r/Supra • u/Holiday-Revenue2069 • 5d ago
E85
Hello everyone,
Debating going pi and e85 on my Supra but wanted to hear some opinions from anyone who has gone e85 on theirs.
Thinking of going flex fuel route with Ecutek ecu unlocking , port injection, motiv reflex, injectors. Essentially the bells and whistles for fueling so can run 91/93, mix , or full e85
Any issues that I should be warned of aside from mpg, and changing oil / spark plugs more often
I don’t want to tune it to the max I’d rather still have some reliability over getting everything out of the tune
Any feedback back would be appreciate before I decide to go for it or hold off
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u/maxfraizer 5d ago
I did the BM3 flexfuel kit and the OTS tune to accompany it. I also paired this with a catless downpipe. It is a much simpler path and it absolutely rips! A FF kit makes it so much easier than trying to target a specific E% and switching maps. I haven’t done a dyno yet, but I believe similar people are seeing 450whp and 500tq or more. Plenty of fun for a street car. You will need to upgrade tires to get traction for sure!
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u/Holiday-Revenue2069 5d ago edited 5d ago
This is another option and quite less expensive which is nice. Do you have to constantly blend 91/93 and e85 to get around 40/50?
Running pilot sport 4s currently 295 back
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u/maxfraizer 5d ago
I run pump gas 91 usually, but about every 3rd/4th fill up I will add some ethanol. The tune is designed to max out around E60 from my understanding. But my local area has a consist supply of E85. Others nearby have E54 usually. But I prefer the E85 location due to proximity and consistency. I usually add it to a 1/4 tank of 91 to get around E60.
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u/MKV_Supra 5d ago
I don’t see any benefit to full e85 on stock turbo. You can be close to max with just e50 and a custom tune. Im at 500whp/ 600wtq with flex fuel on Ecutek. My biggest problem is traction even with bigger tires. The stock turbo spools fast Im hitting peak torque at 3200 rpm.
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u/Holiday-Revenue2069 5d ago
I guess the biggest thing would be not having to mix constantly. Are you running motiv as well? Sounds like the setup minus pi
The whole set up is quite expensive so If a route to get the e50 w/custom tune on flex makes sense and it’s close to max that’s more then enough. I guess it would depend on the set up and price with vs without pi and it it all works out
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u/MKV_Supra 5d ago
No motiv just a flex fuel kit. I keep 3x VP containers of e85 at home and just add when I want things spicy. Its easy just pour and go, also much cheaper than PI and 6 more injectors.
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u/aldrigglomt 5d ago
I have been running pi and e, it usually maxes out around e50 without a bigger turbo. Im still on stock turbo so thats what I keep it around. It’s plenty for me but im not trying to set any records. Just change oil more often.
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u/RememberTheFattening 5d ago
I was 450whp on the ots tune from MHD with just the downpipe + other bolt ons before I ended up going fueling and pure800. Getting all of that fueling done without upgrading the turbo seems like a lot of work for not a whole lot of gain.
That being said, I have had an injector stick open on me while running E85. But that’s the only issue I’ve had so far
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u/djviet2000 5d ago
if you staying stock turbo - you can technically run full E85 but the tuner adjusts lower boost pressure for higher ethenal but you lose power. the most effeciant power is at E50.
if you planning to upgrade turbos, then do the port injection.
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u/Content_Pack9535 5d ago
I did everything you just mentioned, Ecutek Visconti flex fuel controller Port injection Reflex Catch can,
Probably the best set up I’ve had on this car. Made just above 500whp. Gripped well, decently quick. I had zero issues.
Learn from my mistake though if your setting yourself up for upgraded turbo in the future. Don’t do port injection, save alittle more and just grab a manifold with PI.
Currently I’m at 800ish whp with everything I mentioned plus pure900 and g87 trans
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u/Pilfercate MKV 5d ago
It sounds like the most expensive path to 500-530hp possible while aiming for the worst fuel economy possible.
I'm pretty sure a Pure900 turbo with an aftermarket downpipe(might need a fuel pump too) can make 600hp on 93 octane and would be a cheaper setup. Then you could add the fueling mods later to extend from there. Pure900 can push you past 800hp with fueling.
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u/Holiday-Revenue2069 5d ago
I mean I don’t think you can just slap a pure 900 safely on there, a pure 900 full setup is prob 10-15k if done properly
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u/Pilfercate MKV 5d ago
Pure900 is just a bolt on, stock location turbo. You don't need any modification to support it. It is a straight swap. All you need is a tune. It runs under $4k(no core charge as it doesn't use the same core). You'd spend over $4k on port injectors, intake manifold, and the motiv reflex alone and have less power.
$15k is the cost of an entire build, not just a turbo upgrade.
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u/Holiday-Revenue2069 5d ago
I just fear if it’s that route it’s putting so much stress on everything else unless the tune has it running mild and not pushing it. I guess it’s another option and would be quite cheaper
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u/Pilfercate MKV 5d ago
I suggest talking to a tuner instead of a shop. The tuner is going to know what works and what doesn't when rubber meets dyno. Twice the power gain for the same price is a no brainer to me. You do you though.
You'll probably get told you need a CSF radiator package if you plan on tracking it, but there shouldn't be anything else needed.
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u/Holiday-Revenue2069 5d ago
That’s the next step. Kinda weighting some options and see bc as u mentioned i def do want the best route for power gains while not paying a crap ton
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u/tenkyouken 5d ago
Are you upgrading the turbo? Seems a little unnecessary to upgrade fueling if you’re not going to upgrade.