Unsure of the boost I'll be pushing, or what I'm doing about fuel. I know the LSJ head doesn't have a power steering provision, so that would have to be addressed.īut I would say there's a 70% chance that my first turbo engine will be an LSJ block with forged rods from JBP, wiseco pistons with ceramic coated crowns in a pretty low compression ratio, and a header style turbo manifold with a GT35R/GT30R hybrid ball bearing turbo. it all depends on what difficulties lie ahead. Then there's also just an outright swap to the 2.0. I was thinking of putting the LSJ block under the L61 patriot head The engineering advantages of the LSJ make it worth while to look into some sort of hybrid of the L61 and the LSJ. I may do up another all motor 2.2 in the future on my daily (looking for an 03-05 jbody base model 5 speed) but for now the skwirl's going big time boost. Its a great idea, but I'd like to keep my engine under the hood, and having the throttles exposed pretty far beyond the hood wouldn't be too cool on the street or parking it somewheres. Most ITB kits sold by TWM induction or other ITB companies have 50mm throttle bodies and larger.īasically, for all the trouble, unless its going on to a higher revving motor, it isn't really worth it. which is fine and dandy, but I'd almost be willing to bet this is too small for our engines. I'm not cracking open the motor unless I'm going boost.Īlso, the hayabusa 1300cc motorcycle throttle bodies are 44mm at the mouth and taper to 40mm or so by the rear. and to safely do that I need forged internals. In order to bring the runner length down, RPM has to go up. The ITBs are a good idea, however for such a low redline (7500ish, possibly 8000rpm) the runner length would have to be so long, they would stick out beyond the hood of the car. I wouldn't doubt if someone swaps an LSJ into a Jbody soon I know its been attempted before. this is the only detail I'm a bit worried about. Unless the Cobalt SS clutch works with the Jbody transmission. I'm hoping for the Jbody clutch to bolt up to the LSJ flywheel if not, I'm going to have to try and get a custom flywheel made to fit the LSJ crank but accept jbody clutches. So using a jbody flywheel is out of the question. I know the LSJ has an 8 bolt flywheel while the L61 has a 6 bolt. it'll think its an L61.Ģ) clutch and flywheel. So if you use the L61 fuel rail, ignition module, and wirirng harness the car won't know any different and won't care what engine is working. the LSJ is a cobalt only engine, and their electrical system is different than in the 3rd gen 2nd phase(00-02) and 3rd phase(03-05) jbody.
I think you would have to use the L61 ignition module, and the L61 wiring harness with some of the LSJ sensors. The stage is set since the LSJ is basically a revised and strengthened L61.ġ) electronics. Also, the head on the LSJ is sand cast, and has structural reinforcements to prevent the outward sections of the number 1 and number 4 cylinders blowing the headgasket out under high boost. The LSJ has a smaller stroke, making it stable at higher RPM, and also comes with piston squirters that spray the bottom of the pistons with oil to help keep them cool and resist detonation. No reason the LSJ wouldn't bolt into the Jbody, since the L61 and the LSJ are almost identical structure wise. I wouldn't suggest you doing this swap since you're not mechanically inclined, nor have the money but if anyone cares to know.
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