Vaporworx / Rick's Tank Problem - dropping fuel pressure at high rpm?

[CarlC]

Low,

Thanks for coming in. Here's a flow table performed by RC Engineering for the LS3 pump at the outlet of the module. Bryan is running the complete module in the car. A bit of re-scaling is needed to adjust the BSFC accordingly.



At the same time ZL1 and CTS-V fuel modules were also flow tested. The results for the CTS-V are very similar to those obtained by Kinsler for a CTS-V fuel module, so the flow numbers should be good.

One part of the equation that may be missing in yours is the fuel draw required to drive the venturi pumps in the fuel module. If you are taking the flow readings from the outlet of the pump instead of the hat outlet then your flowrates will be higher. Did you remove the pump from the manifold housing for testing?

I was looking at your DW300 last week for a potential project. It's a heck of a pump. Very efficient and nicely packaged.

[LowFlyin']

Originally Posted by CarlC

One part of the equation that may be missing in yours is the fuel draw required to drive the venturi pumps in the fuel module. If you are taking the flow readings from the outlet of the pump instead of the hat outlet then your flowrates will be higher. Did you remove the pump from the manifold housing for testing?

I had to hook the venturi part of the bucket to the LS3 pump to get a good flow reading out of the pump. With the venturi supply line disconnected and flowing free into the tank, it only supplied 150LPH @ 40psi.

[glassman]

So Bryan, what was the result?

[carbuff]

The car is back together and running, and everything is working so far. I drove it last weekend and thought I was capturing data to confirm that the pressure was staying stable, but unfortunately I did something wrong and lost the data. I'll do it again this weekend.

I've noticed that it hold a precise 58 psi at idle, and when I blip the throttle, I see it drops to about 56 and stays there. Again, I need to drive and capture some data to get more exact numbers...

I'll update more soon. I just moved this week, so TOW has been sitting while everything else has been dealt with! :\