KEN LOWE  RACE CAR Hardware
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LOWE Fuel Systems

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LOWE  Fuel Systems
Poppets, check valves, springs and shims

35562-xxxxx Fuel system check valves (poppets) -----------------------
wpe8.jpg (26660 bytes) wpe9.jpg (23020 bytes)
Pressure settings are in the last four digits with
one decimal place example 22.5 psi is  -60225
35562 60000 AN-6 pressure poppet (specify pressure)
                     Left hand picture
35562 80000 AN-8 pressure poppet (specify pressure)
                SAE flare x SAE flare
                        Right hand picture, left poppet
35562 80000 AN-8 pressure poppet (specify pressure)
                       SAE flare x SAE o-ring
               Right hand picture, right poppet
For adjustment shims and springs see sections below

35649-xxxxx Fuel check valve shims ---------------------------------------
5649-60020 -6 Half shim .020

35649-60042 -6 Full shim .042
35649-60094 -6 Double shim .094
35649-60187 -6 Fat shim .187
35649-80060 -8 shim .060

35680-xxxxx Fuel check valve springs -------------------------------------
wpe6.jpg (34186 bytes)
-6 poppet spring selection
35680-61000 Poppet spring ..020 wire 12 turns 1.350 long

35680-62000 Poppet spring ..021 wire 8 turns 1.450 long
35680-63000 Poppet spring ..024 wire 13 turns 1.400 long
35680-64000 Poppet spring ..028 wire 10 turns 1.300 long
35680-65000 Poppet spring ..034 wire 8 turns 1.250 long
35680-66000 Poppet spring ..040 wire 16 turns 1.475 long
35680-67000 Poppet spring ..048 wire 11 turns 1.200 long
35680-68000 Poppet spring ..050 wire 1 turns 1.250 long

Memo: For your information
35680-68000 spring = 40 psi with no shims, 200 psi with two .187 fat shims. This is a typical pump saver application.

-8 poppet spring selection
35680-83003 Poppet spring 3 .028 wire x 6 turns x 1.500 long    
35680-83006 Poppet spring 6 .036 wire x 10 turns x 1.550 long  
35680-83010 Poppet spring 10 .035 wire x 10 turns x 1.900 long
35680-83020 Poppet spring 20 .048 wire x 10 turns x 1.500 long 
35680-83030 Poppet spring 30 .054 wire x 10 turns x 1.500 long 
35680-83050 Poppet spring 50 .060 wire x 8.5 turns x 1.500 long
35680-83090 Poppet spring HP.075 wire x 10 turns x 1.500 long 

EZ Start valve
EZ Start Valve

I have been using fuel injection since I purchased my first one in 1967. I have owned and used every brand of fuel injection made. Every brand of FI has the same problem which we have solved with the EZ Start valve. When I started using fuel injection in drag racing we were push starting the cars to a start like the sprint cars still do. The hard starting characteristic of fuel injection was no problem as the push start was not affected by the problem. Then on board starters became popular in the early 70's and were later mandated by the drag race sanctioning bodies.

With onboard starters simply priming the fuel system has become the normal way to start fuel injection cars unfortunately some fuel injection systems are hard to prime. Stack fuel injection requires a "drink" in each port stack just before starting the engine and some times it requires more than one "drink" to get the engine running normally.

On hat type injection the problem is not as big but still there. Adding extra fuel with the start bottle or primer bottle to assist the engine until it get the fuel to the nozzles is easier because you can just squirt a bit on the throttle plate until the engine is running smoothly. Knowledgeable crew are required for this job as them must know how much to add and when to start and stop the bottle.

The most important question is, why do you have to prime the fuel injection every time to start it? Why is it sometimes it wants more fuel than other times?

When you analyse the fuel system you see that the fuel pump picks up the fuel from the tank and pushes it up to the barrel valve and on to the nozzles. On non supercharged fuel systems when you shut the engine off with the ignition, the fuel is stopped at the nozzles as soon as the engine stops turning. The fuel system is ready to push the fuel out again as soon as the fuel pump is turned by the engine.

What happens while the engine is sitting awaiting a restart is; gravity acts on the fuel in the fuel system and attempts to pull the fuel back to the fuel tank. How quickly it pulls the fuel back to the tank is dependant on the fit of the spool in the barrel valve and the fit of the gears in the fuel pump. Eventually it will pull the fuel back to the tank. Even if you have the fuel shutoff valve closed some of the fuel will be drawn back into the tank just by the action of closing the valve.

The simplest most reliable solution to the problem is to install a LOWE Fuel System EZ Start valve in the line on top of the pump or if the fuel shut off is on top of the pump then install the EZ Start valve on top of the fuel shut off. Select the -6 or -8 depending upon your application.

After each race meeting the normal procedure is to clean the methanol out of the fuel system and Triflo all the lines and valves to prevent corrosion. Check the one way action of the EZ Start valve each time and spray the EZ Start valve with lube. At the start of each race because the fuel system is dry of fuel you will still have to prime the fuel system with the start bottle when you first warm the engine up.

With the EZ Start valve in you fuel system the normal starting procedures to crank the engine over with the butterflies closed until the engine starts. Opening the butterflies on a fuel injected engine while cranking to start the engine breaks the vacuum under the butterflies and thus stops the engine from assisting the fuel system from pulling the fuel into the ports with the manifold vacuum.

The EZ Start valve has a very low pressure opening point that does not restrict the fuel flow to the engine. Another feature of the EZ Start valve is the positive seal the valve has that prevents the drain back of the fuel to the fuel tank. Made from CNC machined billet aluminium and blue anodised for appearance and corrosion resistance. Comes with o-ring seal.

All EZ Start valves are male thread sae o-ring seal thread..

35774-10006 -6 EZ Start valve ..
35774-10008 -8 EZ Start valve ..

Fuel injection instruction book.
To order you book please include your complete name and address and phone number. Inside Australia I will ship your book COD Australia Post but outside Australia I must have a credit card number. This will be the best $99.95 you ever spent on your race car. Or about $75.00 US.
Click here to order your book now

 

Ken Says..... click here
















 

 








 

 

 













The 31 Chapter 200 page Fuel Injection book is here for  more info on what has been called "the best fuel injection book on this planet". Now only $99.95AUD If you only learn one thing it is worth it
The FI book has been this price for ten years now, my publishing costs continue to rise and soon I will have to raise the price.
Currently all orders are processed at the old price of $99.95 - don't miss out - order now.

I must point out that my printing house (and all the rest of them as well) have raised their prices so when this last printed batch of books are gone... the price goes up. Order now and save.
Can I point out it is less than 50 cents a page!!!


We ship the FI book inside Australia COD Australia Post. When the order arrives at your post office you pay the postman and he sends the money to us. Outside Australia we require a valid credit card to make the charges to.


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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