Besides a fuel pump and tune what else is need. Injectors? Why is a tune needed. What about race fuel or turbo blue 110 octane. Thats race fuel.

 

Google it
You need to burn a sh*t load more ( like 30-40 % ) E85 than reg gas , hence the need for bigger injectors and supply

Because with 87 the tune is set up to achieve a AFR of about 14.7:1 ;with E85 it needs the AFR to be more like 10:1 "

Race fuel is just higher octane so considering the cost is generally a waste on a street engine unless you have a extra high CR that require a higher octane gas.

 

So u cant have one system like new cars it would have yo be one or the other

 

It is best if you are running E85 in our cars not to switch back and forth. But depending on how you tune your computer you can run both.
I am one of the few that is running ethanol in a thirdgen, Although my mix is 98% ethanol to 2% gasoline as I make my own fuel.
Here is what I changed to make my TPI car to run on E85 or better mixed fuels.
I changed my fuel pump to a Walbro E400.
New fuel lines to stainless steel as ethanol will eat regular fuel lines over time.
New fuel injectors 36lbs , get new not used injectors here.
an adjustable fuel pressure regulator , I'm run 50 psi
then I learned how to tune my ecm , With ethanol you can give it a lot more timing, And I adjusted the injectors pulse width.
And I'm using a hotter sparkplugs than stock.
I installed a wide band O2 sensor, The stock narrow band O2 sensor wont register like you will need.
I had to do a lot of data logging both on the street and the track to get my engine to preform at its best.
If you are doing this just for cheaper fuel cost and buying the E85 from a gas station you wont be saving any money. The only way to do this to save money is to make your own.

 

No I wont do the e85 swap (E85 is as common as 110 octane) just wanted to know its just a few more bolt ons and im done with 1st gen sbc I may get a bigger cam. I just wanted to know thanks

 

 

I’m actually thinking about this myself. Race fuel doesn’t seem easily attainable. E85 is near me. But the thing is I have the fitech tpi. So you can adjust for ethanol percentage. Might make it easier to switch back and forth if needed. Thing is not sure if I need to do a lot of changes to my current set up. Fuel lines are obvious. Fuel pump is compatible but is it strong enough. It’s a racetronix pump. I’m running a 383 stroker and have 36 lb injectors. Are the injectors big enough to handle it?

 

Done properly, an E-85 engine should have a lot greater mechanical compression to take full advantage of the fuel. I was involved in a Dart block E-85/385 SBC, and it was built at just under 12.8:1 static CR. When it started, it ran pretty well. Below about 50°F it needed some gasoline (E10) to get started and took forever to build any temperature, but finally got there. In hot weather, it started easily and stayed pretty cool during heavy runs. It was NOT set up as a flexible fuel system with automatic timing retard/advance and compensation with a WB oxygen sensor, so it was a bit more finicky.

Any full-on conversion would probably best be done with a retrofit factory flex-fuel system and mechanical changes to make it similar, unless there are now aftermarket systems designed for multi-fuel control.

 

You really need to add a flex fuel sensor because E85 isn't always 15:85 and the exact ratio matters when calculating fuel tables
For the OP, that's a nightmare to add to the factory ECM
For aftermarket ECMs like Holley/FiTech it's a programmable input. Pretty simple

Here's what FiTech has to say about it. The manual link goes into detail
https://www.fueltech.net/products/flex-fuel-sensor

Lines/pump/INJ sizing comes down to what engine combo you're running.
255lph pump, 3/8" feed, 36lb injectors are similar to the early 2000's GMT800 flex fuel trucks running LM7's

 

when you switch to e85 fuel you need to increase the size of your injectors by at least 30%. E85 has a much lower density than regular fuel and standard injectors have to burn approx 30% more fuel with e85 than with gasoline. So your injectors may not be able to handle the flow needed for the increase in volume which will cause you to run way too lean.

How much horsepower are you planning to run? Naturally aspirated? Turbo?

We carry everything you need. E85 compatible lines, fittings, AFR's, fuel pump, fuel filters, etc
We'll be more than happy to help you.

 

If your engine already runs well with 36# injectors and you want to switch to e85, you will need 48# injectors (tad more than the needed 30% increase), you would need to re-scale the BPC, then finally re-tune around other parameters (VE/PE/AE). All O2 sensors measure in Lambda, AFR is just a scaled interpretation. Just get a compatible fuel pump and fuel system designed for ethanol...

- Rob