Orginally posted on our vendor forum. Now moved to engine/turbo/drivetrain. Links to pictures on Page 3

Hi guys,

We just received our first production turbo upgrade package from our fabricator. It looks really nice. Here's some press material I'm writing for it. I also have some pics which I'll post up tomorrow or the day after. We'd like to get some feedback before posting the pics and product data on the engine/turbo forum.

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Vishnu Performance Systems is proud to present our series of Turbo Upgrades for the Lancer Evolution. In designing this system, we set forth the following design criteria:

1) Ease of Installation: By retaining the factory exhaust manifold, installation time is greatly reduced. The turbocharger, up-pipe and down-pipe can all be installed from underneath the car with no chance of head stud snapping, cylinder head damage, radiator damage, etc,.

2) Flexibility: The user has a choice between a standard bearing 50-trim T3/T04, a GT3037, or high output GT35R turbochargers to ensure optimal system matching for their particular application. All options can be upgraded to the direct-replacement Stage 3 tubular exhaust manifold option at any time.

3) Durability: By mounting the turbocharger low and directly to the engine block, the manifold and up-pipe are relieved of much of the load bearing and vibrational stress commonly associated with aftermarket turbocharger systems.

4) Exhaust pulse separation: By keeping the exhaust flow from cylinders 1&4 and 2&3 completely separated in the exhaust manifold and up-pipe, destructive pulse cancellation is avoided, thus improving turbo performance and spool-up.

5) External wastegate: By avoiding the use of an inherently compromised integrated wastegate design, boost control aberrations such as boost creep and boost spiking are avoided. Another advantage of an external wastegate is that exhaust turbine efficiency is maximized. Also, by rejoining the wastegate discharge far away downstream of the turbine outlet, power-robbing exhaust backpressure and turbulence is minimized.

6) Water cooled bearing: This simple feature ensures maximum turbocharger life and resistance to coking by keeping bearing temperature constant even during extreme use. Every OE manufacturer of turbo cars rely on water cooling. The aftermarket should be no exception.

7) Optional ball bearing: For maximum performance and reliability, the use of a GT-series turbo is recommended. These ultra-modern turbochargers will outperform traditional T-series turbochargers due to their more efficiency bearing design and modern compressor and turbine wheel aero characteristics.
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That's about it so far. Let me know what you guys think. Questions, comments, etc,. Fire away.

Wait until you see the pictures

Cheers,
shiv

 

Awesome Shiv so the choices are a 50 trim, 3037( vishnu specd?) or a gt35. The 50 would seemingly be pretty darn cheap compared to the others but additional performance and reliability could be gained from them? Also these are "dual pulse" inputs instead of "dual scroll " design right? So the manifold is all we will need to replace (and injectors)

 

Please forgive my stupidity, but when you say "up-pipe", I'm thinking WRX. What are you referring to when you use that term?

 

The 50 trim T3/T4 is the same turbo we've been running for the last couple of years in the Stg 3 WRX kit. It's also the same turbo we've run in a few high hp 10 and 11 second turbo Miatas. It's a good all-around turbo for the price. There are a few exhaust A/R options depending on how much power the user wants.

The next step up is the 3037 option which is also available in 2 turbine housing A/Rs. The standard one that we used in our shop car which made 440 to the wheels on our AWD DD dyno. That's somewhere around 550whp on a 2wd Dynojet, FWIW. Or the bigger A/R which may be best suited for stroker motors and will make a bit more power due to the less restrictive exhaust side.

The big GT35R is best left for serious built-motor applications where no less than 600-700bhp will do. Obviously, this will only appeal to a small group of people. Boost response is around 300rpm slower than the standard 3037 which is surprisingly good considering the power potential of this big guy. This turbo will easily propel a full weight EVO into the 10s if that is your gig.

While none of these turbos themselves have twin scroll exhaust housings, the exhaust manifold plumbing feeding them is twin scroll.

Cheers,
Shiv

 

The up-pipe is the pipe between the exhaust manifold and the turbocharger. In the case of the EVO, it's a short twin scroll piece. Out of it comes the piping for the external wastegate. I think you'll see what I mean when i post pictures. It's pretty darn cool, if I do say so myself

-shiv

 

Shiv,

for the 50-trim what supporting hardware is required, or will that be part of the kit (i.e. injectors etc.)

Also, will an HKS d/p mate up to it?

 

less yappin and more snappin!!!
pix that is

tom

 

For those who want to piece together their own system, we plan on selling the turbo kit by itself. That is, just the turbo, up-pipe, downpipe, Tial wastegate, lines, intake, etc,.

For those who want a complete solution, includding injectors, reflash and/or XEDE, etc., the Stage 2 engine package is what they will want. This includes everything that one will need to make full use of the big turbos.

Cheers,
shiv

PS. Tom, the pics will come tommorrow. You'll like 'em

 

Well, this begs the question...if you are spinning 11.60's now...can we expect sub-11 with the stage 2?

 

With the GT35R, I certainly believe so. The 3037 is a bit flow lmited up top. With proper gearing, on a full weight EVO, traps speeds will probably max out in the high 120s which makes it a low 11 second car. The GT35R should make another 75-100whp which would make it a 10s car without a doubt.

Shiv

 

At what rpm just 3037 turbo spool up??? You say that the gt35r spools 300 rpm slower than th 3037. Man so many choices with turbo kits it getting harder to deceide!!!

 

On a stock engine (with cams, gears), running a 3" exhause with no cats, the GT3037 will make 30psi by 4000rpm.

shiv

 

yeah i'm still cleaning up my boxers from that run!!! :0

 

Nice!!! Do you think I will be able to reach 450whp-500whp with a stock block with the 3037 turbo with cams,gears, 3in turbo back, intercooler upgrade, fuel pump, 720cc injectors, standalone and of course 100+ octane gas???

 

Will you still be able to use the XEDE for this upgrade or will a stand alone system need to be used? What about the X-Flash?