2010 XRS ecu remapping for 94 octane

[Teslank]

like the title suggest, i am looking for a possible ecu remapping/reflash to use 94 octane gas,
im looking to get into more power, and first i was thinking about using the potential of better octane than 87 regular, in canada i can get 94 at all petro canada

first question : will it have any real potential(i am thinking about my friends mk4 1.8t jetta, 180 hp to 220 but need to use 91 or better, all stock not even a cai)
second : is there any way to do a ecu remapping ? for a 2010 corolla XRS ??

third : use a offset timing key on the crank ?

fourth : switch to ft-86 when it gets out

[BLiT]

I'm not exactly an experienced technician, but I doubt that changing the gas type will give you much more performance.

As for the ECU remapping, I'd say it'd probably just be best to by a piggy-back ECU system like the GReddy E-Manage. I've been contemplating getting one for myself, actually.

[thestone11]

Higher octane doesn't mean more power~!

http://www.youtube.com/watch?v=dDHwCWdrtdg

Just watch it~!

[Teslank]

im not really sure about what im gonna say, but lets give it a try!

by using better octane gas and more timing advance, will give more power, right ?
thats the general idea and it wont need any mechanical modifications

thats what we did on my friends jetta mk4 1.8t, remap for more boost but needed higher octane 91 minimum(could use regular before that)

so the engines makes more boost but need more octane...

is this applicable on NA engines ? i think yes because performance cars use high octane gas to achieve high power...
using regular on our toyotas is because toyota make economical cars remember?

[Jeff Lange]

Yes performance engines use higher octane to control detonation, but usually it will be due to a mechanical need, such as higher boost from a turbo, or higher static compression ratio from high-compression pistons.

Ignition timing could likely net you a few horsepower with a higher octane fuel, but I doubt the difference would be significant.

As for reprogramming the stock ECU, nobody that I am aware of makes any newer software for these ECU's other than Toyota, so that may be a problem as well.

If you wanted to tune the car to attempt to get more power out of the engine, a standalone ECU would be your best bet. $$$

Jeff

[thestone11]

Originally Posted by Teslank

im not really sure about what im gonna say, but lets give it a try!

by using better octane gas and more timing advance, will give more power, right ?
thats the general idea and it wont need any mechanical modifications

First our engine is design to run regular gas, there is no need to go higher octane gas. Higher octane gas doesn't provide you with extra power. The main difference between the two is higher octane gas burn slower than regular gas. So on a high performance engine with high compression ratio, it is better to run higher octane gas to prevent knocking and pinging and usually it is required by the manufactures as well. Running higher octane gas on a car that only needs regular gas is a waste of money and it will do you more harm to the engine, coz the engine cannot fully burn the gas and leaves more carbon deposit during the burning cycle. Unless you plan to do force induction or higher modification on your internals, there is no need for that.

[Teslank]

i dont think higher octane cause more deposits, octane only controls the speed of the fire when in compression or near top dead (10degree), in the combustion cycle(180degree) there is plenty of time to burn the excess, even when the exhaust valves open soon in the combustion cycle...(still continues to burn)

im gonna try to get a hold of a toyota engineer about this idea here, and on another idea, i recently switched from regular to 94octane, and i got really good milage results since(460km on 40liters) with regular 410km was the best i could do...(and better power? hard to tell)
dunno if this event is only a between-steering-seat variable
and i was thinking about power specifications... what is the octane they are using when doing the dyno charts at the factory....
and what about ecu using knock sensors to get the most power.... if you switch from 87 to 94, that gives less detonation, therefore more advance timing right ? more power ? more economy since i press less on the pedal to get to X speed ? or cruise ?

[BLiT]

Again, you're not going to get more power out of simply putting in a higher octane. >.<

[d0za]

okay just to get things straight . higher octane doesn't give you more power. remapping the ecu will give you more power but you MIGHT need a higher octane to handle the timing to prevent knocking. Our engines are smaller compression ratio and probably won't get hot enough to detonate or knock so no need to change your fuel . Main point to get across, higher octane won't give you more power. In the chance that I'm totally wrong, sorry.

[kmfdeviant530]

Originally Posted by BLiT

Again, you're not going to get more power out of simply putting in a higher octane. >.<

He's right, you don't get more power from just higher octane, the reason some people use high octane is higher compression or gored induction. Example a mustang with highcompression heads and pistons, with a supercharger can utilize the high octane due to the need of it. Like the 9th gen xrs corolla, it's partially the same motor from the celica minus the high compression heads, hence why it produces 10 less horses and doesn't need high octane, the only thing you'll need higher octane for on our corollas is if you switched to something high compression or forced induction

[Teslank]

okidoki!

[Jeff Lange]

Originally Posted by kmfdeviant530

He's right, you don't get more power from just higher octane, the reason some people use high octane is higher compression or gored induction. Example a mustang with highcompression heads and pistons, with a supercharger can utilize the high octane due to the need of it. Like the 9th gen xrs corolla, it's partially the same motor from the celica minus the high compression heads, hence why it produces 10 less horses and doesn't need high octane, the only thing you'll need higher octane for on our corollas is if you switched to something high compression or forced induction

The engine in the Corolla XRS is identical to the one in the Celica. Any differences in power were due to tuning/exhaust/ratings, nothing mechanical.

Jeff

[kmfdeviant530]

Originally Posted by Jeff Lange

The engine in the Corolla XRS is identical to the one in the Celica. Any differences in power were due to tuning/exhaust/ratings, nothing mechanical.

Jeff

Correction, I did not realize that the corolla took premium, the compression ratios are different tho.

Wrong again. Bad source of info apologies

[kmfdeviant530]

Which brings me to a question. Since it's a 1.8l of the z family(I know not 2zr but stay with me) could you use a celica or 9th gen xrs head and put it on the 2zr-fe? Making it high compression and adding top end horses?

[Jeff Lange]

No, ZR is not ZZ, they are 2 entirely different engine families.

Jeff