only mods i got is a turboback and k&n drop in. i have an appointment in 2 weeks and i have a choice of a flash or a custom tune on a dyno. should i just get a flash and save myself some $$ or do the custom tune on the dyno?? is the custom tune on dyno worth it for almost a stock car or just get the flash? gimme some advice pls. this is a 03 VIII

 

A custom tune on the evo can show pretty good #'s. A flash will get you to where you wanna be a/f and timing wise, but you can have it fine tuned, squeezing more power out of the car if you get a custom tune!!!

 

Unless you don't mind the possibility of having to tweak an off-the-shelf flash, I'd go with a custom tune if there is reputable tuner in your area. Unless an off-the-shelf flash is extremely conservative, there's no guarantee that it will not causing knock with your motor. I bought the Vishnu v380 mail-in flash which is supposed to be a conservative flash (supposed to be suitable for 91 Octane) , and with my car running on 92 Octane, the boost went beyond the intended boost levels which led to some pretty good knock events. If it weren't for EvoScan, I would have never known about the knock events. I had to tune down the boost to get knock under control.

 

If your not modding for a while then a custom is good.
But once you feel you need more power and decide to add more power mods then i'd get a base flash first and save for a custom flash once you get all your parts in.
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A tune on the dyno makes your car make good numbers on the dyno. A good tune on the road with a competent tuner makes your car as fast as it can possibly be on the road.