OK, several EVO owners have been furiously (no pun intended) modifying their cars with all kinds of performance up-grades...

I'm very interested in hearing the results of those who've opted for the Vishnu XEDE... How's working so far? is the power increase holding up? any funky ECU reactions? I'm very interested in a piggyback type mod such as the XEDE, but I sure would like to know what the folks who have are experiencing as time passes.

I'd also like to see some of the other AFCs and such summarized. It would be most useful to see what the longer term results are of all these things. It also would be nice to know more or less what HP gains to expect with various degrees of tuning. I'm intersted in modifying my car with:
1. catback
2. XEDE (or alternative piggy back w/ boost control)
3. K&N or equivalent

I'd like to know what gains to expect with 93 octane gas and those mods. I'd be most gratefull if those of you with experience would share your knowledge.

Thanks a lot,

Manuel

 

For a few results on XEDE tuning check out:
https://www.evolutionm.net/forums/sh...threadid=24551

Mark

 

Thanks Mark,
That's a useful post. I'm still interested in the XEDE because it claims to control fuel, timing and boost. This being the case, I'm saving the $$ and hassle of a separate EBC.

Of course, I still don't know if the EBC is a mandatory mod to get the higher power that some get with the SAFC.... Also, at the risk of sounding negative, I'm still wary because I had a bad experience already with the TurboXs Unichip in my WRX... I realize that those are not the same thing as the XEDE or SAFC, but still, I'm looking for reassurance that I'll not experience the same problems (driveability, ECU re-adjusting to compensate for the Unichip).

Thanks again for the input, I hope more folks will post with their experience so I can make an informed decision.

 

Have you read the threads on Vishnu Stage 0 mods? The Vishnu Stage 0 includes the XEDE. It seem to have pretty good review.

https://www.evolutionm.net/forums/sh...threadid=19440
https://www.evolutionm.net/forums/sh...threadid=25250

 

So far, I have 0 driveability problems with the XEDE. I highly doubt anyone will experience an issue with a system like the XEDE or even a reflash as they allow the stock computer to operate. My car still has a very stock driving feel to it, but it's much more powerful now... especially up top.

From seat of the pants, I don't think there's any way the ECU has re-adjusted anything as the car pulls just as strong. I may re-dyno just to see though.

Mark

 

My 215WHP was accomplished with the EXDE, and catback as you see from my review above (https://www.evolutionm.net/forums/sh...threadid=25250). I was running 91 octane and stock boost. PM me if you have specific questions.

 

The thread sort of stopped a whle back. There was not much more in there than was originally posted except for more questions the last time I looked (I think it was this morning). I'd love to hear more about what is going on now after the mods have been operating for a week or 2. Even Al stopped posting on his eManage tests..... As I said before, I'm very interested in discovering the longer term results of some of these mods....

 

Sounds promising, what octane gas are you running? I'm going to look at the post you refer above, but can you tell me your mods?

Thanks,

Manuel

 

Here's my current setup:

93 octane
Vishnu full exhaust
XEDE

Mark

 

can the Xede take advantage of an Open air element?

 

My car has the same set-up as Mark:

XEDE
3" Vishnu Full Exhaust
93 Octane.

Numbers are posted in the Vishnu Threads and the MD Dyno Day threads already linked.

Performance is the same as the day Shiv tuned it. Absolutely no drivability or other quirky ECU issues or side effects.

I am looking forward to the next firmware upgrade which will add the EBC functionality to the XEDE. Once fully tested it will be a free download along with other available maps from Vishnu's web site.

An SAFC and EBC will get you the same peak performance numbers but I doubt that overall drivability will match that of the XEDE tuned car because of the XEDE's capability to exploit more of the factory mapping parameters than the SAFC/EBC combination.

The XEDE and exhaust combination fulfilled my performance requirements by significantly improving drivability through a very linear application of an additional 37 WHP while retaining stock-like reliability.

Based on current offerings, my future engine performance modifications will be limited to XEDE firmware upgrades adding additional functionality and features as they become available.

I will consider additional engine modifications if and when a future Stage upgrade is available offering an additional 20-30 WHP while preserving the current level of reliability and drivability.

 

Shiv has reported no appreciable performance gains to the Stage Zero kit from modifications to the stock intake setup to include both drop in filter panels and open air elements. He told me not to bother. This will change over time when the factory intake becomes the limiting factor in extracting more power. I would anticipate specific products to be offered in Stage One, Two, Three, etc...kits, after thorough development and testing, that will achieve the desired performance iincreases for the next level of performance.

 

Geeze, anybody ran it in the 1/4mi? Only one way to find out how much faster.

 

I've yet to hear of anyone posting a slip... where as it seems everyone else modding the Evo posts slips as soon as they get them. Now don't get me wrong, I'm not a fan of drag racing (I also hate NASCAR)... it is just the accepted American measure of power.

 

My Evo had first Stage O (after Shiv's) and has always been perfect. Subsequent dyno tests (after 1000 miles+)showed no drop in power before I did addl. mods. No driveability/ping/knock etc. issues ever.

From what I understand, Shiv's car with very few addl. mods beyond Stage O ran 108 in 1/4 mile in recent Car and Driver shootout & comparison tests in LA on certified 91 octane. Article to come out in upcoming C&D.