if the weather's hot!), and to route air into the induction kit that has not been circulating around the engine bay can help.

So, in really broad terms, if you add an induction kit for better airflow, you will gain 5-10BPH, if you add a bigger intercooler, you will get another 5-10BHP, and if you add a free-flow exhaust (the Cat is the biggest restrictor) you will get another 5-10BHP. On my old Evo, I did all of the above, and bypassing the Cat made the most noticeable difference in power, as the boost came in much earlier and the power band much wider.

There are limits however, and the mixture can get a bit lean in some conditions, which can be bad news, as the temperature increases. To avoid this, you need to get a remap, but I would say it is unlikely to be a major problem, esp if you use hi-octane fuel.

Dave
 
G

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Hi Andy 'safe' depends partly on you!

I'm sure the engine can take it ok.

Why stop at 300?

Dave


andy bassett said:
thats exact wat iv done on mine, IK bigger cooler and zorst and the bhp has gone from 222bhp standard to 249bhp,
am hopeing if some one finaly does a remap fpr a E4 engine and a decat ill hit 300bhp or just over and be able to run it safe at that.
 

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well im stuck at 250 for the mo cos no one does a map for mine yet, well a fully working one at least, and wen a decat is availible it will be going on with or with out the map which should take it to around the 260 mark, then with a 40bhp or 50 bhp map i should hit 300 or just over :D
 

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Don't forget the nos andy, got some coming from the states! :twisted: :twisted:
 
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