What you guys doing about smoke parking downhill

[mike miller]

My gen one busa has rcc/Stedman kit. Oil drain line is routed properly good downward angle but it's a daily ridden bike. Stopping on a downhill slope I get some smoke coming from exhaust due to oil backup. It's a 3an feed line with high pressure oil pump gear, you think a restrictor would help? It's only on downhill at stop signs. Oil level is good. 10/40 Castrol syn oil. Drain line is 8an fitting to pan

 

[Hayabusa Wannabe]

Not an answer, just some discussion on this issue, perhaps you have seen it:

My turbo installation | Turbo

Ok guys, I'm new to turbos and I'm trying to install a kit without directions. I kinda have a good idea of where most things go and do but I'm stumped on how to install this piece. Can anybody tell me what general area this goes?

www.hayabusa.org

 

[shade]

Check valve will help.
But if its a down hill you are going against gravity. Your drain can't go against gravity.
You could always get a scavenge pump as well

 

[Mr Brown]

What @shade said.

 

[mike miller]

Check valve will help.
But if its a down hill you are going against gravity. Your drain can't go against gravity.
You could always get a scavenge pump as well

Where are you getting check valves from

 

[hayabuser]

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[rubbersidedown]

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This may be your best post ever Bro...
Straight to the point.

Rubb.

 

[hayabuser]

This may be your best post ever Bro...
Straight to the point.View attachment 1620462
Rubb.

Somehow I got lost and ended up in here.....

 

[shade]

Where are you getting check valves from

McMaster-Carr

McMaster-Carr is the complete source for your plant with over 595,000 products. 98% of products ordered ship from stock and deliver same or next day.

www.mcmaster.com

 

[Boosted Cycle Perf]

My gen one busa has rcc/Stedman kit. Oil drain line is routed properly good downward angle but it's a daily ridden bike. Stopping on a downhill slope I get some smoke coming from exhaust due to oil backup. It's a 3an feed line with high pressure oil pump gear, you think a restrictor would help? It's only on downhill at stop signs. Oil level is good. 10/40 Castrol syn oil. Drain line is 8an fitting to pan

A restrictor will not help. Nor will a check ball on the drain. That will make it worse.

Do you have a stock or a flat oil pan? Post a pic of your return line if you could.

 

[202mphbusa]

One of the best things I did was the scavenge pump.

 

[mike miller]

I only get smoke on a real steep hill which I'm trying to avoid anyway but the drain is 5/8" push lock hose pretty good angle. I did find 5/8" check valve but haven't tried it yet

 

[202mphbusa]

I only get smoke on a real steep hill which I'm trying to avoid anyway but the drain is 5/8" push lock hose pretty good angle. I did find 5/8" check valve but haven't tried it yet

View attachment 1620495

check valves have a "cracking pressure" even as low as .5PSI IS NOT wanted in the return line
I have seen someone make a turbo outlet "catch can" then out the catch can into the return line

 

[202mphbusa]

Mechanical Scavange Pump "Pimp Pump" | Turbo

I recently purchased a "Pimp Pump" or Emtes Pump. Right now the line goes directly from the pump to the turbo. The directions specifically state DO NOT run a direct line because it could cause bearing damage to the turbo. The directions say use a "T" fitting connected to the crank case...

www.hayabusa.org

 

[mike miller]

check valves have a "cracking pressure" even as low as .5PSI IS NOT wanted in the return line
I have seen someone make a turbo outlet "catch can" then out the catch can into the return line

Ya I've seen that issue. I may just leave it alone. It runs fine and only once in a blue moon I get stuck on a hill

 

[mike miller]

Keeping the oil level a bit lower seems to have fixed the issue.

 

[BlueRacer]

If your going to run a check valve in the feed line, it’s a good idea to increase your idle speed because a Busa has very low oil pressure at idle and may not crack the valve. This I know because I fried my turbo from this exact problem. All sorted now though

 

[moko]

Don't park down hill....lol

 

[Redcurbjumper]

You need to buy the RCC mechanical scavenge pump!!! It Installs nicely, and it’s straight forward. You do have to cut a slot/hole in the right hand side of your fairing. Not a big deal take it slow. (Get on RevZilla and order your gaskets ahead of time because the RCC pump does not provide them) The missing link to successfully installing any scavenge pump is to create a oil reservoir/catchcan which is vented to atmosphere. This allows a free dump of the oil out of the turbo with no back pressure, and the scavenge pump will continue to draw the oil out of that catch can and replace it into the engine. I found about 300 mL capacity allows the oil output of the turbo, and the removal rate of the scavenge pump to not have an impact on each other.

Brian
2014 Busa stock engine with RCC stage 1 set at 4psi.