ecotec swap (Page 54/98)
wftb APR 06, 11:36 PM
one thing that has been bugging me since i got the engine to run is that i could not get the car to idle on its own .i tried everything i could think of but got no where finally i thought about what i had changed and removed the IAC valve .when i did this once before and started the car , the revs hit the roof and i shut it down a second after i started it .this time , the car did not even start .turns out the 2.4 L intake kit is only meant for engines with DBW throttle bodies .so i drilled an extra hole to give the IAC valve a way to feed some air in so the car can idle without me sitting with my foot on the throttle .the gasket and adapter plate for the kit completely block the IAC airpath .here is the fix :

some pics of my new charge piping .not the way i had planned it .i had to modify things because of having to use the old thermostat housing .the outlets were in the way .


[This message has been edited by wftb (edited 12-10-2017).]

wftb APR 11, 06:22 PM
i have the car back on the road but i have some problems . the controller for my water meth injection died and the power feed for my intercooler fan and pump has gone dead on me .i have a new controller on order and also ordered a simple boost pressure switch to use as a backup .fixing the power feed wont be a problem but i am working nights and i dont have time to tear in to it .the car was running well ,no oil burning and nice and quiet from the valve train .never went above 4 psi boost or 3000 rpm's so i dont know how much better it is power wise .my new parts should be here by thursday so i will fix everything then .cant drive it without the intercooler , so it sits till then .
hidden exhaust , just tips showing:

got the vents on and hid some of the heater / turbo plumbing

i really need a paint job done
wftb APR 14, 04:55 AM
got my power feed for the intercooler fan and pump fixed so i am on the road again .still waiting on my new water meth controller .i clicked on the UPS expidited delivery on summit racing's online store and that sent my order to customer service never never land for some reason and 3 days after ordering i am still waiting for them to ship . i should have just picked standard shipping , would probably be here by now .cant really see what it will do performance wise until i get the water meth working again .
wftb APR 21, 11:27 PM
running the car again and it feels really strong .i got rid of my AEM guage boost controller because i never got it to work anyway and it quit along with a lot of other stuff when i started having problems with old crimp together connections .i have spent the last week getting rid of crimps and making solder joints and now everything is working again .new water meth controller is installed and i took it up to 5500 rpm with no problems .the boost gauge says i am maxing out at 6 psi so i may need a stiffer waste gate spring .
doublec4 APR 21, 11:49 PM
Looks like its coming along nicely

Good to see somebody go the ecotec route and boost it too. Very innovative
wftb APR 22, 01:57 PM
thanks for the reply .i have now got about 600 km on it .i have yet to really let it rip , going to wait till i go over 1000 km .i really hate opening engines up .i am a little paranoid about making a mistake .the one thing that concerns me is always the conn rod bolts .the rods came with arp bolts and i followed the instructions to the letter .came with thread lube that arp insists must be used and specified a torque of 43 ft lbs .i checked the torque three times and all was good .but i kept wondering about 43 ft lbs .i went on the ecotec forum and was happy to find that the danger on these rods is usually from over torquing .so i left it as is and everything seems to be good .this motor behaves differently than my old motor , the 20 g does not pull as well in top gear at low revs as the 16g did .but everywhere else it is stronger , even at only 6psi .it must move a lot more air .
FieroFiend APR 24, 06:21 PM
The 20g is awesome, it only took 12 psi from it to get our ecotec to 340whp with stock cams and compression would love to see what you make when you crank it up.
wftb APR 25, 10:43 PM
i ran a couple of HP tuners scans and it looks like i need to move to bigger injectors , probably around 42 lbs .getting a little more knock reduction than i would like .nothing terrible ,worst is about 7.6 degrees during top gear low rpm open throttle situations .i had 0 KR with the old turbo , so i am getting bigger injectors before i turn up the boost .
FieroFiend APR 26, 08:56 PM
Its to bad that the hahn port fueler probably would not fit at all its such a nice set up very easy to tune with it and hp tuners combined.
wftb APR 26, 11:43 PM
actually it will fit , i just have spent too much money on the fiero this winter .Hahn also sells a package with 60 lb injectors , harness and an ECM reflash for 399.00 .i dont know if i can still use my HP tuners after that and i would be without my car for about two weeks .but i have wanted a port fueler for a long time .