Hit the old 5.3 with 20+psi
#12
Exactly how I wanted to respond that that post. Beat me to it.
Wow, that sucks man. Good job finding the problem. This could have easily turned into a trashed motor. Have you checked to see if anything made its way into the gate?
Ok so I went out to the shop to pull the gate off and this is what I found!! I have a 1.5'' flex pipe between the downpipe and wategate the flex liner collapsed resulting in a 3/4'' diameter hole for the gate to dump through.Solid liners are a must on any part of the hot pipes even the gate dump. 20psi with a walbro 255 I wont try it again.
pics to come!
pics to come!Thread
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Choda
MULTIMEDIA (truck related)
12
Jan 22, 2026 02:03 PM






The flex coupling was after the gate and none of it came apart. Silly me I thought these were just a no no on the crossover,high egt's is what gets them not velocity.
