Last night i noticed that my VTEC wasn't kicking in and my secondary butterflys were coming on at 5000 instead of 4400.

I reset my computer and checked the wires and they were all connected.
Any ideals?


[Modified by gsrhatch530, 11:14 PM 3/28/2002]

 

Secondary Butterflies usually open at 5500-6000rpm. VTEC is at 4400 on a GSR.

 

the secondaries on my car switch on usually around 5k you hear that switch (I used to think that was vtec) but the vtec I can hear turn on at mid 4's hear the strange mechanical buzz. Was the motor cold when you were testing it? I have noticed i dont hear vtec easily when the motor isn't at idle temp.


[Modified by vincent97gsr, 1:41 AM 3/29/2002]

 

vtec is at 4700 and secondary butterflies are at 6000rpm

 

In my 99 GS-R, VTEC engages at 4500 RPM and dual stage butterflies open at about 5000 rpm. If the engine is cold, you cant hear it. Do this, after you warm up the engine, get onto a somewhat open road where there arent too many cars that will come up behind you. When you start off in 1st, slowly accelerate and dont shift. Listen closely for VTEC engagement and dual stage opening. Hope I helped.

 

so wait, vtec is at 4400 on a gsr? i hear mine at 5700, is that those butterfly things you were talking about? what are the butterfly things?

 

gsr's has 2 stage vtec.
stage 1 opens at 4700k i believe
and secondary stage opens at 6000k.

 

GSR's do not have 2 stage VTEC!!
VTEC engages at 4400rpm.
Secondary runners/butterflies open up at 6000rpm, these are in the inlet manifold and have nothing to do with VTEC engagement. They allow extra air to be flowed through the inlet manifold at 6krpm and above

 

Check your engine oil level

 

 

GHA ! Vtec engages at 4400 RPM'S.
The secondary runners open at 5700....Thats it.

You should be able to tell, excuse me "hear" it happening if you have an intake. Thats all it takes to make is noticable...to make it noticable to your ears that is.

 

i call it 2 stage vtec so bleh.
remember 4.25 of oil.


[Modified by Lilmumbler, 4:23 AM 3/29/2002]

 

No VTEC? Check your oil level. Makes a difference if the engine has been warmed up too.

 

Well with my experience it could be caused by one of three things. OIL! OIL! OIL!

 

Yes, they are pretty butterflies too!
KEYWORD: Secondary Runners

Of course you can't, the temperature hasn't risen... thus the engine does not allow for VTEC engagement. Yet, the ECU can't control the opening of the runners... it happens regardless of temperature.

I wish my GSRs 1st stage of VTEC opened at 4,700,000RPM, and then for my secondaries to open at 6,000,000RPM!?!?!? DAMN, that'd be insano!

[BEGIN RANT]And we question why Honda-Tech is slowing becoming less and less informative?!?!?[/END RANT]

PLEASE DUSTIN, PLEASE GET THE SEARCH FEATURE BACK UP SOON!!!!

 

you had me going for a while...until I saw it was you. then saw the three extra zero's and started dying laughing at myself.

for e'body else....you must got some lil hamster ears to hear VTEC engage on a GS-R.

 

If you have intake and rev up slowly you MIGHT, notice I said might, hear VTEC engage. It'll be a very slight sound changover.

 

you are an idiot for talking out of ur ***.
vtec engages at 4400 rpm ONLY if the motor is at the right temperture and oil pressure. and the loud noise you hear at 5800 is ur secondary butterflies opening. if you still dont believe me take off ur whole exhaust system and drive ur car around with open dp or cat. you can completely hear vtec engage at 4400 rpm. if any of you noobs want to believe otherwise go back to SHO.
for any those that wanna learn something try this experiment:

go out to ur car with a friend. then pop the hood and look for a valve on the drivers side of ur intake manifold, it should have a vacuum hose and a lever on it. now notice the position of the lever. the position that its currently in means the butterflies are currently open. now have ur friend start the motor. you should immediately see the lever move which means that the secondary butterflies are now closed. now have ur friend rev the motor to 5800 rpm or above and you will immediately see the valve move back to the open position. by now you should understand how the secondary butterflies work.


[Modified by 01geeser, 8:34 AM 3/29/2002]

 

No sir, I think you're the stupid one here. VTEC on a GSR is at 4400 rpm. Secondary runners open at 6k. Pass smog? What kinda **** is that? They don't rev the engine past 3k for smog check. Only B16A and ITR engines have the VTEC set up higher because they use a SINGLE intake runner.

Here's proof
http://members.aol.com/josh3030/specifications.html

Look under the VTEC engagement on that page.



[Modified by SpecR_EK, 12:37 AM 3/29/2002]

 

wait, wait WTH is Vtec?

j/k

vtec kicks *** and it does engage at 4,400 rpm and i believe the butterfly valve opens @5,800 rpm.

 

you ******* iddiots

what is it with EVERY noob saying his vtec engages in the 5k+ range on their b18c1's?

ITS 4,400 at normal oil level and temp..MY GOD

JC, you have proven to be an iddiot...your probably running an unchiped p28 and dont know it, or you mysteriously go DEF when your car passes 4.4k...and regain your hearing once the 2ndary runners start doing their thing?

sorry i just cant take it anymore


[Modified by hybrider93, 1:55 AM 3/29/2002]

 

This is a special message for ALL YOU GUYS!.

 

 

Sorry about the double post, it had the red x so i didn't know blah blah...and even if VTEC engages at 4400 RPM or 5k RPM and the secondary butterfly(sorry about profanity)

 

Vtec hits between 4400-5000 depending on how hard you give the car gas. At WOT Vtec hits at 4400. Secondairy butterfly opens up at 5700.
All I know is my vtec is louder then the secondaries. I guess its because of the exhaust.


[Modified by Fooser, 4:03 PM 3/29/2002]