fuel pump flowmeter setup

Has anybody built their on flowbench for fuel pump? If yes would you post how and how to do it the right way

 

First shop for used, building from scratch is time consuming and expensive.

 

I built mine from scratch and I would have to agree

How to build depends a lot on what you want to accomplish. I wanted to know about my entire system, so mine uses the exact hoses from the vehicle, but I'm not setup real good to check just pumps (although I redoing it now to accomplish this better)

 

I guess if you used the flow meter and data system from the race car, then you main expense would be the variable speed motor/gearbox setup.

GK www.motorsportsinnovations.com

 

We did some testing once. Testing the pump is pretty straight forward if you have access to the parts. Start with a variable speed drive motor with a fixture for the pump. Some plumbing, a good pressure and flow meter and then a valve to keep the discharge pressure at a constant level. Problem now of course is that if you want to know exactly what is happening, then everything needs to be calibrated or rediculously stable, otherwise you will not see differences caused by wear / tear.
Doing it the right way for consistent results over years of use requires serious effort, so when we're in doubt we now ship it to somebody with a flow bench.

 

IFM ultrasonic flow meters , A VFD drive to drive your three phase motor & crap load of time , I am finishing two flowbenches right now , They both have 3 flowmeters on each one to monitor flow . I had to build my own , because I am running turbos with mechanical injection & also have a boost sensor station built on it , I will take data from the car to the bench & visa versa . Nobody can give me the magical prescription to hit it right on , I had Don Enrique set the preliminary system & is been doing turbo set up for years , but as with the turbo deal & changes very quickly so I knew I had to have my own bench .

 

Flow my bench

I have a flowbench that jerry at crower built years ago. can go 80gpm with variable 3 phase motor can go either direction. give me a email address I can send you some pics of it. chess bushy used it, but he also said the computer on his car was saying exactly what the bench said, so they stopped using the bench and went off the flowmeters on chess car. this thing isn't beautiful,but got the job done. also in the book lowe writes , he says a lot about his flowbenches he has built over the years. dan

 

Teach me what Davenport's software can do. For instance, recently I wanted to lean my engine at a lower RPM but not at a high RPM. I thought to myself, oh I've done this before, just turn the high speed on a little sooner. I decided to put everything on the fuel bench and verify this would be the case. Good thing I did, because it effected the high RPM much much more then I thought.

Would Jetsize do this for me?

 

if you were already using the highspeed how would turning it on sooner effect the high rpm differently?

 

Unless the highspeed is an electric solenoid isn't it going to stay open past the pre-set crack point? It won't work at low pressure and not at high, so I would imagine it would effect everything after its crack pressure? Right?

Corey

 

I have a very basic Excel spreadsheet that if you know pump flow and all jet sizes it will tell you amount of fuel in hat and motor

I tried to figure out how to post it for download but was not able

if you want it to play with it help me post it or email me and i will send to you

rickeyl@otelco.net

 

This is what I thought too and I know I've checked this on one of our other engines (on the flowbench)

I have my suspicions that I'll check later, probably after the season is over

 

Correct, so if you open it at a lower psi/lower RPM it will lean at a lower RPM without effecting the higher RPM, but in this particular case (for whatever reason) it did lean the higher RPM also, not as much as the lower. Which is why I like having a flow bench so I can check my actual system and make sure it does what I want it to.

PS Hindsight I would have called it a return poppet vs a high speed.

 

I've done it on one of my other engines.

I should not have called it a High Speed but regardless its a spring poppet.

 

OK, but how can it not effect the higher RPM because the poppet will still be open? As the rpm goes up so will the pressure, the poppet couldn't close at a higher pressure, so it stands to reason it will effect things all the way AFTER it opens?


Corey

 

Sort of back onto the original topic......anyone got a decent working fuel system/pump flow bench that they want to sell? Would prefer nitro capable, but have an open mind. Details to whome@look.ca or 905-263-4599. Thanks.

 

We are all not quite on the same page. In my comparison, both runs are with the poppet opening, its just that one is opening at a different RPM. So yes to Mike I agree if you are comparing opening it vs not opening it then yes it will change the higher RPM.

My point was to let the original poster hear my opinion, and that is, there is what you think is happening and then there is what is actually happening, sometimes our perception is correct and sometimes not. That's why my flow bench is setup to run my entire system to verify my perceptions/theories.