Ok first let me explain, I am building an off road desert rail powered by an EcoTec LSJ. The motor is currently using a Stage II kit and a dual pass heat exchanger with a ZZP intercooler added (think desert, searing heat, running high RPM's a lot of the time). Plans are Port and Polish, step up big on the cams, a CBM kit with the Genesis tune, CBM headers,. JGM will do the build and Jim feels comfortably about 350 HP in final trip.
Anyway to the topic question since there will be no tranny I really do not need a flywheel per say and I will only need the flex plate for the starter since this will be using a QDS CVT system to a RPM F-N-R differential. My question is will the L61or any other EcoTec Flexplate fit the LSJ?
Thanks,
Bob
the LSJ and LNF ecotec engines both use an 8-bolt flywheel/ flex plate.
the L61 and LE5 ecotec engines both use a 6-bolt flywheel/ flex plate.
I KNOW GM racing has used the LSJ with automatic transmissions before, but so far as what they used for the flexplate I do not know.
I know the LSJ never came in automatic, but I am pretty sure the LNF did.. (don't quote me on that)
if it fits the LNF, it should fit the LSJ since they are both have 8 bolt flywheels
The LSJ's and LNF's were GM's forced induction 4 cylinders and they share the same 8 bolt flywheels (unlike the L61 and LE5 wich has a 6 bolt) however i dont believe they came attached to an automatic transmission on any FWD application. Your best bet might be to go with the flexplate from the solstice GXP automatics. I have no idea on clearances from RWD to FWD but i cant imagine GM would do anything tricky there.
There is an automatic LNF application. The HHR SS is available with AT
It beats a Honda!
So cool guys! The reason I ask this is other than the obvious that I already stated the goal is of course to reduce the rotating mass which normally with a shifting tranny one would immediately choose a lighter or machined lightened flywheel which means expense and about the lightest only reduces the mass by about 8 pounds. I would think that a flex plate off one of these babies likely weighs in at less than 8 pounds total. I say this because the flex plate on my stroker motor in my '56 comes in just over this. The next thing is the cost, one would assume they are available fairly cheap say in the under $100 range. I guess I need to research this for a source.
Bob
I can't believe I am having so much trouble finding either the flexplate or a conversion chart that shows some cross reference of part number. Any thoughts or leads guys?
Bob
I would probable call a GM dealership and check to see what the have.
That is if that's going to work for what you need.
Seems like the only choice out there. I have a problem believing this is so tough with how popular this motor is.
There is really no reason why this will not work.
Here is a visual for you guys of the mock up of the CVT mounted to the engine:
Bob
I cant see why it wouldn't work to be honest.
