Need help on Engine infomation+Tuning

[civiclsi15]

Anyone??????????????????????????? Can Someone Help With My Question?????????????????????????????????????

[97civichx]

Originally Posted by funkdaflex1

driving under 2.5 rpm is totally dogging it real bad cruising rpms is 3 grand.

first of all the rpms that you cruise at varies with different cars. my car is designed to cruise well at about 2K rpms without bogging and i have a civic HX.
second of all I know it isnt an EX, HX, Dx because the Dx is non-vtec, the HX is vtec-e (i have this in my car and the car comes stock will alloy wheels) the EX is a stage 2 vtec. so there are different kinds of vtec, at least 2 kinds in the US. you might have the same engine as the cx or vx models but i'm not really sure. i believe they are 1.5 L but i dont think they have any vtec.
chances are that you have a car with an engine that isnt offered for sale in the US.

[civiclsi15]

First of All my car has VTEC due to the fact the badge is stuck to the back from stock. Second the engine code is like the EX(D16Z6) but instead its a D15 not D16 just 100cc less. Also i can feel the vtec kick in about 4.8-5k and at 2.5k or below the economic green light lights up indicating the car in in econo mode, thus this proves that it had vtec-e (for low rpm )but also it seems to have vtec(for higher rpm). Today i just ordered my AEM V2 and i asked the guy who was selling it and he said that my car was an EX mini me, but no one has still provided me with enough infomation to confirm this. i am its like my car has the EX engine Z6 part and then just stuck a VTEC E D15 part!!! damn it i ust want to know which isss my car!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

[B16CrX89]

i'd say thats a ex but civic hatches dont make ex they only have dx, vx and cx so did u buy ur car brand new or off of someone else? cuz u might have a motor swap in ur hatch just maybe i dunno.

[97civichx]

just because it has a certain badge on it doesnt mean much. i've seen and heard of cars that are badged wrong or purposely badged differently. even if it looks like factory doesnt mean it is. its not too hard to repaint it or put a different badge on. happens all the time.
also i havent heard of cars having a stock vtec light. i've only heard of people adding them on their own.
your car could have a mini me swap. its the only way i could understand a 1.5 L engine having a vtec. my guess would be a 1.5 block with an ex head and then the car being badged as vtec. or it could just be a model not sold where i'm from.

[baskeheurs]

Hello,

First of all: I'm new to this forum.

I came upon this topic through google.

Now for the topic.

What Civiclsi15 says is correct about the vtec-e and the econo light.
also he's correct about the 2500rpm thingy.

Let me explain:

This enginerange=>D15Z6, D15Z8 is known as the economic vtec's

they are 1.5l 16v with vtec.
they have 84kw or 114/115Bhp.

They could be nearly the same as the USDM D15Z (I don't know this for sure as i'm from belgium and i don't have the technical details from the D15Z engine.)

how they work.

the engine only uses 12valves when you are easy on the gas and stay beneath the 2500 rpm zone.
In 2nd,3rd, and 4th gear taht is.
In fifth gear they stay in te 12v mode(=econo=green light in console) until you reach the 120km/h mark.

also the Vtec kicks in @ 3800rpm and the redline is 7000rpm(could be 7100 also)

as far as I know this engine doesn't seem to be available in the US.
only in the EU regions

I hope that this info could be of some help in finding out which car you have.

If anyone of the americans on the forum here could lay his/her hand on some tech. info about the D15Z engine and you can/will send it to me you would have my everlasting thanks.

Because: the D15Z range of our EU models is NON tunable.
I mean there are no known parts for it.

So i'm trying to find as much info about the D15Z range as I can get.
Because I want (like most of us) more power.
(Engine swapping is NOT an option in belgium)

Love y'all

[civiclsi15]

THANKS GOD !!! Someone in the same situation as me!
Well my friend let me say a few facts after i have research the entire Web. NO its not the same as the D15Z from USD. In the US they have
D15Z1,D15Z8 and some other but not the D15Z6, basically this is a hybrid VTEC i think its a two stage vtec similar to 3 stage but not as refined, Also this car is known as Civic EX because i just ordered a AEM V2 from a Honda specialist in UK and they told me that its a EX due to the Z6 part in the engine (i don't know if thats the block or head) and due to the the equipment, the thing is mine was bought custom (e.g no air con, no sunroof,no alloys) so it came cheaper but i spoke to the owner of the car and the car actually came with those things but she didnt won't them. I came across the 2 stage vtec when searching for parts, my car with the same engine code appeared and besides it said VTEC II and then another 1.5 but the D15Z1 had VTEC-E beside it. my conlclusion is that its a 1.5 with EX VTEC and vtec E as well. Also the vtec kicks in at 4.5-4.8 not 3.8. 3.8k is too low for vtec even in a Sohc.

Anyway baskeheurs if you have more info just msg me or post it here!
This Car is very weird and like no1 can find info on it. Also baskeheurs i heard the 0-100km is actually 9.7second not 10.2seconds. Doesn't the car feel fast to be 10.2? i mean for me its feels as its in the 9 ish seconds area wat do u think?

[jcrx]

Civicsi1.5, where are you located? When you say Gibraltar, do mean around Africa? The motor you are describing sounds like one of the off motors we have in Germany that doesn't quite match anything in the states. Anyway the little green light is a shiftlight, you could call it an economy light or whatever, and yes the engine does sing in the higher RPM range, as it is a off shoot of the Z1 in the US VX, but you can't trust model names like Si,EX etc.. since they vary too much between countries. It may very well be the three stage vtec like in the JDM D15B, since that motor is know for it's economy and but is rated at 130ps, and you say it dyno'ed around 124whp which is about right for that motor with a couple mods. So it is probably just a D15B with a regional motor code that doesn't correspond with what is released in the states, or other places.

[civiclsi15]

Hi ,
Yes gibraltar is located to the south of spain, but its a british colony.
The green light is econo mode i have the manual of the Car you know!
But i think you're right about the 3stage stuff. I just want to know why isn't there much info on it? i mean for a 1.5 litre its damn fast! fast than my Mitsubishi Galant 1.8 1993! i just curious because in this topic there are no real answers, just rumor speculation and personal thoughts i just whish i could get the guy who made my car and ask him some damn questions! Also i think its not entirely a proper a 3 stage due to it has only one solonoid unless the first part of the Vtec - e (below 2.5k) is control some other way which i think so! thats why i also said the stage II thing.

[baskeheurs]

Hi there again.

I've done some research also in my books about honda engine's.

They've made the D15Z1,D15Z3 (both VTEC-E) and 90Bhp
then they've made the D15Z6,D15Z8 (both VTEC-E) and 114Bhp

all of these are 3stage VTEC's don't be fooled with the E.
The E only stand's for the 12 valve thing I explained earlier.

And be sure that the 3800 VTEC kick in is correct.
That's defenatly right.

Now what you were saying about the 2stage VTEC is in some way correct.
Honda has mede a block with 2 stage vtec also. with 1493 cc.
but that is an engine only produced in 5-door EU models.

You say that yours is an 3 door so it's surely an 1.5 VTEC-E.
with 3 stage VTEC and so on.

You say faster than 10.2!!
Could be in your case
Because I drive an 5-door civic which is heavier than the 3 door brother.

and even A 3 door 1.5 isn't (verry)fast.
Normally the 1.5 vtec's are economic thingy's like the american HF's.

They also reach their top speed in 4th gear.
So the fifth gear is pure economical.
That's the bad thing about these cars.
The gears are so long that the car loses much of it's "spark" when your flooring it.

I'm trying to find out which gearbox could fit under mine so I have a real 5-speed tranny. (now they are 4gear with an 5thfor saving fuel.)

hope this helped some more.



love y'all
PROUD MEMBER OF HONDA CLUB BELGIUM

[civiclsi15]

the D15Z1,D15Z3 (both VTEC-E) and 90Bhp is only vtec -e
but the D15Z6 is surely VTEC-E and VTEC isn't it?
And 114bhp for a 1.5 is good also i found on Autosport magazine that my car is 0-100km in 9.7seconds, above in this forum you see all the mods i have or being done at the moment well i know a gain with a DC DAC intake and the same supersprint header and exhuast and nology leads, with the same engine code as me and he got 215km/h and he said he could push it a little more probraly 2 0r 3 km more. Yes i have noticed that they have longish gears. And i think mines EU model i think.
And are you sure its a 3 stage vtec? got evidence? articles with reference to D15Z6?

Thans for your help!

[baskeheurs]

evidence of the 3 stage VTEC.

only what my dealer says. but they know their cars well tough.

Also the ones with 2 stage Vtec are called VTEC-II. only made in '97 and '98

They are also 1493cc

difference between the 90 and 115Bhp civic's engine are the compression.

if you want all of the engine tech's about the 1.5 engine I can give them to you but we'll have one problem then.
It'ss all in dutch and it's several pages long.

Gotta run now gotta go to work. (It's 21.15 in belgium now)

PROUD MEMBER OF HONDA CLUB BELGIUM

[insurance_risk]

Hi there civiclsi15 and everyone else..

Im from Scotland in the UK and I own a UK spec 5 Door Hatchback 1.5i Vtec Sport (Year of Manufacture 95-00). Mine is a special edition and was produced only in the year 2000.. It has the D15Z8 and i too have experienced problems understanding and getting parts for my engine.

It has the green light which has the carachteristics (sp) discussed earlier..

Im not that mechanically minded but I would be interested to see any pics of 5 doors and to find out more information on my engine.. what parts have you managed to source etc.. I have found one company able to offer me an Injen induction kit but white dials are a no go.

Graeme

[raceteamx]

Originally Posted by civiclsi15

Nope its not an HX cause no HX has that engine code. Anyone ????? knows? IS THIS A SECRET HYBRID THAT HONDA MADE AND ONLY SOLD IT HERE?? IN GIBRALTAR!!!!!

It just might be.
I havnt heard of rear fog lights here in the states.
That sounds like the standard model. It doesnt have a DX or HX or any code like that stamped on the back. Here its just called the standard model.
The echonomy light is just telling the driving range in which to save gas.
When its on your saving gas.
Im not shure about vtec stages. I heard something like that.
But atleast on the engines we spend our time on here have one Vtec we use.

[civichatch2003]

Hi,
I also have a 1.5lsi, VTEC-E 3dr civic hatch. Can I ask what top speed I should be getting from the D15Z6?? I didn't even know there was supposed to be a kick at 3.8K rpm, I dont get anything noticeable. To me this car seems like it struggles. Is there anything I could do, or is this how the D15Z6 is? It also vibrates while idling.

Also, if the car wants to pull to either side when pulling off, breaking and/or on un-even ground what could be the problem. Turning right @ slow speeds makes the back right bounce?? I have had my tracking done.