A little advice needed...

just want to know if following the 3 mod rule you should have a FC when the 3rd mod goes on or you can have the 3rd mod and no FC....so far I have Apexi Intake & DP...I want to add the racing beat CB eahaust but don't know if it is safe to run that setup (Exhaust, DP, Intake) with out a FC.

Currently I am running a 11-9-10 boost pattern.

What do you think?

 

I'm not quite at the same point, but have done a lot of searching on that subject. I found that it should be ok as long as you are running the stock cat.

 

I have the intake, Downpipe, and Hi-flow cat with the stock cat-back. What Chris at Rotary Performance told me was that as long as you have the stock cat or cat-back, it will restrict exhaust flow enough to be OK without upgrading the ECU.

 

You Guys rock...gonna order the dual tip RacingBeat within the next week or so...this forum freaking rocks

 

[QUOTE]Originally posted by JUSTgotMINE
[B]I'm not quite at the same point, but have done a lot of searching on that subject. I found that it should be ok as long as you are running the stock cat.

What about RB CB and DP? some people advise that is OK.

Thank you in advance

Alex Kuipers

 

what other mods are you planning in the future??? i would go with the fc or a full ems first...better safe then sorry...chances are you won't stop with cb and you will need one in the future anyway....

 

Well, I am at the point where I know i will get the PFC either next or after the RB Catback...but didn't know which order to get them in...since i would have to wait a few months (yes finances are an issue) to get the PFC I figured go ahead and get the CatBack for some enjoyment while I collect the cash for the PFC...but the mods planned are;

CB, or PFC next
MP
Fluiding radiator
Large SMIC
Clutch and flywheel
then go singel sometime next year.

Basically that's it...then you know all the cosmetic stuff last like FM-10s, some side skirtz and fuzzy dice

 

just go ahead and get the fc and get rid of that cat.

 

I ran that setup for a while but in cold weather I kept hitting the fuel cut.

 

You guys should pm Wade about the 3 mod rule. He has done extensive testing on this and will tell you it's hogwash. Personally I ran a dp, intake, cb and a hi flow cat on a STREETPORTED motor at 12psi and had no problems. When I went mid-pipe I also added the upgraded ECU and ran 14 psi.

Andrew

 

yeah, everyone is going to tell you this and so am i ,
every car is different no matter what mods etc. In the end you want to put you car on a real wideband and see what fuel mixture you are seeing. There are many factors including mods, condition of injectors/spark so on and so on. I say forget the 3-mod rule, and if you go to wades website it basically turns into the "don't go over 10psi" rule.

Danny

 

Where's wade's website? :-/

 

Wade's page:

http://www.wvinter.net/~flanham/wlanham/

The best bet is to put on the cat-back if you're going to and go to a dyno and wideband it. I would definitely worry about hitting fuel-cut without some form of boost control, especially on cold days.

BTW, I have a downpipe and RB cat-back and my A/F at WOT above 5000 rpm is below 10:1. My boost levels are similar to yours.

 

I think I will go ahead and do that since I will have the PFC before it gets cold for sure...off to check out Wade's page...

me

 

just wondering... mods: hks hyper exhaust, dual apexi air filter... wiv stock catalytic... but i did take out the honeycomb inside... is dat still good wiv the stock ecu???

 

Ha ha! Good luck ordering the RB dual tip! Mine's been on backorder for the past 7 weeks. I'm getting a little bit pissed... its supposed to get here in the first or second week of sept. That was after they told me it would be on back order for only three weeks. I ordered it from Rotor Motorsports. They had the best price I could find.

 

i have to agree. if i blindly follow the 3 mod rule i think i'd be in big trouble. with just a dp and cb i'm getting boost creep up to 13+ psi so there goes the 3 mod rule.

 

That sounds like you have another issue altogether. Is your wastegate sticking or something? You should not be creeping at all with a stock cat and hitting 13 psi with just a downpipe and cat-back is pretty high.

As far as the back-ordered RB exhausts go, I got mine as part of the group buy -- took 3 MONTHS. So quit whining about waiting a few weeks. j/k

 

yeah, like has already been said, read wade's site for real world data.
I personally ran IC, DP, CB, cold air for about a year, holding boost to 10psi, no problems.

 

not sure..i've search the forum and others have said with similar mods (dp, cb) they've seen 12, 13 psi.

 

Why would you risk it?! I could car less what some guys website says. I've had experience running lean with 3mods and no ecu upgrade. Do yourself and your 7 a favor. Buy the Power Fc, before anymore mods.

 

Is street ported a one of 3 Mod Rule?

 

what are you talking about? you should visit the site before blowing it off. His site has actual wide band readings from cars with specific mods. Where did the 3 mod rule come from? does anyone really know?

even if you don't want to give his site any value, why should someone spend $1000-$1200 for an ECU, when they could rent a wideband for $50-$100 and actually see what their car is doing.

 

Ok, what were your 3 mods, and more importantly, what boost levels were you seeing? Quantify your results, as it seems that boost is the overiding factor. A person could probably mod the hell out of his car, but if he was able to keep the boost down, would probably be ok (just speculation on my part, don't try this based on my assumption). The problem with the 3 mod rule is, as you free up the intake/exhaust, you inevitably create more boost, and more boost without fuel/timing mods is where you run into trouble. Why couldn't you add an I/C, cold air intake (to benifit from a colder air charge) as well as free up your exhaust (short of wide open, where creep is an issue) as long as you keep boost in check. After all, there is some headroom in the stock maps. I know that a denser air charge from the I/C and intake can increase the air density (leaner mixture) but if boost is 10#'s or less you should be ok. Please let me know if I'm way off base here.

Regards,
Frank

 

I agree, I'm surprised by ErnieT's comments with his experience. Wade's data looks solid and my own recent dyno run backs it up. I mean my A/F ratio sloped down till it went off the scale (10:1) at 5000 rpm and didn't even register again until about 7500 rpm (10:1). I will allow for the fact that I appear to have a very small boost leak somewhere as I am only hitting 10.5-11 psi with a downpipe and RB cat-back.

Still, if you can control boost to 10 psi, you can certainly run three bolt-on mods safely on the stock ecu (although I wouldn't consider running a midpipe or a streetport on the stock ecu).