I have had my Evo for a few months now and am starting to get serious about modifications. The Vishnu website does not appear to be current regarding currently available stage packages. I see some folks here with sigs that state their cars have stage 1, 1+, 1+++, 1.5, 2, etc. Is there any definitive information resource that includes component lists?

Thanks,
smitty

BTW, what is the difference between 'turbo-back' and 'dump-back'?

 

Stage 1: Cam gears, turbo back exhaust, XEDE

Stage 1+: Cam gears, HKS cams, turbo back exhaust, XEDE, Walbro 255l fuel pump

Stage 1++: cam gears, HKS cams, 10.5 hotside, turboback exhaust, XEDE, walbro 255l fuel pump (some add interoolers to this "stage" also)

Stage 2: ATP turbokit, cam gears, HKS cams, turbo back exhaust, XEDE, walbro 255l fuel pump


This is just a general list, some people add more to their stages. I would check out www.dyno4mance.com They have a good data base of Evo's and their mod list along with dyno charts.

Here: http://www.dyno4mance.com/tuning/you...mitsubishi.php

 

Thank you for the information. Dyno4mance has some impressive cars on their site. I think I have found the single point-of-sale entity that will suit all needs.

Can you provide any insight into the 'turbo-back' versus 'dump-back' exhaust difference? Again,

Thanks

 

A turbo Back is an exhaust system that starts at the Turbo charger housing itself, eliminating the stock O2 housing. This exhaust system can be a PITA to install. You may get an extra 5whp out of this setup. I would say, if you're not going to install a 10.5 hotside, or if you know you are going to go with a new turbo kit later, I would not get this exhaust setup.

A dump back exhaust starts at the stock O2 housing. Its much easier to install.

 

Alsow, FWIW, the Vishnu "Standard" turbo back exhaust is slightly quieter than the "Signature" series dump back, although personally I prefer the exhaust note of my signature series.

I think officially Vishnu really only has stage 0, 0+, 1, 2, 3. All of the other stage numbers are just people trying to represent where they are at with their level of mods. That's one the reasons why I simply say that I run a Stage >1

l8r)

 

(sub-zero, 0,1,2,3,) but we know, and go with the + system too.

 

Thanks, guys. I gather that Stage 1 is the logical starting point, but are any of the specific Stage 1 components obsolesced by the Stage 2 kit?

 

If you're going to go with stage 1, I would strongly suggest you think about doing cams at the same time (making it a 1+) and possibly head studs. This will save you labor $$$ ... the cams will net you a nice gain in power and the head studs are cheap insurance. I did it the hard way (still don't have the head studs), but if I'd have listened to the (same) advice given to me, I'd have saved ~$300-400.

Also, at one point in time I was told that the signature series exhaust would bolt up to the stage 2 and stage 3 kits, which is one of the reasons I got it. However, I think the standard exhaust now is also compatible with the bigger turbo kits. Someone from Vishnu will have to confirm this, though. AFAIK, everything else in the stage 1 kit is more or less a prerequisite for stage 2 and beyond.

Also, don't forget to get a Walbro 255 fuel pump. I don't think they are part of the stage 1 package ... but IMO they should be. Again this falls under the cheap insurance category.

l8r)

 

I'm with Ludikraut's advice. I've taken the valve cover off 3 times. 1 for ARP studs, 2 for pullies and 3 for cams. That is like 4-5 hours of work just taking off, cleaning and putting back on the valve cover.

 

I know this is hard to quantify but at what stage does reliability suffer. I realize in theory reliability shouldn't be an issue when done right. Also when does good road drivabilty suffer. I have done full stage mods before in a naturally aspirated motor and lost drivability. Does this make sense?

 

Driveability;

Your neck will hurt, you're wife or girlfriend will refuse to drive with you, neighborhood boys will sniff you out like dogs looking for a ***** in heat . Other drivers will give you dirty looks when they catch up to you at stoplights and prius drivers and tree huggers will regularly flip you the bird. You'll get home and ask yourself why you had to take the long way home, launching at every stoplight and stopsign, even though it made you late for dinner or getting some or both. Oh, and your friends with fast cars will make fun of you until they learn the hard way and they'll tell your other friends you cut them off and that's why they lost to you.

Your car will be louder with any effective exhaust and your clutch may be stiffer and may make noise depending upon what you select.

Your clutch will wear out faster as well your brakes (if you are taking advantage of your power).

The Walbro fuel pump whines - pleasantly I might add.

Driveline components can fail more quickly, motor mounts, differentials, drive shaft bushings, transfer case, transmission, especially if you are hard on them, and if you are bone headed, at least buy stock in your favorite rental car company.

Be prepared to sort out little items (vacuum lines and intercooler pipes pop off, gaskets leak, etc. )and anticipate breaking some big ticket stuff (in the mid to long run if you run with big hp), that way you won't be bummed out.

The Vishnu guys are good generally at telling you what to expect. If you ask them to do something out of the norm, then consider your self a test mule. For example, a stage one plus is a no brainer for them, the 10.5 hotside, launch control, methonal injection, bigger intercooler, headwork, for example, may need more time to get a strong buy reccomendation.

As a rule of thumb, if you stick with what was proven to work by them last race season, you'll do fine, this race season, should be fine, the stuff in the develpment stages for next season, well, it's anyone's guess, so if you try something for next season that doesn't work well, consider yourself warned .

That being said, stage one plus with a good clutch is great place to start if you don't want to worry too much. Even better, ask Shiv or David.

 

At what point is the bigger intercooler a need, not a want item. I am considering doing a turb upgrade and I just want to know what order I need to go with. I know that at the east coast dyno day earlier this month, the 2 stage 2 cars did not have upgraded intercoolers. When does the upgraded intercooler become beneficial

 

so the standard turbo back will give you more power than the sig. series dump back?