Correct D15Z1 leanburn info

[greasemonkee]

Originally Posted by slownugly

crankcase evacuation?

And we have a winner!



Note the 3" exhaust pipe....

[greasemonkee]

It really pains me to look at these old pics. Losing 300 hp hurts.
http://i12.photobucket.com/albums/a2...psa6305fab.jpg




VxonFumes, I'll see what I've got in the way of iacv's, however there's no way to tell what they go to. What I do know is the obd2 iacv's had a longer bolt pattern. I believe these may have been revised internally to allow more airflow. Again, to my knowledge, all odb1 iacv's were the same on the D's - could be wrong, but I've yet to come upon an issue with interchanging them. I'll pm you if I find something.

Ahhh, yes, a slowly decaying economy as the powers-that-be slowly choke the breath out of it's victim - the python preparing for the feast. I am a certified aircraft mechanic... that never was. No offense taken at all on the inquiry. These days a man must be talented over the broad spectrum.

Without previous tuning experience I would have feared the fuel controller, these range in price according to what you want. One of the older apexi units would have worked for my app. Keep in mind that I was driving 1500 miles a week to justify the fiat currency spent on these gizmos - unless you anticipate fuel prices getting out of hand. A 600 mile range is nice though, for a non-basjoosed chassis.

[slownugly]

Is ur evacuation on the performance engine or the lean burn one? I often thought about doing an evacuation like I did on my gremlin drag car. From the crankcase into the exhaust downstream with an anti backfire valve. Does it make a noticeable difference the way you ran it? I've only ever see crankcase evacuations run into the exhaust

[pgfpro]

Originally Posted by greasemonkee

It really pains me to look at these old pics. Losing 300 hp hurts.
http://i12.photobucket.com/albums/a2...psa6305fab.jpg




VxonFumes, I'll see what I've got in the way of iacv's, however there's no way to tell what they go to. What I do know is the obd2 iacv's had a longer bolt pattern. I believe these may have been revised internally to allow more airflow. Again, to my knowledge, all odb1 iacv's were the same on the D's - could be wrong, but I've yet to come upon an issue with interchanging them. I'll pm you if I find something.

Ahhh, yes, a slowly decaying economy as the powers-that-be slowly choke the breath out of it's victim - the python preparing for the feast. I am a certified aircraft mechanic... that never was. No offense taken at all on the inquiry. These days a man must be talented over the broad spectrum.

Without previous tuning experience I would have feared the fuel controller, these range in price according to what you want. One of the older apexi units would have worked for my app. Keep in mind that I was driving 1500 miles a week to justify the fiat currency spent on these gizmos - unless you anticipate fuel prices getting out of hand. A 600 mile range is nice though, for a non-basjoosed chassis.

greasemonkee

WOW killer post!!!!!

[greasemonkee]

Originally Posted by slownugly

Is ur evacuation on the performance engine or the lean burn one? I often thought about doing an evacuation like I did on my gremlin drag car. From the crankcase into the exhaust downstream with an anti backfire valve. Does it make a noticeable difference the way you ran it? I've only ever see crankcase evacuations run into the exhaust

For forced induction
As the internal combustion engine evolved it was realized that blowby gasses and particulates were corrosive and a fresh air ventilation system must be incorporated, better known as the PCV system today. My contraption may have been overkill but fulfilled the objective - force fresh air in, but the gasses were dumped overboard rather than burned. Better to suck and have negative crankcase pressure, but the pump oil logged; this was the original, double benefit concept.

There is a lot of pressure once you get past a bend or two in the exhaust (from the outlet), a venturi with may have dropped the pressure enough for crankcase gasses, but increasing the post turbine pressure, might defeat the purpose. Seems like I've already experimented with this.

Oil contamination and boost don't work well together. That block was nearing the end of its life. Carrying a bed pan around to catch the oil waste wasn't highly desirable.

[slownugly]

Ohhh ok. I didn't really think about the exhaust pressures with a turbo setup as compared to say a v8 drag car or circle track car where they just headers and collectors. I think the main thing that stopped me from trying it on my lean burn engine was the "pcv valve" from the factory d15z1 wasn't a valve at all. They were gutted intentionally to create that effect of full engine vaccum in the crankcase to make the engine work less. Or so I theorize :/

Who knows maybe its worth a try on a lean burn engine. I like the way you welded the pipe onto the oil baffle. Fantastic lookin welds.

[VxonFumes]

@ slownugly:

the leanburn engine (on the VX anyways) does have a PCV valve, it's just in a funny place. There is a strange canister that plugs right into the block at the back, by the oil filter. From there a tube goes up towards the intake manifold. Down by the canister is what *looks* like a PCV valve but it's not, it's just a connector. But there is a PCV valve right by/in the intake manifold that is an elbow shape, and from there directs piping to the intake where it vents. It's a really strange system...I wonder why it's not "normal." I also wonder why they used a canister below. I have a theory, but it not be worth much. What I wouldn't give to be able to talk to one of the original lead Honda engineers that designed the VX back in the day, and just pick his brain for 2 days straight.

greasemonkee...about the iacv: if you can't be certain it came from a 92-95 model year CX or VX, then I think I want to pass. There is a difference between those two models and the other civics of that time. The fact that the other models also simultaneously had a fast idle valve but the VX/CX didn't is substantive. If you go to Majestic Honda and plug in the right info, you will get the fiche pictures that show it. If you do have one from a CX or VX though, let me know...although I'm running out of time for it. Also, if you or anyone else is interested in a 5 wire 02 censor for the VX used for only one tank of gas, let me know.

Thanks

[slownugly]

Nope that elbow that goes through the intake looks exactly like a pcv but the vxs were open from the factory. No guts in them. The story is people would take their vxs to a mechanic, the mechanic would do the old shake test to the pcv valve not knowing they were empty. It would fail the shake test so they would install a pcv valve that had the guts. This is what I've read on this site. I cleaned the guts out of both my lean burn engines. Maybe someone has a known original to confirm. I have 2 spare z1s laying around I'll have to look when I get to work.

Also I believe all civics this generation had that black oil baffle in the back as well as the pcv going up the intake. Only difference was the open pcv valve.

[VxonFumes]

I was going to upload a fiche picture from Majestic Honda for you, but the biggest .doc file I can upload is 19.5 KB. How useless is that? That's enough for maybe a blank sheet.

Anyways, go to Majestic Honda, punch in Civic, 1992, VX, KL5MT for tranny option, and then choose *breather chamber* for system name/component. A diagram with corresponding part list will show up. Illustration #6 is the elbow, and described there by Honda as "VALVE ASSY., PCV." I don't know who's telling the story you're referring to, but it's not correct. My own civic had a PCV valve in it as well, and pretty sure it was original by the condition. Besides, wouldn't make any sense to not have a valve: you don't want those gasses going back into the crankcase. Anyways, Majestic Honda is a great site.

Not sure what you refer to when you say "black oil baffle." If it's the black canister type box the PCV tubing comes out of (Illustration #1) it's the "CHAMBER SET, BREATHER." Not to be filled with oil, presumably. Would get in the way of the breathing part. Hope this helps.

[slownugly]

http://ecomodder.com/forum/showthrea...v-info-18.html