So next friday im finally getting my semi tucked, p-tuning 3076, stock motor car tuned at evans. We are going to be doing a pump 93 map along with a 110 octane standard sunoco fuel map. Im curious to what you guys suggest is the best way to drain out one fuel and go to the next safely on a stock fuel line, stock regulator/rail car. What point should I unplug the feed line and put into a outside gas can? Is this possible to do with the stock hard fuel line?

thanks all!

 

I drain my tank (i swap from E85 to 91 once in a while) by hooking up a hose to one of my free ports on my fuel rail and setting my EMS to prime the fuel pump for 30 seconds.

In your case, you should be able to hookup a hose to the fuel pressure regulator in place of the return line. If you have AEM EMS, then you can set the fuel pump prime to 30 seconds or start the car to drain fuel.

 

GREAT! okay... can you show me in a photo the exact return line you are talking about that would need to be pulled and what hose would have to be extended into a gas tank outside on the ground?

 

i did this too just kept priming my car and dumping it into a gas tank, but now i fear running the pumps with little to no gas in the cars tank isnt good for the pumps

 

Buy a new hose (for the purposes of draining) and connect it the outlet of the FPR. See the link below...it's the bottom port in the 1st pic.

https://www.s2ki.com/s2000/topic/621...ure-regulator/

 

Awesome okay Ill do that. Do you know off hand what size ID hose that is? Looks to be a 1/4" ID... I have some chemical rated heavy duty line at work ill grab for this reason.

 

Not sure...1/4" might work