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How aggressive should vtec be

Engine/Gearbox questions and discussion
vetrox
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How aggressive should vtec be

Post by vetrox » Thu Mar 19, 2015 6:13 pm

Ok this is a properly noob question and o feel silly just asking.

Its only because my 99 5th gen doesn't feel like it "kicks in" (well it did once but not sure if I imagined it)

The power delivery feels very linear but the engine note does get gradually more "vtecy" at about 6k

Anyone in the south east want to take me out in theirs? Tbh I haven't had a chance to go over mine with a fine comb yet.

Vtec not kicked in yo!?

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vanzep
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Post by vanzep » Thu Mar 19, 2015 6:31 pm

depends if the ecu has ben chipped then there is a less noticeable step when vtec engages
also vtec in ludes is less aggressive than in civics etc
1996-2000 1993 EG9 Blue Civic 1.6 Vti - Traded in against the BB4
2000-2019 1994 2WS BB4 Milano Red JDM Prelude Si VTEC LSD

2015 on > 1991 4WS BB1 Phantom Pearl Grey JDM Prelude Si VTEC LSD
2021 ON > 1998 2WS BB6 White Pearl JDM Prelude Si VTEC

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Post by ATR84 » Thu Mar 19, 2015 6:40 pm

Where in the south east are you? I have owned various vtecs and they all differ in kick dependent on model and mods.

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wurlycorner
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Post by wurlycorner » Thu Mar 19, 2015 6:52 pm

Yep, where are you in the south east?

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Doggo
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Re: How aggressive should vtec be

Post by Doggo » Thu Mar 19, 2015 7:03 pm

How high will the engine rev when warm and the car's moving? If VTEC isn't engaging then it won't go over 6.5k. If VTEC is engaging it'll go 7.5k+ Ps. Look where you're going!

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RattyMcClelland
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Post by RattyMcClelland » Thu Mar 19, 2015 7:05 pm

Or to actually answer the question. Your 99 will be a h22a8 so it should be silky smooth on change over.

An aggressive change overs usually means you have some torque loss before the crossover.
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vetrox
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Post by vetrox » Thu Mar 19, 2015 7:18 pm

It gets all the way to the redline without issue but with all the talk I hear of vtec slamming people into their seats (you know how the internet is) I wasn't sure how smooth it would be. I need to get her on the dyno really to see what's what

Thanks for the replies though and im in Dover, Kent. About as far south east U can get XD

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Donald
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Post by Donald » Thu Mar 19, 2015 7:22 pm

The people that go on about VTEC slamming them into their seats are the same kind of people that like to watch someone slamming into their mrs. i.e. Civic/Teg owners. Don't listen to them. Smooth crossover is good, as Ratty says.

vetrox
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Post by vetrox » Thu Mar 19, 2015 8:56 pm

currently at work but read that it works off oil pressure and low oil can cause issues with vtec. Just gone out to check the oil level and there's none in there (that's what I get for hastily buying a car)

I was given some spare oil but not much. Its almost at the minimum mark now. Hopefully a petrol station will have some

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lewd lude lover
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Post by lewd lude lover » Thu Mar 19, 2015 11:49 pm

that sounds fine to me. You have a well tuned and well operating engine, just top up the oil. The vtec 'kick' is a drop in power and torque just before the second cam comes in. A linear power curve is very much more desired for going fast. Be happy, its all good.
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