Thread: Took my 04 to the dyno yesterday

Originally Posted by GTPpower

That's what I did on this car as well. It's at stock idle now...which reminds me. I had intended to raise it about 100rpms. Maybe the gear you got had some defect to it, that it caused problems.

Could be...who knows...when I get home, I'll post the PB vids I've got of it when the front cover got ripped off to look at the clattering noise.

Originally Posted by GTPpower

I ran LS6's on my 01 for about 10k miles as well, before swapping over to 130's. So, there's about 20k on the chain and dampner total...maybe just a little more. It'll be interesting to see how it looks when I pull it apart. I have idle on there turned up maybe 100rpms as well, iirc.

Yeah, I was running Manley 130's with Ti Retainers...had O/R pushrods with stock rockers. I know the Thrasher is slightly larger lift wise than the XPZ...you got a cam card for it by chance?

Originally Posted by GTPpower

There are a few different dampners that are available for these motors, and I don't have too much research done on them, but it looks like some are better than others. Actual GM dampners may possibly be better. Just about every Cloyes dampner in a motor that I pull apart is broken.

Not sure on the Cloyes ones...

I ran an actual GM one...tossed it in there with the stock timing chain at the time of the XP install. Someone needs to machine a billet dampner, maybe that would help? I also didn't know there were "other options", unless you were just meaning different brands/producers?

Originally Posted by blueguy

Yeah, I was running Manley 130's with Ti Retainers...had O/R pushrods with stock rockers. I know the Thrasher is slightly larger lift wise than the XPZ...you got a cam card for it by chance?

I don't...here are the rumored spec's though:

217/225 .352/.333 116 N/A

I'm not convinced they are correct though.

Originally Posted by blueguy

Not sure on the Cloyes ones...

I ran an actual GM one...tossed it in there with the stock timing chain at the time of the XP install. Someone needs to machine a billet dampner, maybe that would help? I also didn't know there were "other options", unless you were just meaning different brands/producers?

That might help...but the double roller seems to work well. Except with the luck you had with yours.

I just wish I could get rid of the extra vibration that the DR creates due to the balance shaft deletion.