Thanks!

 

yes the AFR can correct the problem.... that is the newer better version of their VPC correct? VPC's will also correct this problem but HKS doesnt make it anymore but im sure u can still find some... but that **** is expensive over a g...

 

If you just want the sound, change the intake and induction pipe... That is loud... Induction pipe changes the sound a bit more thatn just an intake...

 

Put it this way, as it is the simplest way I can xpress the VTA thing.

AS long as your car runs the MAF sensor, you will have to dump boost back into the intake to run properly, period. This has been argued FOR OVER 10 YEARS between DSM tuners, some DSM sites ban a guy on the spot for asking such a bad question.

 

The HKS VPC was a device that provided a speed density metering system as a full replacement for the stock MAF system (Karman Vortex sensor in the EVO). As far as I know, you can run a VTA with a VPC because you have basically changed from a MAF based system to a speed density based system.

Although the HKS VPC has been discontinued, I don't believe the AFR is a replacement, but is just a fuel management piggy-back like an SAFC still reliant on the stock MAF sensor.

You are right, the VPC was an expensive jewel eh??

N10S

 

well pardon my newbieness for asking such a "stupid question" this is my first turbo car and i know what i want to do to it and i am also trying to learn how things work.

 

A good recirc BOV, such as a Forge MS, works fantastic and still sounds nice ... just now loud as hel*. Why the need to run VTA in an Evo 8 anyway? Because it sounds ........ loud & cool? Yea sure but it also causes too many problems and requires one to buy more crap to fix these problems. Doesn't make much sense ............ just to satisfy an urge caused by 'a will to be noticed,' or should I say .... low self esteem.

 

Never said "Stupid question" I said bad, sorry either way.

 

No, no low self esteem here. I am pretty sure I am better looking than yourself. I also am sure that I make more money per month than you do in 6. So, Self esteem isn't an issue.

You probably shouldn't be such a dick to people who do have such personal problems. Your not helping at all.

I personally like the sound. No different than a person whos stereo system has alot of BASS. So, let me guess they only want alot of bass because of low self esteem? They to only want some attention?

 

no low self esteem problem here, i just have a prefernce for the high pitched sound wether its loud or not. as for problems cause i am not to sure of that. If the only problem the car will have is running rich between shifts then i can live with that. if its more serious then i would obviously consider another choice. Because its not your prefrence that's fine by me, but on the same token i wouldn't call you stupid or say that you have other problems because i dont like your style. Maybe its just because i am more mature then you or i was brought up right and was told to respect everybody's differences. Dunno

PD

 

I have read posts on this board from folks that have had bad experiences running a VTA on the EVO. Perhaps someone with one installed could chime in. My feedback has been book fact regarding VTA BOV on a MAF equipped car, but to be fair I have not had a VTA on my car so I can't tell you exactly how it performs (or doesn't!).

I can tell you that even though the same logic applies to the WRX, I did run a Forge VTA on my stage 3 WRX and never really had any fueling issues to speak of. I actually wasn't a big fan of the VTA squeeling pressure release sound, but I did a number of acceleration tests with the stocker and the Forge VTA BOV and found that the stocker caused the car to want to fall on its face a little resulting in consistently slower 0-60 runs. The VTA seemed to allow quicker re-spool between gears and just felt snappier.

I need to qualify the fact that I was also running a bigger turbo, Samco inlet hose, bigger TMIC, up-pipe, and full 3" turbo-back exhaust. These mods seemed to work well with the VTA, even though it was still a MAF based system.The EVO's Karman Vortex air flow sensor is supposedly a little more tempermental than the WRX's MAF though.

So the bottom line is, you know why you probably shouldn't use a VTA on a MAF car, especially one with a Karman Vortex air flow sensor. That doesn't necessarily mean that you will personally have a bad experience if you opt to go that route regardless.

Hopefully some helpful EVO owners that are running VTA BOV's will either confirm or deny any major performance or drivability issues. This would go a long way towards helping you make your final choice.

Good luck with your decision.

N10S

 

thanks for all of that info, it helps. I'm also curious if it will cause a sel or not.

 

Try reposting this question in the International forum.

 

I tried it... cheapest way to test it, too. i just spun the existing recirculating valve to vent out and plugged the intake line. being the stock valve, the sound was slight, but still there. as far as performance, if traveling at slow speeds, like first gear, and you abruptly lift off throttle, then the revs drop quickly, rich condition, it has only stalled twice. if you blip the throttle before revs drop below 1000, then it steadies as normal. no noticeable gain in power delivery. and again, remember it's the stock valve.

 

Because I'm good enough, I'm smart enough, and gosh-darn-it people like me! OK Stewert

So to you .... good looks and deep pockets = high self esteem? I make pretty good money but I wouldn't go around bragging about it .... o and I could care less about how good u look ... sorry dude but I'm heterosexual.