clean system

whats the best way to clean the fuel system ? i was going to hook a air line to the barrel valve and open the throttle and blow it in to the cylinders then take the plugs out and roll the motor over thill it was all out how do you guys do it

 

Its always a good idea to blow some marvel mystery oil through the pump, barrel valve, and injectors to protect against damage from moisture.

Richard G

 

how about wd40

 

MMO yes... WD NEVER!

 

i have always blowed the system out with air then sprayed wd-40 i all the lines and in the pump i have never had a problem on mine

 

will MMO pass a fuel check? I know WD40 won't.

I have a very mild blown small block. At the end of the weekend, i drain the system, put about three gallons of race GAS in it, light it and run it for a minute or two. It goes everywhere, and flushes every nook & cranny. When i pull my checks out to work on them, they are all full of gas, not alky.

 

We always cleaned our Nitro system with WD.
Curious to know why this should be bad, in case there`s something I`ve missed.
During the winter season, we fill the pump with oil and seal it off, so there`s is no way of letting it dry out.
I know several (nitro) teams that put oil in the pumps between seasons...
Also some manifacturers says this works fine..

What do you think is best for the pump?

 

don't know that it happens EVERY time... but i have personally seen WD and alcohol blend together and 'cloud/gel' up

honestly don't care what everyone else puts in their system but i will not put WD in mine

MMO is a great lube for your system and is very blendable with fuels (some people use it as an additive/top lube) so if there is any left in the lines it will burn easily and with no consequence during the warm up

fwiw... i did the WD thing when i first started tuning alcohol cars. why? because 'everyone else did it'... so it must be right? right? but seeing the reaction i described above changed my mind and i decided to find something better

 

Eric,

What kind of oil do you put in your fuel pump before you seal it? WD in it too?

 

We've had the gelled up alky stuff in our system on the small block right after we bought it, it was no fun, played all kinds of hell on things.

We never found out what caused it, and have never seen it since. We dont use wd-40 in the fuel system, I do however squirt a bunch in the injector when we shut it down for the last time.

I know some O-ring materials dont like WD-40.

 

Some say TriFlow, Some say WD, Some say ATF, me if its marvelous and mysterious its gotta be the best.

 

No WD in the pump - I think we put Amalie 70 in it.
We`ve had the pump (Waterman) for 2 seasons and we not seen any diffrence in the fuelpressure (idle or race) from when it was brand new compared to this season (2nd). Same nozzle areas.
That is after storing it with the oil inside.

 

what is mmo and where do you buy it

 

Marvel Mystery Oil. Autozone, Napa, Walmart, True Value, etc... It's pretty much everywhere.

 

Wd-40

WD-40 causes detonation, thats what we used to use to start a diesel engine. Detonation is not good for an alcohol motor

 

I have two issues with WD40.

1. fuel jel
2. failed fuel checks. On the PM i work on, this is a BIG problem. i'm using MMO to flush lines now.

 

i never use it when national event racing only when i put it up for the winter i have failed a couple of fuel checks before only thing i could relate it to was the wd-40 that had been the system

 

as for our pump I use torco assembly lube in it and before the season starts I pull it apart clean it and use it my flow # still the same..Dave