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BEFORE ANY TURBO MODS

CONTENTS
Iconbefore.gif (4193 bytes)
To MODIFY or NOT
DETONATION
Pre-ignition & Fuel
Fuel Volume & Pressure
Air Supply
Exhaust & Heat
Lubrication
Cooling & Water
Breathing
Boost
Modification Sequence
Conclusions
BEFORE Turbo Modifications - Page 7    Next Page;- Cooling & Water

LUBRICATION - OIL

OIL's AIN'T OIL's Oil is the life blood of any engine, but more so for an early turbo car without water cooling to the turbo centre bearing housing. The later turbo's tend to have water recirculated thorough them as part of the normal engine cooling system. On early turbo's, the oil is expected to do the job of lubricating and suspending the centre bearings as well as cooling the whole turbo before draining back under gravity into the motor sump.
The oil is fed usually to the top of the turbo centre housing from the back of the motor oil pump at high pressure. On water cooled turbo's the oil has an easier job as some heat is dissipated into the water flowing through the jacket and this prolongs the life of the turbo generally. The main benefit is to prevent heat soak back coaking of the oil sitting in the stationary turbo after turning off the motor. Under normal driving the oil is pumped into the top of the centre bearing housing already hot from circulating through the engine and then flows down into the sump hotter than before the turbo.
This is why the STARION has a large oil cooler mounted at the front of the radiator in the air stream. When the engine is turned off, the turbo spins down and the oil sits there and cooks from the heat that soaks back from the turbo exhaust housing as the oil has now stopped transporting a lot of the heat away into the sump. The oil then begins to turn into a thick cooked sludge that can seize the turbine bearings and shaft.
OIL TIPS Check your oil, is it turbo quality, can it handle high temperatures. Do you change it every 5000 Klm's or sooner. Have you considered synthetic oils such as Mobil 1, etc. Do you have an efficient oil cooler or an extra one fitted. ( writing this I have just thought that it may be good value to have one on the oil line to the turbo or even after it, making sure there is no restriction as its a gravity drain back into the sump.)

Detonation is to be avoided at any cost.

Warning, the All TURBO CLUB Register makes this information available to you with NO express guarantee's implied or otherwise on the suitability of the information being relevent to your Automobile Make or Model. You should not make any modifications to your Automobile unless a qualified Mechanic has approved and checked that the vehicle is safe and roadworthy and meets all relevent State Governed Regulations before proceeding onto public roads. The information contained in this ATCR Website is believed to be correct but the Author and Publisher make no warranties, express or implied that the information is free of errors, or that it will meet the particular requirements of individual Automotive application.

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PreMods - P7 - Oils

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Turbo Club This page was last updated on 19-Mar-2009 18:35.

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