Flutter Under Acceleration

[Russellmag]

Has anyone had flutter under acceleration? Last fall I installed the BDDL and had my TST on 1x1. Well after running it around for 5 min there was a very distinct flutter sound under the hood. It sounded like a piece of plastic flapping under the hood. Well I took the DL off and took it in, and come to find out I blew a headgasket. So I have the head decked and throw if back on-no problems with TST. Well I have been hearing that the PPE and TST is a great stack. So I put the PPE on and sure enough I get the same sound??? I took the PPE off and no more flutter??? Anyone have any Idea's???????



Thanks, JR