5thgencivic

So I hardly post on here anymore but I need some advice from you peeps I picked up a d15b. What I want to do is eliminate the economy mode. Now technically couldn't I run constant power to the "economy" solenoid? So all 16 valves are working under all conditions? Or are there other ways around it? Thanks for any help.

grumblemarc

iTrader: (4)

Trying to understand. What would be the purpose?

Dontoh

Lemme try to understand this, vtec-e is meant to have more of an economic impact, so while its not in vtec, it saves fuel.. you want to eliminate that and keep it in vtec constantly? it's possibly, except for the fact that vtec needs many things in order to operate. it needs the correct operating temperature, it needs to be going at least 15mph (I think so anyway) and a couple other things. so you might end up going into limp mode or throw cels out the *** if you do this. however, you could just wire your vtec to a switch or chip your ecu but either way, vtec engages at a certain rpm for a reason, so you never know what type of problems could arise

edit: but thats just what i think, i could be completely wrong lol

foo fighters

The vtec head internals are very different between the d15b and d15z1. I seen a thread where someone put d16z6 cam and ALL related head parts in a d15z1 head and it ran. try researching that.

5thgencivic

It won't be in vtec all the time. It has 2 stages. One solenoid is for 12 valve to 16 valve and the other for vtec. The reason I am trying to eliminate it is because I'm going to be running a chipped p28 on it and I'm going to boost it. Thanks guys.

grumblemarc

iTrader: (4)

Don't understand why you would get a VTEC-E engine for the purpose of boosting it-unless you got it dirt cheap.

5thgencivic

that's what happened lol

nicolas1320

well guys i see im not the only one with this engine lol, im taking it out because from 1000 rpms to 6000 apms the engine pick up is super slow, thats y u need the p2j ecu. is the factory ecu for that engine. and dont bother looking for solutions on running the secondary vtec,the guy here already said the best solution,run it on a switch. a honda tuner told me the same thing lol.

djslim23

Is this a 3-stage vtec or just vtec-e?

djslim23

If it's 3-stage, it's doable with a p72 ecu as long as you map it as if it is in 16-valve mode while giving the 1st solenoid constant power. So then it's acting just like a z6/y8 with regular vtec (2nd solenoid) wired and mapped to the butterfly watevers on the p72.

If it's a vtec-e, it would be as easy as using a p2p ecu and running constant power to the solenoid.

I'm not saying either of those is the right way, but it's feasible. I have read that running the constant to the solenoid can be bad for the engine, I forget exactly what it has to do with, but it's worth looking into. You'd probably be better off swapping the head.

aldwin2610

hi d15b vtec engine its original engine for 1999honda civic hatchback thnx

kzelisko

Kinda thinking out loud here, but wouldn't it be possible to run a 3 stage vtec motor with a gsr ecm and use the intake manifold runner control output to control 12-16 valve switchover? Obviously it would have to be tuned and have the vtec switchovers set right for this engine but it seems like something that could work.