We are talking about venting metered air to atmosphere. One could care less if it holds boost. Venting metered air to atmosphere is for ricers. You should not have to tune your fuel curve to offset your compressor bypass valve.

Your track times and MPH will suffer from venting your bov, period.

Dual vent= all show and sound.

 

So, i guess i'm a ricer dyno tuner then......LMAO...what ignorance.

That statement right there proves your experience in tuning anything other than a EVO.

You see, if your BOV is not leaking under boost.....it does not effect AFRs in boost. Sorry TTP.

You will not have to tune the fuel curve to offset a VTA BOV @ WOT ....that is just not true.

If your BOV is not leaking boost @ WOT, then what makes you think metered air is getting out of the system @ WOT?? What the MAF sensor is metering for is going into the engine.....nothing less, nothing more. It's not until the throttle plate closes(from lifting the throttle) and the BOV opens and vents this metered air to atmosphere....thats when you have a rich condition...only between gears and with part throttle boosting after you lift the throttle.

Again, people that care to learn.....@ WOT the BOV should NEVER be open...therefore there is no boost leaking out of the system to cause a rich condition. this is a FACT....not a theory. You can run VTA or recirc and your WOT, in boost AFRs will remain the same....as long as your BOV is not leaking under boost. If it is leaking in boost VTA, yes it will cause a rich condition. But like i said earlier....if it is leaking @ WOT.....it's not a good BOV and you should not be using it anyway...... no matter if your VTA or recirc.


CJ

 

Yes
No one stated it did.

Who are you talking to? It seems you are arguing with yourself.

The air is still metered when it recircs into the intake.

I am having a hard time arguing with ignorance.

Thanks for the info, but it belongs in the newbie section for users with 50 posts or less.

 

What does this mean, then???






It's called reiterating my points, which are FACTS.

I'm obviously talking about VTA AFRs @ WOT, not recirc....lol
It's obvious that you did not even bother to look at my reiterations....

The ignorance is all on your high and mighty side of the table. On this board...i'm sure you don't get too many people that know better and are willing to stand up to a vendor that gives bogus information.....i know more and am willing to set the record strait. if thats ignorance, than so be it....lol Sounds like you are having a hard time arguing with someone that knows better.



Actually.....you stated VTA effected fuel curves.....and i proved you wrong.

You need to rethink how you act on here.....you are making yourself look like a fool. Typical vendor mentality. I stated only facts....not theories. I will continue to do so....whenever someone posts garbage. We were doing just fine in this thread until you came along, Mr. High and Mighty......who knows everything and can't stant to be proven wrong. Take it somewhere else man.

So tell me, how does a VTA BOV effect WOT fuel curves? TTP? Anyone?

I rest my case.

And to think you are questioning my credentials??? LMAO



CJ

 

Show me where I ever mentioned WOT fuel curves?
https://www.evolutionm.net/forums/sh...9&postcount=16

You obviously have very little drag experience. I have never seen you at any of the IHRA/NHRA/Sony Xplod sport compact events. On the other hand I have raced beside Dwight and Stage 6 CRX in the FINALS of sport rwd events. Have also raced against the Maxworx 9 sec 240sx.



VTA slows the car down and THE FUEL CURVE HAS TO BE MODIFIED TO LEAN THE SHIFT POINTS. Even then it is not worth it to even vent any % of the bov.

YOU DON'T VENT TO ATMOSPHERE ANY KARMAN VORTEX MAF EQUIPPED CAR EVER.

VTA is for speed density where the car is mapped on manifold absolute pressure, and not airflow through the maf that is being ejected from the engineered to be "closed" system.

Your ignorant posts belong at Honda-Tech.com where you came from.

 

You're a walking contridiction TTP......it's becoming quite a joke.

You could not be further from the truth. first off, you said it would not effect your fuel curves, only to state that it would....

I'm telling you right now....it will not effect your WOT fuel curves.

The time it takes for you to switch gears, your AFR goes slightly rich. How rich depends on several factors, but usually no richer than 12.5:1, then goes right back to your target AFR as soon as your back on the throttle. This condition is not enough to cause you to slow down at all. We are talking miliseconds of a slight rich condition. It's happening at a time where your engine is not even producing power, during injector over-run delay(where the injectros are still running no matter what). we are talking about a AFR that would usually be just a few points leaner.....in between gears., Your making it out to be something that it's not.

I don't need you to explain to me how a Karmen Vortex MAF sensor works, and especially don't need your half-*** explanation of speed/density and how it works. So save your pitiful breath.

I'm a REAL tuner....not a racer...i tune these engines and the drivers put them to use. You can say what you want, but i will own you at every turn you take. Either here, or with regards to Honda's. The name i made for myself was for a reason. I don't need some feux-tuner, never tuned anything but a EVO(which is the simplest engine to tune EVER) to tell me what i know.

I know you just can't stand it! "How dare someone know more than me?" It's because you feel very threatend by me, so you are acting out. And thats ok. Just know where you stand behind me.

Like i told you many times in the past, if you want to question my experience and knowledge, id be more than happy to accept your PM with regards to that topic.

Now, lets keep this on topic. I'm done with you....

CJ

 

that last post was bringing it to a personal level, not an educated argument,
which doesnt make the poster look too professional in the least
i think the vast majority of people on here will agree with TTP about Recirc. apposed to VTA.

 

TTP brought it to a personal level long before this.....

You believe what these people tell you, because you don't know any better. The fact is, what he's saying....is not true. I know better, and refuse to allow someone to say false things.

I have proven myself time and time again to know what i'm talking about. I have more than enough experience to hang with the best on these boards, even though they are very few and far between. Most of which are not vendors....I don't comment on things i know nothing about. TTP obviously feels threatend by me.....so he feels like he needs to talk down to me, just like AL does....which pisses me off, rightfully so.

Again, FACT: a VTA BOV that is NOT leaking boost will not effect WOT fueling...... END OF STORY! There is no argument!! If you people don't agree with this, you don't understand how this works.....Go do some reading......

CJ

 

You are still very confused. I never mentioned WOT tuning. VTA needs to be compensated for in your tuning, period.

It is not about leaking bov's. You missed the point.

Second point is that I don't know who you are, neither does anyone else in the Evo world. The notion that we feel threatened by someone no one knows is amusing.

 

lol.........

You don't know me, because you havent been where i have been..... That is what's amusing and proves why you have never tuned anything but a EVO, which has obviously hendered your tuning experience. Do some research and i'm sure you can figure it out.

I think it's funny you speak for everybody else, as well. Again, you're thinking you have it all figured out and everybody else is an idiot(if TTP has never heard of me, then neither has anybody else!! lol). It's time for a reality check TTP. I'll be waiting.

CJ

 

I just put this on my car and it is great! Finally holds boost so well one of my IC pipes blew off.
I tested it with a homemade tester, and it held over 40psi steady for > 5 mins.
As far as the VTA part of it, honestly, the amount that actually escapes is minimal.
The piston has to open almost completely to the recirc port before the VTA port starts to get revealed.
And for partial throttle let-off, the piston travel limits to 100% recirc.

 

I have a aps i had no problems with mine. It held 23psi

 

ttp ran 9s with his evo.... i think.... going out on a limb here i think ttp knows a thing or 2 about evos and tuning them (itune) he is a well know shop in fl that tunes cars and races them.

 

Its 10.9s @ 130 on stock turbo, but thanks.

 

Some people just dont know when to shut up. Why should anybody give you the time of the day when you act like your knowledge is so superior to everybody. You have not built a name up for yourself and so far have shown no proof of your so called tuning abilities or accomplishments. TTP has...case closed. Go back to working on your hondas.