My Build

[HI PSI]

Nizpro cover is back... Bit dusty in the pic, but you get the hint.

Edited 14/05/18 11:45 PM by k31th
pb pics fix

[HI PSI]

After unpacking the Haltech flex fuel sensor, I noted that the lines for the unit are only 3/8'. As I am running -10 feed and return lines, this was going to pose a significant restriction and this is unacceptable. I spent that nigh looking at ways to adapt the sensor into the line, while ensuring adequate flow through the sensor and not creating any restriction. Sounds easy hey...

I grabbed a Speedflow catalog and started to make up a parts list, Despite all my efforts, every scenario looked like Frankenstein's cousin made a log style setup for the Flex Fuel Sensor. As making it work with Speedflow fittings would have cost around $400, and would have cost around $400. Obviously, this thought got scrapped pretty quickly.

So, I put the thinking cap on and started to design a log style system. When designing the part, I used the principle of: path of least resistance, to ensure that the sensor would receive adequate flow, for it to be able to provide accurate information. With this in mind, I realised that I would have to create a pressure point (Restriction) in the main line just after the feed line for the sensor, and then create a pressure drop just before the other end. this is what I came up with....

I dirlled and machined some alloy rod on the lathe, to match the diameter of the -10 alloy weld ons for each end. and drilled the ports to match the flex fuel sensor, plus Speedflow fittings.

 

To ensure correct flow, I calculated the send area of the -10 lines and subtracted the same of the flex fuel line. With this I concluded that the restrictor would be around 10.6 mm in diameter, down from the 13.6 mm of the fuel line. So I drilled the feed end to match these figures.

 

The restrictor starts at around 40 mm inside and is around 50 mm in length. After which, it returns back to the original 13.6 mm diameter. Both ends were then tig welded, with the -6 weld ons soon after. this is the final result...

Edited 14/05/18 11:46 PM by k31th
pb pics fix

[JETURBO]

3/8th on the return line should be more than adequate

Also the FPR will take care of any backpressure as it doesn't flow backwards even if the return pressure did get that high

John mc kean ran one with over 1100fwhp and iirc flow to support 1500hp of E85

What fuel pumps/pressure are you going for ?

Edited 10/11/15 11:58 PM by Womend Bellbat

[HI PSI]

I am running the KPM 1500hp intank module, It runs dual Wlabro 460's. Dave from KPM told me to run it at 4 bar.

[barnz]

Not sure if you have seen it but there is some speculation over on AFF that the kpm1500 does not infact support 1500hp...Jim has apparently found the limit at 700 od rwkw

Edited 10/11/15 11:59 PM by barnz

[JETURBO]

Yeh that's standard

I don't think you would of had an issue ( might of ) but definitely not under WOT but at idle it would of only worked pressure up to the reg base as worst case ( assuming you're using a FPR 2000 ?

[Ralph Wiggum]

Someone dig up my post questioning how much fuel you can possibly supply through the stock lines.

[barnz]

If your referring to what I said ralph it is just speculation as its possible there is more in it with some tweaks such as fuel lines ect

[Ralph Wiggum]

Changing fuel lines kinda kills the drop in tag though?

[JETURBO]

You all know what I think about the Keep Paying Money system