So coming in 2015 Im looking to rebuild my Evo 8 RS. The car currently has 123K miles on the original motor. Nothing has been done except that it is converted for E-85. My horsepower goal is 500whp-550Whp on E-85. Yes I am on a budget , but if I need to then i will postpone the rebuild to save the funds. I really want to go with the BR 2.1 Rebuild kit but it is 3,000$ and is going to take me roughly 6 months to save for alone. Granted the car is my daily so i dont want it down for that long. My question is to hit my HP goal will I save money going with the BR kit or should I just rebuild the motor to OEM specs IE (Rings, Main bearings, Rod bearings,Waterpump.... etc). Will the stock motor be able to handle my goal? is that a good decision ? Is there any other rebuild kits that im over looking that will be a good canidate?? Im fairly new to Evo's so any feedback will be appreciated, im at a standstill guys THANK YOU !!! FTW
-DOM

 

better spend the extra if your shooting for 550hp+

 

I found the Manley rebuilt kit for 1700$, i think im going to go with that instead of the BR kit. Ive heard good things about manley so i think its a safe bet.

 

Buy wiseco HD pistons (or similar, as long as it use an FSR design). Resuse the stock crank if you're keeping it a 2.0L. Use good rods (R&R, carillo, oliver, etc), don't buy the cheap $300-$400 chinese rods. I also wouldn't buy manley turbo tuffs, they're heavy. GSC S2 cams, GSC 5041 valve springs. and Pick a turbo suited to that power (BBK Full or FP Green would be ideal). 1650cc injectors will be best to keep IDC's reasonable, and you'll most likely need dual walboro 255's, or sinlge walboro 450 to break 500 on E85. Supporting mods obviously needed...

 

Do you know how to build the motor? If not who is going to build the motor?
There is more to building a motor then just throwing piston and rods in. If your not sure what your doing i really think you should buy one from a shop. You will not want to go 2.1l since it is the 4g64 block and you will need to get a core. SO may as well go br2.0l lr motor. Just my .02 cents

 

most reputable machine shops will assemble an engine for $300-$500, and they'll run OEM crank tolerances (which are fine) and they know how to file fit rings, etc. However, with machine work, and assembly costs. A long block from an Evo shop is about the same price..

 

Thanks for clearing the air, ive just been debating on buying a kit or going out and buying individual parts. I just want a reliable build that can be driven daily.I dont drive far maybe 20miles there and back from work.

 

One option that I have seen others use is to get a 4G69 and build it, you would start right away at 2.4L. You can find them fairly easy and cheaply in junkyards or pull-a-parts. You would be able to build the short block while still driving the Evo so it would help to save on down time. This is the route that I will be taking since mine is a daily driver and I can't afford a lot of down time.

 

I'm currently in the same boat as you (well kinda) but I opted for a 2.4LR build. It'll be my daily as well but I believe it'll make for a great street car. It'll be my first build (it's a hell of a learning experience) and I'm shooting for around the 500's as well. Back on subject, there's a lot of options at your disposal to get you to the 500bhp level though.

As mentioned, you should do a forged bottom end (polished OEM cranks work fine). Definitely opt for I-beams (I'm an oliver fan but turbo tuffs are proven) wiseco makes a great piston/s (1400HDs/ HD2's) However, I went with Manley Platinums. I'd look into either a Walbro 450 or a double pumper. If you already have a Walbro 255 then you could run an in-line pump (bosche 044/etc). You'll need bigger injectors (depending on the size you have now running e85) and a turbo upgrade. E85 will get you there a lot easier but most importantly, you'll need a quality tune.