[Vegashybrid]

All depends on what your power goals are. The mitsu is going to spool faster and have less lag too

 

[Vegashybrid]

Good to know. Honestly I'm just looking to run a full PRL setup (FMIC, downpipe, frontpipe), Thermal exhaust, big turbo, and 93 octane

Was basically going to let D Rob go to town with it

The goal is to get a good amount of power gains without absolutely destroying reliability. Thinking I can reasonably aim for 350-375 HP and get that

If the MHI is more efficient in general I may just go with that

Personally I would go with the bigger turbo. Yes you will get a little more lag, but overall you have more room to work with, and if your not pushing it as hard it will run cooler. Didn't realize both were Mitsubishi turbo I don't keep up with this stuff like I used to. I heard PRL and upgraded turbo didn't realize they made an upgrade slightly above the ctr turbo.

 

[Vegashybrid]

Thanks for this, so it seems like the MHI stage 2 is larger in general then but with less blades

I wonder how each compare in terms of efficiency of power delivery... as in which will be able to do more with less if that makes sense

Number of blades is not really important look at the size difference of the wheels. Lag should be a difference of a few hundred rpm.

 

[Vegashybrid]

I've heard that you can increase the inside diameter on the fuel line's flow restriction to help with this somewhat

Band-Aids at best. Someone needs a high pressure fuel pump upgrade to further advance this platform is my guess. Upgrading the regular fuel pump will only do so much in a di engine.

 

[Vegashybrid]

I would look into Integrated Engineering and Autotech for hpfp upgrade, especially IE. IE will custom build it for you at the least just send them a core from a junked car. Their work is phenomenal.

 

[Vegashybrid]

So I don't think the issue is making a physical pump, it's more that the ECUs won't use it

Yes you would need tuning for it but that should be easy.

 

[Vegashybrid]

They are def there somewhere if they too the time to look for them.

 

[Vegashybrid]

Yes a stand alone is needed. Nobody has done it yet on this platform. The limits have been met at this point.

No it's not the stock ECU is already controlling it. Someone need to find the parameters and . modify them properly just like ktuner and hondata do already. The mechanical limits may have been met but not the ECU.

 

[Vegashybrid]

I guess Hondata hasn't figured it out yet, see that forum post above

Simply because there hasn't been a need until recently. This platform has only been around a few years. The stock pump obviously flows very well if people aren't running into problems until close to double the factory power output. Early VW applications with di need pump upgrades just to get the most out of the factory turbo and injectors. So the tuners needed to find a solution early on for those vehicles. Modern ECUs are very sophisticated in advanced. Adjusting hpfp settings are definitely more complicated as fuel pressure/supply rises with RPMs, But it's still really not that big of a deal once you find the parameters in the ECU and you know what you're doing. As more development is done in this platform either someone will find a workaround/fix, or will be the limiting factor for the platform and people will move on to something else. Either way only time will tell as they are just now exploring the options for this motor.