For those of you with Ivan's TRE ... I could care less about the increase in top speed.
What I
am interested in, however, is Ivan's claim that the TRE nixes Suzuki's timing retardation in the lower gears, providing much more useable power and acceleration down low.
http://www.ivansperformanceproducts.com/tre.htm
Can anyone speak to this claim?
BS or true, in your experiences?
Also, does the TRE had an effect on the bike's ability to idle smoothly?
Thanks all...
Hi...I'm new here but have been around the OA circuts for quite a few years and became friends with Ivan when I saw how much heart and soul he poured into his Jet Kits for the CV carbs on FZ1's and ZRX's...I myself became somewhat of a well known tuner/installer and have had FZ1 owners from all over the state come to me for installation and tuning..but enough about that...as this is the first FI'ed bike I've personally owned but do trust in Ivan and called him immediately after purchasing my new-to-me '03 Busa last week and here's how Ivan explained it to me...
Yes..it de-restricts the 6th gear top-end but it also eliminates a factory oem neutering of the idle- approx. 1/2 open throttle positions in gears 1st-4th.
Now...as far as the retardation of 1-4 goes???...as I presume to understand why it is that suzuki would do this???...is the #1 reason most Jap imports come as such...to meet or beat EPA Regs...and in this case I'm assuming that the timing is retarded because the front end of the fuel map is probably waaaay lean (to meet epa regs) hence???...the timing must be retarded so as not to inflict too much heat build-up in the lower 1/2 of the throttle positions or gears 1-4....as ordering a TRE from Ivan was the first thing I did..but there's two types he sells.
The 1st is his "Original TRE" which just eliminates the offensive timimgretardation but should be used in conjunction with a Power Commander to address fuela mapping issues to correlate with the TRE's Ignition fix.
The other style of TRE Ivan have developed and sells is his newer "Smart TRE"....and as I understand the smart tre has a little pc board with it that enhances the fuel maooing as well and no PC is needed/required with the "Smart TRE" unit which of course costs a few bucks more.
Point being...the epa regs see the hayabusa "tuned for emmissions" where they give the beast very little AF mix to run on and hafta retard the timing to keep from overheating by retarding spark so it dosen't have TOO MUCH burn time on the small amount of AF mix that is injected..and still creates a "Lean Condition" to meet emmissions....and also suffers from the associated "RPM Surging" and "Choppy ON/OFF Throttle Response"...Ivans "Smart TRE" is supposed to cure that without necessitating purchase and use of a Power Commander.
We'll see...my new "Smart TRE" is supposed to be here in a few days...I'll even do a before and after dyno/ega but so far???...in almost 4 years of being somewhat associated with Ivan???...as a tuner and installer of his jet kits???...his performance claims and products have never failed me yet.
L8R, Bill.
