S2000 Engine Management Engine management topics, map and advice.

Best vtec engagement point

Thread Tools
 
Old Nov 17, 2009 | 10:08 PM
  #1  
EK9MAX's Avatar
Thread Starter
Registered User
 
Joined: Jul 2006
Posts: 877
Likes: 0
From: Calgary, Alberta
Default Best vtec engagement point

So I finally got my car running and i'm gonna be getting it tuned right away.

I live in calgary alberta, so i don't have the luxury mase or jeff evans here....

I do have a couple guys who've tuned 100's of cars.... but not s2000's.


I'm sure they can handle the ignition and fuel maps..... But where should i recommend them to engage VTEC at?
Reply
Old Nov 18, 2009 | 05:04 AM
  #2  
Gernby's Avatar
Former Sponsor
 
Joined: Mar 2002
Posts: 15,526
Likes: 18
Default

The best way to determine where VTEC engagement to be is to set it at around 4K RPMs, tune it, and dyno it. Then set VTEC at around 6K RPMs, tune it, and dyno it. Overlay the dyno plots so you can see where the 2 torque curves cross. That's where VTEC should engage.

However, if your car is somewhat stock, then just set it at around 5500 RPM's.
Reply
Old Nov 18, 2009 | 10:35 AM
  #3  
alSpeed2k's Avatar
Community Organizer
15 Year Member
Photogenic
Loved
Community Favorite
 
Joined: Sep 2007
Posts: 10,599
Likes: 79
From: The 604
Default

Originally Posted by EK9MAX,Nov 17 2009, 11:08 PM
So I finally got my car running and i'm gonna be getting it tuned right away.

I live in calgary alberta, so i don't have the luxury mase or jeff evans here....

I do have a couple guys who've tuned 100's of cars.... but not s2000's.


I'm sure they can handle the ignition and fuel maps..... But where should i recommend them to engage VTEC at?
I think MASE was in Calgary last month. Or was it Edmonton? If there is enough interest, I'm sure MASE could go out to Alberta again. He came to BC after Alberta and tuned about 6 cars here.
Reply
Old Nov 20, 2009 | 02:51 PM
  #4  
EK9MAX's Avatar
Thread Starter
Registered User
 
Joined: Jul 2006
Posts: 877
Likes: 0
From: Calgary, Alberta
Default

oh yea. This is a ap1 w/ 3mm headgasket and gt35r turbo...
Reply
Old Nov 20, 2009 | 04:31 PM
  #5  
93turbo16's Avatar
Registered User
 
Joined: Sep 2009
Posts: 95
Likes: 0
Default

[QUOTE=EK9MAX,Nov 20 2009, 03:51 PM] oh yea.
Reply
Old Nov 20, 2009 | 04:38 PM
  #6  
Gernby's Avatar
Former Sponsor
 
Joined: Mar 2002
Posts: 15,526
Likes: 18
Default

Originally Posted by 93turbo16,Nov 20 2009, 07:31 PM
Bat a good starting point is 5-5500.
For a turbo'ed car like the OP, it will be MUCH lower.
Reply
Old Nov 22, 2009 | 07:54 PM
  #7  
93turbo16's Avatar
Registered User
 
Joined: Sep 2009
Posts: 95
Likes: 0
Default

Originally Posted by gernby,Nov 20 2009, 05:38 PM
For a turbo'ed car like the OP, it will be MUCH lower.
Starting point my friend. It is always easier to start with it higher.

It really depends on the rest of the setup to how low it will go.
Reply
Old Nov 23, 2009 | 07:34 AM
  #8  
timg's Avatar
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Mar 2004
Posts: 2,160
Likes: 35
From: Decatur, GA
Default

Log manifold then 6500-7000 rpm.
Tubular manifold then 4000-6000 rpm.

It all depends on the setup. It's pretty easy to figure it out on the dyno. A decent tuner should have no problems.

Tim
Reply
Old Dec 3, 2009 | 09:25 PM
  #9  
thesilverbullet's Avatar
15 Year Member
Liked
 
Joined: Apr 2006
Posts: 780
Likes: 1
From: DeepSouth
Default

i'm with gernby - it will be much lower - below 4k for boost. how much boost will you see at 3.5k?

heak n/a can do 4.2k
Reply
Old Dec 4, 2009 | 07:23 AM
  #10  
camuman's Avatar
20 Year Member
 
Joined: Oct 2002
Posts: 8,044
Likes: 6
From: South Florida
Default

Originally Posted by timg,Nov 23 2009, 12:34 PM
Log manifold then 6500-7000 rpm.
Tubular manifold then 4000-6000 rpm.

It all depends on the setup. It's pretty easy to figure it out on the dyno. A decent tuner should have no problems.

Tim
listen to the man, he knows what he is talking about.
Reply



All times are GMT -8. The time now is 09:20 PM.