posted on February 09, 2011 00:00
Project Mitsubishi EVO IX Part 6: More power
By Mike Kojima
When we had last left Project EVO IX we were in the good hands of Eric Hsu and XS Engineering but a number of events occurred that stopped our project dead in the water from an engine development standpoint. Eric decided to scale back operations of XS Engineering, getting away from retails sales as many of their products were getting knocked off by Chinese companies such as XS Power who even knocked off their name. XS Engineering became a very small company servicing an exclusive clientele for custom projects and Eric moved to Cosworth where he is today. Unfortunately we lost access to their AWD dyno and the great XS Engineering products we tested were no longer available.
Read More About Project EVO IX here!
So we had to back up a little and relaunch our engine series getting help from our friend Naji Dahi and his company Looney Tuning. We have known Naji many years from road racing as Naji is an avid racer. Although Naji races Nissans he has gained a good reputation as a tuner for EVOs and WRX/STIs. Naji uses the open source tuning resource ECU Flash to tune to good effect. Data for tuning is logged via another open source resource for EVOs called EVO Scan.
|In our previous segment of messing with Project EVO's motor, we had run out of injector. So we replaced the stock injectors with these 1000cc parts from RC engineering. Now we will have injector headspace for whatever we can dream up.
As a dyno Naji uses a software package called Virtual Dyno that is set up for a car's particulars such as weight, tire size, gear ratio and calculated drag. 3rd gear pulls are done along a controlled road with a nearby weather station for adding ambient condition data. The Virtual Dyno software automatically calculates horsepower and torque from data extracted from EVO scan output. Note that this uses actual logged RPM data and thus calculates power exactly like a dyno does, not using an accelerometer which is dependent on the calibration and accuracy of the accelerometer.
|The deflected disc metering of the RC Engineering injector on the left gives much better atomization than the typical pintle valve of the injector on the right. This helps the RC Engineering injectors have good part throttle driveabilty and idle even though they are pretty large.
Wednesday, February 09, 2011 7:38 AM
1. (Life Sciences & Allied Applications / Anatomy) the testicles
by the balls: so as to be rendered powerless
2. nonsense; rubbish
3. Port matching an intake manifold while it's still mounted on the car.
I expect to see that in "why is my car running rough?" noob forum posts but clearly the Technosquare guys have some skillz. Two thumbs up.
Wednesday, February 09, 2011 9:05 AM
Laziness takes many forms. Some people would pull the intake to make it easier to port. Technosquare decided it was easier to lay across the engine and do it in the car. That's my kind of lazy! And hey every crazy fast car has some kind of bling on it, even if it's not intentional.
Wednesday, February 09, 2011 10:21 AM
I never did get to see this project when it was in the magazines so I'm looking forward to seeing the results of adding the Cosworth cams. Managing these solid gains on California pee water is not easy.
Wednesday, February 09, 2011 11:09 AM
Time warp...I was over at XS the other day. They are doing a ground up build of a BCNR33 GTR drag car at the moment. Sometimes that kind of stuff is funner...
Mike, let's go to lunch and discuss the IX. Cosworth has even bigger cams now for people with balls.
Wednesday, February 09, 2011 11:45 AM
Ya know..... bigger cams should go with a bigger turbo...
Wednesday, February 09, 2011 12:12 PM
"Mike, let's go to lunch and discuss the IX. Cosworth has even bigger cams now for people with balls."
It's cool to have friends like Eric!
My path to insanity started when Mike said one day "Do you want to go fast or suck!?!?"
Wednesday, February 09, 2011 12:34 PM
Cosworth M3 280in/272ex for me on my IX... nice write up...
Wednesday, February 09, 2011 2:58 PM
Mike, I hope you're not getting any carpal tunnel with all this typing as of late!
Now, why don't all intake manufacturers like ARC have some flow rate (CFM) tests and numbers out there to better evaluate there effectiveness and offer comparison points for the consumers between intake manufacturers?
I've always wondered about ARCs choice of aluminum as opposed to carbon fiber in preventing heat soak, nice to see you help avoid ambient temperatures with the weather stripping.
Wednesday, February 09, 2011 7:02 PM
Khiem: Bigger cams should go with a bigger turbo in general, BUT it really depends on the parts you have (mainly exhaust flow) and the type of fuel you are using. 91 octane limits things of course, but I think Mike is running meth injection which changes the entire story.
Matt: M3s are my favorite 4G63 cams for all around usage. Good choice in cams!
Wednesday, February 09, 2011 9:38 PM
Eric, I'm just trying to be a bad influence ;)
Wednesday, February 09, 2011 11:12 PM
oh i get it...that's a good one haha.
Thursday, February 10, 2011 11:22 PM
How much for those 1000cc parts from RC engineering?
Thursday, February 10, 2011 11:38 PM
You can start by following the linkls at the end of the article.
Friday, February 11, 2011 10:15 AM
I noticed the ARC radiator setup. Can you talk a bit about it or will this come up in a future article?
Friday, February 11, 2011 12:52 PM
Friday, February 11, 2011 4:49 PM
Thanks. That one missed me.
Sunday, February 13, 2011 1:53 AM
Mike- are you still bouncing off the surge line on this car? I might havesomething for you to tinker with.
Have you considered visiting the 90 vs 45 deg IC pipe urban legend on the EVO and going battery relocate? I have all varieties of pipes you can borrow.
Sunday, February 13, 2011 10:54 AM
We managed to get rid of 80% of the surge by limiting boost to 21 psi or so below 4000 rpm. Do you think that is going to improve flow enough to prevent surge? I don't think its going to make any difference at all unless you have other experiance that it might.
Sunday, February 13, 2011 11:10 AM
NO, the IC pipe change won't do anything for surge. Just curious to have some real data behind it. We make both pipes just to appease people. However, the 45 has less stress and better coupler clamping area so they tend to blow off less than the 90 degree type, which is why we went to a reducer on that part.
On the surge, I'm wondering if adding a little choke to the inlet by way of a 2.5" inlet tube vs the standard 3" with a reducer to the compressor inlet would help. Our IC pipe kit guys don't seem to have the surge issue with our kit design, but it might be worth checking out.
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