Oil catch tank

Discussions relating to Turbochargers, Superchargers, Induction, Engine Mods, Exhaust Mods, and other items specifically to make your MX5 or Roadster put out more power.

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warrior
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Oil catch tank

Post by warrior » Thu Aug 29, 2013 5:31 pm

I have a supercharged 1.6 and I am upping the boost to around 7-8psi. I have read, been told, that I should install a oil catch tank and a 323 gtx PCV valve.

Three questions.....

Is this worth doing? And does anyone have pics of this on there own car.

Has anyone heard about upgrading the PCV valve like this?

If I go ahead with this should I use a vented or non vented catch tank and appox what size?
warrior

Snapfrozen
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Post by Snapfrozen » Thu Aug 29, 2013 6:14 pm

If you run a catch can, don't buy a shitty trademe one. Do some research into it as the design can vary alot. I would run a vented ~750ml to 1l. Not sure of design on an MX5 but I ran my civic one from valve cover x2 to can to sump.

As for the GTX PCV. I've never heard it yet. Plenty of guys run big power turbo systems which I'm sure generate alot of crankcase pressure without changing it

last_resort14
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Post by last_resort14 » Thu Aug 29, 2013 10:56 pm

I ran my old 1.6 at 12psi, and now my 1.8 at about 12 too,
Always used the stock PCV with a catch can, never had any issues, never pushed any significant amount of oil out , just vapours

Keith Jones
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Post by Keith Jones » Fri Aug 30, 2013 1:54 pm

For race use I had to have a 2L catch tank with a 1.6L turboed engine, but I never changed from the stock PCV and in 8 years of racing never collected more than fumes in the tank.

Snapfrozen
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Post by Snapfrozen » Fri Aug 30, 2013 2:08 pm

Keith Jones wrote:For race use I had to have a 2L catch tank with a 1.6L turboed engine, but I never changed from the stock PCV and in 8 years of racing never collected more than fumes in the tank.
If you've got 2L in it, you've got problems :lol:

2low2c
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Post by 2low2c » Fri Aug 30, 2013 4:02 pm

2l is the legal requerment for a 1.6 turbo. because they work on registered cc rateing ,under 2000cc needs 1l catch can over 2000cc needs 2l.

built4speed
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Post by built4speed » Sat Aug 31, 2013 8:59 am

Incorrect as far as I know you don't apply the turbo conversion factor. It only needs a 1L one. My evo only had a 1L one being 1996cc. Ill even ask at scrutineering when the mx5 goes thru today to confirm.

2low2c
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Post by 2low2c » Sat Aug 31, 2013 9:42 am

sorry old rule haven't checked that rule for a long time

Snapfrozen
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Post by Snapfrozen » Sat Aug 31, 2013 10:30 am

built4speed wrote:Incorrect as far as I know you don't apply the turbo conversion factor. It only needs a 1L one. My evo only had a 1L one being 1996cc. Ill even ask at scrutineering when the mx5 goes thru today to confirm.
This was my understanding too. What I was getting at was if you had 2L of oil in a catch can, you've got problems :P

Keith Jones
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Post by Keith Jones » Sat Aug 31, 2013 10:34 am

The current Motorsport Manual says "engines up 2000cc (uncorrected) shall have a tank of at least 1L" and "engines over 2000cc (uncorrected) shall have a tank of at least 2L".
When my car was first scrutineered way back in 2004 they specifically asked about the tank size (that it was =/>2L), and I would assume that the wording above still means that a 1.6L turbo is "corrected " to 1600 x 1.7 = 2720.

Keith Jones
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Post by Keith Jones » Sat Aug 31, 2013 10:40 am

Snapfrozen. You're dead right in saying that if you had 2L of oil in a catch tank, you've got a problem. But that's the whole idea of the catch tank, to catch as much oil as possible if the engine lets go, eg. blown piston, and stop it all being deposited on the track.

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Post by SLYDIT » Sat Aug 31, 2013 11:12 am

theres a write up somewhere on how to fit internal baffles to the breather to make it a catch can style. it involved notching the internal baffle of the rocker cover and fitting some stainless scotchbrite pads in there...
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SLYDIT
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Post by SLYDIT » Sat Aug 31, 2013 7:20 pm

RED '90 TURBO.
SCARING PRIUS DRIVERS SINCE 2002

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