ecotec swap (Page 22/98)
wftb APR 24, 10:53 PM
the bigger fuel injectors and the aeromotive FPR (it increases fuel pressure as boost goes up) should handle the need for more fuel .i have no way to retard timing right now .i take things in small steps though .i havent watched my boost guage during a 0-60 run but during a throttle roll on, it seems to be building a little more than 8 psi. i will put in the bigger injectors ,do some throttle roll ons and see where the detonation occurs at present boost levels .i think at 8 psi ,i wont have any problems (it doesnt ping that much now ,but i dont want to blow the motor so i have not tried a 1/4 mile run yet .hahn racecraft stage 2 kit includes a 100 psi pump , 6:1 FPR ,and bigger injectors .they said it would easily handle 10 psi .i am hoping that my methanol injection will be the added ingredient to the setup i already have (when the injectors arrive) .it is not hard to control detonation when the engine is only 18 iches behind your ears .you hear it start to knock and you back off the throttle .its always disapointing but then you plan your next step .so far i am happy with my progress .
i only know about hp tuners as a method to control spark timing and injector flow and it is available for the 2004 cavalier ecotec that is in my car .i just dont want to spend that money unless i have to .the hahn racecraft port fueler system is around 2000.00 and it will handle boost levels above 20 psi but then you have to look at what the con rods will handle (i am told 350 hp with a turbo and no nitrous) and i am sure head gaskets will start blowing long before 20 psi .
a piggy back controller might be the answer for spark retard but i dont know what is even available .i will find out what i need on friday ,my injectors should be here thursday.thanks for posting .
BV MotorSports APR 25, 09:11 AM
Get some way to reduce ignition advance under boost and you'd be well on your way to control det. When tuning you want to nail the AFR to a set number (say 11.5-11.8 @ WOT) and then dial in as much ignition advance as the engine will tolerate w/o knock. I'm sure you know if you are running meth or alcohol your wideband will need to be recalculated for stoichiometric.
Dont just count on the ECU's ability for knock control. Most N/A engines converted to forced induction cant react fast enough to prevent damage. My evo has a fantastic knock control system and has saved many a 4G63 from poor tunes. You may want to pick up a knock link because if you can hear knock... its pretty bad.

[This message has been edited by BV MotorSports (edited 04-25-2007).]

wftb APR 27, 03:56 PM
well its friday and the mail came and still no new injectors .so developement work on the motor is stalled for now.i tried to fix my remote trunk release today but that was a nogo too.replaced the switch and it still doesnt work .the solinoid works when i hotwire it .i tried finding the relay that is in this circuit but i ended up with the wrong one .any one know how many wires connect to that relay ,and an exact location?
i wanted to show a few pics of my suspension and brakes .i have the RCC 11" brake kit and coilover kit with tubular a arms in the back and held sport suspension with RCC11" brakes .the pics show the original 8" 260lb springs on the front .i changed to 10" 300lb springs after because i found the 8" springs bottomed out .if you are going with 8" springs in the front you need a spring rate of 400 lbs to stop bottoming out . the car corners very well ,no diving on braking or nose up accelaration .it still jumps around a bit on bumpy roads but most fieros do this as soon as you put on wide tires .



tres are kumho ecstas 205/45/16 front and245/50/16 rears .no snap throttle oversteer problem with this combo .car is very neutral handling .i can induce oversteer with extra throttle .
Bruce APR 30, 12:39 AM
What is (are) the advantage(s) of using the Ecotec engine??
wftb APR 30, 08:46 AM
i can only give you my reasons ,here they are :
it is an in production motor and readily available new or used
state of the art 4 valve dohc design
aluminum block and head with steel liners ,much lighter(100 -125 lbs)than the 2.8
more power than the 2.8 ,even without mods
easily modified to whatever horsepower level you want
use the tranny that it came with and get a complete new drivetrain that is much stronger than anything a fiero came with .

for me ,this has been a fun project that has greatly improved the speed ,handling ,and reliability of the car .it already went pretty fast without the turbo ,but i cant resist seeing how far i can take this car .as far as an all out performance motor ,the new 2.0 turbo motor comes with forged rods ,steel crank ,VVT .but it only comes in the solstice/skye so dont expect to get one at a wreckers soon .the 2.0 supercharged motors have the strong bottom end but no VVT.as far as i know ,the 2.4 motor shares the 2.2's bad points:the powdered metal rods and cast iron crank .to me the extra cost and work involved with this motor is not worth it to just get VVT .it is 177 hp stock ,but a 2.2 is a cold air intake and headers away from that already .
Fosgatecavy98 APR 30, 09:31 PM
I believe the 2.4 has the forged internals but the 2.2 injectors.

I love the ecotec, bascially what WTFB said, this motor is the 350 of its time and can be upgraded to any power level you want.

WTFB, you will love those Kumhos, same as I have but i only have 205s all the way around once those burn up Ill go for 225 or 235 if i can fit em.

As far as mine goes, I am on the final steps of my spacer setup which is very well done So far my entire tranny/drivetrain price is up to $336 dollars plus about 20+ hours on the laythe and mill (dont want to imagine it if a machine shop would be doing the spacer)

Looking hot, you need to try and make the GM-Small Car Bash July 27th, I would love to meet you and see your fiero!
wftb MAY 01, 08:50 AM
i am actually off work that day .is that event any where near detroit?i am three hours away from detroit .got my bigger injectors today . the stock harness does not fit the accell injectors .the clips fit though and length is fine .i am making a temporary harness setup so i can run until i can find a made up harness .cobalt addiction has one for 49.00 i think it should be the same as a cavalier but i have to phone and confirm .
another ecotec advantage is it only takes 10 minutes to remove the fuel rail and injectors .try that on a 2.8 ,you are in for an afternoon's work .
Fosgatecavy98 MAY 01, 02:56 PM
Hmm for some reason I thought you where no where near Michigan. Its in Mansfield Ohio, your closer to it than me lol. Im going to be spending the weekend down there, sinces its a huge party!

I was given 3 different 2.2 ecotec fuel rails and every single one of them is different so dont be to sure that the wiring is the same.
wftb MAY 01, 08:06 PM
my home made harness is working perfectly so i think i will just save the 50 bucks .i am north of detroit so mansfield will be to far cause i have to work the next day .i want to take this car to a fiero related event this year but the dates dont match up with work much so far .i installed the new injectors ,added a cherry bomb muffler and i got some hydraulic return line to replace the heater hose i have been using as a oil return line .the car is noticeably queter now and i almost have the detonation solved .if i can up the fuel pressure another 5 psi (at 60psi now ,stock was 56 iirc ).i am raising it a bit at a time so i dont get to a flooding situation .the detonation starts at 5500 in third gear now but i think if i do a standing start run with the water meth flowing full on i might be able to do a quarter mile run .pics later .
Fosgatecavy98 MAY 01, 08:51 PM
You gotta try and get that weekend off! Its going to be a blast. There is also a NOPI event at Milian this year and a few others at US131 which is South of Grand Rapids. I plan on making as much as I can.

Get some videos if you can or some action shots

Does it sound good with a cherry bomb? I have one left over from my 3800 and I also have a Dynamax muffler, I can choose outta those too. Either way I cannot wait to see more pics.

The spacer is finished, and I commence putting it all back together, the clutch works much easier that it did with my 3800. Also I suggest if you can get a Fidanza Lightweight flywheel for yours, its saweet!