so.....???

 

It should bolt up, I am pretty sure the flanges are the same.

 

why? A couple of sponsers already sell a turbo exhaust manifold.

 

Well I guess you could put the LNF turbo on the LSJ, that would be the only reason for doing so that I can think of

 

I'm waiting for someone to do that. Just to prove how 'not different' these motors perform.

 

I think the direct injection is the big thing with the LNF cars and how easy it is to gain more power with just tuning, otherwise I would say the motors are pretty well the same. A cool swap if at all possible would be an LNF cylinder head onto an LSJ with said manifold. Almost an LNF convesion for us LSJ guys

 

yea i dont imagine there would be much difference in results, the LSJ has the higher compression so its going to make higher power, but the LNF has all the VVT wizardry and cam phasing to soup it up

 

Hmm idk about that.

GM released a DI 2.2 (LAP) version of the 2.2 (L61) and it only gained a little over stock. Now in a full tuned version there would be more gains ofcourse.

LAP 155tq 150hp
http://media.gm.com/us/powertrain/en...Cobalt_LAP.pdf

L61 152tq 148hp
http://media.gm.com/us/powertrain/en...hev_Cobalt.pdf

 

I think while the gains on a N/A will be smaller with DI, I think they would be much higher with a boosted motor (whether it be S/C or T/C), but who knows... I do not know a ton about our motors.

 

That is probably true.

An other problem with slapping an LNF head on an LSJ is controlling the VVT. With the ECU from the LSJ there is no way to control it through HPTs.

 

Direct injection's main purpose is emissions. Yes it's more efficient, but it's main purpose is emissions IMO.

The Turbo and maybe VVT (but I argue thats still emissions related) are what gives the LNF the boost.

Think about it, if the M62 takes ~40-50 HP to drive that right there gives you the extra to put the LSJ into the LNF HP ball park.

 

I agree that emissions will be better in a DI motor but like you said, it is more efficient. This efficiency will help produce more power when tuned (or with a turbo like the LNF more power stock).