LQ4...............408 or not?!
09-23-2010, 11:10 AM
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LQ4...............408 or not?! Ive got an LQ4 im building up for a hot rod and im wondering what your guys opinion is on stroking it to a 408. The motor needs a full rebuild and bore anyway, so the machining costs either way or negligible. From what I can tell, the 408 kit will cost me in the range of $2000 for crank, rods, and pistons. Or I could just keep the stock crank and rods and go with forged pistons with a stock stroke. How much extra HP is gained from the 408 stroker? Would I be better off just going with the stock LQ4 bottom end (with forged pistons) and maybe mill my 317's down for higher compression? Or maybe instead go to FI? I dont mind spending money on this motor as Ill be keeping the car forever, However, if the 408 isnt worth the money, then I will just go with stock LQ4 internals.
On a side note...the motor is from a high mileage truck. Will the mileage affect the strength of the rods? Is it worth replacing them and going forged if I dont go with the 408?
On a side note...the motor is from a high mileage truck. Will the mileage affect the strength of the rods? Is it worth replacing them and going forged if I dont go with the 408?
09-23-2010, 11:24 AM
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Definetly a thumbs up for the 408, more cubes equals more power. Deffinetly go fuel injection. Carbs are great but this is the 21st century utilize current technology.
09-23-2010, 11:40 AM
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09-24-2010, 12:47 PM
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if money isnt problem,,then damn! 408!! for sure.. like he said you'll be wanting it later..then you have bullet prove bottom end for what ever u want to do later.. and ur gonna love a boosted lsx motor!! .. if it was me.408 and 88mm turbo never look back,, 800+ hp... gonna have a stout drive train to handle that?.. haha
09-24-2010, 12:50 PM
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if ur gonna do a 370 set up.. keep the stock crank,,forged pistons..why not go ahead and buy forged rods..dont make sense to me not to get forged rods.. ?.. 300 bucks or so for them.
