resetting the ECU

[idrivemyself]

i've heard that all it takes to reset your ECU is to simply pull the (-) battery, and is the thing to do after a modification of any kind. is this true, what are the affects of not doing so, and does it really matter? the ECU automaticly makes adjustments whenever it detects any change, so why re-set it? tia

btw, are there any mods for my gen 1? its a 1998cc SOHC 16v if that helps at all...

[88 LE]

Just pull the EFI fuse then plug it back in.

No need to disconnect the battery like everyone thinks.

[Ratko]

The only reason to reset to the ECU would be to clear any trouble codes in the ECUs memory.

Otherwise, the ECU is basically always "adjusting" to the airflow and ignition variables that are throw at it (intake flow, exhaust flow, good gas, bad gas, shitty plugs, good plugs...etc). However in the repair manual (at least on an OBD-II car) there is a re-learn procedure that is recommended immediately after the ECU is reset. This is pretty much for a mechanics sake in the case that a customer complains about drivability after their car is returned from service.

[xavior66]

btw, are there any mods for my gen 1? its a 1998cc SOHC 16v if that helps at all...

Take that engine out and throw in a SOHC VTEC clip.

[idrivemyself]

Originally posted by xavior66


Take that engine out and throw in a SOHC VTEC clip.

...and where would i go about finding one of these??

VTEC engines are DOHC...

[idrivemyself]

88 LE: what did you have done to have your engine in prep for the turbo? the engine was the 2.2L right? and what turbo did you end up choosing? a GT-25? something smaller? and what was the performance gains?

[wontonjohnny]

Originally posted by idrivemyself


...and where would i go about finding one of these??

VTEC engines are DOHC...

they do have sohc vtec's
but this is toyota nation so i will say no more...hahah

[boroEF]

Originally posted by idrivemyself


...and where would i go about finding one of these??

VTEC engines are DOHC...

if so then what do u call the d16z6, d16y8........ :p

[idrivemyself]

sorry to those who i've offended with my lack of intelligence... i don't follow honda :p

thanks though

[88 LE]

Originally posted by idrivemyself
88 LE: what did you have done to have your engine in prep for the turbo?

I didn't do anything to the engine. I just put together a custom turbo setup.

Pics of turbo setup:

http://www.imagestation.com/album/?id=4289866795

Pics of turbo:

http://www.imagestation.com/album/?id=4289847905

the engine was the 2.2L right?

2.0L. Its a 3S-FE.

and what turbo did you end up choosing? a GT-25? something smaller?

Garrett / AiResearch T3.

40 trim compressor wheel. .42 A/R (compressor housing).

Standard trim turbine wheel (T3). .48 A/R (turbine housing).

and what was the performance gains?

I'm not sure. It was definitely more powerful then stock and you can feel it pull when the boost comes on (around 2,500 rpm).

It ran good for 2 weeks on 10 psi till the engine blew. Piston #4 melted. So much for that 3S-FE, i'm moving on to better things.

[idrivemyself]

hmm..... thats interesting.... i'm thinking that if i ran a similar setup with a smaller turbo, possibly with a K03 or even a T3 as you did, just set at 8 psi, i might have the gains i was looking for out of this lightweight gen 1....

aprox. what was the total cost and time invested into this before it was almost finialized (can't say completly, the engine did blow...)? the 3S-FE is also an SOHC correct?

thanks for the pics and taking the time to anwser my questions. its greatly appreciated.

[idrivemyself]

btw, you wern't running an ic of any sort???

[88 LE]

Originally posted by idrivemyself
hmm..... thats interesting.... i'm thinking that if i ran a similar setup with a smaller turbo, possibly with a K03 or even a T3 as you did, just set at 8 psi, i might have the gains i was looking for out of this lightweight gen 1....

You can try a Mitsubishi TD-04 or TD-05, but their small turbos. A T3 looks big compared to em.

aprox. what was the total cost and time invested into this before it was almost finialized (can't say completly, the engine did blow...)? the 3S-FE is also an SOHC correct?

Total cost was about $1200.

Time invested was 2 days installing the turbo, making up the lines (stainless steel braided + AN fittings) for the turbo, making up the pipes (downpipe & compressor discharge pipe), test fitting everything, etc...

I also had to make a adapter to use a T3 turbo with the 3S-GTE turbo manifold. This took a few days to make cos I made it at the welding shop at school.

Total time invested was a few months. I did alot of research on turbos before I decided on a T3. I also had to buy all the parts I needed.

The engine blew cos I was running to much boost and the #4 piston melted.



My friends 5S-FE also blew on 10 psi boost. Cracked ring on #3 piston, scoring on cylinder #3 and #4, scoring on skirt of #3 piston, and melted ring lands on #4 piston. Pics at link below:

http://www.imagestation.com/album/?id=4289831115

3S-FE is DOHC. Theres only 1 camgear though (on intake cam). The cams have scissor gears on them and the intake cam drives the exhaust cam through the scissor gears.

[88 LE]

Originally posted by idrivemyself
btw, you wern't running an ic of any sort???

Nope.

I orginally planned on running no more then 6 or 7psi, but the damn spring in the wastegate was to stiff and caused me to see 10psi.

I had plans to install a HKS external wastegate and crank the boost down to 4 or 5 psi, but the engine blew before I got around to it.

[idrivemyself]

its safe to say i won't be running 10 psi...

what turbo was your friend running that made that much damage? a T04E?! it had to have been something much larger than just a T3...

btw, do you have yahoo msger., msn, or aim?

[edit] how many miles were on the 3S-FE when it was turbo'd? the 5S-FE too?