kenntona;1023139 said:The key issue on these piggybacks is NOT the hardwares, but the tuning process based on what you have on your car. The distributor and/or tuner should have the best feedbacks in terms of what cars they have installed on, what are the dyno figures........
kenntona;1023141 said:So the parameters like AFR for a car with headers/downpipes/CAI is running on the same numbers as one without any mods? Cannot be, right?
wt_know said:since you mentioned about headers/downpipes/CAI
if these items were replaced with aftermarket components, wouldn't the stock ECU would have AFR issues?
if this is true, these components should not be upgraded if the ECU is not "upgraded" to meet the changes
local workshop will advise just by putting these mods, there is be bhp/nm gain.
but why? since stock ECU work the same way although these components were upgraded (especially for headers and downpipes)
kenntona;1023147 said:The gains on these hardwares are very minimal, given that the parameters in the ECU is untouched. For instance, installing headers/downpipes on a stock car can help exhaust flows (breathe the engine), but not a 20+ % bhp gains like playing around with air-fuel ratios.
M-Noobie;1023149 said:The stock ECU's and pre-tuned piggyback map adapts to mods but the gain will not be much, probably several to tens of hp. To maximize the gain, you will need a reputable workshop to tune for you.
wt_know said:i guess the tuner for pre-tuned piggyback will think even their MAP is pre-tuned, the changes of headers/downpipes/CAI would not have a significant impact on their tune as these hardware gain is very minimal.
hence, the pre-tuned air-fuel-ratio is within the "safety" juice-up level based on stock engine which they have tested in their lab or backyard
wt_know;1023152 said:if the pre-tuned piggyback really deliver the +50bhp & +70Nm as what they published in their chart for x28i (20% up from stock)
that's a HUGE gains on stock ECU liao ... more than enough to forget the headers/downpipes/CAI gains
kenntona;1023159 said:Not the case for turbo cars......
Speed Haus;1024821 said:Guys,
Speed Haus is the authorized seller of Racechip TB. We have already installed on several car makes and the dyno performance figures are outstanding, even when compared to other tune boxes. And they are available for all turbo cars from E to F Series!! Please see our thread which we have recently started and feel free to contact us for any queries on the RC TB. Cheers!!
wt_know;1024823 said:please pm price for f10 520i n20 (include dyno?)
what is the increased in bhp/nm
is there a need to improved the intercooler? as one of the bro mentioned, even though piggyback can deliver the increased bhp/nm, it is quickly negated by hot engine (overheat?)
ac323;1024828 said:especially you drive 6k rpm most of the time..................................
cheeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeers
wt_know;1024829 said:5.5k rpm only .... so i am safe