Fairmont 2.0 (forged lq4, s480, 800whp, under new management)
11-11-2012, 09:41 PM
#1287
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Ok so ive been searching for a set of 317's (cant find any for a reasonable price) and learned that 5.3 has the same crank as the 6.0 does that mean the rod and pistons are the only difference in rotating assembley?
11-11-2012, 09:44 PM
#1288
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The 5.3-6.2 all have the same stroke so yes a 5.3 and 6.0 have the same cranks and rods iirc. 6.0 just has a bigger piston. The 5.3 and 4.8 are the same bore but different stroke. Now the 05+ 5.3's and possibly 6.0's have the LS2 style rods and those are stronger than the older LS1 style rods.
11-11-2012, 10:11 PM
#1290
The 5.3-6.2 all have the same stroke so yes a 5.3 and 6.0 have the same cranks and rods iirc. 6.0 just has a bigger piston. The 5.3 and 4.8 are the same bore but different stroke. Now the 05+ 5.3's and possibly 6.0's have the LS2 style rods and those are stronger than the older LS1 style rods.
11-12-2012, 08:19 PM
#1292
exciting to finally tear this motor down and check out what i believed the ring-lands to have butted and broken some ring-lands. to prove this we would have to see spotless pistons and broken lands only.
its nice to see we tore it apart and found exactly that, broken lower lands, from butting and perfect piston tops, people are also right about gen3 rods bending at 650+ because every single one of my rods is bent slightly lol. it seems like the rod is heaver material wise on the one side and thats the side they bend towards, hard to explain but they all bent around equally in the same direction bowing out in the center twoards the flexplate, rear or the motor.
should get my gen4 rods and pistons tomorrow and ill be opening up the gap on the rings and throwing them in.
it was neat to see, since pistons 1-3 broke, we checked the gap on them and they were like 18-19, then checking the gap on the other pistons that did not break, some were 24... just re confirming what people say about when you are pushing them you need to open the ring gap, but honestly it took bending the rods to break a ringland on this gen3. so i would say 600 is your limit probably might even be slightly bending rods at that power level.
its nice to see we tore it apart and found exactly that, broken lower lands, from butting and perfect piston tops, people are also right about gen3 rods bending at 650+ because every single one of my rods is bent slightly lol. it seems like the rod is heaver material wise on the one side and thats the side they bend towards, hard to explain but they all bent around equally in the same direction bowing out in the center twoards the flexplate, rear or the motor.
should get my gen4 rods and pistons tomorrow and ill be opening up the gap on the rings and throwing them in.
it was neat to see, since pistons 1-3 broke, we checked the gap on them and they were like 18-19, then checking the gap on the other pistons that did not break, some were 24... just re confirming what people say about when you are pushing them you need to open the ring gap, but honestly it took bending the rods to break a ringland on this gen3. so i would say 600 is your limit probably might even be slightly bending rods at that power level.
11-12-2012, 08:53 PM
#1297
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Matt, man that mtr of your had to be making the same noise my pony is dang you so are the cylinder bores wasted? The tracks up there are still open ... mines been closed for like 2 months