hello. i'm thinking about doing a motor swap on my 02' sunfire GT 2.4 to ecotec which i plan to build up to the 300hp mark or so. was wondering about a donor car and would it be worth it to look for a gt sunfire/cavalier ecotec or just go with a base cobalt ecotec. i downloaded and printed out the sport compact ecotec build book. it's pretty impressive what this little motor can handle. what is the difference between these 2 ecotec engines and why do they vary in power. pcm? i'm planning to run the hahn stage II but they say it comes with an FMU. pistons, rods, and cam-gears will have to be changed. this is the plan (a long term one) and i'd like to get pointed in the right direction. I was also wondering if anyone knew the cost on he Hahn system...
It'll be cheaper and easier for you to find an Jbody (2003-2005) in a junk yard than a Cobalt...plus the fact that they use a totally different PCM and electrical system (from what I understand).
Motor wise, 2.2 to 2.2, there is no difference.
Also, the Cobalts use an electronic throttle body and are returnless stock, jbodies use an mechanical throttle body and have a return fuel system...so that's something to think about as well as far as differences.
Overall, get a Jbody.
Why do they vary in power? More than like differences in computer perameters or something of that nature but I could honestly not answer that for you. I mean, it's a 5 HP increase (crank)...very small.
For prices on the Hahn system, you can contact Ryne @ Team Vision Racing (www.ryne.com/storefront/) and he can get you a price on the Hahn Stage II kit.
If you need anymore help, you can contact myself or even join the forum thats in my signature. Good luck w/everything.
www.kronosperformance.com / 732-742-8837
thanks much... i really appreciate all the info. like what you've done with your ride.
HRC kit is running about 3495-3895 these days. Might go on sale for the holidays though.
Don't EVER have to change cam gears. Absolutely no need.
I used to race cars, now I race myself.
5K PB: 24:50
10K PB: 54:26
Raj R. wrote:thanks much... i really appreciate all the info. like what you've done with your ride.
Thanks but I actually don't have it anymore.
If you need anymore help, you can always reach me and Ryne @ ecotecforum.com
www.kronosperformance.com / 732-742-8837
