Retrofitting an sr20 to run gm electrics/ecu

[Infinite]

you guys may think im crazy... but..
hear me out

alot of guys have done things similar, like modifying motors to run a honda distributor to use their ecu's (given the cheap software to tune)

now, the reason im thinking about this is because GM has one ecu for all of their cars.
i have been tuning my dad's z06 and the ecu even has support for superchargers and turbo's (even has a boost controller built in)

everythign from the cobalt to the z06 uses the same ecu...

now, with the sr20. all i would need to do is rewire the ecu to the motor.
using all gm sensors and crank trigger setup ( i already have the sensors from my honda motor)

so all that would be needed is to modify the crank pulley for a hall effect sensor..

the software we use is hp tuners... its basically a stock ecu crack.. imagine hondata from hell. www.hptuners.com

we have made over 100whp from tuning on the z06... you can tune every aspect of the car with this software.


i think this would be a semi cost effective opportunity considering the following

aem ems - 1200 (average)

the gm setup

cobalt ecu - 60
custom harness - 200-250
sensors - free
crank trigger setup - unknown at this point, not too expensive if someone has a waterjet and a welder

jp tuners - single license copy of the software with tuning cables and such - 499

but i already have the software so i just need the license rights for another car... 100 bucks


and even with the power fc, you are limited, you need the ecu plus the datalogit software which easily amounts to aem prices.


like i said, this is just a theory. i need to do a bit more research. but its definitely possible

[shawn shawn]

Props!

[Infinite]

hehe

thinking outside the box is fun

all you need are really the following

gm 3 bar map sensor
gm coolant temp sensor
gm air temp sensor
gm hall effect sensor and a steel crank trigger wheel (with the proper pattern of course)

the hardest part is getting the gauges to work...
i'd probably need to use an oscilloscope on the ecu outputs to figure out what the speedo wanted to see...
the tach would just need a translator, like the autometer one.


and thats basically it... just fitting it all onto the motor and making it work

[RHDS13]

go for it I know what you mean about the ecu and hptuner my friends cobalt when we got it tuned you can tune almost everything with the engine its amazing go for it 100%

[Infinite]

yea, the software is amazing.
and it doesnt tune like you think.

you dont adjust fuel maps

all you do is tell the ecu what a/f you want at what rpm point and open or closed loop
and it self tunes from there
considering motors dont make any real power from fuel maps, all the power is in the ignition maps

and hp tuners lets you adjust ign. timing... but its really cool software. one day i'll see if i can bring the car to the next meet and let you guys see it

oh, and you would need a gm knock sensor.

[Decker]

try it man. Sounds like a sweet idea ...

[Infinite]

i am.
like i said, its just an idea as of now...
but it is definitely do-able

i just need to track down a new cobalt ss and fiddle with it. a friend of my family is the gm rep for the southeast, so i may see if i can snag one for a few days.

the hardest part is the crank trigger really, its gonna take machine work, fab time, etc.

[Decker]

you know what's funny? We have an SR with a custom made 'crank trigger' and bracket for a CAS sitting in one of our shop cars right now :ninja:

[Infinite]

hrmm?
gimme gimme

*begs*

[Decker]

that'll be ... elevendybillion dollars kind sir.

:wave:

[Infinite]

lol

it appears that the cobalt uses a reluctor wheel... imagine an abs sensor ring.

i dont know if this can be scaled or not. some people call it a 60-2 gm calls it a 58x, they are two different things..
hrmm

[Casey]

ive seen people do this with different setups.

cobalt ecu would be great given that its already a 4banger :)

and thats how gm keeps costs down.
same with alot of computer chips.

companies started making chips that could do thousands of things instead of 1 application
aka 1 chip to do calculator functions, be it scientific, graphing, or plain old simple ones.

cheaper in the end to produce.

good luck man its a good idea.
seems a bit complicated.
but for your project car it would be great :)

[Zippy69]

Do it. Make it work, and sell it to me cheap.

[hellfire]

that'll be ... elevendybillion dollars kind sir.

:wave:

Nah, I'll take tenillion.

Tyler

[homeslicej2]

This sounds like a great DIY. I hope it works out. Keep us posted.

[Nick Jeezy]

you come up with the craziest ideas. but i think it will work. gm stuff is some much easier to work with.

[JTA021]

awesome idea man! reps!

[Z-Bryan]

direct exhaust injection

[Casey]

direct exhaust injection

are you saying it wont work?

lol....

motors are very simple things.

stupid people made them

even stupider people can grasp the concept of them

[homeslicej2]

^lol true


direct exhaust injectionhahaha.

[TurboNegro]

go for it

[BlackMage]

Sounds like a wicked idea man. With enough electronics knowhow anything is possible. You should see some of the stuff people have done by reprogramming the stock DSM ECUs to do things like run map sensors off them. But unlike the DSM ECUs I'm sure the newer GM ones have a lot more processing power.

[icantdrift]

i came up with idea quite a while ago and even started mapping a modified wiring harness using the LS1 ECU and harness. gave up on it for various reasons, but it's certainly doable with enough time into it. once the prototype is made it's not terribly hard to reproduce and i'm sure it would be a killer option for those wanting standalone for roughly half the price of an AEM.

[chituntang]

There is a thread in zilvia about CA engine using other auto maker's ecu (Ford or GM, cannot remember). Anyways, give it a shot!!! I want to see what different setup, away from standalone can do.

[SixSquared]

do an LS1 swap and you get a GM ECU, too.... just saying.

[Z U L8R]

muwhahaha halls effect sensor. why not retrofit a gm distributor where an sr20's cam angle sensor goes....using the sr gear on the gm shaft...a little bit of fab work but you could run an hei malory or what not distributor hMMMMMmmm ^_^

but then you go and spend a fortune on r&d to get gm parts on ur stuff, and when it's done they say "why didn't u just put a gm motor in there?" and had almost 3 times the displacement......1400rwhp twin turbo ls7 :D ......or you could just throw some nitrous on it, grow a mullet, and do the rick flair WOOOOOOOOOOOOOOOOOOOOOOOOOO!!!!

[spinin13]

Dude your nuts

[Infinite]

heh, carbs are for corolla owners and mullet loving rednecks.
lol
my rhd coupe is getting the sr20
im trying to pick up a hatch and put an rb20 in it
and then i may pick up a coupe and put a v-8 in it. dunno

[SixSquared]

don't hate on carbed motors :P

[Z U L8R]

carb hrmmm ^.-

fj20 ^.-

^_^

[Bewst Pewp]

crazy shit man...

CHEVY FTW!!!

[icantdrift]

muwhahaha halls effect sensor. why not retrofit a gm distributor where an sr20's cam angle sensor goes....using the sr gear on the gm shaft...a little bit of fab work but you could run an hei malory or what not distributor hMMMMMmmm ^_^



it would be far easier to attach the reluctor wheel from a dead GM crank with a bracket for the sensor on the crank pulley of the SR.