MoDzHuNgRy

I know this question may have been answered before but I couldn't find the answer from searching the forums. Does anyone know? Not to sound arrogant but only reply if you KNOW the answer. I've only been getting guesses from people (including techs at acura) but I really really wanna know.

Darkshear

iTrader: (1)

On my TL-P its at 3,700 ish. Might be different for TL-S though

PeterUbers

iTrader: (1)

4800 rpms, visit the acura-cl.com forum for more technical information -- they tend to be more knowledgeable than most ppl on this board.

gohawks63

4800 is correct, 3700 is waaaay too low.

ElegantTL-S

I believe both the Type S and TL-P engage around the same time. Around 4K ish.

VTEC doesn't not engage around 3,700, that's for sure. There is no Honda VTEC engine out there that engages that low.

MoDzHuNgRy

Thanks for your help. I just want to confirmation that you guys said 4800 rpms? Where was the source to this answer? Thanks again.

y2ks2k

hmm... The old school SOHC Vtec engines would switch over in the 3000's. On the DOHC VTEC, it's first stage would go at 3Kish RPMS and then kick in well after 5K (I think it was 5,500 on my B16a) RPMS on different models... God.. I cant remember my S2000's but it was around there.

T Ho

3800 is when the plenum opens up on the dual stage intake. VTEC at 4800, but I got that from here. I don't have the Helm manual, yet.
My '95 Accord EX will engage VTEC between 2300-3200rpm, dependent on throttle position, etc. This straight out of the Helm Manual.

PeterUbers

iTrader: (1)

My buddy installed a V-AFC .. when you install the unit, it'll tell you current VTEC rpm setting. Then you can reset it to whatever you want ... that's pretty compelling proof .. the car's ecu! LOL!

Allout

What's a V-AFC and what do they go for? That would be slick to play with VTEC rpm setting.

sparky57

Yes there is. Remember that there are three distinct VTEC flavors: wild, mild, and economy. Wild is found on DOHC engines like the NSX and S2000. Mild is usually SOHC as with the TL. The economy flavor was used on certain skinny wheeled Civics.


VTEC Types

rw

SpeedTrance

The VTEC kicks in right under 5000, i think at 4850 or something. I've got an Injen CAI in my car, and you can actually hear the point where it kicks in, cause the car fcuking roars. If i'm wrong someone correct me, but i've checked on this before, and this was also an observation of mine

edgalang

I can't believe this...NONE of you guys should be guessing! If you haven't read it from the forums (ATL, ACL, AW) already, at the very least you guys can click and read the ACURA website.

As the engine accelerates through 4400 rpm (4800 rpm on Type-S), the intake rocker arms transition to actuation by high-lift, long-duration cam lobes designed to optimize high-rpm output.

nickchop

Had mine tested and it clocked at 4675.

juniorbean

iTrader: (5)

I was just going to check the Acura site. I knew it was 4800RPM for the Type-S... but I wanted to provide a link. Good call.....

Oh, and the actuator actually opens at 4100rpm. Don't have a link for that... but you can test this yourself. Have someone rev the car while you're looking under the hood, and at 4100rpm you'll see the actuator click open.

phatratpak

I agree, come on guys if you really care so much bout your car you should know these things or at least take the time to look up the info, not hard to find.
there's also this...
"As the engine speed exceeds 3,800 rpm, a butterfly valve opens, allowing air to rush into the combustion chamber"

MoDzHuNgRy

Thanks for the PROOF. Just a suggestion but I think moderators should put this on the FAQs page so people like me don't have to ask this question again......include the link too.

juniorbean

iTrader: (5)

We (mods) don't control the FAQ.. but I can bring it up and have the admins edit it.

For now you can check out the CL FAQ which has all of this info

http://www.geocities.com/gamesmgr/chod/acura/