After hearing about the guy who is going RWD i was thinking of keeping the FWD but changing the engine. My idea was to swap to the L67 v6 SC engine from the pontiac grand prix gtp. I know that equal some serious transmission work but does anyone think that the engine could fit in the cobalt engine bay?

any feedback would be greatly appreciated.

 

my guess is that the trans would not fit, most likely some serious frame modification. find one and take some measurements of the engine

 

from my experience that engine is still slower than most SS unless its seriously modified. Also you are adding a **** load of weight into the SS. I think it would make it slower and off set the weight distribution of the car. IMO youd be better off going tvs.

 

it may be able to be done but its gunna take alot of custom work. like mentioned above the transmission fitment, and custom frame work.

 

if you find and engine and trans put it in the trunk for a mid engine set up. i have been dreaming about doing this with a ford GT40 engine/trans. would make for great "what the heck?!?" moments

 

only if you do some firewall work

 

I agree with the other guys, we used to have a 2000 Boneville SSEI with that engine. I believe it only had 240hp. TVS or Turbo FTW. Only benefit of the V6 would be the exhaust note

 

you would think there would be more room for hp if you swapped and did work to the L67 as opposed to the LSJ...or am i wrong?

 

oh damn put a zr1 engine in the trunk of a cobalt hahaha that would be hella cool.

 

just twin charge your car and make over 360whp..for less trouble/modification...and make more power..

 

Not worth it IMO. The GTP tranny is a POS and cannot handle the torque from that engine. Go turbo instead

 

i have seen people put that same motor in a sunfire. and it fit, but with some work.
sunfre, cavalier, coblat, G5 all about the same size.
i think with some work it would be sick!

 

As stated above just go turbo waay less headaches and as much power as you would need

 

The added weight of the V6 will offset any HP and TQ increase you would see, plus it would be a big pain in the ass electrically and physically getting the V6 in there. You would be better off to just go TVS or turbo, probaqbly cheaper too.

 

talk to a guy on Jbody.org or even here i think, his name is RavenSS. He put a 3800 Supercharged in a Cavy, so if your serious about doing this, hes your man.

 

id be serious just maybe after i graduate next year... the L67 i think has more potential although everyone says the weight distribution would be off.

 

It is a very heavy cast Iron motor, plus it uses a bigger trans.. the front of a cobalt is not designed to handle that much weigh..

 

Bad Swap..

I know personally a person who put the 3800 SC from a Bonneville in a J-Body.

Took a year to do... It is totally Dangerous in the corners and SUCKS Ass for acceleration.

 

Its doable in a Jbody but its not an easy swap.. Theres a lot of fabrication that needs to be done. Ive done ALOT of research on this swap because I may do it in my J eventually, Ive always wanted to.

 

notoriously unreliable! If you do it keep you IATs as cold as possible!! Ive seen 3 with melted pistons! The others are right! Iron block=heavy!

 

as stated, the motor is heavy and would drasticly change the weight balance of the car. the tranny would fit in the car, its a 4t65e-hd, the same tranny the gm fwd race automatic is based off of. it also is heavy. the only upside of this swap is this motor can make some serious power, but you come against the same hurdles as an lsj.

a better swap would be a 3.6l dohc or a 3.9l ohv. the 3.9l is right on par power wise to the 3800s/c, the 3.6 dohc is a bit more power. the 3.6 is a wide motor and would have a hard time getting into the engine bay, however the 3.9l isnt much wider than a fully dressed (blower and exhaust manifold) lsj. this is a more realistic swap. the 3.9l is also a cast block/aluminum heads, its far lighter than a 3800 (however still heavier than an lsj), and has far better flowing heads. its only a turbo setup and meth injection away from 350whp. with a built up bottom end, some mls head gaskets and studs, a nice turbo cam, i can easily see 450hp not working it hard. this engine would mate to a 2000-2002 2.2l ohv getrag 5 speed (its the same f23 in the 2.2/2.4 cobalts, just a different bolt pattern bellhousing), it should bolt right into a cobalt.

 

3800 - flywheel also needs to be machined down to fit the F23.