0Anthony @ LGMotorsports

Hey guys,

I know most of us use a quality gas station and one that you visit on a regular basis. Some of us however do not, and for those that visit the 'race fuel' pumps at the track please take note of the following.

This was removed from a 2009 Z06 track car. Customer uses a blend of street and track fuel but also picks up the fuel at the track. On the dyno with it and it was going lean, fuel pressure check showed an increasing drop in fuel pressure through the run to the point it was dropping below 40 psi at the engine. As you probably already know the filter is mounted inside the fuel tank, so replacement of this is not an easy task.


FUEL PUMP ASSEMBLY



FUEL PICK UP



FUEL FILTER




Be sure to use a trusted source for your fuel!

0Anthony @ LGMotorsports

For those of you that buy fuel at a race track that might not see much action or turn over on the fuel, I would suggest filtering the fuel before you pour it into the car.

I do not think you would find this from any quality normal street station that has a high turn over and constant fresh fuel in the tanks.

Falcon

Is the fuel filter of a C5 in the tank?

stevensa

C5 filter/reg is outside of the tank on the drivers side just ahead of the fuel tank.

froggy47

I "think" on the 2004 it got changed, correct me if I'm wrong.

They "tried" out some c6 stuff on the 2004 c5.

db2xpert

Really good info !!

What should we filter it through?
Any recommendations?

Does Techron or any other cleaners help with these issues?

Thanks...

c5_4_me

97 and 98 cars used one type of fuel filter, without a regulator.
99-2003.5 cars used a filter/regulator setup
2003.5-2004 cars used a different setup, which I am ignorant about.

rfn026

A couple of years back I did an article on fuel. One of the more interesting items was that NASCAR will not use the tanks at the track. Sunoco has specially constructed trucks that dispense the fuel directly to the teams.

When I'm at the Sebring 12-hour it seems almost all the teams have their fuel shipped in. You seldom see a crew at the Sunoco station that's in the infield.

Richard Newton
Facebook

froggy47

Thanks, if I can dig it out I'll post some info on 2003.5 -4 filter from my fsm.

0Anthony @ LGMotorsports

The 2003.5 through current cars are just like you see above. The new Camaro's.....and I'm going to assume pretty much all of the new cars have this filter inside the tank.

Now when we get fuel at the track for the race cars, it comes in trucks and already has all of our dye marker in the fuel and (I'm assuming) is filtered for us. The race cars of course have filters on the lines and we rarely have an issue with it.

I would highly suggest using a filter in your jugs that you get fuel from, or many have a pump with a filter on it so they can pump into the fuel jug and/or car from.

froggy47

So the cut open filter above is built into the assembly above?

fatbillybob

We have been watching this problem for years in Ferraris who use plastics and rubbers of lesser quality than durable US spec that goes for 100k miles vs the typical Ferrari 10k mile garage queen. Before suspecting the fuel I would look close at the junk in the filter and see if those bits are really in the fuel or breakdown product from ethanol etc in fuel eating the fuel system. We have could it is not debris in fuel but composition of the fuel that is a problem. Something simple as gasohol has a huge varitation of how muchethanol is really in it vs. What's on the label.

0Anthony @ LGMotorsports

Yes sir.

0Anthony @ LGMotorsports

This is what it looks like....in it's placed and the cover pulled down so you can see.

froggy47

Thanks,

Hope I don't have to dig that out. I replaced mine on a 96 lt4, piece of cake.



I only use the "top Tier" gas, supposed to be a higher standard of detergents.

Crappy 91 octane in Kalifornia.

froggy47

Ethanol problems are going to be popping up for years, damn politicians.

stevensa

That is right, my bad, I should have been more specific.

froggy47

No worries.

0Anthony @ LGMotorsports

I don't know if the 10% stuff would do something similar to this....but higher concentrations of it will for sure.