d15b2+head d15z6

[bstream]

Hi ALL
I have only head, but new ecu and intake cant buy (I live in very smol town...), but wont use head from d15z6.

I deside .... old_block+head_d15z6+old_ECU+ATMega8515+old_Intake

Q:
1.whot voltage( and current) I need for realise vtec solenoin?
2. if I realise vtec valve, I must know about piston is up = TRUE or FALSE
3. I have one solenoid but 3 stage vtec:shocked: how I must execute signal to valve on fist? second and 3th mode?

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sorry for my english
ATMega8515 - microcontroler Micro chip (www.atmel.com)

[ladyhatch]

you should make,your question a little clearer but you need the intake manifold and must convert to multiport fi {4 injecters} and and you can use a shift light or msd switch for vtec activation you should definitely try to get pr3 b16 computer its obd0 and your car will run alot better also i never heard of 3 stage tec in a single cam maybe dual stage

[mattie_96]

just to clear things up, when you stated d15z6, did you possibly make an error typing and mean the d16z6?

[bstream]

just to clear things up, when you stated d15z6, did you possibly make an error typing and mean the d16z6?

sorry d16z6 is correct

[bstream]

but you need the intake manifold and must convert to multiport fi {4 injecters}

1.I wish to use vtec_head with an old inlet collector (monoinjection)
2.Then already to involve 4 injector, even can with ATMega8515

get pr3 b16 computer its obd0 and your car will run alot better

3. obd0 its to easy. I want make my ecu (expanded)
i never heard of 3 stage tec in a single cam maybe dual stage

!!!AAAAAAAAAAAAAAAAAAAAAAAAAAAA!!! :shock:

[mattie_96]

lol....never heard that before..."monoinjection". Its a polite way of calling it the crappy dual port fuel injection. Lol i hope you are legitamitely a little rusty on the typing as we all are sometimes, and not some bored ppl that made up a user name and are pretending to be a guy from russia.
But disregard if you are legitamitely looking for help with this vtec swap.

You can
1.) use your old d15b2 block
2.) take out the oil jet in the b2 block and put on the d16z6 head
3.) You have to either convert to obd-1 or stay obd-0 but convert to multiport as there wont be enough fuel available when you manual engage vtec by using a vtec controller IF YOU USE DPFI

[bstream]

ok

1. u say "pretending to be a guy from russia" - u can find me on http://www.hondamotor.ru/board (user - bstream) for example http://www.hondamotor.ru/board/index.php?showtopic=43183

2. u say "wont be enough fuel" - It means that even if I can lack of fuel will operate vtec on high turns at me?

[mattie_96]

OK sorry man I just needed some proof thats all, cuz there are lots of stupid people that pretend with fake user names for fun.

ANd about the fuel not being enough, normally when you convert to obd-1 and use the p28 ecu, the particular fuel curve at the specific rpm when vtec engages is just enough to compensate for the extra air that the more aggresive vtec lobe on the camshaft produces resulting in more lift resulting in valve being open longer and more resulting in more air rushing into the combustion chamber in a shorter amount of time.
In short form, it just means that when vtec engages, you need to compensate with a form of increased fuel for the extra air. Normally the ecu does this if you were obd-1 but ur obd-0 non mpfi and the 2 fuel injectors in the dpfi system is almost guaranteed to not be enough as the 4 injectors in mpfi is not even enough to compensate for vtec unless you chip an obd-0 ecu and make the fuel curve more aggressive, or get an adjustable fuel pressure regulator and have it set decently rich which sucks at idle but helps in the long run when vtec is engaged by a manual switch if you have obd-0 or you can chip you pm6 obd-0 mpfi ecu and run a program that enabled the automatic tranny trq converter lockup solenoid or something (some other 1 wire as well) to go to your vtec solenoid and activate vtec that way.

But as it stands now, Im really sorry but you CANNOT have vtec with your dpfi system. Once you convert to obd-0 then the possibility will be there to manually engage vtec, but the ultimate way is obd-1 convertion and having the ecu do all the work.
You can though put the d16z6 cylinder head in place of your d15b2 head, but you will have A VERY VERY VERY LEAN condition in your combustion chamber when vtec is manually engaged. Aside from the gain you'll get from the increased compression ratio of the z6 head on the b2 block, it will actually be slower because when not in vtec(safest mode) and on the regular fuel economy lobe on the camshaft, you will have somewhat of power until 4400 rpm or so, then the low cam REALLY dies off and theres absolutely no point of reving higher, as that 4400 rpm point is usually when it is a good transition for the more aggressive vtec lobe to engage, but if you have dpfi you cant have vtec.

[bstream]

now all clear
I have some problem:
1. fuel not being enough after 4500rpm
2. If I wish to correct pressure of fuel after 4500 that to me more productive fuel pump is necessary and also long adjustment of this pressure is necessary

Today already has buy an inlet collector, now turn for odb1

PS Thanks for the full answer

[mattie_96]

sure no problem, its actually not even at all to do with the fuel pump. As even when people swap in b18c5 or gsr b18c1 engines into ef's (88-91 civics/crx's) they still use the stock fuel pump as I am using the same fuel pump from my 91 civic cx that was running on dualport fuel injection (dpfi) just like yours about a year ago. It has everything to do with the fuel rail and fuel pressure regulator(all mpfi's have 4 fuel injectors and the big silver fuel rail and fuel pressure regulator).

I wish i could honestly go knock on your door and give you a free MPFI intake manifold which i have and would if you lived a little closer, but you will have to try your best to buy one as then you can utilize a stock fuel rail and pressure regulator already on it from the factory. The only thing with the 92-95 si civic's with the d16z6 stock is that rather than having fuel pressure like mpfi si civics from (88-91) at 36-39 psi, they run at 42-45psi i believe. However to answer your question, to get the necessary fuel requirement once vtec kicks in either manually or through the ecu, you either have to
- get a 92-95 si d16z6 stock fuel pressure regulator
and then manually switch vtec ( the decent method but still not perfect)
OR do it 100% perfectly and get the 92-95 si d16z6 stock fuel pressure regulator AND a p28 obd-1 ecu, obd-1 injectors(and the same rubber injector o-rings for those injectors) + fuel rail. THe p28 ecu is the one that has the necessary aggressive fuel maps once vtec kicks in. Ide say personally the p28 ecu with the correct fuel maps(stock) is probably more important if you have to choose ,than getting the different fuel pressure regulator.