I've found that the subjective performance increase after adding the REVi was significantly greater than what was gained after adding the RB catback. I don't think its a placebo thing, because I should have got more of a "it sounds faster so it must BE faster" feeling from the exhaust...both pieces increased volume, but the exhaust (IMO) was more noticeable as a sound mod. However, I'm having a hard time reconciling this with RB's claimed average +1.9 hp or whatever it was.

jds

 

I am getting a custom exhaust made, purely for the sound of it, and I dont want to spend 600 bucks on a sound mod. It never really adds much power. IMO the stock exhaust has no personality.

 

bureau13 --
Your conclusion is the same as mine. Smoother idle too.

Perplexing. Guess this proves RB is being too conservative with their numbers? I have no other explanation.....

 

This:
seems to directly contradict this:
yet they're both in the same sentence.
________
VAPORIZER WHOLESALER

 

I think he is doing it himself because it won't cost $600 that way. I personally have a welder. Some pipe, flanges, and a muffler would only cost around $150 or so. It's alot of effort though.

 

Well... He hasn't yet posted a dyno yet, but I suppose you've seen Polak's post where he says that he saw a 7+HP increase from the REVi. I think they installed it right there on the dyno after doing the control run. There is also a post somewhere from RB themselves alluding to dyno numbers that are much higher than +2HP, but they don't say much more than that.

I'd be willing to bet dollars-to-donuts on more than +2HP just from my own experiences.

Some on the forum have speculated that perhaps the +2HP that RB claims publically is the residual after the ECU learns the new intake and compensates for the new flow. I believe Canzoomer has a switch on his battery just to erase the ECU's learned behavior and take back his full gains from the piggyback.

-MD

 

I've been wondering about this.....I've had the intake on for a few weeks now and it's not as smooth or "punchy" as it was when I first installed it. The idle isn't as rough as it was before but it's gotten back to that odd, occasional "rumble" which I can feel in the shifter again. I was thinking the ECU must be "learning" about the increased flow of the REVi and "compensating" for it to get it back to the compromised performance it had before. I'm starting to realize the ECU must be the biggest obstacle to performance gains. I REALLY hope RB comes out with a good ECU programming upgrade to fix the strangled compromises we've gotten from Mazda. I realize they had to make some on short notice to meet emission requirements, but it's been 2 years; Mazda should have gotten this figured out by now and fixed the ECU maps. If Mazda engineers can't figure it out, contact RB...they can.

 

Do you have a CANscan or someone with one around you? I'd like to see what the Long Term Fuel Trim is at after driving with the REVi a week or two...

 

LTFT can be viewed w the WDS or any other scan tool w/ CAN capabilities but you would have to know the previous trims to see what's really going on. If the trims were really out of whack or different by too large a percentage, a code would be set. Don't expect to see much.

 

A door bell never sounded so good until 30 mins ago when I opened the door to accept the delivery of my REVi. I have been following this thread closely and after reading through the instructions I have one question that I did not notice anyone ask.

Has the filter been pre-oiled at RB or do I need to take the filter out and do that?

 

Sort of. I am not doing it myslef, and it will not cost 600 bucks. It does gain a little in HP, but I am doing it mostly for character.

 

It SAYS its pre-oiled, but its not that reddish pink stuff K&N sells...it seems to be tinged blue, and there's not much oil. Maybe I put too much on the K&Ns on my previous car...

jds

 

I was notorious for doing this...

So no additional oil need on the Revi, huh? That's GREAT news!

 

It does?! I read the instructions front to back and didn't see anything, looks like I should read them again , lol.

Thanks Bureau!

 

Ditto...I had a K&N FilterCharger on my previous vehicle ('99 SVT Contour) and had to periodically clean the MAF sensor wire with electronic parts cleaner (no residue) due to the oil being shed by the air filter. Contamination resulted in surging as the RPM's dropped to idle .

Regards, Art

 

how hard is it to install the intake yourself

 

It is not hard, most of us did it ourself, I did the install by myself. Read through the thread, there are a lot of good pointers on things to do, tools you need, and the tricky parts of the install.

 

I didn't see it at first either.

 

Reply Brillo and I did mine. It is definately easier if you have someone to help you with the bumper removal.

 

Not hard at all....the critical part of the process was/is removing the wiring harness of the fog lights if you have them on your car. Best way to do it from my own experience was to remove the bumper slightly so you can get your hand and arm in behind the fog lights, then squeeze the widest part of the back of the harness so the clips lift up and you can pull the harness plug off the back of the lights. The clips are levered so if you squeeze the back of them the front lifts up allowing you to pull the plug off. Just remember to reinstall them after you're done before you fully replace the bumper.

The bumper is surprisingly light so it wasn't hard at all to remove it or replace it.

 

thanks for the info mine gets here tomorrow

 

Mine gets here Friday. Now I need to sell my Green filter

 

installed the revi tonight 2 hours went better than i thought thanks for all the help guys

 

its sounds very sweet :D