Fuel starvation, who else?

Originally Posted by phunk

Good news!!!

I just got off the phone with our initial track tester. While they had delays from our initial plans, it turns out they actually installed it last week and were able to begin testing over the weekend.

I am still looking for them to push it harder, but so far it has done its job to the level where we feel comfortable getting started off on a production batch of them. Aside from functionality, I was looking for confirmation on fitment and complete function of the level sensor setup and everything, and there have been no issues with that either.

What was reported to me was that over the weekend they ran the car on a track with a heavy right that would always give them trouble anywhere below 3/4 tank. He said they ran the car down to 1/2 tank and experienced no issues.

In the situation of this product, if it works at any tank level, it will work at all tank levels. However, I still want them to test it more and bring it to lower tank levels because at lower tank levels it will effect what we are calling "recovery time".

I want to make sure that with even less fuel available to the factory pump assembly to send to our surge can, that the setup continues to work without any noticable fuel pressure drops. While we already know now that this product is definitely helping, I was looking to not only "help" this problem, but completely murder it. I want to hear that this is allowing you guys to run the cars to 1/4 tank or below.

when i instructed them how to plumb it, it was one of two plumbing maps that we have. it was the more simple one. This more simple configuration doesnt use one of the ports, we had them block it off. But that extra port is needed for the more complex plumbing map. While we believe the more complex map will offer greater functionality of the product, we also feel that it introduces more dynamic situations where a balance could possibly be disrupted causing a bizarre situation. It may not be possible to make it happen, but we dont know without trying that plumbing setup. We wanted to try the simple setup first because we figured it may actually work well enough that the more complex plumbing arrangement wouldnt even be needed. The first production batch will keep that extra port to block off... but if we find that nobody needs to try the complex plumbing map, we will end up just eliminating that port in production.

We are going to start gearing up to build a large batch of these shortly now. We have a couple things to finish up in the CNC and then we should be able to start. I am confident enough now that if any problems should arrise from this point forward, it would be resolveable within adjustments to the plumbing.

Originally Posted by phunk

with a stock fuel system, there is no where to mount a fuel pressure sensor at all. a port will have to be added to do this. there are products available for older VQs that use the same 2-bolt flange in a couple spots in the engine bay fuel lines. They space the flanges and give you a port. unfortunately on a VHR motor, the only 2 spots where you can use one of those is right on top of the engine in the front, so it wont be tucked away out of sight, but at least easy to get to. one is directly in front of the intake manifold by the PCV connections and the other is on the passenger side either at the very front of the valvecover or mounted to the timing cover, in that area

Originally Posted by phunk

either way, we are all caught up on everything else in the CNC so we are beginning setting up and building fixtures to produce these this week. too late in the season for a large percentage of guys.. but it will be there for spring time!

Originally Posted by phunk

no more known test results that i am aware of at the moment, but i havent spoken to the team testing it since i originally posted their results. i will have to get in touch with them soon.

either way, we are all caught up on everything else in the CNC so we are beginning setting up and building fixtures to produce these this week. too late in the season for a large percentage of guys.. but it will be there for spring time!