As stated above, with the previous post, if your looking for both power and reliability, then a 50/50 mix is your best bet. If your looking for straight power, then all meth is your bet. I am running a new drag series that will not allow meth inj, so I will be running 100% water injection. This will not yield as much power, but will increase realibilty 10 fold. It increases power by acting as a engine diplacement adder. It eliminates all carbon. It keeps the apex seal cool and lubricated helping to prevent warping. Hope this helps.

 

Personally, I would run water injection on every turbo car regardless of boost level. I look at it as cheap insurance against bad gas and carbon buildup. Is it necessary on a <15 Psi rotary? No. Does it have many benefits even for a low boost street car? Absolutely. And if you go with a mechanical system like mine, it doesn't use any pumps so it's a very simple setup with not much to fail. Course even if it did fail on a 15 psi rotary it won't be the end of the world.... or your engine.

 

A GT42R at 14psi isn't going to make the same power as a T04Z. It all in the Efficiency range of said turbo. If you only plan on running 1 bar of boost, then a smaller turbo with a broader power range is what you want. That said, throwing water/meth injection will give you a great reliable setup.

 

OP never wanted a better power band.

HE just asked whats "more better" for the engine. I think he means reliability.

ANd he only gave 2 choices. to4z with 1 bar. or smaller than to4z with 1.5 bars

 

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Yes, calling someone ignorant, stupid, dumb, etc are personal attacks. It stops now.

 

thanks a lot guys,even if all these appear to me like Chinese you are far away from Greek tuners,50 years in front of us.Here in Thessaloniki Greece we use 100 oct. gas sometimes we add a bottle of stp to increase the number of octans and we often have problems with our engines.I 'll try in the future the tuners in the city of Athens i've heard that the know a bit more things from us (Thessaloniki 15 rx-7s Athens 150 cars maybe).Thanks again.

 

I think the ones in Thsellanoiki are too busy playing yoville farmville and other facebook games lol

 

You are right Alper ,the problem is small with the mechanics but huge with the programmers for any after market ecu as pfc.

 

When you come to Turkey, we'll visit a few shops with you and see what we can do here

 

O.k