i know that the using of the 2.2 crank for a stroker kit has been discussed but the problem is the flywheel bolt patterns...so my question is could a machine shop redrill a stock crank by filling the stock holes and redrilling the correct pattern like they do with wheels?...also how far overbored can we go on the stock sleeves?

 

you dont overbore these motors much, the most ive hear of being made is .020" over pistons. you can install darton sleeves and go bigger.

as for the 2.2l crank, hard to say. im sure you could run a 2.2l flywheel and pressure plate with a 2.0l disk. also need to remember that the 06 and earlier 2.2l cranks have the 7x reluctor wheel, the 2.0l and 2.4 have a 58x.

 

i really want to increase the displacement of the LSJ when i build the block up

 

not sure if anything has been discussed regarding the 2.4l crank and such. i havent looked into the 2.4l at all so no clue on anything involving it.

 

im sure if you talk to the right people, and have enough cash, anything is possible. custom stuff is made everyday. and if you can do it, i say more power to ya, it would be a first. good luck

 

Highest I would suggest would be 91x91mm. Thats a 0.200" overbore and stroke. Would net you about 2.4L of displacement, but you need to make sure you build up the engine to do that.

 

or just build an LE5 block??? i wouldn't go 91mm on stock sleeves. to go that big your going to need aftermarket sleeves

 

Sorry, I wasn't suggesting 91mm on stock sleeves. What I was trying to say is that 91x91mm is the highest I would move the engine to even after building it up. It would give you 2.373L of displacement to be exact, what all the car makers would call 2.4L.

 

Why would you want to? 86x86 is square bore/stroke and the sleeves have plenty of meat to handle power, the storke is nice and short for easy high rpm operation, as well as good torque. GM uses a 2.0-2.1L motor to make 1400+ hp, I'd stick with 2.0L.

 

Has anyone done the Darton sleeves in the 2.0l. I was talking to them and they said the 2.2l ones don't fit in the 2.0l engines. I want to do this and run a 3.500" bore .

 

they "should" fit since all ecotec blocks are the same

 

The other difference between the LSJ crank and the L61 crank is the crankshaft position reluctor ring. The 2.2l L61 crank ring looks like this:



and the LSJ crank looks like this:


The reluctor ring bolts to the LSJ crank, so if you got a 2.2L crak you could machine it off and bolt on the reluctor ring. but this is the job for an engine builder that knows what they are doing.

Eagle says their 2.2L crank cannot be easily machined to take the reluctor ring either.

Here is what GM racing had to say about the cranks:

"Old L61 cranks have a 7x (pulses per rev), casted in. You can't use those, unless you machine it, use the LSJ reluctor wheel and match the index off the LSJ. The more recent L61 have the same 58x reluctor wheel as the LSJ, but we don't think that they are indexed the same. We don't have them here to look at, but you should be able to do that. You'd need to adjust the reluctor wheel on the L61 to match how the LSJ is indexed. We do know that the L61 reluctor wheel is indexed 3.5degrees off the #1 pin.

The Eagle crank is a replacement for the 2.2L L61 crank (similar stroke, same bolt pattern).
"

As for flywheel bolt patterns, this is what SPEC has to say about the issue on using their flywheel at clutch (stage 3) for the LSJ with a 2.2L crank and the F35 transmission

"The SC893F-2 and SC98A should be fine. There is a .210 (two hundred ten thousandths) difference in stackup height, but the 2.2L crank may make up that difference. Check the crank snout/flywheel mounting flange and see if it protrudes further from the block than the 2.0L crank. If not, a spacer can likely be used to make up that difference."

 

what i am talking about would be a complete bolt in product with no machining needing done

 

once again.. talk to fullthrottle on RLF.. he has tackled the issue's reguarding a 2.4 block with a 2.0 head.. and it AINT EASY. and once again most LSJ owner's jus want a #4 piston to stay togther. and as we have spoken on the RLF's this is not a cheap option.. people could do valve spring's, retainer's and diamond piston's for jus the cost of the crank you said would work. 1k atleast for the crank IIRC

 

yep, its just a mod for those who want it...just like the 6 speed swap, for the hassle and the cost is it worth it? but for some people its exactly what they want

 

Not according to Darton they arn't. They said I would have to send them my block it would take 14 weeks for them to get to it and then see what would work.

That is why I was wondering if someone has had them put in their 2.0l yet.

Not according to Darton they arn't. They said I would have to send them my block it would take 14 weeks for them to get to it and then see what would work.

That is why I was wondering if someone has had them put in their 2.0l yet.