F+T build - What do I do with the flame trap?

Hey all, I just finished my F+T build on my 240 but the stock cold side intercooler pipe only has a port for the idle air controller, not the flame trap. What do most people do with the flame trap?

Route a tube from the breather box to before the compressor but after the AMM. Don't connect it anywhere after the compressor, that will put boost into the crank case.

the stock b230ft setup used a Y fitting, without the flame trap insert that looks like so:

Also remove the insert that has the holes in it. None of my turbo cars ever had that in them.

Alright, thanks guys. I'll try to find that plastic Y connector so I can put it inbetween the AMM and turbo. Will it harm my engine in any way if I leave it disconnected while driving it around some?

Not in the short term like test drives and stuff, but it needs to be there if you are putting miles on.

some people run the PCV to atmosphere as you describe, permanently. I personally wouldn't, but short term it would be OK. If you have iffy oil seals/leaks I wouldn't at all. It will accelerate those.

At least put a tube attached to the breather box facing down, or everything in the bay will get a nice coat of oil & nasty water, as well. A lot of crap comes out of that breather!

probably not. Alot of people let it vent to the atmosphere, but hooking as said above. But I thought it needed to go before the AMM or could cause a lean condition or mess up ECU trying to tune? I have mine hooked between air filter and the AMM with catch can of couse.

90volvo said:

probably not. Alot of people let it vent to the atmosphere, but hooking as said above. But I thought it needed to go before the AMM or could cause a lean condition or mess up ECU trying to tune? I have mine hooked between air filter and the AMM with catch can of couse.

Click to expand...

Attaching the pcv pipe before the AMM would cause the oil/water/whatever else the breather doesn't catch to contaminate the hot wire. I think the combustion byproducts are inert so they wont affect the air reading. A low mileage setup would be fine routed as you describe, but a loose 200k +t setup probably wont, haha

I too would recommend a catch can. Mine fills up fast

A heads up, catch cans will not pass visual emission checks, I have tried that before. Even improving emissions systems causes a fail, the want no changes to the stock system and PCV suff falls under emissions laws. That really depends on your local testing laws. I registered as an antique so I can do whatever I want, but regular registrations are subject to the local laws.

Do not put it in front of the AMM as esmth said, it should be between that and the turbo.

Venting to the atmosphere does make a mess, and doesn't work as well. The vacuum hose hooked to the plastic elbow thing really helps evacuate the gasses from the crankcase.

https://oe-products.mann-hummel.com...ummel/kurbelgehauseentlueftung/ProVent_en.pdf

MANN Provent 200 works nicely in my 240. Plumbed between breather box outlet and turbo inlet. Drain capped, to drain once every few months.

Got mine from China, those ship with stainless steel filter mesh, which is less prone to clogg.

Looks kinda OEM.