Yes, I did forget about that 300 extra pounds. So I would agree, probably going to take 340'ish to the wheels to put one into the 11's.

Something else. I have been looking the car over pretty good and without "ruining" it there isn't a lot of extra crap to pull off of it. The EVO 8-9's had some easy weight to take out. This one isn't so easy.

We did lose quite a bit of weight with the exhaust. I will get that stuff up next week. The stock stuff is HEAVY.

Something else. After looking at the factory downpipe I will not be building a downpipe for the car. The restriction is not in the downpipe as it is a really nice short mandrel bent piece. The restriction definetely is in the 02 housing, it's horrible. That is one of our next projects..........after the FMIC.

 

Nice work Dave!! I can't wait till winter breaks then ill go buy my X and some parts lol

 

couldnt a 1 piece 02 housing + downpipe be created since its so much shorter than the 8-9's were? i havnt poked around under a X yet, so im speaking from my ***..... it was just a thought

 

JESUS all those parts were made with gorgeousness and gorgeosity combined...and they work! i LOVE the "eff what the others are doing...do you know who the eff i am?" philosophy too. not many people are justified in such badassery. obviously david and company are a rare exception.

 

Sound about right.

 

vipers, what you are talking about is what we have in mind actually. I don't want to get too far into it until we complete the project. While I'm not interested in what everyone else is doing I can't say the same thing goes both ways.......

 

Beautiful looking exhaust system, David. I have two questions, though. First, how is your mbc set up? Is it used in conjuction with the stock twin solenoid setup, or has it bypassed it alltogether? The main reason that I ask is because you are holding better boost towards redline than the other companies have been able to; 18-19 at redline for your setup vs 16-17 for the other guys'. Second, since you had mentioned that the 9 makes more torque, every other company is seeing a more proportional increase in torque with hp, whereas your setup gains great hp, but not quite as much torque. The only real difference between AMS' setup and yours is the intake piping and maf are stock on your setup, and their's, along with TT's, uses a full replacement of the piping that leads all the way to the turbo, as well as the maf housing. Could this have something to do with it you think, and if not, what could it be? Please don't take this as me saying that their setup is better by any means, as I greatly admire your work, and have great respect for all of the listed companies. I am just trying to understand the differences between everyone's results and what is causing these differences. Now I know that dyno dynamics and mustangs read much lower than dyno jets, so I am not looking at peak numbers but rather comparing the numerical gains and overall powerband characteristics. In this case, my question again is more in the proportional relationship of the hp vs torque gains, and why they seem to be so diferent from AMS' results. Thanks for your time, and keep up the great work.

 

Dave,

First off, VERY NICE gains! I am so excited to see what my 10 is going to do after RRE fabs up the parts.

Question.... since the Test Pipe is so long, and the position of the O2 sensor is so far back, do you think it would make a difference if you moved the O2 sensor closer to the Down Pipe? I know that might not make any difference at all, but it's well worth a try, especially if it will keep the CEL off... splice some wires and reposition the bung...

Any how, congrats.

-Chris

 

sti2evox,

Thank you for the compliments and questions. I completely bypassed the stock boost selonoids, same way we do it on the EVO8-9's. Not sure how the others did it, I'd assume the same way though. We do use our BR inline controller which has shown to have equal to or least taper of any MBC we've tested.

I didn't look at the torque increases everyone else is getting. I will have to take a look. One thing I noticed in some of the other testing was atleast two companies are testing on race gas and have bypassed the fuel cut allowing more boost. Nothing wrong with either but both would greatly increase the torque output. The boost obviously does, the race gas allows the timing to stay up higher too.

The MAF pipe I also feel could increase the power. If the car sees less air coming through it is going to run lower load cells in the map, this could make the car run leaner (more power) and also the lower load cells have higher timing numbers (more power again). I, of course cannot be certain that is what is happening but know that is how it has worked in the past.

I am running a fairly poor mixture of fuel and I am not exceeding the factory boost levels by more than 1 psi. The most boost I have scene is 24 psi and the car fuel cut.

I'll take some time and do some reading about the other companies progress tonight.

Also found out that the software that is coming to tune the car with will allow us to get rid of the CEL from the offroad pipe. Perfect.

 

David, I'm in no rush. Whevever you guys are ready to start production is totally fine.

 

David, thanks for your detailed and informative response. I can't wait to see the other parts that you guys come up with. As somone mentioned earlier, I too have wondered if anyone would make a 1 piece o2 housing/downpipe combo, and from what you said earlier, it looks like that's exactly what you guys have in mind. This should be awesome, especially if the stock 02 housing is as restricive as you are guessing it is. I can't wait to see the results. From the looks of things so far, your attention to detail is admirable and something that's going to make many other companies second guess their designs. Keep up the great work and keep us posted. Oh and if you can find the time, could you put up a video of the car from the outside so we can hear how the exhaust sounds when the car is being taken up to redline? Thanks again.

 

I don't have sounds clips behind the car going up to redline, I'd have to take one on the dyno or something to do that.

 

How many o2 sensors does this thing have? I see one in the DP, one in the test pipe, and another in the cat-back? Or is that a wideband in the cat-back?

And very nice test pipe, looks simple just like all the other generations.

 

The car has two 02 sensors. The third one in the catback pipe I installed just for use on the dyno so I can get a perfect reading of the AFR's.

The stock cat has two bends in it and I was going to make the offroad pipe that way too but once I took some measurements making it straight was the only thing that made sense to me, it's a perfect fit with tons of clearance. We can fit another cat in there or a muffler/resonator if needed.

 

Looking and sounding good Dave, I cannot wait to hear a loopy idle on a X with your exhaust... It's going to be bad freaking ***!