I emailed Vishnu about their Stage 0 Kit...
"The $2100 I quoted was for the full exhaust system which includes the downpipe as well as the cat back exhaust. I already have a 93 octane map for the full exhaust as well as the cat back system. The 40 wheel gain is on 91 Octane with the full exhaust system."

I've never heard (at least I think) of anyone talking about this downpipe from Vishnu...anybody have or seen them?

Thanks!

 

Yep, we've sold quite a few. Here's a new page we just put on-line on our website. Still more updates to follow.

http://www.vishnutuning.com/parts_evo.htm

Cheers,
shiv

 

Here's some info:
Vishnu Full Exhaust

Sound Clip:
Vishnu Full Exhaust Sound Clip

Dyno results w/ XEDE:


This is a great exhaust if you're looking for something sporty, but not too loud or raspy.

Mark

 

Shiv, I see 5-7 hp on your dyno for samco hoses. What is the peak hp gain? Noticable spool up time? Any evom discounts for your stages

 

Actually, ignore that claim for now. That tidbit was copied off the WRX section (where we do actually see hp gains from the samco upgrade). Not really to say if we see similiar gains with the EVO. Haven't really done enough controlled testing to make any conclusions. Needless to say, the page is still in its infancy with changes and updates made to it daily.

Cheers,
Shiv

 

With Stage Zero plus Vishnu DP and Cat I made 272.4 HP and 263.9 TQ on dynojet AWD using 93 octane.

 

That nice results and everything but if i do decide on a kit mine will not be dyno tuned unless shiv come down to the east coast so I have no idea how much weaker my kit would be and how off my curve would look?

Anyway, i'm still waiting on 1/4 mile time slips with the stage 0 or stage 0 with full exhaust combo

 

I just got back from CT last night where I dyno tuned 20 WRX and EVOs this past weekend at Pruven Performance. I was in DC @ Altered Atmosphere a couple weeks before that where I tuned a few EVOs. And I'll be Seattle next weekend again for dyno tuning at Matrix Engineering (both EVOs and WRXs). At this rate, I'll be back to the East Coast sometime within the next couple of months.

I no longer expect custom tuning to be worth big gains as we now have some pretty nice 93 octane maps that work close to optimally right from the start. At least this has been trend for the last few out-of-state EVOs we've done. While absolute numbers will depend on how strong the particular stock EVO is compared to other stockers, the nominal hp gains have all be consistent. We're seeing 20 wheel hp gains with XEDEs and 10 wheel hp gains with cat-backs for a total of +30 wheel hp with no significant change in boost pressure or lean AFRs. We're seeing Downpipes worth another 10 wheel hp, all other things equal. Currently working on new maps with boost control enabled. So far, we're been able to increase midrange torque substantially without sacrificing any safety margin against knock. The new boost control maps will be on the website when they are ready.

As for drag racing, our own shop car was tested by SCC a couple of weeks ago at Fontana (a pretty bad track) and ran a 13.0 at 108mph on 91 octane fuel. The ET was pretty poor due to a metallic Helix clutch which didn't fully disengage when the clutch was in. According to datalogs, shift time ranged from .7 to 1.0 seconds which is twice as long as a stock EVO which ran, IIRC, a 14.0 at 100mph (it was a hot day). Needless to say, the clutch is no longer in the car. I suspect it cost us a few tenths of a second. Still, it was enough to handily beat the other cars in the competition (Porsche 911 4S, E46 M3 and V8 S4) It also led the field around Streets of Willow which is what we were really aiming for.

Cheers,
shiv

 

When the maps are completed and online I'll load each one and do a few test dyno pulls at Altered just for kicks and post on here. That way people can compare the base maps on 93 octane to see what to realistically expect as far as gains.

Mark

 

Hey Mark, you mean showing us your dynoed hp compared to the untuned maps. That'll be great

 

I got to see this exhaust on the car and boy it's really nice and sounds bad ***. I got to see the downpipe off the car and the welds and flex section is just perfect. Very nice stuff. I was wondering if you need to shimmy the bars like you would on other systems out there??

Oh the good new Stage 0 Evo put down 258hp an 260tq. With just the exhaust (cat back) 240 and 240. Very flat TQ all across the board. I think a stock on on the dyno did 223hp and I don't know the TQ but 232 sounds right. So about 17hp gain from the cat back. So a good 35hp wheel gain with stage 0.

I did have the preasure to drive the car after tune and it was very smooth. I really can't comment on it to much because I only got to drive it for like 5 to 6 miles.

Thanks Joe!! for giving letting me drive you Wonderful car.

Eric

 

Sounds good. Just give a couple of days as I'm putting together the map database on the website right now. Check out at http://www.vishnutuning.com/xede_evo.htm

Most of the tech info at the top as been stolen from the WRX XEDE page but most of it still applies to EVO applications. The bottom part, however, is where the EVO XEDE map database will be. Should be up and running within a few days (just have to gather up, consolidate and review the maps from various out-of-state tuning trips. Then anyone can download them, view and/or download them into the XEDE with the XUpdate freeware.

Cheers,
Shiv

 

Does this mean that the Boost control portion is actually up and running? Also, is the installation now plug and play (no tapping into the wiring harness)

 

Boost control is working great on our car and will be tested for another two weeks or so before released to the public (current EXEDE customers will simply need to update firmware via XUpdate to get this feature). My last two dyno tuning trips to CT and DC have slowed the road testing process a bit. Our test car was sitting in long term parking at the airport for a couple of weeks

The XEDE is not plug-in and won't be for another few months. Too much new stuff being developed for it every day to settle down on a fixed harness. If cutting wires is a big problem, we suggest purchases the Field pass-thru harness from vendors such a Z1.

Cheers,
Shiv

 

Shiv....Please get ken or someone there to send me my serial cable for my xede....I have left my info with them several times....cheers!!!