#1 Run an Ethanol Content Sensor w/ an ECU that has target lambda values variable with Ethanol Content and LTFT and STFT able to hit those figures effectively.

Tune on what's available or what you're willing to put up with. I'm tuning on 91 octane and Pump e85 and the sensors are taking care of the work for me in regards to matching my target lambda values per ethanol content.

#2 Rx8 Spark Plugs and setting gap to 0.018-0.025"

I hope you have enough fueling for this... I'd expect 6x ID1700x's for really getting into e85 at higher power figures.

 

Well I did install ethanol content analyzer but unfortunately I have a microtech lt10s so no of that will be happening I just figured I would tune to what’s available and keep an eye on ethanol content to make sure it’s consistent.
rx8 factory spark plugs ? What heat range are they
my fuel is I’d 1300 pri
id 1700 sec

 

 

Knock suppression/combustion stability doesn't really improve on port injected motors above about E40. Gains above that are only very marginal due to extra evaporative cooling of the intake charge. You are wasting a lot of effort with mixing, just tune to what you get and check mix doesn't vary. If you are worried you could make a basic spreadsheet with your base tune flex % as an input and current flex reading which gives you a master fuel trim % to apply as a close enough offset. I'm going to offer my unhelpful personal opinion on microtech ecus for anything other than a race fuel only Billy cart. In the bin.

Plugs NGK 7756 R7420.11 could probably use a slightly hotter plug, 10s/10.5 likely to be ok on ethanol.

 

I see your down the highway. Maybe we'll run into each other this summer.

 

 

 

10s are probably fine, how much boost are you looking to run? Power goal?

The egvs are more likely to cause interference issues in electronics but the the microtechs do seem the handle that well if wiring is right, I don't think they reach quite as far into the housing either so there may be a very small running improvement there too. If you have a hand controller in the car and do run an independent flex sensor it is probably much faster and easier to bump the fuel trim, realistically no more than 1 or 2% with the ethanol content changes you are likely to see than trying to mix petrol back in.

 

This is why you run heat range 9. Ethanol Blends are already harder to start, so why make things even harder?! On e70, you have about enough injector for ~425whp @ 3 Bar.

RE9BT eBay for 4x RE9BT @ $60

 

The car made more power w less injector before. At 21 psi 503 whp . I’m not really sure what duty cycle was it was like that when I bought it
the old owner sent me a video that showed dyno run .

My old car made 424 whp on one dyno
and 418 whp on another. At 15 psi!
! This setup at 21 psi is much faster
so I don’t buy that I can only make 425whp? On e70

 

 

unless your injectors are pre-turbo and you are still running a manifold reference reg the differential pressure across them which drives flow will still be 3 bar. That is the whole point of the referencing system so that increasing/decreasing open time gives a linear response regardless of being in boost/vacuum and dead time is consistent.

 

Yes, but his fuel pump will be at 63psi + pumping losses, so likely somewhere around 70psi. Following your voltage vs. pressure chart from your fuel pump manufacturer, you can tell pretty quickly that you'll be running out of pump on e70.

By increasing nominal fuel pressure, the injectors will increase flow at the expense of dwell time, but that will continue to bring your fuel pump threshold down (it'll have the capacity to make less power as it flows LESS as pressure increases).

Either way, you're topped out in the mid 400s without at least two fuel pumps and a raised nominal fuel pressure.

Your Injectors = 6120cc/min @ 100% DC @ 43.5psi (3 Bar)

A lot of guys run Dual Bosch 044s at 75psi nominal pressure and those 4x injectors can now do 8110cc/min @ 100% DC @ 75psi, but now with more heatsoak, and fuel pumps running roughly 101.5psi comparatively. Those pumps don't mind the high pressure, the Walbros are terrible for anything over 3-4 Bar nominal. Pierburg makes nice pumps as well...

At this setting, you can crack 500whp, but fuel temps will create cavitation issues as the vehicle is driven for longer durations. It would be almost mandatory to run a fuel cooler. I prefer the -8AN Derale units with Twin Fans.

 

I'm down the highway in Columbia. I'll be there for some Cars and Coffee and other rotary events.

 

 

Here is your problem. The A1000 is absolute **** for high pressure (turbocharged) applications. My whole strategy I wrote to you above about how the Bosch 044 kicks everyone's *** over 70psi pump pressure and how you could "stretch" the 4x injectors to your needs by higher base pressure doesn't work if you have a pump like this. You could add 12x ID1700x and your problem would still be the PUMP...

So that's the part you need to address.

 

Can the Bosch pumps be ran externally like the a 1000

 

 

You would tee them. This has been done for well over a decade and is incredibly well documented. A simple search will find you exact part numbers you need to do so. -8AN Feed (IN/OUT) and -6AN Return.