obeezzy

I'm seeing a number of Supras making big gains with flex fuel E50/E85. I have searched but wanted to know if there is anything recent or new with C43s and flex fuel/tuning. I've seen some kits for sale, but is it worth it? I'm sure someone has tried already. I did see something about JB4 and some E something. Just want to know if that is still the best option. Thanks.

obeezzy

Anybody?

Freder8d

I Originally had a Eurocharged Tune but got into a pissing match with AMR fanboys and asked Jerry if he could give me a bit more aggressive tune. Sent him my Tune via email, they tweaked it and emailed it back to me. He said to add a few gallons of E85 and I'll like the results. He wasn't kidding!! He recommended 2-3 gal of E85 and ran it with 2-3 gal for a bit, but couldn't help myself finding out how much I could safely run. After having put on about 40k miles on this tune and playing with the blend, my max is 4.5gal before it trips a CEL. When that happened I just added more gas and it went off. The obvious benefits from E85 is the octane rating is a lot higher than Premium Gas. And out here in So Cal the highest we can get is 91. Also E85 burns cooler than gasoline allowing the car to use more boost. The tune adjusts to this and I can definitely notice the difference. Now to go full E85 you'll need a HFFP and a LPFP. Martin Engineering can provide you with these. Injectors are more than up for the job. Methanol injection is something else you should look into. Hope this helped

Star4life

Yes we at Martin Tuning have pieced together the perfect upgrades for the c43 and us and a few others are running e50+ with proper fueling upgrades. We recommend no more than e25 with stock fuel system. The check engine light Freder was talking about was most likely a low fuel pressure trip. You do not want to hit that limit too often. Low fuel is bad news for an engine if the computer doesnt catch it in time!

Freder8d

With what you were talking about referring to my CEL would I notice the car, in a sense starving of gas at WOT or speeds above triple digits trying to pull at full boost? I haven't yet come across that yet. Or does that not happen? And for clarity what is the ratio for E50 or E25. If I'm putting in 4 gal E85 wouldn't that be E25 to me?

C43HeartBoost

Here is a useful ethanol calculator:

https://www.brewcityboost.com/about-...ol-calculator/

Obviously is presupposes e85 actually being full e85 (but the pumps in CA that sell e85 can be as low as e50).

obeezzy

How do I find more info on Martin Tuning? Tried Google but not sure it was the right site? Thanks.

Star4life

martintuning.com is the site. they are newer so their google search isn't probably high.

4 gallon is between e25-e30 considering most standard pump gas has 10-15% ethanol in it already.

yea the CEL you are seeing is due to low fuel pressure most likely.

sliqdaddy91

Star4life, does martintuning tune cars? What can a c450 stock expect to gain (whp, and trap speed) with a tune and 93 octane? What about the same set up with E25 on stock fueling? Next time I'm in Michigan I need to check out the shop! Should be there next month, might bring my car for a tune : )

ParadigmDawg

You guys better be checking your Ethanol content every time you fill up. An old fashioned test tube works better than an inline analyzer. Content varies between 55% and 90% and if you are fueling for a hot tune, you don't want to end up with an E30 when you are tuned for an E70.

I run E30 and it makes a huge difference but I have an E30 tune.

My car club has a few blown 63's from the guys who never test the content.

Exvette

are the fuel lines OK for more than 15% ethanol? my understanding is that unless the fuel lines are OK for E85 the high ethanol content will damage them. not to mention the injectors.

Freder8d

I'm tuned by Eurocharged. I got in a pissing match with some AMR fanboys and asked Jerry to remap my tune. Gave me one labeled Race and told me to add a few gallons of E85. Also have BMS Air intakes system and I can really tell the difference from the first tune to this race tune. I've got about 40k miles with it no issues and I drive the **** out of it!