Galaxie500XL Posted February 10, 2011 Report Share Posted February 10, 2011 (edited) Off the wall question here...was doodling a bit, and wondered if GM ever produced a crankshaft for the 60-degree V6 with a longer stroke than 3.3 inches that would fit in an LQ1... It occurred to me that if you could find a longer stroke crank, you could take better advantage of the DOHC layout, and fill those cylinders pretty well, in addition to increasing displacement a bit. You'd lose a bit of the high-end power, (and lower the redline) but improve low-to midrange torque. Probably a crazy idea, but what do you think? Edited February 10, 2011 by Galaxie500XL Quote Link to comment Share on other sites More sharing options...
Jonpro03 Posted February 10, 2011 Report Share Posted February 10, 2011 No not really. I think the new DOHC 3600 is 3.37in but that's all I can think of. Quote Link to comment Share on other sites More sharing options...
Crazy K Posted February 10, 2011 Report Share Posted February 10, 2011 interesting thought... but I imagine that doing so would push the engine into interference territory... and as I recall, the pistons don't really have any further room to move up. This might require pistons that have a lower deck height or shorter rods.... Quote Link to comment Share on other sites More sharing options...
Galaxie500XL Posted February 10, 2011 Author Report Share Posted February 10, 2011 I was thinking the same thing. Most likely, deck height would be an issue, particularly since the LQ1 pistons already have reliefs cut into them for valve clearance. I realize what I'm asking probably isn't available or possible given the dearth of available aftermarket parts, but though it was worth a "what if". Quote Link to comment Share on other sites More sharing options...
Galaxie500XL Posted February 10, 2011 Author Report Share Posted February 10, 2011 The engine is slightly oversquare, with a bore/stroke ratio of 1.095...I was thinking somewhere in the range of 3.5-3.6 inches for stroke, but I'd bet since the LQ1/3.1 stroke was already increased to 3.3, compared to the 2.8 (3 inches), that might be as far as they could go without clearance issues from the crank. Quote Link to comment Share on other sites More sharing options...
BXX Posted February 10, 2011 Report Share Posted February 10, 2011 Much more stroke and the piston will fricken fall outta the cylinder:lol: And you'll change the powerband a little too much to the lower end and end up with heads designed for top end flow. Bad things happen at this point. Quote Link to comment Share on other sites More sharing options...
GOT2B GM Posted February 10, 2011 Report Share Posted February 10, 2011 (edited) The pistons ALREADY have valve reliefs machined into them from the factory. What more do you want? Want more power from a LQ1? Boost. Edited February 10, 2011 by GOT2B GM Quote Link to comment Share on other sites More sharing options...
Andrew Posted February 11, 2011 Report Share Posted February 11, 2011 the LQ1 top end tapers off fast enough as it is! Quote Link to comment Share on other sites More sharing options...
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