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Smoke When Booting

Hulk1010

By Hulk1010,
in Engines & Forced Induction

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Hulk1010 Community Regular

Hulk1010

Posted
Posted (edited)

when i give the car a boot from 2nd gear i sometimes notice smoke in my rear view mirror, i got the car tuned a few months back and everything was fine, so i'm just wondering if i should be worried or not, btw, i hardly ever even boot the car most of the time i drive normal, i don't know if this could be the reason.

last few months i used motul chrono 300v, and two days ago i switched to turbo light 4100, even before i started using these oils i would sometimes notice the smoke, it doesn't always happen.

thanks

the mods i have

pfc

fmic

cai pod

bleed valve

3inch exhaust - full

Edited by Hulk1010
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https://www.sau.com.au/forums/topic/140801-smoke-when-booting/
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Hulk1010 Community Regular

Hulk1010

Posted
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i might aswell add this here instead of making another thread, For the first time earlier on tonight when i gave the car a boot from second a small orange light flashed a few times to the right of the speedo, i then checked the knock and it read 65, the car pulled good, iv just never seen this light come on when driving, this was the first time. Also since i got the car retuned i haven't got any high knocks, this was also the first high knock

Steve Grand Master

Steve

Posted
Posted

Do you have a catch can fitted? preferrably externally vented, if you must plumb it back, make sure its properly baffled

blow by is something that alot of people seem to overlook

And personally I would be taking the car back to the tuner and asking him to recheck the tune, it may just be that your plugs are not up to task, or some other cause - but if you are suddenly getting higher than normal knock, something is amiss and your tune may need attention.

Hulk1010 Community Regular

Hulk1010

Posted
  • Author
Posted

no i don't have a catch can fitted, is it important?, just before the tune i got new irridium plugs put in, the tuner double checked them to see if they were gaped correctly every thing was fine

MBS206 Grand Master

MBS206

Posted
Posted

THrow the iridiums away personally... Heard of quite a few RBs misfiring and carrying on with iridiums in.

Also, white/grey smoke, can also be oil from the turbo.

Blue smoke is BURNT oil ( In combustion ) white/grey can be oil getting around the seals in the turbo and straight into the exhaust, so it's not actually burning, but vapourising.

If you don't beleive me. Go heat some oil in a sauce pan (Don't get it explosively hot) but a fair bit hot, and watch the smoke that rises.

Steve Grand Master

Steve

Posted
Posted

from what has been described, its not turbo seals.

Hulk 1010, a catch can is very important, and so often overlooked.

It stops crank case gasses (blow by) being recirculated through the intercooler, but more importantly stops oil from blow by going into the combustion chamber. Blow decrreases the intercooler efficiency, and can cause detonation.

The harder you lean on an engine (more power) the more blow by you will get.

RBs do breath a fair bit, especially so if you use too light an oil - 3g 5w50

The smoke coming out of the exhaust - from what you've said, sounds pretty normal - the high knock reading is worth getting checked.

Instead of listening to everybody on here - take it to your tuner/mechanic and let them sort it. Without seeing the smoke first hand, its pretty damn hard to say for 100% certain, if you have something to be worried about or not.

Hulk1010 Community Regular

Hulk1010

Posted
  • Author
Posted

thanks for all the replys

Iv been looking at a few catch cans on various sites, what would a reasonable price be for one? the ones from overseas appear cheaper but i don't really want to wait a long time for the product to arrive, also i'm not sure about the hosing size.

thanks

these are some of the ones iv come across

http://www.nengun.com/catalogue/search/

http://www.slidingperformance.com/catalog/...amp;x=0&y=0

Steve Grand Master

Steve

Posted
Posted

The greddy square type can be opened, and you can put filling (copper wire scourers work well) in them to catch the suspended oil particulate from the blow by - would be my recommendation

The come with all the clamps, quality hoses and mounting brackets and are great quality

cusco type would be fine if you are not plumbing it back in, but external vented is NOT street legal

your choice :D

Cubes Grand Master

Cubes

Posted
Posted
i was driving around a bit earlier on, about 25 mins in is when i saw the smoke

9:04pm... Thats night time.

Don't use the revision mirror at night to tell if you are blowing smoke or not as it always looks as if you are, especially with head lights behind you.

Get the other half to drive the car and you drive behind. Best and most accurate way to test. Providing she is familiar with the car and isn't freaked to boot second. :D

I've always seen a slight haze in the revision mirror when booting it at night with the person behind with their lights on.

J_Red33 Experienced

J_Red33

Posted
Posted
from what has been described, its not turbo seals.

Hulk 1010, a catch can is very important, and so often overlooked.

It stops crank case gasses (blow by) being recirculated through the intercooler, but more importantly stops oil from blow by going into the combustion chamber. Blow decrreases the intercooler efficiency, and can cause detonation.

The harder you lean on an engine (more power) the more blow by you will get.

RBs do breath a fair bit, especially so if you use too light an oil - 3g 5w50

The smoke coming out of the exhaust - from what you've said, sounds pretty normal - the high knock reading is worth getting checked.

Instead of listening to everybody on here - take it to your tuner/mechanic and let them sort it. Without seeing the smoke first hand, its pretty damn hard to say for 100% certain, if you have something to be worried about or not.

After reading the mods done to the car & reading these comments I'd have to say this does make perfect sense. I've got a friend with an S14 who had to put a catch tank in after similar mods as he was loosing stacks of oil (Partly to do with the fact that he couldn't turn boost below about 16 PSI!) Catch tank cured his issues. Surprised the workshop hadn't suggest you fit one too.

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