Arron 227 Report post Posted May 4, 2015 hi guys what do you think about running e85 in a s50b32?? the engines are in our race cars so dont get driven lightly is it a good idea to run e85? or would we have to have the dme remapped and put bigger injectors and or fuel pumps in them?? any thoughts are appreciated Quote Share this post Link to post Share on other sites
Apex 693 Report post Posted May 4, 2015 I know a lot of us Rally guys are having issues with it, mostly problems with it clogging injectors.. For it to work, the top teams will drain the tank after an even and run through 20 litres of 98 on a different map. General consensus is that it is a PITA. It could work better in a track racing situation as you are essentially doing sprints with the ability to service injectors in between races if needed be. Quote Share this post Link to post Share on other sites
Apex 693 Report post Posted May 4, 2015 And yes, you will need new fuel injectors and a custom map made for it to work. Quote Share this post Link to post Share on other sites
thorburn 121 Report post Posted May 4, 2015 The reason it clogs/ rusts shut your injectors is because ethanol is hygroscopic. So just like your brake fluid, it will absorb water. You can get e85 compatible parts for the fuel system. Everyone knows the benefits of e85 so i don't need to rant on too muchTo make the most of it you'll want an aftermarket ecu that will handle a flex fuel sensor. Some ecu's are a lot better than others in this area. e85 from the pump might not really be e85 Quote Share this post Link to post Share on other sites
polley 916 Report post Posted May 4, 2015 It also cleans the years of varnish and sh*t out of your fuel system left behind from petrol, which also clogs filters and injectors Quote Share this post Link to post Share on other sites
E30 325i Rag-Top 2958 Report post Posted May 5, 2015 It is also good at eating rubber seals, etc. in the fuel system. Plus it eats the foam in race fuel cells. Again this crap then get sucked through your fuel system and clogs and jams things up. Funny how Gull don't mention any of this on their fuel pumps... Quote Share this post Link to post Share on other sites
jake1829 119 Report post Posted May 6, 2015 (edited) Been running it for close to 2 years in my car at the track sessions or weekend drives - haven't had any issues running it ( I only needed to get a in-line LPFP or replace the factory LPFP with a aftermarket one) to run above E40 map Love the 45HP+ and 95+Nm TQ it gives me over my 98 map Edited May 6, 2015 by mod335 1 Quote Share this post Link to post Share on other sites
E30 325i Rag-Top 2958 Report post Posted May 8, 2015 Newer engines and fuel systems are designed with ethanol blends (and other fuels) in mind, so have different materials in the seals, etc. Plus you will have less crap build up in the lines tank, etc. being a newer car - so there is less stuff for the ethanol to attack and therefore clog things up with it. Certainly its good for power and torque increases (on pretty much any engine) but unfortunately there are draw backs for those running older systems. 1 Quote Share this post Link to post Share on other sites
