Hi,

I don't know if this is a really dumb question or what! I expect it is! I've fitted my emanage and its all good, but I'm not going to have it tuned for a little while. What happens if I lower the VTEC point now? So it still running standard fuel map and ignition ****, but with a lower point. Is it gonna screw?

Thanks!

 

pleeeeeease!

 

depending on your mods...but usually lowering vtec x-over more than a few hundred rpms will do nothing but bog the car

 

Intake, header, test pipe, cat back.

 

My VTEC setting works the best at 5k, it didnt like anything less on the dyno.

 

But thats what Im saying, I'm not having it dyno tuned for a little while, so in the mean time can I drop the vtec to 5k and it'll be ok?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by towns &raquo;</TD></TR><TR><TD CLASS="quote">But thats what Im saying, I'm not having it dyno tuned for a little while, so in the mean time can I drop the vtec to 5k and it'll be ok?</TD></TR></TABLE>

5k is generally good, dropping under 5k usually does no good.

 

OK cool.



What do I nudge the other factors to then?

Thanks for your help

 

Sorry, gay tripod.

 

Anyone before I cry!

Thanks!!

 

Just do whatever feels the best. If you set it at 5k and it bogs try higher or lower

 

Modified by HondaGuy02 at 4:55 PM 4/28/2004

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HondaGuy02 &raquo;</TD></TR><TR><TD CLASS="quote">

and possibly bend a few valves </TD></TR></TABLE>

... what are you talking about? why lowering the vtec x-over will cause bending valves.... it's ridiculous....

 

 

Modified by HondaGuy02 at 4:55 PM 4/28/2004

 

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

... what are you talking about? why lowering the vtec x-over will cause bending valves.... it's ridiculous....</TD></TR></TABLE>

 

Modified by HondaGuy02 at 4:55 PM 4/28/2004

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HondaGuy02 &raquo;</TD></TR><TR><TD CLASS="quote">

lol... are you a believer in the nonbending valves theory too ?

give me a break </TD></TR></TABLE>


hahahahahah, no bending valves. you lower your vtec to 3k rpms and nothing would hapen, but loose power.

you ''theory'' makes no sense.
compression height does not change, if you engage vtec at 3000 rpms, then the cam will lift the valves the same amount that it would do at any rpms

 

Modified by HondaGuy02 at 4:55 PM 4/28/2004

 

Just screwing around I used to set my vtec at 2500 just to over cam the hell out of engine at such a low rpm. Luckily I never bent a valve PHEW!!!! Please explain how this theory is possible. Cuz I don't buy it one bit. I'm sure everyone would like to know this.

 

How would it cause bending valves? If you lower vtec, it's similar to having a slightly more aggressive stage 1 cam. It doesn't bend valves (as far as I've ever heard) it just makes the car run a little rougher at low rpms. That's why the skunk2 stage2's sound badass at idle, cus they're built to purr like a kitten at 5k or somewhere up in the power band. I find it hard to believe that it would bend valves (maybe over the course of several years), you'd prolly be running stanky and rich at low rpms, and people would make fun of you for setting the vtec so low.

 

you better go study the vtec theory(and the basic 4 cycle engine theory) again then come back here and discuss this with us..... i am serious.


tell me why you think lowering the vtec x-over will cause this?

during piston moving upward and downward there is always a constant clearance between the valve face and the piston dome. this clearance changes when the vtec kicked in but not related to what rpm the vtec kicks in. if the valve and the piston will hit each other, thats due to a failure clay test, improper engine installation.

that means they will hit each other whenever the vtec is kicked in, no matter its at 2000rpm or 10000rpm.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by skyripper &raquo;</TD></TR><TR><TD CLASS="quote">you better go study the vtec theory(and the basic 4 cycle engine theory) again then come back here and discuss this with us..... i am serious.
</TD></TR></TABLE>

I dont take advise from anyone who has the name skyripper.


Modified by HondaGuy02 at 4:56 PM 4/28/2004

 

my car has a B18B1, non vtec engine. but it doesnt matter to me to understand those theories. and if i found myself lack of knowledge i will learn instead of believing things without reasons.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HondaGuy02 &raquo;</TD></TR><TR><TD CLASS="quote">
I dont take advise from anyone who has the name skyripper.
</TD></TR></TABLE>


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HondaGuy02 &raquo;</TD></TR><TR><TD CLASS="quote">
Maybe you guys are right, maybe it would never bend your valves no matter how low your vtec cross over point is but i still think it could cause bent valves.
</TD></TR></TABLE>
we are right. 100% right.
maybe try think it again hundred times you will realize.

what cause valve bent is improper valve timing or lack of piston dome to deck(or valve face) clearance or the rpm past the range that valve spring can control(which wont occur when you lowering the vtec x-over). all the relative position of the piston, the intake valve, and the exhaust valve between each other wont change during rpm is increasing. if at 500rpm the piston doesnt hit the valve so do 5000rpm. so the same situation when vtec is engaged.

good luck.

 

If you were going to bend a valve it would be at high rpm not low rpm. And especially if you have too much valve lash.