EVO X Project

[Chris Ullmann]

OK, I have just purchased an EVO X a few months ago and have only put an AEM intake on it so far. I just got the tactrix cable and have Evoscan for logging. I have a wideband on the way and will start logging that soon too. Any thoughts on some good reading for Evoscan? Any of you guys familiar with it? I have a couple of 3rd gear pulls if any of you are intereseted in looking at them?

I would like to see what kind of power I can extract with some simple bolt on's and some tuning? I plan to get the Grimmspeed 3 port boost control Solenoid and maybe a 3" turbo back if I find one at the right price?

[Chris Ullmann]

So my first question is that if I log MAP and convert kPa to Psi, that is my boost reading? If so, I am reachng about 18psi at full throttle and it holds till redline. That sound right? I hear of cars hitting 21 psi stock?

Log attached has 3rd gear pull at end of log...

[Motohead1]

Yep you have enough fuel stock to run 21+psi. I dont have my EvoX definitions in front of me but your gonna see gains with cam timing and with a nice 3 port BCS like your talking about.

Ill take a look at that log tomorrow. Do you have a good definition file for your EvoX in ecuflash? Last time I looked at a 10 the definitions where still not up to speed. They probly are by now though.

[Motohead1]

Also before you do anything make sure you enable mode23. Looks like the Tephra mod is fully defined now for the 10. Use that. There is a few good write ups linked on Evom.

[Chris Ullmann]

Thanks for the feedback, and I am hoping to learn a good bit with forum input and advice. I have not opened ecuflash and only used evoscan to log so far so no go on the good definition file.

I have a lot to learn about ecu flashing and was hoping to spend a little time with someone to learn basic functionality of the software before I go and start adjusting things. I have not done the mode23 mod yet as I am not sure how to fully use it. I understand it allows you to specify logging any parameter the ecu uses as long as you know the location you want to read. I just don't know where to find that type of info yet. I'll do some more reading on it before I go any further.

I will have an AEM UEGO wideband by Friday and will have it up and running as soon as I can locate someone to weld it in. I really wanted that up and running before I did any modifications to the ecu.

[Chris Ullmann]

Anyone know of any advantage using a grimmspeed 3 port over the GM 3 port model? Beaides appearance and metal hose barbs? Is a MAC valve that much better than anything else? Part number for GM boost solenoid?

Edit: found part number

[Chris Ullmann]

Well, I got everything going for evoscan and ecuflash. I was able to get an AEM UEGO (installed in the rear o2 cat position) datalogging AFR. I am seeing mid 10's on 3rd gear pulls.

I have also loaded the JDM MIVEC tables and raised the boost. I am seeing about 26 psi peak dropping off to 17 psi at redline. I am seeing about 2 counts of knock right at throttle lift/redline.

I will attach the log for anyone who wants to review...

Looking for thoughts on extracting more power? More timing/less boost? Less fuel?

Finally, any thoughts on the WB being in the rear o2 position? Being the middle of the cat, is it going to get too hot there? I would think it was fine as the factory sensor sits there but maybe it is ok because it is of different construction?

[Motohead1]

Leave timing alone just lean it out a bit and see if the knock count changes alot. It would be best to put a bung closser to the turbo for the wide band. just to confirm your not getting an inflated reading.

[Tuan]

Your WB needs to be in front of the cat. And remember, LEAN IS MEAN.

[Chris Ullmann]

Thanks for the input Tuan and Jay. I got a downpipe and test pipe on the way so I'll eliminate the cat issue. Not touching anything further, tuning wise, till that's done as I want to make sure I have an accurate reading. Either of you look at the log by chance? See anything that stands out?

[Chris Ullmann]

I'll share more later but ran a 13.1 yesterday in 95 degree weather. I think this car will run a 12 sec 1/4 as she sits! Very happy so far...

[Chris Ullmann]

13.1 run datalog file.

[Chris Ullmann]

Well, got the downppe and test pipe installed yesterday. Noticed that the wideband is much more responsive now. Before, at cruise, it would hold fairly steady but now it bounces back and forth from about 14.7 to about 15.2 in a manner that reflects the narow band "blinky" gauges.

I plan to log some pulls tonight to see what looks different from before. I expect my wideband to show some different readings and be able trust those readings as being more accurate. I think I may see possible changes in boost response time. I'll post logs for those who may be peeking into this thread and just not saying anything.

I am also starting to play with some settings for launch (stutter box). Goal is to be in the 12's next trip to the drag strip.

I am also planing on using it to get a good start out of the gate at the next time attack. I want to figure out how to log the AWS system to see what is happening as I run one of these time attack events but that is not a priority yet.

So once I have maxed out the setup as it stands, I am thinking boost controller, intercooler upgrade or cat back. Not sure what really is needed first?

Are one of the 3 ports really going to give me better control over boost than using the stock BCS and ecuflash? Is it going to allow me to hold boost at higher rpms? Basically, will it elimnate the fall off in boost I am seeing now? If so, that appears to be the best bang for the buck. I can get that, raise the boost, and start tuning a race fuel alt map?

I am also not familiar with what is considered good temp reductions for an intercooler. I know that the turbo heating up the air plays a significant role in this but just need to search for some more info... If any of you can point me to a link where someone has tested stock X intercooler compared to aftermarket, then linky away! I got OEM temp differneces logged already, just curious what something like the AMS unit will do.

Finally, am I flowing anything near what may require a cat back at this point? I really want to keep this car stock looking and sounding if possible. I know Marco has dynoed his Ralliart (Modfied Mag) at the 350whp range on stock exhaust. I do not think that is a stock turbo though? I think I answered my own question here.

Ok, enough for now...PEOPLE, CHIME IN, I'M ALL ALONE HERE

[Tuan]

My $290 intercooler increase ~2-3 deg at 18psi on a 3rd gear pull in this weather.
~10deg at 30psi. Much better than the previous liquid to air.

[Chris Ullmann]

Where are you taking your measurements Tuan? Is that inlet and outlet tank temps?

[Tuan]

Originally Posted by Chris Ullmann

Where are you taking your measurements Tuan? Is that inlet and outlet tank temps?

The ait sensor is ~6" from the throttle body. I don't have the delta across the intercooler, but the small temperature increase during a long pull is a good indication that the cooler is doing its job.

[Chris Ullmann]

Originally Posted by Tuan

The ait sensor is ~6" from the throttle body. I don't have the delta across the intercooler, but the small temperature increase during a long pull is a good indication that the cooler is doing its job.

Good point, didn't think of it that way.

[evoX]

I haven't been on here in forever and just came across your post . If you have any questions of need help with your car feel free to ask .

[Chris Ullmann]

Sooo, I have had the downpipe and test pipe installed for about 2 months now. Car has been running good until today. I got on it in 2nd gear and it fell on its face. Felt like a boost leak but the logs showed that couldn't be the case. The boost was no different than previous logs and it was going super lean (16's) under full throttle.

After a quick survey, I found out the vacuum line coming off the FPR had come loose. So, clamp time and hope to never see this issue again.

Has anyone hard wired the oem pump on an Evo X? Any potential issues besides the noise? Will the higher voltage cause premature failure?