|
Post by wannabe on Mar 5, 2019 12:27:31 GMT
Once a day in the shower, isn't it? Oh, wait, that's not what I meant... I guess the question I'm asking is whether there's a way to reduce oil intake via the manifold (i.e. onto the back of the valves) so that when I finally get my head refurbished, I can keep it as clean as possible for as long as possible, to reduce risk/speed of deposits forming on the valves and help ensure good compression / reduced carbonisation over an increased period of time. Is it simply the case that the breather pipe from the cam cover into the manifold should have an air-oil breather/catch-can put in the middle of it, so the oil collects in there rather than being sucked into the head? And use decent petrol (Tesco Momentum? Shell VPower?) and/or separate additives (e.g. Redex? BG44K?) to help keep the insides clean?
|
|
|
Post by niklas on Mar 6, 2019 9:30:13 GMT
Breather pipes.
Cleanest intake will be with VTA, but since thats both illegal in most civilized places as well as smelly, catch can(s) are the way to go.
|
|
|
Post by atlex on Mar 6, 2019 13:07:42 GMT
The backs of the valves will be pretty damn clean even if you haven't got a catch can, because of the petrol flowing past it every intake cycle. Petrol cleans so well.
I run catch cans because I want to avoid punting blowby into the mix and the buildup on the intake walls (pre-injector), and also to see the blowby looks like after ever few 000 miles. FWIW on my turbo car it tends to be more thick/oily - on the ITB car, which vents to air eventually, it's mostly water, but you'd expect more blow by on a forced induction setup, so it figures.
|
|
|
Post by Zed. on Mar 6, 2019 14:52:13 GMT
|
|
|
Post by wannabe on Mar 7, 2019 13:23:31 GMT
The backs of the valves will be pretty damn clean even if you haven't got a catch can, because of the petrol flowing past it every intake cycle. Petrol cleans so well. I run catch cans because I want to avoid punting blowby into the mix and the buildup on the intake walls (pre-injector), and also to see the blowby looks like after ever few 000 miles. FWIW on my turbo car it tends to be more thick/oily - on the ITB car, which vents to air eventually, it's mostly water, but you'd expect more blow by on a forced induction setup, so it figures. Just to make sure I'm understanding correctly... 'blow-by' is when compression escapes past the piston rings and into the sump / escapes past the valve seats and into the head? I hadn't thought about what the inside of my intake manifold might look like but now I'm wondering... lol
|
|
|
Post by wannabe on Mar 7, 2019 13:24:44 GMT
Thanks for the link! Looks like some DIY work needed to mod it, which could be potentially risky but cheaper than the £170 Moss are asking for an oil catch-can, IIRC! (Also great that's it's see-through, so you can see what you're catching )
|
|