I think you need to read the article in full to understand it, not just small bits as yfin has posted, have a read or if I may… ill just summaries it.
“If you don’t want to make your car go fast, leave it stock what fool wouldn’t want Vtec ! People complaining about Vtec should be shoot, I would love more Vtec noise in my Euro, but i cant afford it.”:wave::wave:
Extreme WARNING for JTune Extreme Euro Owners
26/1/2008
To Whom It May Concern:
Common feed back from a small number of JTune Extreme Euro owners are reporting an extremely disturbing sound which is experienced from approximately 3500rpm onwards until redline when accelerating hard.
This noise has been described by clients as the following:
- • Metallic reverberation throughout the car above 3500 rpm
- • Unbearable difference above 3500 rpm
- • My passenger complains and needs to commonly repeat words when I accelerate hard over 3500 rpm
- • The exhaust and intake growls at me like its angry above 3500 rpm
- • Annoying Harmonics echo above 3500 rpm
An example of the described noise can be
downloaded here. The questionable noise starts to occur 1.3 seconds after the beginning of the example.
JTune Official Response regarding owners concerns.
After conducting research into owner’s reports we have found the exact cause of the reported noise. The described noise by owners occurs exactly at 3638rpm when throttle position is above 20% and or 5600rpm when throttle is below 20%.
The exact cause of this noise is commonly known to the Honda Performance community as "VTEC". VTEC is a perfectly normal noise, a noise which the typical Honda Performance community pays good money to experience.
VTEC engaging is when the engine changes cam profile allowing more air into the engine by increasing the distance and time which both the exhaust and intake valves are open for. VTEC on the standard Honda Accord Euro is activated at 6000rpm, from our research the majority of Honda Accord Euro owners hardly rev their car above 6000 rpm therefore never experience VTEC.
Our JTune Extreme Euro kit has been designed from day one to produce maximum possible power throughout the entire rev range. One way we achieve this is through our radical header design which allows us to lower the VTEC point considerably from the standard position. The lowered VTEC point allows us to gain massive midrange performance all the way to redline which deliveries what we consider a delightful VTEC noise.
Clients who are concerned about experiencing VTEC and are planning to purchase the JTune Extreme kit we recommended to keep driving throttle position to a minimum. For those customers who do not wish to experience the VTEC experience altogether we can disable VTEC although performance gains will be greatly reduced by more than 65%.
