Why is the OHC Vtec exhaust muffler different?

normally_crazy · 9th May 2005, 18:14

Quote:

Originally Posted by Shan2nu

Spoke to Honda the other day and they said they can still provide brand new Vtec engines.

Shan2nu

why not ask them to tune it for more power since they will be providing the new engine....possible right ?

Harrie · 9th May 2005, 18:43

Quote:

Originally Posted by jigarmuni

Oh dunt i like that figure!!

.....The best part is the rev limiter hits in as late as 7500rpm..... where else in the other cars it hits in as early as 6500rpm!!

Jigar i think in the GTX its a bit higher... 7100 rpm??? i am not too sure but i have definitely seen the needle dip past 7000 rpm mark. Not sure as it is the factory tacho.

GTO · 9th May 2005, 19:14

Quote:

The best part is the rev limiter hits in as late as 7500rpm..... where else in the other cars it hits in as early as 6500rpm!!

Am I missing something? My Vtecs limiter kicks in at 7100 rpm

GTO

Shan2nu · 9th May 2005, 19:18

Quote:

why not ask them to tune it for more power since they will be providing the new engine....possible right ?

Company is not allowed to do that. Tuning companies like Mugen can take care of that though.

Shan2nu

jigarmuni · 9th May 2005, 20:35

Quote:

Originally Posted by GTO

Am I missing something? My Vtecs limiter kicks in at 7100 rpm

GTO

The redlining starts from 7100rpm, but i went beyond the 7100rpm and the limiter always kicks in at 7500rpm......!!!

Guys i have hit 7500rpm in my vtec....now i am wondering if there is something wrong with my Vtec...

GTO & shan2nu....are u sure that in your Vtecs, the limiter kicks at 7100rpm....coz.. i have driven the 1.5 also.... in the 1.5 the limiter kicks in at 7100rpm...!

Shan2nu · 9th May 2005, 21:03

Quote:

GTO & shan2nu....are u sure that in your Vtecs, the limiter kicks at 7100rpm

I'm not sure coz i usually shift at 7000 rpm. And i don't intend to try it either.

But, all magazines say that the Vtec cannot hit 100kmph (true speed) in 2nd gear which clearly means that the car cannot go beyond 7100 rpm. At 7500rpm the car should be doing 105-107kmph (true speed).

Quote:

Guys i have hit 7500rpm in my vtec....now i am wondering if there is something wrong with my Vtec...

You might want to get that clarified with Honda.

Shan2nu

jigarmuni · 9th May 2005, 22:26

shan2nu, its not necessary that the more u rev the car the more it will accelerate..! Coz... after about 6900rpm the dead zone starts....where in the car will only rev....but will not accelerate further...! The figure is different for different engines of the same make..! It may vary at about 100-300 Rpm...! So even when i rev the car till 7500rpm, it doesnt make sense...coz...after 6800 or 7000rpm the car will only make the engine noise....wont accelerate further!!

but somehow the 7500rpm figure gives a good feeling! :d

GTO · 9th May 2005, 23:13

Dude,

If anything, something is right with your Vtec

Just had a run after dinner and I can confirm that my limiter cuts it off at 71xx rpm. If your car is a pre-2002, the ECM is calibrated differently. My car is a 2003 "adjusted" ECM make.

We got to have a 0 - 100 the next time around

GTO

Shan2nu · 9th May 2005, 23:20

Quote:

Coz... after about 6900rpm the dead zone starts....where in the car will only rev....but will not accelerate further...!

Why do you think i shift at 7000, even though i still have another 100rpm to go. Hehe

But there's one thing, your engine rpm is directly related to your vehicle speed. You can't have an engine accelerating without the car gaining speed unless your clutch, any of the drivetrain/transmission components or the tyres are slipping.

Shan2nu

jigarmuni · 10th May 2005, 05:56

Quote:

Originally Posted by GTO

If your car is a pre-2002, the ECM is calibrated differently. My car is a 2003 "adjusted" ECM make.

We got to have a 0 - 100 the next time around
GTO

ahhh, u said it mate...! My Vtec is 2001...!!

But then 0-100kph, wouldnt make sense with my tyres (205/45/ZR16)..... it will be slower, then a stock Vtec also!! (Got Freeflow and K&N cone)....But i still have to clock myself...! I know its stupid...coz...clocking 0-100 is the first thing u do with ur Vtec

!

ajmat · 10th May 2005, 08:36

Reality time - as a Vtec user, the Vtec needs to be revved to get the torque out of it. It is a pain in traffic conditions, fine if you drive on highways etc where you don't need to summon the torque. I would focus on something for low down torque rather than out and out power where you need a ladder to reach to the top of the rev spectrum to get hold of the torque.

GTO · 10th May 2005, 09:24

Ajmat,

You really ought to drive my Vtec in traffic conditions - its a splendid drive. I dont know whether its the recalibrated ECM or the Speed93 but low speed driveability has never been an issue.

Butttttttttttttt I use the torque monster (my Jeep) during the day. Come late night and its time to take the Vtec on the road. Month after month, my Vtec covers more km during the a.m. than p.m.

GTO

ajmat · 10th May 2005, 10:24

Quote:

Originally Posted by GTO

Ajmat,

Butttttttttttttt I use the torque monster (my Jeep) during the day. Come late night and its time to take the Vtec on the road. Month after month, my Vtec covers more km during the a.m. than p.m.

GTO

Low speed drivability is not the issue, the low torque is frustrating at times during stop-start traffic.

You have kind of said it when you mention that you take the Vtec out at night. Unbeatable on empty roads

di1in · 28th May 2009, 18:17

There's probably no difference. I got this dual along with the free flow from Raj that i bought with SYJs help. But now i'm looking for a way to quieten it down. Any ideas guys ? It's really urgent - my dads about to kick me out !

The last one's a pic taken through the end can, i suppose it's under those perforations the glass wool is kept. Heard if i increase that it'll be more silent.. any point in that ?

9th May 2005, 22:26	#22
jigarmuni BHPian Join Date: Jan 2005 Location: Mumbai Posts: 139 Thanked: 0 Times View My Garage	shan2nu, its not necessary that the more u rev the car the more it will accelerate..! Coz... after about 6900rpm the dead zone starts....where in the car will only rev....but will not accelerate further...! The figure is different for different engines of the same make..! It may vary at about 100-300 Rpm...! So even when i rev the car till 7500rpm, it doesnt make sense...coz...after 6800 or 7000rpm the car will only make the engine noise....wont accelerate further!! but somehow the 7500rpm figure gives a good feeling! :d
	() Thanks

9th May 2005, 23:13	#23
GTO Team-BHP Support Join Date: Feb 2004 Location: Bombay Posts: 70,534 Thanked: 300,734 Times View My Garage	Dude, If anything, something is right with your Vtec Just had a run after dinner and I can confirm that my limiter cuts it off at 71xx rpm. If your car is a pre-2002, the ECM is calibrated differently. My car is a 2003 "adjusted" ECM make. We got to have a 0 - 100 the next time around GTO
	() Thanks

10th May 2005, 08:36	#26
ajmat Team-BHP Support Join Date: Feb 2004 Location: Bangalore Posts: 14,863 Thanked: 27,973 Times View My Garage	Reality time - as a Vtec user, the Vtec needs to be revved to get the torque out of it. It is a pain in traffic conditions, fine if you drive on highways etc where you don't need to summon the torque. I would focus on something for low down torque rather than out and out power where you need a ladder to reach to the top of the rev spectrum to get hold of the torque.
	() Thanks

10th May 2005, 09:24	#27
GTO Team-BHP Support Join Date: Feb 2004 Location: Bombay Posts: 70,534 Thanked: 300,734 Times View My Garage	Ajmat, You really ought to drive my Vtec in traffic conditions - its a splendid drive. I dont know whether its the recalibrated ECM or the Speed93 but low speed driveability has never been an issue. Butttttttttttttt I use the torque monster (my Jeep) during the day. Come late night and its time to take the Vtec on the road. Month after month, my Vtec covers more km during the a.m. than p.m. GTO
	() Thanks

28th May 2009, 18:17	#29
di1in BHPian Join Date: Jan 2009 Location: Thrissur Posts: 511 Thanked: 285 Times View My Garage	There's probably no difference. I got this dual along with the free flow from Raj that i bought with SYJs help. But now i'm looking for a way to quieten it down. Any ideas guys ? It's really urgent - my dads about to kick me out ! The last one's a pic taken through the end can, i suppose it's under those perforations the glass wool is kept. Heard if i increase that it'll be more silent.. any point in that ? Attached Thumbnails Last edited by di1in : 28th May 2009 at 18:19.
	() Thanks