Rob Dahm's Solution.
 

What do you guys think about this?
It honestly makes me wonder on if its all truths, but there's definitely a couple of things that clicked in my head when watching this video..

Good watch .
Agree with most of it but not all of it is relevant to the Renesis and the kind of power we make.

My biggest thinking was using E85. Would it be really worth it to tune my RX8 to use E85 or should I just stick to 91-93? I do premix anyways as well.

The video was really about how to make big power while making it last . If you aren't making 400plus whp .... there's not a lot in that video for us. Turbo 8's runing high boost really benefit from an ethanol mix . N/A ...no benefit

the thread title is very misleading; they’re not his solutions at all

skipped through it when released, nothing new that I saw, much that was applicable is on this forum in one manner or another

back when the S2 engine came out I chided a lot of people on here regarding all their theories about why Mazda raised the oil pressure; Rob gave the correct answer on that vid, but for us it has to do with how far off the Renesis reciprocating balance is from the factory. Of which there’s a thread I posted not long ago regarding Daryl Drummond’s extensive experience with that …

pretty good point hes not taking stock rx7/rx8 motors and trying to long term test anything hes only speaking to very small crowd not the everyday owner. If you arent premixing to some degree its just not smart in general but thats nothing new and like brettus said the ethanol stuff is negligible for the stock motors... also never gonna see problems that would need scalloping or studding in an rx8 i dont think

Ahh, Gotcha I understand now.

Yeahhh I guess I thought we could take our stock motors and start modifying them, but there really is no point if there isnt big HP numbers.

I thought he was implying that the e85 will keep a stock motor cooler also?...which would make it a good idea for lasting longer

and all teh noobs go


https://cimg1.ibsrv.net/gimg/www.rx8...6e801b6100.gif

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Check the angles...

I know I'm reviving a dead thread, but I do not think its true that there is not a benefit to e85 on a stock renesis.

Everywhere you read, including this forum it seems the number one killer of rotary engines is heat. To much heat and you break all kinds of things in these cars. Guess what E85 is super good at, running much cooler than pump gas.

Granted my car gets out on the weekends and goes to autocross and track days. I still think e85 would be huge. I have been trying to find out if the fuel system itself can handle e85, or if I need to go down the rabbit hole building out a better fuel system that I do not have to worry about lines not playing nice with e85. Unfortunately not having much luck with that.

in other words, you read some stuff on teh intrawebz but have no actual experience

it’s not huge, but there is a little something there for all out competition where you’re scratching for all you can get, but you have to understand how to actually get it.
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Not sure of the "true" benefits with an renesis power level but I am pretty certain the fuel system can handle e85, tuned as well for track use; or at least that was what I was told from a fellow member years ago. I would still be inclined to at least upgrade the fuel pump to a 340lph. Other than that though I believe you will be OK.

I never felt like the S1 was enough for full E85. Maybe a new one in top shape, but the history of the S1 pump isn’t the best long term even on pump gas. An S2 pump module conversion might cut it.

The 255lph is more than enough for even rhe highest power NA Renesis on E85. See my S2 fuel pump thread in the S2 aftermarket forum area.
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