What's the difference btw I-Vtec and Vtec?
Plz explain me...and what's better?

I have an Acura RSX(auto) and trying to turbo charge it, but do i need to put blow off valve? since it's auto but has the manual shift too...so i dunno what to do...
plz tell me...thanks

 

There's several discussion on this that you could find with a search. Also, it's
been covered on k-series.com, vtec.net, etc.

In short, the main difference is that Variable Cam Timing (VTC, the "i" in i-vtec)
has been added to "normal" VTEC. Someone will assuredly correct me if I'm
wrong on that.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by brianyjkim &raquo;</TD></TR><TR><TD CLASS="quote">

I have an Acura RSX(auto) and trying to turbo charge it, but do i need to put blow off valve?</TD></TR></TABLE>

omg. are you serious about this q.?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by brianyjkim &raquo;</TD></TR><TR><TD CLASS="quote">I have an Acura RSX(auto) and trying to turbo charge it</TD></TR></TABLE>

There is no way that auto trans is going to handle the increased power.

 

as the resident "expert" on turboing an automatic....

let me just say if you upgrade the pistons and rods, im sure the car can handle a turbo. the tranny might not last too long

but it is possible

 

andy is right. its kind of like there are two "stages". there are 3 different cam profiles. the fist "engagement" starts at i think 2200 and the second at 5700(?), something like that. and they call that VTC. corret me if im wrong..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sslude &raquo;</TD></TR><TR><TD CLASS="quote">andy is right. its kind of like there are two "stages". there are 3 different cam profiles. the fist "engagement" starts at i think 2200 and the second at 5700(?), something like that. and they call that VTC. corret me if im wrong..</TD></TR></TABLE>

VTC is Variable Timing Control. Basically the sprocket for the intake cam is a hydraulic device, that when fed with variable oil pressure can retard or advance the cam over a 50 degree range. This system is common to the entire line of K series engines.

The following info is for all K Series engines in the Base and Premium RSX, CRV Element, Accord 4 cylinder and 2002+ Civic Si:

These engines run a system similar to VTEC-E. The engine runs on 12 valves until 2200 RPM. After 2200 RPM the VTEC system engages the additional 4 intake valves to increase performance.

The JDM K20A, USDM K20A2 and the K24 in the TSX have the typical performance VTEC system. There is a second, higher lift and duration cam lobe for the Intake and exhaust valves. Typical VTEC engagement for these engines is 5800 RPM.

 

Im sure the tranny will hold look at the one cybernation did that ened up on turbo mag it was a auto base with over 300 whp