I'm a newbie who's searched for this subject but was unable to find it on this board. Hoping someone can point me in the right direction. I have 10K on my stock 03 Evo and want to do some HP mods that won't drastically effect my highway mileage (about 35K/yr) but still give me some nice HP gains. Money's not a huge issue for me so if it costs a little more I'm up for it. I'm assuming starting with the intake and exhaust is the first step, but again I'm on this. Also, anyone in MN know of a decent shop for help on complex installs?

 

Get some sort of a fuel controller to lean out the rich map on the car, will save you gas mileage. A catback is also a nice addition , I rely wouldnt worry about intake till you did the exhaust.

 

Thanks Quickshift. Any suggestions on brands/types? I see you have the Buschar Cat, you likes?

 

https://www.evolutionm.net/forums/sh...ht=closed+loop

No no no no. Read ShapeGSX's post.

 

That's right... only a reflash/standalone that addresses closed loop maps, will effect over all efficiency... Not plugging them at all (I just have personal experience), but the Works reflashes (P1 & P2) have shown time and time again to add power and reduce over all fuel consumption...

Of course your foot will be the final determining factor...

 

well if thats the case get a dynoflash , ive noticed better fuel economy with my s-afc settings. I will be getting flashed as soon as i get the rest of my mods in.

 

Also if you guys would have read his post you would see he is asking for power over fuel econ. Those two simple and cheap mods can free up an easy 30-50 hp at the flywheel. And those mods will not hurt your fuel economy on the highway much at all.

 

Good info boys. Quickshift, you are CORRECT! I don't care about increasing the mileage as much as maintaining what I have. Making some extra Horses is the goal for not just beating, but Smokin every **** with a so-called sportscar (BMWs, Audis, non-turbo Porsches). I already feel sorry for the US V8 boys, the Evo has shriveled up a few already. Anyone install the stage II Buschur system or similar? I'm interested in the HW mileage they would get (assuming it's not at 100mph+).

 

I have the stage 1 setup (buschar s-afc with there tuning map/3in turboback with high flow cat/ Greddy Boost contr/HKS RS intake) It is the same setup they got with different part. I love the way she pulls now it is sweet. I will be be upgrading the intercooler and pipping next along with a upgraded fuel pump if needed. And yes ive spanked a few cars on the HW

 

Sorry, missed that... go Buschur staged set ups then... from the Econo to the stage IV you can't lose.