are these gen 4 rods in my 5.3?
04-15-2018, 08:59 AM
#21
Not sure if what you have is gen 4. But here ya go.
https://youtu.be/oPGITRHQ_Bg
https://youtu.be/oPGITRHQ_Bg
Holy Fack! Anyone know any more details on the car? Turbo set up, computer/tuning, etc? It looks like it leaves soft(relative to that 7sec et) than the boost just ramps in like a raped ape. That thing is nasty!!!
04-15-2018, 12:34 PM
#22
Restricted User
Any way to tell if they are pressed or floating pistons without pulling one out? Maybe a part number on the piston? I could have been lied to about the year of the motor too tho.
To the OP, my gen 3 rods have been up to 12psi or about 600hp at the crank with no issues. The big difference between the rods is rpm, gen 3 are safe to 6500ish and gen 4 higher from what I’ve read.
To the OP, my gen 3 rods have been up to 12psi or about 600hp at the crank with no issues. The big difference between the rods is rpm, gen 3 are safe to 6500ish and gen 4 higher from what I’ve read.
You just said you had gen 4 rods, now they're gen 3?
04-15-2018, 01:23 PM
#23
I have two 5.3s. One is a 99 and it’s clearly gen 3 with gen 3 rods. Been up to 6000-6500 and 12psi and no issues. Stock short block and didn’t even gap the rings. My second 5.3 was said to be a 2003 but it has the gen 4 rods (not sure about pistons) which is what I’m building now.
04-15-2018, 05:18 PM
#30
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shes all put back together now and running, but how much better are the gen 4 pistons compared to gen 3? i dont wanna push her past 600wheel if its got weak knees
04-15-2018, 05:27 PM
#31
600whp isn’t that bad. You’ll be fine as long as the tune is safe and u don’t pop a piston. Gen 3 and 4 are the same essentially, one has pressed pins which have there pos and negs and 4th gens had floating pistons which has pros and cons. I wouldn’t be worried about the pistons... it’s the rods where the strength comes from.
04-15-2018, 05:30 PM
#32
yea my 2003 has 4the gen rods, no idea about pistons but also has the 99-04 head bolts that are the $$ compared to all the same length. Happy about the rods tho! Not so happy about the castec 706 heads lol.
04-16-2018, 07:54 AM
#33
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I bought flat top pistons for my Gen 3 5.3.
It turns out that they are Gen 4 pistons and required machining or Gen 4 rods...
Since, I bought Gen 4 rods and everything is fine.
It turns out that they are Gen 4 pistons and required machining or Gen 4 rods...
Since, I bought Gen 4 rods and everything is fine.
04-19-2018, 09:58 AM
#34
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600whp isn’t that bad. You’ll be fine as long as the tune is safe and u don’t pop a piston. Gen 3 and 4 are the same essentially, one has pressed pins which have there pos and negs and 4th gens had floating pistons which has pros and cons. I wouldn’t be worried about the pistons... it’s the rods where the strength comes from.
i definently have a good tuner. good to know tho
