ecotec swap (Page 27/98)
Eau_Rouge JUL 29, 10:56 AM
Wftb, just curious, do you have any updated performance numbers for your setup?
Horsepower, acceleration etc.

Also, I understand from the cobalt forums that you can swap a non vvt ecotec head onto a 2.4L ecotec as long as you use the 2.4L head gasket. Do you know anything about that?
wftb JUL 29, 05:22 PM
i havent looked into a v v t head swap but everything is interchangeable as far as i know. you would have to get the v v t ECM and adapt the drive by wire stuff .if i were to do that ,i think i would just get the whole engine .
i never managed to get to the dragstrip ,so my best 1/4 is still 14.1@98.6 mph on the g-tech .with all the furor over some very irresponsible street racers that have cost people their lives up here ,i no longer keep the g-tech in the car .it would cause too many questions if i got pulled over .
best hp on g-tech has been 189 at the wheels .
i still hope to get to grand bend dragway to get a slip on it ,but g-tech numbers are very close to actual dragstrip timing .i read nothing but good things about it in the car & driver magazine test .
wftb AUG 06, 11:55 PM
i have been following along in a thread about how fast a fiero will go so i thought i would take my fiero out to a recently paved mostly uninhabited road and see what it would do .i brought my garmin foretex gps to record the actual speed .well ,i got up to 180 kmh(about 112 mph) and the engine bogged .tried it with less throttle ,thinking the blow off valve was letting go ,same thing happens .apparently the ecm from the 2004 cavalier that i am using has a speed governor on it .so unless i buy the hp tuners software ,i wont know what it will do .it pulls really strong right up till the cutoff happens .
Korupt AUG 08, 03:52 AM
I know on the S10 completely different beast i know but the wire that controls the odometer purple wire on my truck. People extend the wires and put a switch in the middle so when racing can turn off the govenor but it also shuts down your odometer. May try jbody.org see if something similar for the ecotec
Fosgatecavy98 AUG 08, 10:47 AM
WTFB, try getting rid of the connection to the VSS sensor to the ecm, we used to do this on some of the cavailers we had doing over 108 in the quarter mile. I dont think they ever did it but we were running nitrious and didnt wanna have the limiter hit under nitrious, it wouldnt of been pretty
wftb AUG 08, 11:08 AM
thanks for the tips guys .i am going to just leave it alone for now .i figure if i can get it to do 180kmh in the 1/4 i should be in the low 13's anyay and i would be happy with that .i guess gm figured a 4 door cavalier wouldnt be very stable beyond that speed .
fieroturbo AUG 09, 11:55 PM
This is why I didn't want the factory ECM (hehe).

Some stuff isn't interchangable with the VVT head. To my knowledge it's a direct injection head, so the manifolds are different, and if the throttle bodies are different, then it would be harder to adapt the drive by wire. Yet another reason I used the ho-hum 2.2L. It's sooo much easier to mod.

If one could get around the throttle by wire issue, the rest of the 2.4L VVT motor would work with Megasquirt. You can program one of the extra outputs to trigger the VVT at any RPM/TPS level. Pretty sure it works with Honda VTEC motors.

One more thing WFTB. I posted a question to the forum about the throttle cable, asking if the pedal side of your cable year would work on an 88, cause one side is shorter on the earlier years, but I don't know if it's the engine side or the pedal side. It's so confusing.

Hope all keeps going well with your project man!

------------------
Petty Officer Michael C Casaceli
Aircraft Electronics Technician Second Class
AIMD Brunswick (2007-present)
Patrol Squadron Ten (2003-2007)
United States Navy

Austrian Import AUG 10, 01:51 AM

quote
Originally posted by wftb:

the turbo solstice is a 2.0 litre motor ,not a 2.4 i dont know if it has V V T.



Now that would be a sweet motor to put into a Fiero. - together with a F35 (I believe) transverse tranny. I think that's the 6-speed manual.
wftb AUG 10, 10:55 AM
the f35 is a heavier duty 5 speed that also comes with the supercharged 2.0 motor .it has an intermediate shaft and to make it work in a fiero you have to use the complete cobalt axle assembly .this is what would make the supercharged motor an easier swap if you had a wrecked cobalt .so far the turbo motor is only in the sky and solstice and since they are rear drive you have a lot of parts hunting to do even if you are lucky enough to find one .
i really dont care for any eco other than the 2.2 .it is the biggest bang for the buck ,it has its drawbacks(weak rods) but it will still put out up to 350 hp without breaking .and if i do break it ,i can get another one for 350.00 .
Austrian Import AUG 10, 12:56 PM

quote
Originally posted by wftb:

the f35 is a heavier duty 5 speed that also comes with the supercharged 2.0 motor .it has an intermediate shaft and to make it work in a fiero you have to use the complete cobalt axle assembly .this is what would make the supercharged motor an easier swap if you had a wrecked cobalt .so far the turbo motor is only in the sky and solstice and since they are rear drive you have a lot of parts hunting to do even if you are lucky enough to find one .
i really dont care for any eco other than the 2.2 .it is the biggest bang for the buck ,it has its drawbacks(weak rods) but it will still put out up to 350 hp without breaking .and if i do break it ,i can get another one for 350.00 .



Good point. I'm waiting for the Saab with the turbocharged engine to come out. That one will be fwd (I think) and the same engine. Now the chances of finding one of those at a junkyard are practically nill, but one can dream, right? :dreaming:

I was thinking about finding a supercharged cobalt engine. (doesn't that one have an optional LSD in some trims?) It would be a dream fit for the fiero, but there is just something about the sound of a turbo spooling up and a BOV whistle that makes me spine tingle..

-M