Just want to post my experiences with Shiv this last Saturday at the Chicago dyno day. I was a mail in Dynoflash customer and was pondering to get a custom tune with Al or go with the Xflash challenge. Well I decided to get the xflash challenge since Shiv was in town and see what he can do plus I can get a dyno out of it .
Well when I first met Shiv that day, he appear so young to be that knowlegeable about tuning. He is very friendly and down to earth for someone who is pretty famous around the automobile/tuning industry. I admitted that I was a Dynoflash fan and it will take some major improvement to convince me to join the Vishnu camp, since Al flash made quite an improvement with my car (chasing down a E46 M3 at road america in full throttle ). with just some basic mods, intake, turbo back, and boost control.
So prior to the dyno on saturday I added a fuel pump, 264 camshaft, cam gear and ams lmic pipe. My baseline run on a Dynojet reveal number as follow: 253 whp and 267 torque with 21psi (since the new porsche C4 make 259 whp) with the a/f ratio running pretty rich around 10 and lower at high rpm. Well after numerous pull and Shiv custome tune xflash it able to produce the following: 292 whp and 293 torque at 22 psi with the a/f leaner around 11.5 and 12. Shiv thought I could have made 295 whp easily but it was getting very hot and we were on a time restraint. Now that some major improvement with just an Xflash custome tune .
Well, I am sure if Al custome tune my car I would have gain some power also, but I just want express my opinion that Shiv is very bright young man and he does know his product and he does care that his cutomer is getting satisfaction with his product.
Thanks Shiv you made a believer out of me.

 

Those are nice numbers, just put some race fuel in the next time you race just to be safe. 22Psi and 11.5 A/f can produce zero knock for drag racing, dyno pulls and driving around town, but if you get a bad batch of fuel watch out. And the heat you'll produce during a race is also something to watch out. I'm not a Vishnu or Dynoflash camp member, I just blew my motor with similar boost and a richer a/f.

 

yeah, thanks for the comment. I wil lower the boost around town and save the higher boost for the track with race gas.

 

Aren't most 'cammed' Evos running around 330 or 340 hp? And this was on the ever-optimistic DynoJet dyno? Before you flame me, I don't have anything from Shiv or Al on my car. How much is a custom Xflash? I'm around 300 whp with the emanage and no cams. I'm just curious as the numbers seem a little low to me for a car with 264's in it.

 

What you say may carry some truth if he was running a stand-alone ecu with fixed tming/fuel maps. Your comments do not apply to a stock ECU application which has more than enough adaptability to handle just about anything you can throw at it. Dual maps, floating ignition and fuel trims, adapting knock sensing, etc,. Additionally, without knowing timing advance values, concluding that any specific AFR (within reason of course) is unsafe or safe is impossible.

Needless to say, we're still running an XFlash/XEDE combo on our race car because of the flexibility and safety margin that it affords. I'm reasonably confident that a stand-alone set-up wouldn't have been able to handle the wide range of altitudes, temps and driving conditions that we subjected the car to during One Lap of America with *serious* re-tuning between events.

gashero-- Thanks for the kind words. I appreciate it. Let me know if you need more help with your car

Shiv

 

The real Dustin here.....

Glad to see you are enjoying your car. If you need anything, just let us know.

 

FWIW, this dynojet seemed to read lower than the one we used in Dallas. Even without cams, I put 301whp there. You have to realize that any given dyno is for tuning purposes and not to make a big peak number. Gashero's car that put down 295whp on this dyno would smoke my car. In the same token, obviously the Dynoflash mail map would've put down more than 253whp on a different dyno.

Gashero, I'm glad you are happy. Welcome to the world of Vishnu and enjoy your car!

 

Shiva H. Vishnu!

 

What you say may carry some truth if he was running a stand-alone ecu with fixed tming/fuel maps. Your comments do not apply to a stock ECU application which has more than enough adaptability to handle just about anything you can throw at it. Dual maps, floating ignition and fuel trims, adapting knock sensing, etc,. Additionally, without knowing timing advance values, concluding that any specific AFR (within reason of course) is unsafe or safe is impossible.

Needless to say, we're still running an XFlash/XEDE combo on our race car because of the flexibility and safety margin that it affords. I'm reasonably confident that a stand-alone set-up wouldn't have been able to handle the wide range of altitudes, temps and driving conditions that we subjected the car to during One Lap of America with *serious* re-tuning between events.

gashero-- Thanks for the kind words. I appreciate it. Let me know if you need more help with your car

Shiv
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So Shiv, it is ok to leave my boost at 22 psi on my xflash ecu? not that I will push it to the limit all the time, only to the grocery store and back hehehe .

______________

 

ummm....i agree with this guy totally...my car makes more hp..is it the dyno maybe....that looks extremely low

 

It's part of it:

Vishnu stage 1 got me 311whp on TTrix's dynojet. added 264/272 and netted 312whp on Alteredatmospheres dynojet.

 

moved to the vishnu forum.

 

So looking at number gain alone, you picked up 39 hp and 28 lb ft from 264's, cam gears, and a custom flash. Those aren't bad numbers, but I don't see the clear advantage over a Dynoflash (or any other method for that matter). The area under the curve would tell a lot there, do you have a dyno chart? But hey, as long as you're happy and Shiv is taking care of you it doesn't matter what I think.

 

Yeah.

I think about the only way to get a somewhat reasonably accurate comparison of the power output of cars is by comparing trap speeds!

 

FWIW the dyno at the Porsche exchange was reading low, since they were using an SAE correction factor of 1.03. So basically the numbers we were getting are for all practical purposes uncorrected numbers.

I was really bummed out at first, since I put down SAE 316whp with a regular stage 1 in Colorado. Since then I've added HKS 272s, and then there's the lower altitude and 93 Octane to consider, so I was pretty excited. Well, my first dyno pull at the Porsche Exchange was something like 285whp and I was like WTF?!?! It wasn't until I looked back at all my dyno charts on DynoJet's viewer software that I realized that the CO dyno was using a correction factor of 1.25. When I compared the uncorrected numbers from both dynos I was actually up by almost 40whp.

NEways, regardless of my dyno runs and using smoke and mirrors to make my numbers look good, I know my car is quite a bit faster now than it was before and that's all that matters. However it was a good lesson in how much readings will vary from one dyno to the next.

l8r)