Quote:
Originally Posted by WiggyB
Had a talk with my tuner and they aren't too high on the reflex kit. They did one for a customer a while back and said they were hard to tune to get them to ramp up easily its like a straight hit once in boost. I have been reading everyone's posts you all have mentioned that you have to play with the curve to get it to ease in but what are your thoughts?
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You may be talking about RADZ methodology where he was learning a new tuning method.
For me it was really pretty straightforward.
All I can say, is if *I* could figure this out by myself, with only a little basic info from folks on this board, a true tuner should have no issues with it.
The ramp-in is a product of the MAF curve in both the Reflex and the ECU. The spreadsheet supplied by THPSI takes all the guesswork out really. It couldnt be more simple. Ok it COULD be more simple, but it wasnt hard thats for sure.
Theres about 1000-2000hz wide "blend range" built unto the spreadsheet were the DI tapers in less, and the reflex tapers in more. In my experience the "blend-over" happens in an area were you dont hang around much anyway. The blend-over happens on mine from about 8khz to 9.5khz and most part throttle is below 5-6khz with procharger, and WOT is 10khz and up. I suppose with road-style racing it might hang around in the blend area more where you are holding lower gears and feathering throttle, but even then its really not a problem because of the MAF math. The physical cross section where the MAF sits will affect the blend start point, with the 4" (i think) cross section of the PC intake tube being smaller than whats typical with a PD-style SC. I think on a PD the cutover starts around 6khz.
Maybe the DSX will be better/easier IDK, but the Reflex THPSI is not a hard cut into PI.