5sfe performance mods Options

[ncampb]

I have a piggy back ECU installed that makes my Celica "flexfuel". It runs way better on E85 than pump gas.

This mod is great because it increases performance and saves me a bunch of money on fuel. E85 ethanol pumps are going up everywhere, and if you have one near you, I would consider this upgrade a necessity.

E85 is 105 octane. Thats why it will increase performance, even on a 5sfe with no mods. The owners manual "recommends" 91 octane so you know that higher octane is going to increase performance. The easiest way to increase performance is to increase fuel quality, and this mod will save you money at the same time.

[Bitter]

oh boy....

your gt takes 87 PON octane, also called 91 RON octane. its a bit of an oversight in the manuals, my geo prizm has the same typo in its owners manual.


your fuel system is not made to cope with such high ethanol concentrations. over longer periods of time the higher ethanol will swell and rot rubbers in the sytem. nitrile is used in flex fuel vehicles.

the 'special box' simply tricks the PCM to inject more fuel by altering some sensor inputs. probably has it running on the rich side, even for E85.


if it is true that your car runs soo much better on E85, then its likely you have carbon deposits on your pistons or your head. the high octane of the E85 is a bandaid, cleaning the deposits out would be the correct thing to do.


i could go on and on...

your 5S-FE with its 10* btdc timing and 9.5:1 cr and no VVT is not anywhere needing the high knock resistance of E85.

[delusionz]

your fuel system is not made to cope with such high ethanol concentrations. over longer periods of time the higher ethanol will swell and rot rubbers in the sytem. nitrile is used in flex fuel vehicles.


your 5S-FE with its 10* btdc timing and 9.5:1 cr and no VVT is not anywhere needing the high knock resistance of E85.

points i was about to make in his other thread

E85 is 105 octane. Thats why it will increase performance, even on a 5sfe with no mods.

Bull****. I'm poor but I'm not stupid, & I don't care if you feed your engine bull**** but don't endorse others to do so.

Our engines are incapable of efficiently burning ethanol in stock form, As bitter points out spark isnt advanced enough for the high burn resistance of 105 ron which means lost energy of each piston blast, The low 9.5 compression ratio of your 2.2 FE pistons will further increase the high ron effect (burn resistance) so to combat these power decreasing burn slowdowns you're running your engine unacceptably lean once again further decreasing power all the while acknowledging that alcohol has oxygen content which by nature of increasing oxygen requires .... guess what? more petrol!!!!!!

hell yeah your getting better mpg and paying less at the pump....

but all the while your engine and your fuel lines are paying a tremendous price for it.... not to mention what happens when you try to floor what you've just turned into an ultra-lean, energycontent -lacking, ignition-retarded, low-compression motor

well done, you've increased performance.


PS. I wouldn't even use E10 on my stock 3S-GE, I only fill with 95 RON.

This post has been edited by delusionz: Jul 7, 2008 - 4:45 PM