Ted B. we won a recent exhaust shootout with our exhaust tested against, I think 12 other systems. Pretty good sign that we are the highest flowing, definetely the lightest weight SS system for the car too.

I highly advise that you do NOT put adjustable cam gears on your EVO. TOO many mishaps over the years with them and for the few HP gain that you MIGHT get with them it is not worth the risk or expense.

Best thing for you to do to your EVO is Full exhaust, air filter kit, boost controller, boost gauge and a matching re-flash to the stock ECU.

There is a dyno thread of some recent testing we did and you'll find that even with an AFC and those above mods that 300+ whp will can be reached.

I also believe if you had a custom reflash done on your ECU at these power levels the power difference between the AEM EMS and the flash will be very low if any different at all.

In the dyno thread that we started we made 316 whp with our Stage 1 kit and just an AFC. I think those power levels will increase with the flash. For now though we plugged in the AEM EMS with the stock MAS and such. With absolutely NO tuning other than a small idle adjustment the car made 309 whp. That's pretty darn good right out of the box with no tuning. The AFC was tuned as far as we could go and the 316 was the max power we could make. I am sure there is 20+ whp in the EVO and some tuning with the EMS over what the AFC could make.

We will be doing a custom flash for the car the 14th, it is going to be interesting to see where we end up with that vs. the EMS.

David Buschur
www.buschurracing.com

 

You might aswell throw a fuel pump to that list just to be safe I have those same mods with the walbro fuel pump and i've got 315WHP with a custom tune on the stock ECU by TT. Thanks for the reply david about the Exhaust competition.

 

With all due respect David, the test consisted of these systems:

5Zigen
Billy Boat
Borla
Buschur Racing-EVO SCCA Legal Catback
DC Sports
Mackin
Gruppe-S
HKS
Magnaflow-Magnaflow Ti
RS-R
Works


Although we don't know the details of the test, your system fared very well, as did the HKS and Magnaflow systems (all within a hp or two of each other). I've not even heard of some of the others, which are apparently obscure.

However, the fact is there are many popular 3" TB systems that were not included in the test. Therefore, to claim that any one system is the 'best flowing' of ALL available systems, is as I stated earlier, conjecture.

 

The details of the test are in the article in the magazine. They bolted them on an EVO, regulated boost levels so they stayed the same between systems and went from there. The only one that made more peak hp than us was the Magnaflow titanium system and that was in HP by under 2 whp, in torque we beat them by a small margin and in midrange we beat them.

That was a test consisting of 11 systems, I would say it is a good guess that what I stated is true.

Don't me bad Ted, just get some of our parts on your car, them you'll be a believer rather than a hater.

David Buschur
www.buschurracing.com

 

I think the Magnaflow Ti did the best, great curve on it too. But the value of David's cat back is undeniable. It had the second best gains at more then half the cost of the Magnaflow Ti! It had some very nice weight savings over the others as well.

This article (TPR #4 or 5 I believe) if anything showed that all exhausts aren't created equal, the curves on some of these were dramatically different. But that isn't to say there weren't issues with dyno'ing, I think they did say that this may be the last Turbo Back comparison they'll ever perform. And as you said, many of the results were not included.

Still, it pretty much went along with what we've always heard on here. The Buschur gets some of the best gains (mostly higher in the power band) and is one of the lightest out there. I think it is arguable that it is flat out the best value out there as well. I'm surprised that more people on on the boards aren't using the Magnaflow Ti, I'd love to hear some reviews on the sound quality, fit and finish, etc.

 

FWIW, I am and have always been a knowledgeable, educated, experienced, discriminating consumer who seeks to cut past voodoo and level the playing field. I am neither a 'lover' nor 'hater', and I buy my parts from no single producer or distributor. On the contrary, I think it's great that you're an independent that spends a good deal of time with the car. Actually, there are a few of your parts that I have slated for my car, but not until I actually need them (i.e. larger IC).

Again, while my personal feelings are that your exhaust system is one of very good merit, neither you nor I nor anyone can rightfully claim that any system for that matter is 'better' than all the others - especially those that were not part of the test. And while I feel that your system is certainly among the best, and a good value where power/$ is concerned, there are other issues which are important to many in making exhaust system purchases, and volume (dB) is one that certainly weighed heavily in my own personal decision making.

Cheers.

 

Ok, so being that I'm looking at doing the same things and just barely starting...I don't have much advice, but what I can say is that when JGTC USA was here, I talked to a lot of vendors and a lot of Evo owners who said that A) yes, cam gears have too many problems to be worth it and B) without a lot of tuning, the cams aren't worth it either....I say do what DB said: Turbo-back, filter kit, boost controller, some sort of boost gauge (might as well get a turbotimer/boost gauge), and a reflash of the ECU...I have also seen that the cars with that are doing around 300whp, there was one here with: dynoflash, intake, turboback (no cat), fuel pump, and MBC doing 272whp on a Mustang Dynojet...I did 207 stock, so, yeah

 

I think the cost per what you get with the Magnaflow Ti is what keeps guys from getting it. The catback alone (the downpipe/offroad pipe no available in Ti) is around $1200. For $1200 you can buy our entire Stage 1 package, almost.

I just went back and looked up the article.

Magnaflow Ti was the highest HP producing with 264.7 @ 6454 rpm and 298 ft lbs at 3813 rpm. The system weighs in at 12 pounds and costs (retail) $1244. The gain in HP was 16.9 whp.

Our system was second, the highest HP stainless steel system though with 263.5 @6438 rpm and 296.7 ft lbs @ 3849 rpm. Our system weighs in at 16.5 pounds and costs (retail) $450. The gain in HP was 15.7 whp.

Using our system on the EVO the gain in HP cost $28.66 per HP gained, using the Magnaflow Ti the HP per dollar was $73.60.

Our system was down by 1.2 whp a the peak and .3 ft lbs of torque at peak.

Something that needs to be noted. The test was controlled, this means the car wasn't allowed to pick up any boost gains, if it did it was re-set so all the systems were tested on HP caused by a flow increase rather than the boost going up.

Recently during our testing here we bolted on just our 2.5" axle back exhaust, cost $260. We gained 15.1 whp. That's only $17.21 per horsepower gained. Adding a full 3" cat back to the EVO gained us right at 22 whp, this is catback only.

Would have been interesting to see what the test would have showed not controlling the boost at all.

David Buschur
www.buschurracing.com

 

Fair enough Ted. Our systems for the EVO have continued to be changed since the first one we built in March of '03 when we got the car. The quality has continued to improve from the TIG welding to the flanges. The slip joints are now only used in two spots which makes adjustment and installation very fast and fool proof. As for noise levels (DB's) our system with the Magnaflow muffler on it is quiet, with a our legal high flow cat on it I don't think you can find a higher HP producing quieter system. It is quiet enough that I can't think anyone performance oriented would think it was even the slight bit loud.

We keep trying even after 16 years of doing the same car.

David Buschur
www.buschurracing.com

 

People have made 350WHP with an EMS and no cams. People with a flash and 272's make about that. EMS does amazing things and controls the Evo far better then the Stock ECU providded you know what you are doing.


EMS + 272's make between 380WHP to 400WHP on a Evo with pump gas, try making that with a flash on pump gas. The EMS allows even more boost to be run and way less restrictive intake as there is no MAF plus a way better control of timming and Knock. It really is that much better. It hasa excelent injector control as well, fuel control is top notch, but it is Pricey, it is the best mod IMHO as there is nothing more important then tuning.

 

An otherwise stock EVO + EMS would have to be run close to the ragged edge to get 350whp (DJ) - if even possible. Assuming it is, it would be more expensive (and less safe) than running a flash + cams.

The MAF is not nearly as restrictive as you imply. There are GT35 equipped cars making 550hp with the factory MAF, which is the same figure for comparably equipped cars with the EMS. This is fact, and it's been demonstrated in recent dyno testing at one reknowned EMS tuner's facility. If your assertion about the MAF being restrictive was true, the difference would be far more evident at 550hp than 350hp.

The factory ECU's knock control algorithm is absolutely much more sophisticated than that of the EMS and other standalones, which tend to be rudimentary and simple by comparison. The reason why this is the case is obvious, so pardon if I don't elaborate further.

The bottom line is that it that power boils down to two things given a fixed boost curve, those being spark and fuel. Whether one is reflashing, using a piggyback, or a standalone, spark and fuel can be dyno tuned all the same. The difference you speak of is simply how close to the edge of destruction one is willing to run it to get a little more power. Not everyone wants to forego certain safeguards to get a few more hp. There are even a few cars running a little over 400whp with the stock turbo and EMS (plus other mods), and I know for a fact that at least one of them can be heard knocking as it goes down the track. You may find this prospect to be acceptable. I don't.

 

erm people, go back to suggestions please not a discussion or an argue, we all have the same MO which is the EVO

Greddy EVO catback any good? if so which downpipe?

 

Suggestions will vary, and if you want to understand which are more viable to you and your needs, then you should pay attention to the discussions.

Nevertheless, I suggest you get HKS 264 cams if you are not going to get adjustable cam gears, and keeping your tuning activities basic, especially considering your relatively simple plans for your new '05 (and keeping its warranty intact), as well as your relatively remote location. The fuel pump is a good investment, and the upper IC pipe/filter kit you are considering is mostly window dressing. Opinions may vary, but there's mine.

 

Hmm why mostly dressing? What about the catback? Let me know, and remote location? :grumble: come on Mitsubishi Motors here in Puerto Rico is my customer thats why Im gonna buy an EVO I get a good price on it too heheh
Anyways check this mods I have checked and asked around.

HKS 272 cams 0 degree
AEM EMS with 3.5 bar MAF sensor
Full Exhaust
Boost Controller
Fuel Pump
BOV Kit (Greddy Type S)
Intake Pipe Kit (AEM)

Let me know

 

Mostly dressing because you should not expect to get much out of it (e.g. <10hp). You shouldn't expect to get anything out of the BOV kit you are considering, or the intake pipe kit as well. These things will however cost you quite a lot, and are unecessary.

A good 3" turboback system is a must. I can't comment on the specific system you mentioned, so I'll leave it to someone who actually has that one.

HKS 272s at "0" is not your best option. The 264s at "0" will fare better.

P.R. is a remote location when you consider the availability of technical expertise that pertains to dyno tuning an EVO with a $2k standalone. Consider that before you jump into it. There are viable alternatives - and they will not void your warranty. Otherwise, P.R. is a beautiful place - been there several times.