Fuel pressure question

[Bmaughan]

Just a quick question...

does anyone know how much the fuel pressure would have to drop in order to make a real change to lambda values?

I don’t have a pressure sender but my lambda is pretty solid all through wot pulls... I just didn’t know if there could still be some pressure drop... albeit a small one.

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[TGGT]

Just a quick question...

does anyone know how much the fuel pressure would have to drop in order to make a real change to lambda values?

I don’t have a pressure sender but my lambda is pretty solid all through wot pulls... I just didn’t know if there could still be some pressure drop... albeit a small one.

mine drops to around 43 psi, but my af stays good. What are you running for fuel system?

 

[Bmaughan]

mine drops to around 43 psi, but my af stays good. What are you running for fuel system?

Running e85
Gt350 fuel hat, dead headed regulator
Basically like the sai li kit. I have a couple boost a pumps so I can always turn them up just a bit, but like I said afr looks good.

 

[Bmaughan]

mine drops to around 43 psi, but my af stays good. What are you running for fuel system?

So a drop to the low 40’s is no concern I take it?i forgot to mention I have 1050x injectors. So I guess they’re probably flowing pretty good even if I’m getting some pressure drop.
What injectors are you running?

 

[TGGT]

Running e85
Gt350 fuel hat, dead headed regulator
Basically like the sai li kit. I have a couple boost a pumps so I can always turn them up just a bit, but like I said afr looks good.

same setup I’m running. D1x at 13 psi. I have a jms dual channel bap that I was running at 21 volts , but my tuner said turn it down to 18 because those pumps won’t live at 21 volts. What Blower are you running?

 

[TGGT]

So a drop to the low 40’s is no concern I take it?i forgot to mention I have 1050x injectors. So I guess they’re probably flowing pretty good even if I’m getting some pressure drop.
What injectors are you running?

Also id1050x.

 

[Bmaughan]

same setup I’m running. D1x at 13 psi. I have a jms dual channel bap that I was running at 21 volts , but my tuner said turn it down to 18 because those pumps won’t live at 21 volts. What Blower are you running?

I just have the p1sc.. making about 12lbs. I don’t currently have the BAPs installed so it just running with the dual pumps as is.
Do you think I should consider installing them?

My tuner seemed to think that my fuel system was more than enough... which is why I asked the question in the first place.. he has no way of seeing pressure just afr so I didn’t know if that really gives the whole picture of what I should be concerned about...

 

[TGGT]

I just have the p1sc.. making about 12lbs. I don’t currently have the BAPs installed so it just running with the dual pumps as is.
Do you think I should consider installing them?

My tuner seemed to think that my fuel system was more than enough... which is why I asked the question in the first place.. he has no way of seeing pressure just afr so I didn’t know if that really gives the whole picture of what I should be concerned about...

I would at least find a way to log fuel pressure if you can. Installing the boost a pumps couldn’t hurt either though

 

[illtal]

18+ have a fuel pressure sensor in the rails, so we are lucky. If you want to log via NGAUGE you can get an autometer sender and hook it up to your analog input on the back of the ngauge.

Or you can buy this
https://www.lundracing.com/fuel-pressure-sensor-0-to-150-psi

 

[sloride]

This is what I’m using for a little cheaper and have it reading into my NGauge and HPTUNERS. lines right up with mechanical gauge on my regulator.

BINZET DC Converter Step Down... https://www.amazon.com/dp/B00J3MHRNO?ref=ppx_pop_mob_ap_share

Autex Pressure... https://www.amazon.com/dp/B00NIK9E10?ref=ppx_pop_mob_ap_share

 

[illtal]

This is what I’m using for a little cheaper and have it reading into my NGauge and HPTUNERS. lines right up with mechanical gauge on my regulator.

BINZET DC Converter Step Down... https://www.amazon.com/dp/B00J3MHRNO?ref=ppx_pop_mob_ap_share

Autex Pressure... https://www.amazon.com/dp/B00NIK9E10?ref=ppx_pop_mob_ap_share

What the step down for?

 

[sloride]

What the step down for?

Some sensors run off of 5v vs. 12v

 

[illtal]

Some sensors run off of 5v vs. 12v

So this differs from the output? Sorry I read that the sensor is 0-4.5V output. I'm guessing the third wire is in, but where do you find out it needs 5VDC?

 

[sloride]

So this differs from the output? Sorry I read that the sensor is 0-4.5V output. I'm guessing the third wire is in, but where do you find out it needs 5VDC?

Further down in specs load resistance less than equal to 6ish volts. Output is 0-4.5v so you feed it 5v. Actually a lot of sensors similar to this just use 5volts.

 

[Bmaughan]

This is what I’m using for a little cheaper and have it reading into my NGauge and HPTUNERS. lines right up with mechanical gauge on my regulator.

BINZET DC Converter Step Down... https://www.amazon.com/dp/B00J3MHRNO?ref=ppx_pop_mob_ap_share

Autex Pressure... https://www.amazon.com/dp/B00NIK9E10?ref=ppx_pop_mob_ap_share

How do you get the transfer function set up for this sensor?

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