Moto-East Flex Fuel Kit, DW 700cc Injectors and DW65c Fuel Pump Install (9-29-14)
I finally got everything needed to go flex fuel. I've been wanting to try some corn juice for a while now, and thanks to @
victorb, got a moto-east flex fuel kit from him.
The Moto-east kit is a well thought out kit that comes with everything you need to complete the install. I had a bit of a problem though, the kit is for an FR-S. I have an 86. It's not moto-east's fault, I just did not do enough research on the matter. It turns out that the 86 has different fuel fittings than the FR-S, and the fittings on the kit make it impossible to install on an 86 as is. Moto-mike was really helpful on his end though, and gave me a few options to choose from. Either ship the whole kit to him and he will retrofit the correct fittings or show me the correct fittings and do it locally to save on overseas shipping. Thank you @
moto-mike for being a great sport! Issues aside, the whole kit would take maybe around 2-3 hours to install. I took my time with the wiring, and the fuel line side took around 30mins to do. I had a few confusing moments with the online instructions because it was for an ECA1 kit, while I had an ECA2 kit which comes with this kind of gauge.
DW 700cc injectors and the DW65c pump was a straightforward install aside from the argument on how many o-rings you must put on it. We went with the stock plastic spacer and one o-ring. I have gotten a few hard starts since the pump install and I'll see how it goes. Once the car is running, the idle is solid and the car runs smoothly.
Tuning was done by my regular tuners, Speedworks. The dyno used is the same dyno I have been using from the start which is in SCAG Automotive Services. I filled up with E85 with a 1/4 tank left of 100 octane (93 for the US people) and ended up with E58 as the ECA gauge informed me.
After a few runs, we ended up with 300.86 whp with 218.33 torque. The tune is not done yet, as I have to fill up with pure E85 to get tuning done for higher ethanol content. Not bad for stock 9psi pulley imo.
Here's a comparison for the current tune:
RED is 85 tune on stock 9psi pulley
BLUE is 93 pump tune on 9psi pulley
PURPLE is stock tune with headers. (could not find the baseline tune)
UPDATE:
I had my second fill up with E85 and according to the ECA, I have E71. I will probably visit the dyno after my third tank to get as much ethanol content to finish the tune. I have been driving it for a few days now, and had a few WOT runs. Midrange has picked up substantially, and it feels like E85 wakes the car up. Throttle response is crisper, and the car just feels lighter and peppier overall. The car just pulls, period.
The larger injectors make part throttle driving a lot smoother. I used to have a slight bog around 2000-2500rpm with the stock injectors but now it feels completely stock during daily driving and part throttle, it's amazing. I have a trackday coming up soon and will take further notes then.
Here's some pics of the revised fuel fittings and how the flex fuel sensor is installed on the car. It's on there pretty solid, and it does not contact any part of the chassis.
Thank you to Speedworks, SCAG, Moto-East, and Victorb!