[Ice88]

Originally Posted by Orion

Some nice bits of kit there.

Do you have any evidence that you will need larger injectors? See as these injectors are the same on the US turbo car, I would have thought that they would have sufficient headroom to handle even a solid NA build.

Thanks

Other then the Injector formula below no. And its somewhat confusing due to the reasons you mentioned. Only real reason I'm getting bigger injectors is for E85 as im skeptical of the numbers that Injector companies have come up with.

Originally Posted by BG1.8sp

220 engine Hp @80% duty = 360.94cc / 34.38Lb/Hr

for E85 see below

34.38 x 1.47 = 50.54

= 530cc

now this should give you some idea of estimated injector size on e85.

i dont know your actual target Hp... but just selected 220Hp at random.

Edit: All above @ 80% duty... good to leave some head room

Aiming for ~170 at the wheels. Which is about 190-200 at the fly I think.

Originally Posted by BG1.8sp

also question... why run a flex sensor?
Cant you do dual maps and just push a button switch from 98 map to E85 map?

from the specs

"dual maps which can be toggled with digital input."

just thought it would reduce the dyno time... not totally farmiliar with the adaptronic... seems pretty wicked from what i can tell.
does the "flex sensor" just need 2 maps to be made, 1 for E one for 98? and it "learns" and auto trims for anything inbetween?

or more like the Gm unit which chooses one of 4 maps (which ever is closest)

if its the learning type... awesome!

but if GM type then thought the toggle input would reduce dyno time and cost

EDIT: apologies for the tripple posts... I get excited about ECU's and electronics lol

One reason is that the most common form of E blended fuel is eflex which can be anywhere from 70-85% blend. Obviously the resultant octane level varies based on this, with the sensor the Car knows what % ethanol is in the car.

In regards to what its utilized for with the Adaptronic. The way the adaptronic works from my understanding is that with the presence of the Sensor it works out the ethanol content and adjusts the fueling requirements based on the ethanol. Its possible I believe from a few posts that the maps are able to blend.

i.e. I stumble across a servo with E85, get a tank full. Drive somewhere and want to top up before a mountain run or track day or whatever. Traditionally I'd be sweet out of luck if no e85, what happens is that the fueling requirements alter so that as I head towards a lower percentage concentration it adjusts the fueling etc towards the 98 octane map.

The way it does is simply done via a table that it looks up. I'll see if I can find some screen shots. Haltec do a similiarish thing AFAIK

Originally Posted by Orion

I think those are some ambitious numbers there.

The stock 280cc injectors will handle 180hp at 85% duty cycle. This is a more realistic hp number on 98ron and 85% duty should be ok as he has little scope to upgrade or significantly improve what he already has

180 Hp at the fly or wheels?

The other thing that we are neglecting is that I believe the Injectors we utilise are originally from an RX7. The Denso 440cc (WRX Injectors) are much newer and are meant to have a much better spray pattern.

I've been told the MX6 injectors are an upgrade too as well. Not sure how reliable this information is, personally taken it with a grain of salt.