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?

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.

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.

oh yea. This is a ap1 w/ 3mm headgasket and gt35r turbo...

[QUOTE=EK9MAX,Nov 20 2009, 03:51 PM] oh yea.

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.

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

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

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