Knowing that the Evo's max boost pressure is 19psi that kind of seems high doesn't it? I mean even the WRX is below 15 stock. With this high of boost doesn't it make tuning that much harder?

 

I was reading on how the stock turbo on the new EVO VII can handle 3bars no problem

 

Where did you read it at. Come on, Im chompin at the bit to learn as much as I can. Yes, the goal to become Einstein of Evo

 

2.0 bar is MEGA boost. I doubt that the fuel system would be capable of handling that stock?! Running that high of boost are there any viable options to run that on the street w/o race gas? I've heard water injection and propane injection.

Any thoughts?

With 19psi at WOT at 3500rpm...this seems like it should be high enough to have a total hp of close to 300hp..maybe with an ecu swap?

 

u say it loses efficiency at 1.8 bar. what would that b in psi?

 

I think 1 bar = 14.7 psi, so 1.8 bar is just under 26.5 psi.

 

id like to mention something that cladius did not.. you cannot.. i repeat cannot run 23psi on pump gas regardless of fuel and engine management upgrades.. (especially in ca) only way you can run that high is with race gas..
--bobby

 

What about Sunoco 115? I live about a mile from a small airport.. Mostly piston engine planes.. I used to run that in my race car but it was leaded gas at the time, and I still mixed it with 93/95 octane premium.. There's always unleaded cam2 at $5 a gallon..

 

if the sunoco 115 is unleaded you should be okay.. the problem that people encounter when running leaded fuel is that it destroys the catalytic converters and ruins some sensors over a relatively short period of time (o2,etc).. at least thats how it is for the wrx..
--bobby

 

Can you run that high of boost and just retard the timing so that you can run on lower octane, albeit at a lower power level than not retarding timing?

I'd like to know how far I can take this car and still use pump 93. I want a street-legal terror, but usable for a Sunday drive if I want.

Also, would using a water injection help me to run at pump octane levels and that high of boost?

 

In my DSM i never ruined any cats with running leaded race fuel. It will though from my experiance put a hurting on your O2 sensor over the long run. I have made about 40 dragstrip vists without any damage to my O2 sensor. I have seen them go bad in friends DSM's though.

 

I'm wondering on what engine that is? Also what turbo, fmic, A/F ratio, timing advance, etc.?

I'm wondering the same things... You must be refering to the EVO8's stock turbo.

Have you guys datalogged anything to confirm these comments? Just curious because I run 22 psi on a slow day on 91 octane just fine, but I have a bigger, more efficient turbo and a big fmic.

Also, never, never assume HP based on boost pressures! It's all about the lbs/min you can breathe efficiently. Check out a compressor map and find out how many lbs/min your hairdrier spits out at your "selected" pressure ratio. Then figure if the turbine side, exh mani, head, etc. can actually breathe that much. Then you'll basically know.