FLEX FUEL v2.0!!! e_kobz's Evo X GSR 18k, MAP cast mani, bolt-on's
 

Disclaimer: This thread features REAL dyno results. VD fanboi's look elsewhere.

Well it has officially been one year since I converted my daily driven Evo X GSR to flex fuel, it has been the best thing I've done to my Evo X since owning it. About a month ago, I started to notice some strange AFR's on my AEM wideband. The sensor was reading lean at idle, cruise, and while in boost. I started to think it was a fuel issue until I pulled the heat shield off of my stock manifold and I saw the infamous 4B11 cracked manifold. At first I was irritated until I remembered I had a shiny new MAP cast manifold sitting on my shelf that was waiting to be installed. I guess I found my reason :lol: Well sitting right next to the MAP manifold was a shiny new FP MHI-18k :D Figured if I'm going to be pulling the manifold out I mind as well swap the turbo as well. To help with the added boost, I ditched the stock DV for a TiAL QR with a 6psi spring. To ensure the MAF sensor would not get maxed out at 5 volts, I upgraded the stock 2.5" MAF housing to the ETS 3.5" MAF adapter (thanks for recommending this Razorlab). Lastly, I decided to switch the DW300c fuel pump for an Asnu FP330E fuel pump.

Fast forward to this morning. I arrived at UMS Tuning in Mesa, AZ. My good friend and tuner Tony Szirka was there ready to make some jam. We loaded the car up on his Dynapack and he created a base map for the 18k. So everyone is aware, his Dynpack features the most recent software update and it reads within 1% of our local Dynojet. To recap from the last year, when we tuned it on the Flex Fuel rom last year with the stock turbo/manifold/DV, the car made 360/360 on ACN91 at 26psi, 380/380 on E54 at 28psi, and 405/410 on E85 at 30psi.

Since September of last year, a bill passed stating that Arizona would only get E54 ethanol from now on. Seeing that E54 is the best I can get from the pump, this is what I showed up to the dyno session with. Unfortunately I did not have time to update the entire flex map during my dyno session today due to work obligations, so we only focused on E54 which is what the car is running 99% of the time.

Took about 4 pulls to really get the tune dialed in. On the 5th pull, the car made 430whp and 417wtq at 30psi on E54. I was very pleased with the horsepower number, but the torque made me a little nervous since I've heard plenty of horror stories of 4B11 connecting rods bending over the 400wtq level. Boost came on strong and I was hitting full boost, 30psi, at 3750rpm. For longevity purposes, we decided to turn it back a little bit. On the next pull, the car did 430whp and 400wtq. Boost was spiking to 30psi and falling to 27psi by 7500rpm. The car pulls like a freight train, it feels a lot like my Evo IX with the 71hta. The most impressive thing about this turbo/manifold setup is the powerband after 6000rpm. On the stock turbo, 6000-7500rpm was a downward slope on the powerband. The 18k/MAP manifold keeps climbing and making power all the way to 7500rpm. There is roughly a 100whp difference between the stock turbo and the 18k at 7500rpm. This is the most noticable difference. All in all I lost about 400rpm on the low end of the powerband to gain an additional 100whp up top, I'll take that any day of the week. At the end of the day I am beyond satisifed with this setup and tune. Maybe I'll bring it back some time soon to see what it'll make on E85. Thanks to Forced Performance for the MHI-18k, MAP for the cast manifold, ETS and VRSF for all the bolt-on's, Injector Dynamics for the ID1300's, Razorlab and letsgetthisdone for their wealth of knowledge, and Tony Szirka at UMS Tuning for the amazing tune. I have said this many times before, but the car is officially done.....until I get some cams of course :lol:

2008 Evo X GSR

Stock block/cams (95k miles, never opened long block)
MHI-18k w/ 18psi WGA
MAP cast manifold
MAP 02 dump
TiAL QR w/ 6psi spring
ETS Intake w/ 3.5" MAF adapter
ETS test pipe
ETS V2 Quiet Exhaust
VRSF 4" FMIC
Muse 1 piece UICP
ID1300 injectors
Asnu FP330E fuel pump (not hardwired)
Cobb 3 port EBC
Flex Converter flex fuel kit


Best pulls of the morning:

435whp and 417wtq at 30psi on E54
432whp and 400wtq at 29psi on E54


Notes:

IDC% at 29 - 30psi of boost on E54 at 7500rpm = 68 - 69%
All pulls done in 4th gear
AFR was 11.5 - 11.8
Peak timing on E54 was aroung 17 degrees
Ambient air tempreture was 82 degrees while car was dyno

https://scontent.fphx1-2.fna.fbcdn.n...73&oe=59B032EF

https://scontent.fphx1-2.fna.fbcdn.n...87&oe=59AE805B

https://scontent-lax3-2.xx.fbcdn.net...f5&oe=59D8F0E7

https://scontent.fphx1-2.fna.fbcdn.n...36&oe=59A163D3

https://scontent.fphx1-2.fna.fbcdn.n...8e&oe=59E32A29

https://scontent.fphx1-2.fna.fbcdn.n...c0&oe=59E9A882

https://scontent.fphx1-2.fna.fbcdn.n...99&oe=59E50E96

Dashed line - stock turbo/manifold
Solid line - FP MHI-18k / MAP manifold

Same boost, both E54. 400rpm loss down low for roughly 100whp gain by 7500rpm.

https://scontent.fphx1-2.fna.fbcdn.n...f3&oe=59A1AF89

Seems inline with the last 18k I did on E57. 430whp. One I tuned made less torque though (370wtq) because I ran it at 25-24psi at that ethanol % level.

Enjoy!

Thanks Bryan.

At this ethanol % anything above 27/28psi didn't net any hp gains. Only improved torque. I wanted around 400wtq to this is where we kept. Car is happy and knock free.

good numbers. makes me wanna do a 18k now

I recommend it. Perfect turbo for a stock long block car

Very nice!
wondering, what kind/ specs on the wheels and tires and suspension you are running?

They're Ambit RT8 (Volk ZE40 reps). They're 18x9.5 +15 and I'm running a 5mm spacer all around. Front fenders are not touched, rears are rolled. Car is lowered on H&R lowering springs. Only other suspension mod is a hotchkis rear sway bar. Tires are Michelin Pilot Super Sports in 265/35/18. Alignment is -2.4 (f) and -1.8 (r) with 0 toe all around. Tires are rotated every 3000 miles, pretty much every time I change the oil

Nice numbers. UMS is where I'll be taking mine when I get my flex fuel set up.

Good to hear man. Tony won't do you wrong

What a great set up! Car looks great and is quite the beast now.

Thanks man, the car rips. It always had the torque, now it's got the legs up top too

Yw! Yup, it sure does. I miss the HP I had on my Built 11STI, love the torque I have but definitely miss having 500+ HP.

Sounds like you need one of these turbos too :D

Yeah :)
Need to wait a little bit longer and then definitely will be going bigger.