We then installed the lower intake manifold (LIM) onto the engine
Mounting of the Radium Top Feed Secondary Fuel Rail Conversion is very straight forward and easy. The two standoff brackets bolt the rail securely to the intake manifold.
The Radium Top Feed Secondary Fuel Rail Conversion also includes the anodized, billet, o-ringed fuel injector seats that look great in the manifold and ensure a secure fit of the fuel injector.
After installing the (4) secondary Deatschwerks 1,500cc fuel injectors, the Radium Secondary Fuel Rail, mounting extensions, thermal spacers, -8AN Low Profile Banjo Swivel Fittings, and Direct Mount Fuel Pressure Regulator, we were able to attach the fuel lines. We are using the Earl’s Super Stock Hose in ½” (-8AN) for the feed and 3/8” (-6AN) for the return. This push-on fitting hose is rated for fuel, race gas, E85, Diesel, coolant, and transmission fluid with a max working pressure of 250psi and 250*F, which is well above the fuel pressure that the system will see.
If I have not mentioned enough how much I like Radium’s attention to detail and their level of engineering, this will be another example. Radium designed their Direct Mount Fuel Pressure Regulator (DMR) with a swivel fitting so it can be clocked in any orientation and it has an NPT port directly on the body of the regulator itself, making for a very clean mounting of a fuel pressure sensor. We used a 0-100 PSIg AEM fuel pressure sensor.
7 comments
I am still here, consuming every FD update. This thing gets more awesome with every post!
Thank you 🙂
Great series. What’s the story with aluminium fuel hardline and ethanol-based fuel? My (limited) understanding is that aluminium needs to be anodised at minimum to protect it from the jungle juice.
Yes, ethanol can corrode aluminum, particularly when it contains water or in high-concentration blends The alcohol reacts with the metal to form aluminum alcoholate, causing white, chalky corrosion, pitting, and potential, severe damage to fuel systems.
Thank you. E85 is hygroscopic and will absorb water which can lead to aluminum corrosion only if it sits for long periods of time. Raw ethanol is generally safe for aluminum. Since we will not store or let the car sit with E85, running the aluminum hard lines will not be a problem. We will also be running drums of Ignite ethanol, so that further reduces this concern.
Very cool updates.
As part of the testing you’re doing for the single pump setup, how does the cost of making the larger aluminum fuel feed line compare to adding a 2nd fuel pump and using the stock feed line?
There are many solutions to a given problem. We wanted to find the maximum power the 415 LPH DW400 fuel pump can support on a rotary without fuel line restrictions. Once we reach that point, we will turn to a brushless single pump solution based on the layout of our fuel starvation solution in the previous article.