is it bad to run in vtec for a long time? i have the JDM S1 tranny and Mugen program ecu which puts my vtec xover at 4500 RPM. so if i wanna go faster than 72 mph i’m in vtec full time. other than just the high revs, will this cause any damage or premature wearing? seems like it wouldn’t but i want to be sure
i think it would be fine… maybe ever so slightly harder on it since it more HP but earlyer. also i dont have any clue what im talking about its just a guess. but does anything change besides the cam lobes that would hurtthe motor in the long run?
well there’s the obvious thing of your gas mileage flying away and never coming back…but other than that i think i’ll be fine 
I had a 94 GSR (RIP)
, but its coo-it dosent affect anything (except cutting your gass mileage in about halF!!) but theres no prob
Fing: thank you so very much for your totally uneducated guess. i used to go off about people like you, but i will try and hold back this time…:mad:
to all else, thanks for the input. i figured it woudln’t, but wasn’t sure if there might be something i wasn’t considering in the scheme of things. it’s just too bad gas costs so much. all will be well when i get the 5th gear swap or the V-AFC. but at least i don’t have to go under 70 on the highway anymore.
What are you doing going over 65MPH anyway? I don’t know of any speed limit locally higher than that!!
Just unplug the VTEC solenoid anytime you anticipate going over 72MPH. If need be just pull over and proceed with this action.
But in all seriousness, what is your redline anyway? And at about what RPM’s are you keeping the motor at during hwy driving? I’d be kinda scared about floating a valve, but that shouldn’t happen if your RPM’s aren’t terribly outrageous.
The higher the revs the faster your belt driven accessories will be going and will need replacement sooner and it will cause the engine to wear faster than lower revs. Would it not?
Re: is it bad to run in VTEC for extended periods?
Originally posted by Habitforming
is it bad to run in vtec for a long time? i have the JDM S1 tranny and Mugen program ecu which puts my vtec xover at 4500 RPM. so if i wanna go faster than 72 mph i’m in vtec full time.
I had no idea the S1 was like that. My YS1 puts me at about 4k RPMs @ ~80mph. All I can say is wow, those are short gears! :shock:
4k rpm at 80mph? DANG thats good, my ys1 puts me to about 70-73 the most at 4k rpm
Leftcorner: My redline is 8k and going the speed i like to, 80 mph, is about 5k rpm. floating a valve there shouldn’t be a problem, and if it is, i don’t like honda anymore.
about unplugging the solenoid… i did that last time i came back here to lexington, and obviously it threw a check engine light the whole way back. but when i hooked it back up the car now seems a lot slower. that is another subject altogether, but i can’t figure out what would have changed/been damaged to make the car slower if i was driving with vtec unhooked.
b17a: yeah i really don’t like the S1 for hwy driving at all. i need to do the 5th gear swap soon!
KISS MY ASS
i mean im sorry next time i wont say im just makeing a guess. and thanks for not going off on me:bored:
Originally posted by Habitforming
[B]Leftcorner: My redline is 8k and going the speed i like to, 80 mph, is about 5k rpm. floating a valve there shouldn’t be a problem, and if it is, i don’t like honda anymore.
about unplugging the solenoid… i did that last time i came back here to lexington, and obviously it threw a check engine light the whole way back. but when i hooked it back up the car now seems a lot slower. that is another subject altogether, but i can’t figure out what would have changed/been damaged to make the car slower if i was driving with vtec unhooked.
b17a: yeah i really don’t like the S1 for hwy driving at all. i need to do the 5th gear swap soon! [/B]
I’ve got a JDM XSi which does about 4000rpm @ 115kmh in 5th (from memory). Thats why the VTEC crossover isn’t until 5500rpm.
One solution would be to add a vtec controler, and put the crossover up when you’re on the highway 
One solution would be to add a vtec controler, and put the crossover up when you’re on the highway
Yep, that was the plan, but i’m a poor college student now, and $300 isn’t that easy to come by.
Originally posted by Disinfo
[B]
I’ve got a JDM XSi which does about 4000rpm @ 115kmh in 5th (from memory). Thats why the VTEC crossover isn’t until 5500rpm.
One solution would be to add a vtec controler, and put the crossover up when you’re on the highway [/B]
I think the xover is 4500 for lobes and 6500 for secondaries;)
Originally posted by Stevie D
[B]
I think the xover is 4500 for lobes and 6500 for secondaries;) [/B]
huh?
It would help if you got a VTEC controller and set the higher cam lobe to engage later for various reasons, the main being so you don’t lose low end power by running a high end cam lobe at too low of an RPM. As for running with the high RPM profile engaged for a long period of time, it shouldn’t be harmful except the normal wear and tear of high RPM’s on the engine(belts, valvetrain etc…). While I lived in Germany, I used the upper cam lobes quite a bit on the autobahn. In fifth gear, it switches at about 100mph. I remember one trip to Garmisch-Partenkirschen I followed my dad in his SAAB averaging about 105mph. We both ended up averaging about 21 mpg. The lowest gas mileage I have gotten was when it was driven autobahn to the Nuerburgring, three laps on the Nuerburgring(14miles per lap), and then back on the autobahn. I got about 17 mpg then but it was more than explainable and more than worth it. Normally with my normal commute through the curvy mountain roads and then on the autobahn I got around 24 mpg.
Originally posted by Habitforming
[B]
huh? [/B]
The vtec xover point. The vtec is 2 parts. It switches the lobes to a higher lift @ 4500 and opens the secondariy butterflies (part of the im) @ 6500
Originally posted by Stevie D
[B]
The vtec xover point. The vtec is 2 parts. It switches the lobes to a higher lift @ 4500 and opens the secondariy butterflies (part of the im) @ 6500 [/B]
I’m pretty sure that g3 gsr’s are the only dohc vtec engines with that intake manifold crap.
Originally posted by 93gsr
[B]
I’m pretty sure that g3 gsr’s are the only dohc vtec engines with that intake manifold crap. [/B]
yeah…I had a 94 gsr and now I have a 91ls so thats all I know. I wasn’t sure though but thought id throw it up
no secondaries in my IM buddy, but thanks