I've had to place an order at atkins rotary and took the opportunity to buy a can of amsoil power foam (Amsoil Power Foam Engine Cleaner (AMS-APFSC))

I've heard really good feedback on this but i'm not sure how to use it.

I was thinking about removing one spark plug for each rotor, unload the can till the chamber is filled, rotate the mainshaft counter clockwise, fill the other chamber. And keep doing it until all chambers are filled.
then put back the spark plugs.
wait something like 2 hours that the product reacts.
then crank the engine with the ignition fuse removed in order to expulse most of the foam in the exhaust.
then start normally and let it run until it doesn't smoke.
put new spark plugs.

i don't know how it will work with exhaust manifold going in the turbo. I'm afraid it could increase the back pressure and maybe break the manifold or something else.

I've also seen people injecting it directly in the running engine (using one of the pressure line between the intake and the brake master cylinder). But in that case it means that the foam doesn't stay really long in the engine.

Do you have some advice or even a clear tutorial ?

 

that won't happen, so no need to worry.

 

i just received the can and from the instructions, you have to shoot the can while the engine is running. then let the engine rest for 10 minutes then run it again until there is no smoke.

My question is where should i shoot the can ?
- brake vaccum line
- under the air filter
- in one of the small vacuum line such as the one going to the dump valve ?
- directly in the dump valve bong ?
- other ?

 

so its pretty much like seafoam.

 

i use water, i don't trust the emissions these other snake oils put out when being combusted.

 

Doesnt matter which vaccum line iirc...but ive only used seafoam and it says to put some in the oil as well and gas tank. Ive never used this stuff tho. Post results

 

I just sprayed mine through the exhaust ports, rotated the engine, sprayed more, repeat.
I would personally let it sit for a while. Although it's good at removing carbon, it needs some time to work its magic. It removed a good amount from mine but there was still a lot on the rotors.

 

A day at minimum. The more time it has to work the better.

 

ok, tomorrow i'm going in the countryside to spend the week end with friends. i'll try to arrive early enough to spray the foam via the brake vacuum once i'm parked there, let it rest for the day and have it restart sunday after lunch..

 

Exactly what are you trying to accomplish?

 

not a lot actually.
I have my rebuilt planned in 3 weeks.
the car has some issue with cold start. i'd like to regain a little efficiency to not be bothered while travelling across the country to reach the garage...

Anyway, i didn't had the time this week-end to try...

 

Sounds like tossing in some snake oil won't be much help.

Cold start issues are generally tune issues. Vacuum leaks, bad plugs, leaking injectors.

Unless compression is low.

 

i believe the compression are low on of the rotor.

I'm not trusting the injectors either...

anyway as i said, the rebuild and complete check of the engine start on 9th of august.
There should be not many issue since then.