ECU Resets

[2003GT]

I have heard alot about resetting the ecu. Will this actually gain me anything at all. BOB

[ricerrx7]

Nope, nothing at all.
Check this thread: http://www.elantraxd.com/forums/showthread.php?t=4877&highlight=dyno+thread&page=2
My dyno sheet shows what reseting the ECU does.

[2003GT]

Ok Thanks what is the SRI and the Coolant bypass everyone is talking about. BOB

[Cypher]

moving to new members forum where there is NO FLAMING (warning to other members)

[Pete03GLS]

sri is a short ram intake, its a performance upgrade, over the restrictive stock intake system, and the coolant bypass is pretty much the most useless mod anyone has thought up of for our cars, it yields NO gains, so i wouldnt even bother doing it.

[Cypher]

Do you even understand the purpose of the TB bypass?

[xdforme22]

EDIT: they sort of beat me too it but...

SRI= Short Ram Intake. More or less equivalent to putting a con filter on that flexible tube coming off of the engine. Many people consider a CAI to give more gains than an SRI since the air the SRI "breathes" is heated up to a high temperature by the engine.

TB Coolant Bypass is reconnecting a small coolant hose which normally allows coolant to flow through the throttle body so that coolant does not flow through the TB anymore and thus allows for slightly cooler air. The reason coolant runs through the TB is so that it will not freeze shut or open in cold temperatures. There is debate about whether this has much effect.

[Pete03GLS]

yes i do, ^ he just summed it up. and i stand by my word, that the bypass mod, has NO noticable effects... hood spacers, cool the TB more than the coolant will heat it. so instead of a bypass, do hood spacers.

[WytchDctr]

Nope, nothing at all.
Check this thread: http://www.elantraxd.com/forums/showthread.php?t=4877&highlight=dyno+thread&page=2
My dyno sheet shows what reseting the ECU does.

your dyno sheet shows what turning the a/c on does (In that thread anyway). ... that or I am reading things wrong because I feel like total crap right now. A few other dyno's show small gains after an ecm reset.

[Cypher]

go find my dyno thread, I think I gained 6whp and 8wtq with a reset? too lazy to find my thread.

[ricerrx7]

your dyno sheet shows what turning the a/c on does (In that thread anyway). ... that or I am reading things wrong because I feel like total crap right now. A few other dyno's show small gains after an ecm reset.

Woops, you're right. Wrong dyno sheet. But if you search around you'll be able to find it.
Pete, when you do the coolant bypass, you're taking 195 degree water out of the throttle body. You think hood spacers are going to accomplish more than that?

[Pete03GLS]

yea i do, infact, i kno they do. because after a long ride from school, i pop the hood and touch everything, IM and TB... and everything is completely cool. wat u also have to un derstand is... HOW MUCH 195* coolant goes thru it... it only takes a lil to keep it above freezing temps, its not meant to heat it up so its hot. so i stand by my words, bypass is pretty much useless.

[ricerrx7]

Doesn't matter how much is going through it, it's still going to be 195 degrees....

[Pete03GLS]

yes it will matter, because the TB could have more mass to it, then the lil bit of coolant going thru it can warm up, ESPECIALLY with my hood spacers, either way... the air rushing thru the TB doesnt have any time to be bothered the with the temp of the TB, so its pointless and useless either way.

[ricerrx7]

I'll agree that I didn't feel anything. But I'll still do it to every car I ever own...

[2003GT]

Ok so ECU resets work then. I am guessing that by doing this the ECU is learned to the way you drive as to were it was used to the person before you. So with the SRI its cheaper to just remove the box and put on a cone then. My Friend did this with his eclipse. BOB

[xdforme22]

Yeah, but you will see better gains from a CAI. If you go to the N/A section you can find some pinned threads discussing it. Also, lets try to keep the TB debate out of this thread. I've read about it enough already and I did state that it was controversial.

[2003GT]

OK CAI Stands for ??? Sorry I am new to this. BOB

[ricerrx7]

Ok so ECU resets work then. I am guessing that by doing this the ECU is learned to the way you drive as to were it was used to the person before you. So with the SRI its cheaper to just remove the box and put on a cone then. My Friend did this with his eclipse. BOB

That is incorrect. It has nothing to do with the way you drive. It has to do with emissions. The ECU has a baseline map that it reverts to when you do the reset. When you start driving, the ECU reads the O2 sensor to see how the mixture is. The ECU reads that baseline mixture as bad, and adjusts accordingly.
CAI stands for Cold Air Intake.

[xdforme22]

Thanks ricer^ Sorry I forgot to define that.

[2003GT]

Should have guessed thats what it meant. I will just get a cone to put on the end for now. Also what about throttle body spacers. Thanks BOB

[kylemorg]

^ You're better off with an intake manifold spacer. www.compactdivisions.com sells them --carbonman on this forum is the maker of the parts.

With the phenolic intake manifold spacer, (installed between the intake manifold and the cylinder head) the whole aluminum intake is insulated from the heat of the engine head.

[2003GT]

Ok I will do that eventually. Also my Throttle body and top of manifold is very warm is this because of the coolant or what. BOB