Turn One pump bearing noise

Hi all,

I've got my LS1 84 944 on the road.....and what a blast!!  This thing has exceeded all my expectations and has been my DD for 2 months.  Engine is a well built 02 LS1 with 450 RWHP, S2 transaxle, and BMW hydroboost.  The only bug I need to sort out is the Turn One pump has a bearing squeal above 2000rpm that is really annoying.  I need to sort this out quick as I really only have a month to drive it before it goes away for an extended period (NO, I'm not going to prison!! lol).  What makes the Turn One pump unique for this application?  Is it only the pressure valve and, if so, can I replace it with a stock GM pump and just reuse the Turn One valve??  Thanks for all your help with this project and for your continuing support!!

ciao,
Gord.

As I understand it, the internals of the pump differ to change the way excess pressure is managed to prevent overheating the fluid inside the reservoir at high RPM. For a street car, a stock GM pump is supposed to be fine. I've just upgraded to a Turn One pump after experiencing that overheating on the track but have yet to test with the new pump. Good luck.

Rich

Hmm, not sure what the deal is. I've had my Turn 1 pump for 4 years and 4 track seasons with no issues. Have you called Turn 1?

Hi Doc,

I haven't called Turn1 yet, but they likely won't do anything for me since I modified their pump. I have a BMW hydroboost so I run the pump without the internal reservoir. It is instead plumbed to a large BMW reservoir. I tapped the inlet with 1/2 NPT, insuring no chips entered the pump (used a rubber stopper in the pump inlet and tapped it up side down). I can't imagine this mod is causing a bearing squeak. The car sounds absolutely amazing, but this squeak is really bad now.

sorry to hijack your thread but could you id the items in your LS1 that allowed for 450 rwhp?

Thanks

Jpr

BTW, I was having steering pump whine until I got racing power steering fluid and it has all but eliminated it. This was on a stock pump however.

my stock pump whine a lot. and have so much restiction at low speed. almost want to shot off the engine

after i change to turn one. the condion is much better since i am also use bmw hydro brake. i get much better brake feel !! a thought steering is bit hevey now