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Part II: Evo X Tuned

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Old Feb 8, 2008 | 12:11 AM
  #91  
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Shiv,

Was the wideband off on the dyno or does the Evo X actually tolerate 11.5-12:1 AFR on 91 octane?
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Old Feb 8, 2008 | 09:41 AM
  #92  
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SHIV,

Does the PROCEED modify MIVEC variables?

I am interested in seeing the gains from mivec adjustments on both cams. Something as simple as adding the JDM MIVEC map to my 9 made a night and day difference.

Also, dyno numbers are great and all but you should run that puppy down the strip and see what you get.
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Old Feb 8, 2008 | 09:49 AM
  #93  
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Originally Posted by razorlab
Shiv,

Was the wideband off on the dyno or does the Evo X actually tolerate 11.5-12:1 AFR on 91 octane?
I know where you are going with this. Excellent question!

The tune does seem a little unsafe IMO.
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Old Feb 8, 2008 | 10:09 AM
  #94  
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Originally Posted by BOOSTEZ
I know where you are going with this. Excellent question!

The tune does seem a little unsafe IMO.
So you think the tune seems unsafe on a car that you have never data logged or tuned before?? Or have you tuned an Evo X? What do you consider a safe tune? What do you consider a good tuned? How many different vehicles have you tuned.? Have you tuned NA, Forcedfed FI and DI engines? These are all questions that have absolutely nothing to do with this thread but I do feel they are excellent questions?

Its easy to see why these threads continue to go off course. Any number of Items could have affected the a/f ratio reading. The car could very well run that lean without a problem. Let Shiv answer the question before assuming it may be unsafe!!!
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Old Feb 8, 2008 | 10:17 AM
  #95  
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Originally Posted by STi2EvoX
That 13 whp gain, boostez, is with a cat back. Everyone knows that the majority of the power made in an exhaust system is in the downpipe. Period, end of story. I still can't figure out why every company is making cat backs and not turbo backs for the car. The stock down pipe is 2 1/4 inches for christ's sake. Having a 3 in catback will help, but it's like having a coffee stirrer leading into a mcdonalds straw. Having that small diameter piping in the downpipe is choking the turbo, expecially with the hotside of this turbo being bigger than the 9. The flow capacity should be incredible with a 3 in downpipe. Open it up at the source! That's where the power is. Shiv is right; 350 whp on a dyno dynamics/mustang (400 whp on a dynojet) is just around the corner with the downpipe installed and a bit of ecu tweaking. Matter of fact, I think that's why the boost tapers so much by redlne. It's not like the sti's turbo running out of breath, it's being choked by the stock downpipe, and of course is undertuned from the factory probably for emissions purposes. Don't forget people that the new evo manages a 3 star environmental rating, the highest possible in Japan. Shiv, what do you think? Am I on to something with this or what?
The turbo isnt being choked by the downpipe, this turbo flows 5-6 psi LESS than the IX turbo.. The factory downpipe on the X is very well designed unlike the VIII/IX one that is flat at certain spots, so changing the downpipe on the X isnt gona give very much gains, Eric and other tuners have already stated this
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Old Feb 8, 2008 | 10:36 AM
  #96  
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Originally Posted by NoTec
So you think the tune seems unsafe on a car that you have never data logged or tuned before?? Or have you tuned an Evo X? What do you consider a safe tune? What do you consider a good tuned? How many different vehicles have you tuned.? Have you tuned NA, Forcedfed FI and DI engines? These are all questions that have absolutely nothing to do with this thread but I do feel they are excellent questions?

Its easy to see why these threads continue to go off course. Any number of Items could have affected the a/f ratio reading. The car could very well run that lean without a problem. Let Shiv answer the question before assuming it may be unsafe!!!
I don't have to be a tuner to know what the average 91 pump gas on MOST turbo cars range with a tune. How many turbo cars have YOU owned? How many AFRs from each of those cars have YOU compared?

I'm not saying it can NOT handle those AFRs without some knock. Hell, even Shiv said the car continues to make power when it knocks.. obviously, he HAS to know it's knocking. AGP also said the same thing and had to replace the FMIC to keep the knock down. Going leaner only creates more heat and advanced timing.. to comment that it seems unsafe isn't far fetched..
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Old Feb 8, 2008 | 10:44 AM
  #97  
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From: CT
Originally Posted by BOOSTEZ
I don't have to be a tuner to know what the average 91 pump gas on MOST turbo cars range with a tune. How many turbo cars have YOU owned? How many AFRs from each of those cars have YOU compared?

I'm not saying it can NOT handle those AFRs without some knock. Hell, even Shiv said the car continues to make power when it knocks.. obviously, he HAS to know it's knocking. AGP also said the same thing and had to replace the FMIC to keep the knock down. Going leaner only creates more heat and advanced timing.. to comment that it seems unsafe isn't far fetched..

LMAO!!! You are incapable of understanding.
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Old Feb 8, 2008 | 10:46 AM
  #98  
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Originally Posted by NoTec
LMAO!!! You are incapable of understanding.
+1
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Old Feb 8, 2008 | 11:07 AM
  #99  
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anything new to report shiv?
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Old Feb 8, 2008 | 11:33 AM
  #100  
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Originally Posted by Jeff_Jeske
SHIV,

Does the PROCEED modify MIVEC variables?

I am interested in seeing the gains from mivec adjustments on both cams. Something as simple as adding the JDM MIVEC map to my 9 made a night and day difference.

Also, dyno numbers are great and all but you should run that puppy down the strip and see what you get.
Help.
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Old Feb 8, 2008 | 12:54 PM
  #101  
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Oops, I meant test pipe
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Old Feb 8, 2008 | 01:29 PM
  #102  
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Originally Posted by Asta4125
OMG....OMG are you kidding me. Why is every thread I enter. You make retarted comments. Every single thread. This completly off topic. So you think Shiv's tune is on the unsafe side? How can you say that when you havent seen one log of data from the car. Man you need to be banned. Nothing but consistant arguments from you. Instead of saying that you think the tune is on the unsafe side, why not put it into a quesion. But you dont. Do you realize how many people you **** off with your posts. How many threads are turned into this everytime you post. I THINK I SPEAK FOR THE MAJORITY ON HERE ENGOUGH!!!!!!!!!!!!!!!!!!!
NM

l8r)

Last edited by Ludikraut; Feb 8, 2008 at 04:21 PM.
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Old Feb 8, 2008 | 03:00 PM
  #103  
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Originally Posted by BOOSTEZ
I know where you are going with this. Excellent question!

The tune does seem a little unsafe IMO.
Actually that is not where I am going with this. I am actually curious. It's a totally different/new motor so it might be capable of this, that is why I am asking, I am not asking it to stir the pot.
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Old Feb 8, 2008 | 04:15 PM
  #104  
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Originally Posted by razorlab
Actually that is not where I am going with this. I am actually curious. It's a totally different/new motor so it might be capable of this, that is why I am asking, I am not asking it to stir the pot.

+1

would like some answers and would like my X tuned soon

nebo
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Old Feb 8, 2008 | 05:07 PM
  #105  
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The X can comfortably run leaner than the IX which would comfortably run leaner than the VIII. Just the evolution of the cylinder head. Mivec helped during the VIII to IX transition. And Dual Mivec helped again with the IX to X transition. Just about any modern turbo engine (with a good cylinder head design) does not need to be overfueled at 10-11:1 for cylinder cooling. Those days are long gone thanks to emissions and fuel economy driven improvements.

And it's not going to stop here. Within a few years, I'm sure we'll see a direct injection version of the 4B in the Evo. And it will run near stoich under boost right from the factory just like the BMW 335. Times are changing and we are no longer tuning an old out-of-date engine that just happens to be able to support big power numbers when boosted heavily.

Shiv

Last edited by shiv@vishnu; Feb 8, 2008 at 05:57 PM.
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