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tecdippin03 · 09-06-2006, 12:55 AM

i was wonderin what rpm should i have my vtec kick in...some people say having too low is bad for tha head...what do u guys think...

reikoshea · 09-06-2006, 03:50 AM

what kinda engine and what ecu?

tecdippin03 · 09-06-2006, 12:25 PM

b16a and a stock ecu for now..

reikoshea · 09-06-2006, 12:52 PM

if memory serves, its set to kick on at 5000, but most people find its better to set it at about 5500.

TurboMirage · 09-06-2006, 01:15 PM

vtec should kick in the mornin', you kno like an alarm clock! you s'posed to be up makin breakfast!

reikoshea · 09-06-2006, 01:23 PM

Quote:

Originally Posted by TurboMirage

vtec should kick in the mornin', you kno like an alarm clock! you s'posed to be up makin breakfast!

somebody needs to stop talking to jeffie. breakfast is for the weak.

tecdippin03 · 09-06-2006, 07:57 PM

wats wrong with it being lower

gringotegra · 09-06-2006, 08:30 PM

think of it this way...higher the rpm=bigger vtec kick in...lower the rpm=lower the vtec kick in...i like the 5000-5500 vtec kick in...and for your b16 id say 5000..b16's pull pretty good in high rpm..its just that lack or the torque down below..that vtec set at 5000 is gunna be a difference you will notice...but if youc an get that VFAC..that should be a big difference...but if you dont know how to tune it so say then take it to somebody that knows what they are doing...

tecdippin03 · 09-06-2006, 11:03 PM

but would vtec kicking in at lower help the torque...at low rpms

reikoshea · 09-06-2006, 11:14 PM

no....it usually hurts your overall power curve

tecdippin03 · 09-07-2006, 12:35 AM

oooh ok...so the higher it kicks in the more power its gonna make... soo the only way to see how it gets tha most power is to put it on a dyno and adjust the vtec point

reikoshea · 09-07-2006, 12:37 AM

exactly....its not that you make more power the higher the engagement, its that you loose power the lower the engagement.

get it on the dyno and smooth out your powercurve. when the curve is smooth, youve got the right point.

tecdippin03 · 09-07-2006, 12:42 AM

ooohh ok thanks alot

Calesta · 09-07-2006, 08:47 PM

Look at these dyno graphs of mine:

The first two are examples of where VTEC should be set earlier to smooth out the curve- the latter is an example of where VTEC should be set later to smooth the line out. You want the least noticeable transition from the non-VTEC to the VTEC lobes on your cam. That's when you'll make the most power at every point in the rev range.

Too early and your engine stumbles while it tries to get into the efficiency range of your big lobe- too late and you have a huge jump where you could have had more power a few hundred rpm sooner. The first graph had the VTEC set later (4400rpm) so that I wouldn't be jumping in and out of VTEC all the time on the highway, the second is the stock S2000 (6000rpm) that Honda sets so that the customer can feel the VTEC kick in (sells cars because it's cool, but isn't the best for max power), and the third was just set too early because it wasn't a custom tune.

Hopefully that gives you a more visual explanation of why you want to set your VTEC crossover point on the dyno.

tecdippin03 · 09-08-2006, 12:33 AM

sooo i cant really figure out where i should put it because every engine is different so i have to use a dyno...what the spot i should put it ay untill i tune it

reikoshea · 09-08-2006, 12:38 AM

5000-5200 on a stock engine is what id suggest

JDM_EK9R · 12-20-2006, 06:10 PM

5500 rpm on stock motor/ecu.

hazzardboy95 · 12-21-2006, 10:14 AM

The 5000-5500 is good because if you were to set it down low it would almost be like having a non-vtec motor like mine. They did that stupid shit when they made the rsx non type-s motor. It kicks inat about 3200 rpms and its not even worth having. High=good, low=bad. But you cabt set it to high. The point of the vtec is made to get you through the upper rpm range faster. If you set it at 6000, and your redline is 7000 then its not going to realy do anything. Again, almost like having a non-vtec motor. Hope this helps.

myah · 12-23-2006, 12:58 PM

5500 thats were is should kick in unless you got a chipped ecu

hazzardboy95 · 12-23-2006, 07:37 PM

Im not sure, if you have a chipped ecu it changes your vtec engagement and your rev limit right? I think it does. If it does thats another thing you need to watch out for. For one, you are going to stop making power at about 7 or 8 grand and if you can take it past that you take the chance of throwing the valve into the piston if you have stock equipment. You will get valve float is what I meant. The stock springs wont pull you valve back fast enough and it will hit the piston. Just another thing to watch out for.

psi · 12-27-2006, 08:58 AM

Since we are on the topic of where to set the VTEC... How about for a GS-R b17? I feel it kick in at like 6000. The redline starts at 8000 and tops at 9000. Is 6000 a good place to have my vtec to start?

eg6sir · 12-27-2006, 10:19 AM

it should be the same as the b16 at 5500 not 6k^^.. i used to think mine was at 6k because thats when it got louder, but its not

TurboMirage · 12-27-2006, 01:51 PM

vtec should kick in in the mornin, its like an alarm clock.

JDM_EK9R · 12-27-2006, 02:00 PM

you hear it kick in higher because you have a two stage manifold. most vtec engine run with a lo/hi vtec. the secondaries open up usually 800rpm higher but thats on a stock ecu. all settings are different on different ecus. your best bet would be to get an obd1 ecu and have it chipped to what your tuner thinks it best.

reikoshea · 12-28-2006, 01:03 AM

why the hell is this thread back from the dead.

STOP IT.

09-06-2006, 12:55 AM	#1
tecdippin03 Member Join Date: Aug 2006 Posts: 47 iTrader: 0 / 0% Rep Power: 8	where should vtec kick in??? i was wonderin what rpm should i have my vtec kick in...some people say having too low is bad for tha head...what do u guys think...

09-07-2006, 08:47 PM	#14
Calesta Admin with a big stick Join Date: Sep 2002 Location: Dallas / Fort Worth, TX Age: 32 Posts: 25,366 iTrader: 0 / 0% Ride: 2003 S2000 Rep Power: 389	Look at these dyno graphs of mine: The first two are examples of where VTEC should be set earlier to smooth out the curve- the latter is an example of where VTEC should be set later to smooth the line out. You want the least noticeable transition from the non-VTEC to the VTEC lobes on your cam. That's when you'll make the most power at every point in the rev range. Too early and your engine stumbles while it tries to get into the efficiency range of your big lobe- too late and you have a huge jump where you could have had more power a few hundred rpm sooner. The first graph had the VTEC set later (4400rpm) so that I wouldn't be jumping in and out of VTEC all the time on the highway, the second is the stock S2000 (6000rpm) that Honda sets so that the customer can feel the VTEC kick in (sells cars because it's cool, but isn't the best for max power), and the third was just set too early because it wasn't a custom tune. Hopefully that gives you a more visual explanation of why you want to set your VTEC crossover point on the dyno. __________________ DO NOT PM me with tech questions! Use the forums! Intercrew Auto Salon - (972) 485-8688

12-21-2006, 10:14 AM	#18
hazzardboy95 Hon-daaaa Join Date: Dec 2006 Location: Pasadena, Md Posts: 671 iTrader: 0 / 0% Ride: 95 TEGGY Rep Power: 13	The 5000-5500 is good because if you were to set it down low it would almost be like having a non-vtec motor like mine. They did that stupid shit when they made the rsx non type-s motor. It kicks inat about 3200 rpms and its not even worth having. High=good, low=bad. But you cabt set it to high. The point of the vtec is made to get you through the upper rpm range faster. If you set it at 6000, and your redline is 7000 then its not going to realy do anything. Again, almost like having a non-vtec motor. Hope this helps. __________________ When my parents asked me what i wanted to be when i grew up you know what I said The garage.... 2005 bmw x5 2007 ford roush mustang 1987 jeep wrangler 1993 honda civic hatch 1998 isuzu amigo 1995 ACURA INTEGRA (\_ /) ( 0.o) ( > <)World domination will be ours....

12-23-2006, 07:37 PM	#20
hazzardboy95 Hon-daaaa Join Date: Dec 2006 Location: Pasadena, Md Posts: 671 iTrader: 0 / 0% Ride: 95 TEGGY Rep Power: 13	Im not sure, if you have a chipped ecu it changes your vtec engagement and your rev limit right? I think it does. If it does thats another thing you need to watch out for. For one, you are going to stop making power at about 7 or 8 grand and if you can take it past that you take the chance of throwing the valve into the piston if you have stock equipment. You will get valve float is what I meant. The stock springs wont pull you valve back fast enough and it will hit the piston. Just another thing to watch out for. __________________ When my parents asked me what i wanted to be when i grew up you know what I said The garage.... 2005 bmw x5 2007 ford roush mustang 1987 jeep wrangler 1993 honda civic hatch 1998 isuzu amigo 1995 ACURA INTEGRA (\_ /) ( 0.o) ( > <)World domination will be ours....

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09-06-2006, 03:50 AM	#2
reikoshea HS Troll...And Mod Join Date: Apr 2005 Location: San Antonio, TX Age: 24 Posts: 10,929 iTrader: 0 / 0% Ride: 2001 Honda S2000 Rep Power: 254	what kinda engine and what ecu?

09-06-2006, 12:25 PM	#3
tecdippin03 Member Join Date: Aug 2006 Posts: 47 iTrader: 0 / 0% Rep Power: 8	b16a and a stock ecu for now..

09-06-2006, 12:52 PM	#4
reikoshea HS Troll...And Mod Join Date: Apr 2005 Location: San Antonio, TX Age: 24 Posts: 10,929 iTrader: 0 / 0% Ride: 2001 Honda S2000 Rep Power: 254	if memory serves, its set to kick on at 5000, but most people find its better to set it at about 5500.

09-06-2006, 01:15 PM	#5
TurboMirage Running on two cylinders Join Date: May 2003 Location: Southbridge, MA Age: 26 Posts: 18,657 iTrader: 1 / 100% Ride: 2000 Mitsubishi Lancer RPW E5 Coupe Rep Power: 439	vtec should kick in the mornin', you kno like an alarm clock! you s'posed to be up makin breakfast!

09-06-2006, 07:57 PM	#7
tecdippin03 Member Join Date: Aug 2006 Posts: 47 iTrader: 0 / 0% Rep Power: 8	wats wrong with it being lower

09-06-2006, 08:30 PM	#8
gringotegra 100% stock GSR... Join Date: Sep 2006 Age: 22 Posts: 34 iTrader: 0 / 0% Rep Power: 8	think of it this way...higher the rpm=bigger vtec kick in...lower the rpm=lower the vtec kick in...i like the 5000-5500 vtec kick in...and for your b16 id say 5000..b16's pull pretty good in high rpm..its just that lack or the torque down below..that vtec set at 5000 is gunna be a difference you will notice...but if youc an get that VFAC..that should be a big difference...but if you dont know how to tune it so say then take it to somebody that knows what they are doing...

09-06-2006, 11:03 PM	#9
tecdippin03 Member Join Date: Aug 2006 Posts: 47 iTrader: 0 / 0% Rep Power: 8	but would vtec kicking in at lower help the torque...at low rpms

09-06-2006, 11:14 PM	#10
reikoshea HS Troll...And Mod Join Date: Apr 2005 Location: San Antonio, TX Age: 24 Posts: 10,929 iTrader: 0 / 0% Ride: 2001 Honda S2000 Rep Power: 254	no....it usually hurts your overall power curve

09-07-2006, 12:35 AM	#11
tecdippin03 Member Join Date: Aug 2006 Posts: 47 iTrader: 0 / 0% Rep Power: 8	oooh ok...so the higher it kicks in the more power its gonna make... soo the only way to see how it gets tha most power is to put it on a dyno and adjust the vtec point

09-07-2006, 12:37 AM	#12
reikoshea HS Troll...And Mod Join Date: Apr 2005 Location: San Antonio, TX Age: 24 Posts: 10,929 iTrader: 0 / 0% Ride: 2001 Honda S2000 Rep Power: 254	exactly....its not that you make more power the higher the engagement, its that you loose power the lower the engagement. get it on the dyno and smooth out your powercurve. when the curve is smooth, youve got the right point.

09-07-2006, 12:42 AM	#13
tecdippin03 Member Join Date: Aug 2006 Posts: 47 iTrader: 0 / 0% Rep Power: 8	ooohh ok thanks alot

09-08-2006, 12:33 AM	#15
tecdippin03 Member Join Date: Aug 2006 Posts: 47 iTrader: 0 / 0% Rep Power: 8	sooo i cant really figure out where i should put it because every engine is different so i have to use a dyno...what the spot i should put it ay untill i tune it

09-08-2006, 12:38 AM	#16
reikoshea HS Troll...And Mod Join Date: Apr 2005 Location: San Antonio, TX Age: 24 Posts: 10,929 iTrader: 0 / 0% Ride: 2001 Honda S2000 Rep Power: 254	5000-5200 on a stock engine is what id suggest

12-20-2006, 06:10 PM	#17
JDM_EK9R all motor Join Date: Nov 2006 Location: central, NJ Age: 26 Posts: 81 iTrader: 0 / 0% Ride: 1997 ek9 (civic hatchback) Rep Power: 7	5500 rpm on stock motor/ecu.

12-23-2006, 12:58 PM	#19
myah Neu Impact Performance Join Date: Jul 2006 Location: ks Age: 23 Posts: 226 iTrader: 0 / 0% Ride: 95, 4 door integra, 04 Acura TL Rep Power: 10	5500 thats were is should kick in unless you got a chipped ecu

12-27-2006, 08:58 AM	#21
psi Junior Member Join Date: May 2003 Posts: 54 iTrader: 0 / 0% Rep Power: 14	Since we are on the topic of where to set the VTEC... How about for a GS-R b17? I feel it kick in at like 6000. The redline starts at 8000 and tops at 9000. Is 6000 a good place to have my vtec to start?

12-27-2006, 10:19 AM	#22
eg6sir Führer Mod Join Date: Aug 2005 Location: 661 BK CA Age: 29 Posts: 16,244 iTrader: 4 / 100% Ride: Le Car Blog Entries: 1 Rep Power: 464	it should be the same as the b16 at 5500 not 6k^^.. i used to think mine was at 6k because thats when it got louder, but its not

12-27-2006, 01:51 PM	#23
TurboMirage Running on two cylinders Join Date: May 2003 Location: Southbridge, MA Age: 26 Posts: 18,657 iTrader: 1 / 100% Ride: 2000 Mitsubishi Lancer RPW E5 Coupe Rep Power: 439	vtec should kick in in the mornin, its like an alarm clock.

12-27-2006, 02:00 PM	#24
JDM_EK9R all motor Join Date: Nov 2006 Location: central, NJ Age: 26 Posts: 81 iTrader: 0 / 0% Ride: 1997 ek9 (civic hatchback) Rep Power: 7	you hear it kick in higher because you have a two stage manifold. most vtec engine run with a lo/hi vtec. the secondaries open up usually 800rpm higher but thats on a stock ecu. all settings are different on different ecus. your best bet would be to get an obd1 ecu and have it chipped to what your tuner thinks it best.

Hondaswap.com | Honda Technical & JDM styling Forums

where should vtec kick in???

12-28-2006, 01:03 AM	#25
reikoshea HS Troll...And Mod Join Date: Apr 2005 Location: San Antonio, TX Age: 24 Posts: 10,929 iTrader: 0 / 0% Ride: 2001 Honda S2000 Rep Power: 254	why the hell is this thread back from the dead. STOP IT.