Havn't tried pump e85 on pump but when I ran the csr e85 on the old car with stock engine/gt35 made about 30rwkw difference, on same boost and the lower rev ranges were much smoother. I am thinking about doing something similar to mine in attempt to max out the stock turbo. I think doing the below will be best. For late FG euro 4 I think needs a minor exhaust change to flow a little better, there's a restrictor between cat/dump. I would do the supporting stage 1 process west cooler / piping kit (the piping can get extremely annoying and burst from my own experience once running higher than stock boost) PW Surge tank kit with 460 pump like toads recommended, get the fitting kit so you get the regulator and the pipe replacements where required. (some people have had issues with 460 and fuel pressure, hence why recommended getting fitting kit) Obviously ID1000 injectors, Xcal3 and Tune. Hopefully the effects with smoother down in the lower rev range might help to spool a little faster which would be nicer but in that sense maybe also would be worth getting a zf tune. I have read the only problem is getting boost into the little turbos, hence why most try run max boost which is quite high as it tapers off in top end. However running e85 I suppose you can compensate where it loses top end by adding some timing. Some even porting the rear housing and adding actuator?????? There was a Nizpro car that ran 11.00 which had standard turbo on e85. had nizpro exhaust, cooler, injectors, surge, tune & zf tune and made about 360rwkw people on pump were getting ~ 320-330. so ~340-360 if correct boost could be met would be achievable. those little turbos are the most fun, so IMO for a nice run around street car that wont be a pig to daily drive would be perfect mods I think. IMO doing it all again I don't think I would do more than this level of power... won't stress the rest of drive-line and other components as much.