Welcome to the North American Subaru Impreza Owners Club Thursday July 10, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Reviews > Car Part Reviews

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 11-26-2001, 02:03 PM   #1
mpj_becks
Scooby Specialist
Member Sales Rating: (3)
 
Member#: 6265
Join Date: May 2001
Chapter/Region: BAIC
Location: Hayward, CA
Thumbs up Vishnu Performance Unichip

Firstly this is not a review of the Vishnu Performance stage 0 as my mods put me into a kind of Stage 1 zone. Here are my mods.

Unorthodox Racing crank pulley.
Scoobysports downpipe and front center section.
Cobb Tuning Catback.
Brullen uppipe.
Samco intercooler hoses.
ITG panel filter.
MRT intercooler spray kit.

Prior to the installation of the Vishnu Performance Unichip I had a TurboXS Unichip and harness installed.

Whilst my previous setup was fine going flat out at high RPM’s I had some major concerns with extreme high levels of boost when go WOT at low RPM’s this coupled with the “peculiar” driving characteristics at partial throttle made me start looking for an alternative system. I think the TurboXS system was far better suited to drag style driving which for a lot of people is fine. However I drive in heavy traffic conditions a lot and the part throttle drivability is really important to me.

Anyway, The installation of the Vishnu Unichip was a no brainer (especially when it’s done for you  - thanks Shiv!) yes four or so wires were cut but when everything is installed back into the footwell you barely notice it. The MBC (again installed for me – thanks again Shiv) is a simple task.

There was no real tuning needed for my setup as Shiv already had a map for a system similar to mine and I plan on a few new mods that require a full dyno tune so the fine tuning (not that it is needed right now anyway) will be done on the dyno when the new mods are in.

Well the drivability of my car now for lack of a better work “outstanding” All of my part throttle concerns have been addressed, I would say the car drives like stock but faster but I don’t think that would be right. My car now drives how it should as stock! There is virtually no lag at all, 15psi hits and the car flies in all gears!

I can get on the throttle in any gear at any RPM and the boost just hit’s 15psi then tapers just a little towards redline, there is no spiking above the built in ½ - 1psi spikes seen in the stock system.

For those of you concerned about the part throttle drivability of these systems from some of the recent posts all I can say is don’t be, this setup to me drives better than stock with more power!

As for a comparison to the TurboXS setup, The TurboXS setup seemed to be great for out and out racing and the harness is great, like I said before the part throttle stuff is where there is no comparison, the Vishnu system has it. Overall power would be a hard comparison but the Vishnu setup felt stronger to me.
* Registered users of the site do not see these ads.
mpj_becks is offline   Reply With Quote
Old 11-26-2001, 02:59 PM   #2
Austin
Scooby Guru
Member Sales Rating: (1)
 
Member#: 7089
Join Date: May 2001
Chapter/Region: NWIC
Location: Western Wa
Default

Do you have an egt guage?
Austin is offline   Reply With Quote
Old 11-26-2001, 03:03 PM   #3
WRX-ellent
Scooby Specialist
Member Sales Rating: (0)
 
Member#: 9071
Join Date: Aug 2001
Location: SF Bay Area, CA
Vehicle:
2002 WRB Impreza WRX
FMIC/1820 inside & Link'd

Default

Thanks for the review mpj... This was one of my concerns as well. I was thinking of going with TXS but I wanted someone local to me and Shiv is just that, he is local to me. I have an appt with Shiv sometime this week and I can't wait. Thanks again.

~joe
WRX-ellent is offline   Reply With Quote
Old 11-26-2001, 05:25 PM   #4
hkwan
Scooby Specialist
Member Sales Rating: (0)
 
Member#: 7536
Join Date: Jun 2001
Location: San Jose
Vehicle:
2005 WRX STi

Default

ttt
hkwan is offline   Reply With Quote
Old 11-26-2001, 06:57 PM   #5
scotto
Scooby Specialist
Member Sales Rating: (0)
 
Member#: 3635
Join Date: Jan 2001
Location: Aliso Viejo,CA
Vehicle:
2002 WRX Swagon
Platinum Silver

Default

mpj,

How is it in traffic? Is it quite easy to modulate the power? I have driven in a boost controlled WRX that seemed to just want to take off- surge, which seems un-traffic friendly.

EGT would be nice to know if you have the gauge.
Especially any good uphill grade readings.

Nice review though.

Scott
scotto is offline   Reply With Quote
Old 11-26-2001, 10:54 PM   #6
mpj_becks
Scooby Specialist
Member Sales Rating: (3)
 
Member#: 6265
Join Date: May 2001
Chapter/Region: BAIC
Location: Hayward, CA
Default

Austin - Yep I have a EGT gauge, I have spent so much time looking at the boost, EGT and knock gauges it is a wonder that I have not wrote my car off!!!

scotto - The car drives "to me" the same if not better than stock in heavy traffic conditions.

Funny you should ask about the EGT and up hill loads, I did some extensive testing and the highest I got was 840c at 50mph part throttle in 5th gear going up a big hill.

Under normal conditions the EGT's would be 700c at 80mph in 5th gear constant which is about the same as stock.

When going WOT upto 120mph the EGT's never exceeded 730c

WRX-ellent - No worries! You have the PE1820 don't you? I wouldn't mind sitting in your car after the unichip is installed

Mike
mpj_becks is offline   Reply With Quote
Old 11-26-2001, 11:27 PM   #7
scotto
Scooby Specialist
Member Sales Rating: (0)
 
Member#: 3635
Join Date: Jan 2001
Location: Aliso Viejo,CA
Vehicle:
2002 WRX Swagon
Platinum Silver

Default

mpj,

Sounds very promising! What boost levels do you see at 80mph 5th cruise? Just wondering if the turbo gets a breather once in a while? Those were the same highest EGT's that Shiv mentioned as well last I read. People have said the power is pretty progressive, not all or nothing.. is this your experience?

Thanks again,
Scott
scotto is offline   Reply With Quote
Old 11-26-2001, 11:38 PM   #8
mpj_becks
Scooby Specialist
Member Sales Rating: (3)
 
Member#: 6265
Join Date: May 2001
Chapter/Region: BAIC
Location: Hayward, CA
Default

scotto - This may sound weird but when sitting at 80mph in 5th I'm not really seeing any boost to mainten that speed.

The power is progressive which makes for much better partial throttle driving in heavy traffic and so on.

This still doesn't get the way the car drives across but let me try and convey my thoughts a little better.

The car drives like if not better than stock, the partial throttle driving is everything my last setup wasn't. When you give it WOT the car responds, when driving around town the car drives like stock but more powerful.

I have yet to see any level of EGT to cause concern at any time, the boost levels have stayed at a constant 15psi with one or two 15.5 - 16psi spikes (my stock setup did this also)

Mike
mpj_becks is offline   Reply With Quote
Old 11-27-2001, 02:45 AM   #9
scotto
Scooby Specialist
Member Sales Rating: (0)
 
Member#: 3635
Join Date: Jan 2001
Location: Aliso Viejo,CA
Vehicle:
2002 WRX Swagon
Platinum Silver

Default

Mike,

Thanks for your additional reviews - you kindly have gotten to more the essense of my concerns. Actually I appreciate all the responses about the 'reallity' of other systems as well. So if your WRX came this way from the dealer you would of happilly paid about 2k more right?

I think the WRX needs a bit more pep to truly make it a fun car. But I have not wanted to compromise reliability or longevity much. I have been thinking about it this way - If you were to buy a used WRX what system would you consider a plus to have already on the car. (ie no worries about it having been on the car already as far as wear and tear, but a system you would gladly install yourself... if this makes sense.) I would mostly put an exhaust system in this category. Intake, etc.

Systems that I have heard spike quite a bit or run high EGT's or have driveability issues or spend the vast majority of the time at near full boost would compromise the car too much.

I would be interested to know how your car does on cruise control, and if you do any mountain driving how the EGT's look there as well. Oh, and a mileage report would be cool stock vs turbo XS vs Vishnu if you have info on that?

Thanks again,
Scott
scotto is offline   Reply With Quote
Old 11-27-2001, 09:45 AM   #10
mpj_becks
Scooby Specialist
Member Sales Rating: (3)
 
Member#: 6265
Join Date: May 2001
Chapter/Region: BAIC
Location: Hayward, CA
Default

Scott

I would have still haggled the price down

I will come back to you on the cruise control when I get back into town towards the end of the week, I have to confess to never using the cruise control anyway so I don't even know if it works

I have tested several extended hill climbs at real and unrealistic speeds/loads this is where I got my highest EGT of 840 at partial throttle.

As for mileage I have noticed little difference between the setups with all of them giving me around 250-290 depending on my driving.

Mike
mpj_becks is offline   Reply With Quote
Old 11-27-2001, 02:00 PM   #11
bedabi
Scooby Specialist
Member Sales Rating: (3)
 
Member#: 4825
Join Date: Mar 2001
Location: Buffalo
Vehicle:
2013 BRZ
CBS

Default

Thanks mpj_becks, that's exactly what I was wondering about since I live, work and drive here in NYC. Heavy traffic driveability was my biggest concern.
bedabi is offline   Reply With Quote
Old 12-07-2001, 01:00 AM   #12
scotto
Scooby Specialist
Member Sales Rating: (0)
 
Member#: 3635
Join Date: Jan 2001
Location: Aliso Viejo,CA
Vehicle:
2002 WRX Swagon
Platinum Silver

Default

Mike,

Any other updates since you last posted? Still lovin it? BTW do you have any plans to do track days? Would be really curious about EGT's during extended high loads if you go. Someone posted that their mostly stock car ramped up some high EGT's during a track day. Also a true mountain run would be also good to know.

As always - thanks!

Scott
scotto is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Turbo Xs Unichip With Vishnu performance EMI Adapter perrinphantom Engine/Power/Exhaust 1 08-09-2007 10:34 AM
vishnu emi/unichip problem. atomicapples Factory 2.0L Turbo Powertrain 2 10-27-2002 02:21 PM
Vishnu Tuned Unichip Potential 1quikrex Engine Management & Tuning 2 10-18-2002 11:38 PM
vishnu emi/unichip wiring. atomicapples Engine Management & Tuning 2 10-14-2002 01:09 AM
Review of Vishnu Performance Unichip and Tuning. GDA Factory 2.0L Turbo Powertrain 7 11-19-2001 10:33 PM


All times are GMT -4. The time now is 02:41 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.