EJ8 GSR-T

can somone explain to me exactly what is the hx? why it has the wheels it does, and what the heck is vtec-e

Voyage34

http://www.leecao.com/honda/vtec/sohcvtece.html
https://honda-tech.com/zerothread?id=1414454
the HX is the proud owner of the d16y5 engine. alot of people think its ****, but there are several strong points. read Bense's "The d16y5 Civic CX project. PART 2" (the h-t thread I linked), that and the links contained therein cover most of the basics.
the HX was available as a coupe, chassis code ej7. stock it produces 115hp and 104tq. afaik its the lightest of the coupes available through those years. its wheels are cast aluminum, and weigh in at a nice 11.75 lbs versus the 18 or so lbs of stock steelies. i dont know the exact reasoning that honda used when deciding to use them, other than contributing to the light weight.

vtec-e. (the way I understand it)
vtec-e, short for vtec-efficiency, is vtec that has a lean burn mode. isntead of using a 3-lobed cam it has a 2-lobed one. when at low rpm, the smaller lobe only opens one of the intake valves per piston stroke, which uses less fuel by creating a better fuel/air mixture swirl in the chamber for greater fuel efficiency. at higher rpm, i think its about 2500 or so for the hx, the vtec system engages and locks the 2 valves together following the same larger lobe. this allows enough fuel and air to meet the higher demands when the engine is at higher rpm.
there is a much more thorough explanation in the first link i posted.

im sure there is plenty i missed so anyone with corrections/additions please chime in

schardbody

that was actually pretty good.

schardbody

oh, the ecu on the vtec-e also uses a 5 wire OEM wideband oxygen sensor compared to most narrowband sensors. there are actually 3 operation modes in a vtec-e vehicle (dont confuse with 3stage vtec) you have lean burn which is light load low throttle low rpm the motor runs near 22:1 a/f ratio. then you have normal operation, which is more load under 2600rpm and up to 3000rpm. and then you have 16v mode, which is engaged at 28-3000rpm depending on load, oil pressure, etc... for "performance". there are a bunch of die hard vtec-e guys on here, if you have one, watch for the threads, and you will find out who they are.

Voyage34

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by schardbody &raquo;</TD></TR><TR><TD CLASS="quote">there are a bunch of die hard vtec-e guys on here, if you have one, watch for the threads, and you will find out who they are.</TD></TR></TABLE>
*cough*bense*cough*
he actually has a app/cos group for the y5 and z1 vtec-e motors

schardbody

yeah, bense is a brilliant guy. he loves power but is equally conserned about efficiency.

doodooheadfart

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Voyage34 &raquo;</TD></TR><TR><TD CLASS="quote">http://www.leecao.com/honda/vtec/sohcvtece.html
</TD></TR></TABLE>

wow


i just spent about 45 min on that site