Friday, April 25, 2014

Fuel System pt 1

Hurrah. With the spend embargo lifted I've started procuring parts for the fuel system. Having done a lot of analysis on this there is not a cheap way to build a fuel injection supply system cheaply... and safely.
The US LS swappers anecdotally talk about no change from $1000 and the same is about right for here (when you convert currency) when you factor in pump, filter, regulator, hose, hose fittings, clips and of course the tank itself.

So the above shows most of the connector parts.
And above on the rhs is the bullet filter and filter regulator.
My system design is as follows:
AK made stainless tank. (I don't feel the need to make this myself)
AN -8 feed from tank to high flow bullet filter. (1/2" gravity fed ptfe Teflon stainless braided hose. This hose might not have markings on it stating fuel however I have documentation from the company stating fitness for fuel injection which is a requirement for IVA test)

Bullet filter with steel mesh 40 micron filter (replaced the 8 micron paper one - too fine for gravity feed.
Bullet filter direct connection to Bosch 044 fuel pump. This is a WW re known workhorse.
AN -6 ptfe Teflon stainless braided hose to Wix 37337 filter regulator. This is a standard Corvette filter regulator which provides a return to the tank with regulated 48psi output for the fuel rail.
AN -6 line back to tank for return (at idle speed 90% of fuel is reported to need to return)
AN -6 hose to engine fuel rail.


This is the steel mesh filter element. A bit larger than recommended on inlet for Bosch pump but I'm not building a race car so not too worried about that.
More importantly I have the post filter and regulator so that fully filtered fuel reaches the injectors at the right pressure.


A couple of challenges to overcome are some bolt anchors cast into the transmission casing. These are not needed, non structural and are totally in the way of giving enough clearance for the fuel line taking engine rock into consideration.



One down, one to go.
This is what the problem would have been. 

More coming in the next instalment. 

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