Yeah spooner I read that manual too & yes it is a confusing read. I was going through the stock to 250 build & kept wondering why you need to add the supercharger.
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Yeah spooner I read that manual too & yes it is a confusing read. I was going through the stock to 250 build & kept wondering why you need to add the supercharger.
How did that removing the airbox work out for you? Did you notice any difference? I've been considering doing it to my SS.
How did that removing the airbox work out for you? Did you notice any difference? I've been considering doing it to my SS.
Just glad I'm not part of the Busted Knuckle club. That thing was a tad difficult to get out. Now I think I should have left it in to use as a heat shield for the filter. But I did have some MAF problems, which I hope went away. It's been running fine since monday. I don't have access to a dyno, but with the intake it's not as tourquey, & it seems smoother all the way up through the gears.
CONNECTING RODS
We recommend that the connecting rods be upgraded
because stock rods are not designed for power levels over 250 hp.
The 2.0L LSJ ECOTEC engine has forged steel rods similar
to Small Block Chevy “Pink Rod.” The forged steel rods are
made of high quality material and have a cap screw 23 mm
small end, and a full floating bronze bushing. These rods are
available through GM under part number 12755126. These
rods require GM Performance Parts piston set part number
88958634 to work with the stock 2.2L crankshaft.
Alternatively, Eagle and Manley both offer a CNC machined H-Beam rod which is an exact replacement for the stock
2.2L rod. (Fig. 48)
PISTONS
The stock 2.2LECOTEC pistons have been tested to power
levels approaching 300 hp. However these pistons should
be replaced with a stock forged-type piston for applications
over the 300 hp level. JE, Wiseco and Diamond offer pistons
in various compression ratios that work for most
applications. We recommend a compression ratio of 9:1 or
less for blown gas applications, and 10-11:1 for normally
aspirated with premium fuel. GM Performance Parts offers
a stock replacement piston that is a direct drop in when used
with the LSJ connecting rod. (Fig. 49)
As far as I can tell here, there nothing about the engine internals being limited at 350hp, I also heard someone else saying the rods could only handle 300hp, but I think people are confusing the fact that they're building a 2.2 in the book, and not starting with the 2.0 LSJ block and internals.
That totally contradicts this statement from the same book... hmmm... I mean, if the 2.2 can handle 300hp, then it dosen't make much sense that the stronger ones can only handle the same amount.... perhaps it's a typo in the parts list??
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But I did have some MAF problems, which I hope went away. It's been running fine since monday. I don't have access to a dyno, but with the intake it's not as tourquey, & it seems smoother all the way up through the gears.
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