Apexi Ecv

[Pulp]

Hi ppl!

I have seen these advertised around the place but I can't find enough info on them about if they actually work as well as they say they do.

The reason I want one is that with the HKS exhaust setup I have, I get alot of droaning within the cabin at low speeds, say between 50-70kms. I've had exhaust places check the setup and say that there is basically nothing wrong and nothing that can be done for it. The fact that it is auto doesn't help and I think makes it alot louder (bloody autos!)

So the next thing I was thinking was to go with this Apexi ECV, which can be adjusted incabin to be half closed or fully open, so that when driving round normally you can adjust it to be quieter, hopefully reducing the droan levels, and open it up when you want to go flat out.

So if anyone knows of these things and how they work with Skylines or 3" type exhaust systems pretty please let me know!

[GODTHRILA]

Looking at it for the 1st time, it looks like all it does is restrict the exhaust flow and (in theory) make it quieter??? Why restrict the flow??? more flow=more pwr.

Being something from Apexi it's probably got a decent pricetag attached and theres probably quite a bit of effort involved in installing it, plus then the on going manual opening and closing the restrictor.

Why dont you just try spraying the under body with sound deadener, and adding some more effective sound deadining material inplace of the original stuff under the moulded carpet (dynamat)? Probably cheaper, easier and just as effective but you retain the POWER!!!

My last car was really droany in 5th at 80km (the speed and gear i was using most often... jst my luck!)

I sound deadened the wheel well and rear 1/4 pannels... made all the difference i needed without sacrificing any power!

thats my 2cents and then sum!!!

[KeeFy]

I was lookin into this sometime back and a friend had it on his evo with a full exhaust. No cat, no resonator, with a cannon muffler. I noticed the results were substatial. Also, due to ur car being so free flow, a some part of ur low end torque is sacrificed too. So for normal day to day driving, this thing does help, i felt a difference in the torque for normal driving ( or it might be my mind playing tricks on me ). There is still some groan and moans ... but it probably cut the sound by about 60%. It's like putting the screw on air restrictor on ur car at the exhaust tip, somewhere around that lvl, but not as effective. Price wise, as Godthrilla said, it ain't cheap. The valve itself if my memory dosn't fail me costs about $300aud, and the electronic addon another $300 plus.

My friend DIY-ed one for his rex, and for his, it was bloody substantial. The problem is, he dosn't wanna tell me how it's done as he intends to sell it.. for about a grand aud. It's like comaring a rex with a straight through and one that's stock standard. Fuggin substantial.

Personally, ur best bet is to get a resonator tuned for the rpm range u cruise in. Normally it's about 2k to 3k rpm? After which it's a screamer, but of course it restricts the airflow.

[Pulp]

Thanks GODTHRILA, yeah they are about the $300 mark.

I don't know if you'd really loose that much power though, obviously when it's shut you would, but fully open there would be sufficient flow?

Hmm I may have to look into this sound deadener stuff!

Cheers again!

[Pulp]

Personally, ur best bet is to get a resonator tuned for the rpm range u cruise in. Normally it's about 2k to 3k rpm? After which it's a screamer, but of course it restricts the airflow.

Hey KeeFy, yeah there is a resonator in there already, do you think replacing this with one that is tuned would be a good idea?

[KeeFy]

Hey KeeFy, yeah there is a resonator in there already, do you think replacing this with one that is tuned would be a good idea?

There's a resonator? Then by right it shouldn't be all that bad.. i think. On that note, i frankly speakin have no idea what to do for your case, cause from what i know resonators and such help reduce the sound. Attached is a exhaust theory website that might be of some use.

http://www.nsxprime.com/FAQ/Miscellaneous/exhausttheory.htm

Maybe we should compare our exhausts one day, i've got no resonator... and it's irritating the hell out of me on long drives, i still have yet to find the $$ to do something about it. LoL

P/s:HKS does make a silent exhaust with performance.. so maybe that could be a possible contender too?

[Pulp]

Yeah it does have a resonator

Although it puts out a nice tone, specially when ya put the foot down, but it's just the normal driving that anoys the crap out of me.

I think I may have to look at getting another system!

Thing is I have a mate (really I do) who has the exact same exhaust, but his car is manual and he doesn't have the same droaning problem!??

So who wants to buy my exhaust??

[Tofu]

if you lick my gooch.

[MMM]

dont be weak man... 3inch straight threw no mufs no cats !!!!!! DO IT!!!

[mitchy_]

only 3 inch?

does your system have a 'complete' cat, dave?

i know having a cat that is temporarily vacant can cause a bit of a drone.

[ossie_21]

My exhaust is unusually quiet, most cars are louder than mine. I love it that way, because you can hear the turvo spool up a lot more and it's nice & loud

Dave I can understand why you don't want the drone because like me you probably hate it, but with the less flow less power thing, obviously if your doing 50-70 you don't need power??

[ossie_21]

Turvo's are much better than turbo's in case you were wondering.

[alpinestars]

turbo back 3inch straight through ftw and a rich tune pop pop!

[Pulp]

Yeah it's 3", someone did tell me it looked like 3.5" though! it has a high flow CAT, but it still had a loud drone before I changed it anyway.

Been reading Keefy's link to that exhaust theory website, not bad info, will look into a few things I think.

Thanks ppl!

[tuyen]

i have an 80mm (3") apeix evc installed. it requires u to drill a hole at ur rear seat foot rest.

it works well when accellerating and cruising at 60-100kmh.

takes out alot of the drone.. and the flap is located just after the cat

tuyen

[Pulp]

Oh man thanks! just what I need to hear mate!

When you say rear seat foot rest, is that behind the drivers seat?

So do you find it lost much or any power?

[tuyen]

yeh behind drivers seat.. the cable runs from there all way just below the driver front seat for easy access.

hrmm.. there is loss of power definately.. but its nothing unbearable. still fine to drive with it all day and it really helps when u got headache on way home from work or if u see some cops close by

ill try take some pics soon show u how its fitted on my hr31

tuyen

[rs73]

hm, the catalyst is on the passenger side and you ran the cable over to the other side (driver's). does it comes with all mounting point so it doesn't accidentally get snagged by the spinning drive shaft?

[Pulp]

Good point rs73!

Yeah tuyen pics would be great hey!

[tuyen]

http://www.skylinesaustralia.com/forums/in...howtopic=132583

theres one for sale there quite cheap.. id snap it up asap if u want it and got 3"