I have a question for everyone regarding the Trifecta tune.
I only want to pay for one tune, but from what I hear if you do the downpipe upgrade you have to get it retuned. Well they charge the same amount for just an update.
My question is since I'm getting the tune first and will wait a bit for the downpipe. If I tell trifecta that I already have the downpipe when I get the tune, and they give me a tune as if I have the downpipe on it, but I don't...will that create a crappy tune for my car without the downpipe?
To answer your question, takes a small description of AFR. AFR is the Air Fuel Ratio. Without going into great detail, you will want to make sure you car is not running lean [too much air] or running too rich[too much fuel]
The downpipe is the biggest factor and performance restriction in tuning our cars with the stock turbo. If properly tuned, a car with a high flow catalytic converter or no cat in the downpipe, can get 20-30 more wheel HP. On 93 Octane, on a stock Kappa, the car will be able to be tuned to roughly 280-290 rear wheel hp. Add the high flow cat or no cat downpipe and most tuners can get you to 300+ wheel hp
So the problem you might run into, until you get the new downpipe, is that the car will run Rich as it is expecting more air, compensating with more fuel, but does not have the extra air.
So you might have bad starts, which will require you to wait for the car to warm up more before driving, and you will see black unburnt fuel [which will be powder like] around your tail pipe ends.
Personally, I would just wait.