Some interesting tuning and dyno results!!
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From: north bay, CA
Some interesting tuning and dyno results!!
I decided a couple of months ago to upgrade to a vf22 and sti inj. and fuel pump. To go along with my turboxs stealthback mated to a prodrive axle back muffler and Vishnu uppipe and intercooler hoses(stock intercooler). I got the turbo and fuel mods installed a Lic motorsports in Novato and because Bill from I -speed was gonna be in town at the same time as the install I decided to go with his Ecutek road tune. (I previously had Vishnu's stage one reflash that i was happy with). After two tuning sessions of a total of 3 hours in a 3 weeks period of time from Bill, I was tuned. After the first tuning session of 2+ hours the boost was not high enough and power seemed a little low from what I was told to expect, so we adressed that issue and some fine tuning the second session. I was boosting around 17psi depending on the outside temps after the second session. I was curious to see what kind of numbers i was putting down so I went to Vishnu to dyno my car and as you can see by the dyno graphs I wasn't too happy with the results. I always thought the power was a little low but not that low. So I decided after I saw the low results to have Shiv at Vishnu retune my car with Ecutek and you can see the results, a big difference. The only change in mods was a larger tmic (which i dont think added 35whp). The a/f ratio also seemd to be a little safer. The 240whp I put down on Vishnu's dyno was a little low for what vf22 powered cars ussualy put down, Shiv said it was because of my exhaust, 2.5inch and a restrictive Prodrive muffler. I dont have the results to post at the moment but I purchased the turboxs catback adapter pipe and an Espelir 3inch catback (3inch all the way now). I then went back To Vishnu to get tuned again and I ended up with a gain of 10 whp (250whp total) and 15 torque (228 torque total) b/c of the freer flowing exhaust.
I have posted the dyno and air fuel ratio graphs for the defferent tuners tunes and will post the dyno graphs of the exhaust change in a couple of days when i get them downloaded.
By the way the cars pulls really cars now!!!! I had no idea what this car could do.
I have posted the dyno and air fuel ratio graphs for the defferent tuners tunes and will post the dyno graphs of the exhaust change in a couple of days when i get them downloaded.
By the way the cars pulls really cars now!!!! I had no idea what this car could do.
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Originally Posted by Donkey
There is a pretty good chance the changing of the stock TMIC had a lot to do with it.Using a bigger IC will allow for a more aggressive tune.
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Originally Posted by Skatemur
sweet set up, i am intrested in doing the same style of mods as you, would you say it would be a reliable daily driver with that set up? thanks
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Did you ever get the car on the dyno with Bill? If not, do you have a wideband O2 sensor on the car? If Bill's tune was a pure road tune w/o a wideband at all, this makes a lot more sense. I deffinately agree that Bill's tune is running pretty lean, which makes me wonder if he had a wideband at his disposal.
BTW, A bigger TMIC will deffinately make a significant difference at your power level btw. I wouldn't be surprised to see a 15-20whp difference.
-- Ed
BTW, A bigger TMIC will deffinately make a significant difference at your power level btw. I wouldn't be surprised to see a 15-20whp difference.
-- Ed
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Just thought of something else... how was the weather when you got tuned by Bill versus Shiv's tune? It sounds like Bill's tune was done several months ago, and Shiv's tune was recent. Then you have to consider that Shiv was tuning in the winter with nice cold air. If this is the case, I'd be very careful with that tune when the spring/summer hit. On the first warm day, make sure to listen very carefully whenever you push the car... chances are, you'll hear some detonation and will eventually lose a good deal of that power. Winter tunes tend to do that.
-- Ed
-- Ed
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From: north bay, CA
Originally Posted by vaus
Just thought of something else... how was the weather when you got tuned by Bill versus Shiv's tune? It sounds like Bill's tune was done several months ago, and Shiv's tune was recent. Then you have to consider that Shiv was tuning in the winter with nice cold air. If this is the case, I'd be very careful with that tune when the spring/summer hit. On the first warm day, make sure to listen very carefully whenever you push the car... chances are, you'll hear some detonation and will eventually lose a good deal of that power. Winter tunes tend to do that.
-- Ed
-- Ed
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Originally Posted by wssboard18
Every tune that Bill performed on my car was done from 7pm or later at night. The last tune he performed was in south SF between 7-8pm. I believe that the outside temps at that time were jsut about the same as the temps in shivs dyno room. As for adding an intercooler or not, my dyno with Bill's tune was still only 206whp. Thats 4whp less than what I had before I installed my vf22, inj. and pump, and Bills tune. That right there is enough to question the tune. I could undersatand if the dyno run was atleast 225whp or so, but not 206whp and a loss of hp.
That's cool... I was just questioning possible variables. You still don't mention if Bill had access to a true wide band O2 sensor while tuning your car?
-- Ed
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Originally Posted by Imprezer
Weather does not make THAT much difference.
-- Ed