my gsr isnt my daily driver, and i took it out earlier today, i was at a stoplight, and i started to accelerate and waited to shift until the secondary runners to opened up, but they never activated. so i thought nothing of it and shifted, but they didnt activate in second gear either, in fact they didnt start working until after i had stopped by a friends work to talk to him about this problem. but when they did start working, they opened up at roughly 6500-6600 rpm. anyone know what the hell's goin on with my intake manifold???? if it matters the im is stock.....

 

Did you have it floored? If I remember correctly, the secondaries may not open if you're not @ WOT.

 

I have heard this too...

 

dude i was redlining it, and i got nothing........

 

Double check for a vaccum leak in the lines on the I/M. I believe the secondaries are vaccum controlled. Otherwise, they might be stuck... it happens, you'll need to lube them. How old is the engine ?

X2


[Modified by X2BOARD, 9:42 AM 9/13/2002]

 

your probably mistaken of vtec and secondaries
secondaries u can barely hear.

and if u talk ur car out before its warmed up
vtec wouln't engage. so its one or the other.

 

Do you have a GSR ? Damn, because I can hear and feel secondaries open up.... it's not suttle at all.

 

i had one in my 95, and i have one in my hatch
????

 

And you can't feel/hear your 2ndaries open ?

 

I had read somewhere that the secondaries don't open till around 6500 rpm's. Vtec switches over around 4500-4800. The motor has to be fully warm and moving for vtec to happen but not the secondaries. They will open with the car in nuetral. Try a search on the Integra forum under "secondaries". There is a ton of info there.

 

for stock gsr's....vtec switches at 4400 rpm and the secondaries open at 5750 rpm. You should definitely be able to hear them...especially if you have an intake.

s

 

the secondary Butterflies open up at soon as the is no vac. pres. when there is no vac. presure. they are always open. the secondary runners help the bottom end not the top.......

 

LOL.... You have that backwards slick. The secondaries open up the short, fat runners. They help the top end not the bottom end. The primaries are for good low end tq.



X2

 

o.k. take the same car.... dyno them.... one working the butterflies and one not working, look at the torque and the lower end of the graph. they correspond to the bottem endin a positive manner when the butterflies are working.

 

So basically, you are saying is that the Honda engineers are a bunch of idiots as they obviously didn't know what they were doing when they designed the dual stage IM for the GSR.... ?

K....


Do you know what the difference in performance is with a long runner vs a short runner, concerning low end tq and high end hp ? Please... explain... I'm all ears.

X2

 

My bad, that is what I was trying to imply. they do infact open the shorter runners. which does help the top end. I stand corrected.


[Modified by thegrinch, 7:49 PM 9/13/2002]

 

Um..
nevermind. not even gonna argue

 

argue what?

 

*AHEM* Back on topic.

You can redline without being @ WOT. In which case, the secondaries may not activate, depending on how far the throttle is open.

 

Are you sure your vtec is working at all? most of the time if your vtec isnt working your low on oil.

Keith

 

I have herd that if your car sits to long that vtec wont actavate due to it getting stuck in what i guess you would call the off position.

 

I don't really think VTEC is something that CAN get "stuck" per say. Secondary runners yes, VTEC, very very rare.

 

i'm gonna check out the vaccum lines sometime tomorrow whenever i get a chance to drive up to where it's parked..... the engine actually has about 123,000 miles on it......... the original owner loved to try and pimp it through town all night..... i've done what i could so far to try and fix up the engine, it looks and sounds a hell of a lot better than when i first got the car, but i'm still not done, the bottom end is gonna be next........and as for those questioning the amount of oil and its pressure, i canged the oil about 1200 miles ago with some good ol mobil one......

 

yeah, the vtec engagement has absolutely nothing to do with the intake manifold runners, they are two entirely different processes that dont interfere with each other at all. this problem deals only with the intake manifold and it's affiliating parts. thank you for your imput though...... maybe i should just make this all a lot easier and drop a newer C1 in the car...........hmmmmm

 

they are vacuum actuated so if your cruising at 8kRPM they wont open

2ndaries only improve low end when they are shut