i have the gms1 and im gettin a catted downpipe and k&n typhoon intake for my car i was just wondering is this going to throw off the fuel trims that bad? or will it be ok with the two mods? as in will it be runable and not damage the car?

 

I have a hahn catted dp and K&N SRI installed on my car. The only 2 mods I currently have outside of GMS1. Not throwing any codes and the car runs perfectly normal (Except it is very loud on cat warmup now). Fuel trims are a little off, (I'm not getting as good gas mileage as I should); however, we are talking a loss of only 20 miles per tank I think. Not back firing or anything though, and it was driven very hard one day last week when we went to the track. Basic conclusion, it runs fine on both driving hard and very easy; however, I would get it tuned as soon as you can afford to because I'm sure the car wouldn't like it over an extended period of time. I'm hoping to get mine tuned by the end of july.

 

The K&N cone can be rotated to optimize long term fuel trims if you have a way to monitor them. IIRC, the seam at around 12:30 o'clock on the cone was the best for many. I'm sure a K&N Typhooney owner will correct me if I remembered it wrong.

 

what about just the downpipe for now ill get the k&n drop in and wait for when i have enough money to tune for a intake

 

I have no problems with trims on the typhoon and GMS1. I don't however have the downpipe - I'm wondering if the combo may be enough to start seeing anything interesting.

 

I beleive it was anywhere from 10-12 oclock is where the seam should belol.

 

I have a catted DP and the K&N typhoon. when I first got the GMS1 I got a code for "too lean at idle" but my filter was closed to 1:30 than 12 or 12:30 so i rotated it cleared the code and the car drives fine now. no codes, nothing weird.

 

I would not put an intake on the car unless you are going to tune it for it. Its been discussed to death, search if you need to know the reasons why..

 

I think theres a sticky on that lol.

 

Tune that baby

 

Just us silly tuners trying to make dollars again... lol..

 

Damn you

 

ok forget the intake what about just the downpipe?

 

Dp and a real tune are the best 2 mods IMHO for this car. We made 346/424 on a car with DP/Tune and E Blend.

 

what about w/o the E blend?

 

a downpipe can cause a code as well. It is less likely on a catted downpipe.

I been considerikng adding a downpipe on top of GMS1 but I would want a catless and i would probaly through a code. I decided I would mod my other car instead.

 

the zzp catless dp doesnt throw a code alot of people have them . and as for the k&n if you clock it right no need for a tune my ltft are at -.8 . it all in how it rotated . and i wish byt was closer

 

Im under 3hrs away from DE

And I have a ZZP DP as well and it hasn't thrown a CEL ever for it..

 

Eh...whether or not you'll throw a code is hit or miss (though I'd say mroe on the Hit side). My ZZP threw a code...but it was after about 10k miles. Popped up one day cruising home from work. Disabled it via HPT and that was it. My BadMab I'm not sure about. I had disabled the rear O2 the moment I put it on.

 

What code?

The majority of cars ive tuned with a catless DP were ZZP's and I have disabled 0 codes on any of those cars without issue.

 

now if it throws a code and u disable it via tunner will u pass emmisons????

 

yes.

 

if you are running catless, they will just look at your exhaust and fail you lol.

 

w/o e blend and just Intake (hahn at the time) / DP with BYT (and gms1 sensors) you get my numbers which are linked in my sig. That was old HPtune, i have updated tables.

Again, I only have intake (k/n now) and catless dp.

 

It was so long ago I can't remember. One was cat inefficiency and another one about Bank 2 blah blah blah.