E85 Questions

[Mattyfreeman]

wondering if anyone knows much about E85 fuel? did some reading and found fuel consuption can be reduced and it can take off a varnish that petrol leaves in fuel system which can clog injectors ect, also wondering if the 14yr old engine/fuel system components eg; mild metals, plastics can handle that amount of alcohol???... but its haisy on effects to performance, maybe increasing power with tuned ecu's. Iv got a r33 rb25dett and want to get it tuned soon, wondering if i will need a new ecu(only got stock atm) to run E85, and multiple maps to go back to regular petrol? Cheers

[NYTSKY]

You need to modify your fuel system to cope with the extra volume needed.

Yes you will definitely need an aftermarket ECU.

E85 does clean your fuel system, you will need to replace your fuel filter every 1000kms for 10,000kms to make sure you catch all the deposits. Its a good idea to replace your fuel filter at every service after that.

Fuel consumption will increase due to the need to burn more of it. Not sure where you read it will give you better economy.

[Mattyfreeman]

what kind of fuel system modifications? obviously larger injectors, but will it need fully braded lines or something? very complicated/expensive?, and what about power increase and the wear on the engine, better or worse for the life of engine? will it need changes to maintenance/oils used etc.. so essentually is it worth doing, keeping in mind a new ecu and tune is already on the cards. cheers

[NYTSKY]

what kind of fuel system modifications? obviously larger injectors, but will it need fully braded lines or something? very complicated/expensive?, and what about power increase and the wear on the engine, better or worse for the life of engine? will it need changes to maintenance/oils used etc.. so essentually is it worth doing, keeping in mind a new ecu and tune is already on the cards. cheers

For a daily driver i would not switch to E85 until they roll out more servos that stock it.

There are power gains to be had roughly 15%. But for a stockish car the benefits are in the reduction of detonation, which intern saves your engine.

The ONLY oils i would use for E85 are Royal Purple and Motul 6100 Synergie.

Do not use oils which contain ester.

What power level are you aiming for?

[R31Nismoid]

Sounds like a stock based car, which honestly, is not worth the coin to go E85 as it means injectors/ECU/AFM just to use a certain fuel

[Mattyfreeman]

Sounds like a stock based car, which honestly, is not worth the coin to go E85 as it means injectors/ECU/AFM just to use a certain fuel

yeh it is fairly stock, might happen in a few yrs when i end up doing the modifications along the way, and with more servos stocking it, cheers