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Originally Posted by |V3nom|
will it be an unsafe lean zone? i dont plan on running it hard all the time, maybe a couple times a week at most. also, what my mpg gonna do, will it drop a good bit or go up some? seems like it would go down to compensate for the extra air coming through.
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we spoke a bit on my youtube account, but just to give you some relief, you don't NEED a tune with any of it. Our ECU is smart and adjusts fuel and timing for everything we do. If it sees a lean spot, it'll either add fuel or reduce boost....it's the beauty of having a wideband O2 sensor stock. The car is constantly monitoring AFR.
So no, you don't need a tune for those mods. Heck, the tune was the last power mod I did. Car ran fine and pulled strong. The tune just really unlocks everythings potential, as the stock tune on the car will only let you do so much, and it'll eventually start to lower boost more and more to bring power back down to where it wants it to be.
I did dyno's along the way, and right now untuned (i took the tune out to get service done and want to buy a second ECU to put the tune on to avoid downtime during mailing it to westers) , i'm putting down 245 whp and about 255 lb ft on a dyno dynamics. that's about 30-40 over stock.
With the tune, I put down 292 whp and 327 lb ft on a dynojet.
So don't worry. You can get the exhaust, cat, intercooler, etc....without the tune and not blow up the car.
As far as MPG, it's all mental. With extra power you want to play more, lol. But if you can manage to drive the same, mileage is about the same. I get on average 23-24 city and 30-34 highway. Don't forget you can still drive without getting into boost, that's what kills your mileage.