Proud New Owner of a Legacy RS Type RA

[subypower]

Have just completed the purchase of a 1990 RS type RA.

My first turbo car and am stoked with it!

Its completely stock apart from the Exhaust which is a 3inch turbo back leading into a 5inch muffler.

Too loud at the moment so am going to put a 3inch muffler on.

While on boost it sometimes surges any ideas why or how to fix this?

[subypower]

What sort of oil should I use and how much for a oil change?

[MercuryFree]

 subypower said:

What sort of oil should I use and how much for a oil change?

4.5L of oil (although a lot of people put a whole 5L in as a 'just in case' measure). People will have a giant argument between 5w30 and 10w40 but it probably makes no difference to most people's situation

[madmike]

VERY NICE G!!!!!!!

[X]

check your coil pack, usually that cause a surge or boost cut if one of them is dodgie

[94 Leone]

Is this that one that was up on tm? Not sure what it was but the guy said the muffler was 5 inches or something ridiculous like that?

P.s. nice car bro.

Sent from my GT-I5510 using Tapatalk

[DacerX]

yeah thats the one thats been on tm for ages,

[johnny5]

Nice one mate

[Divine]

Wow, that's sweet, change the exhaust and keep it original lol

[subypower]

U reckon its the coils? Not the AFM or O2?

Yea the exhaust is a 3inch turbo back leading into a 5inch muffler.

Will post more pics soon

[X]

O2 usually cause your car to run rich it wont cause cutting, AFM will sometime make ur car idle really bad. coil packs can cause surging or boost cut as its not getting enough sparks. could be spark plugs also

[ben-jamminn]

+1 on plugs, my sti used to do that, new set of NGK Iridium plugs and its sweet now.

As for oil, 4.5L of Castrol Magnatec 10W40 is what I use too, chuck a new oil filter on too

[94 Leone]

Hey, just a quick question hijack on the topic, will an incorrect afm throw a cel? Dad and I put the 2l into his bg7 and took nthe 2.2 put in the ecu from the 2l aswell, but only had another afm for an ej18 rather than the ej20 gone into it. The motor was on a manual so it is still using the old inlet(auto throttle body and stuff) and injectors, could they cause this also? Sorry for the hijack lol- car runs fine, needs some moar oil, but otherwise fine, going to try swapping around different afm's though, have a couple lying around-what they go to, I've no idea.

Sent from my GT-I5510 using Tapatalk

[X]

if u using the wrong afm the ecu will usually go in a limp mode

[94 Leone]

Its n/a so it doesn't have the same detonation failsafes afaik?

[STiNGR]

 subypower said:

What sort of oil should I use and how much for a oil change?

I would reccomend using the fully synthetic genuine subaru parts oil. Good pice also. Think I paid about $70 for 5L for Armstrong subaru in CHCH

[Stoffa]

If your gonna spend that much on oil, castrol edge 10w60 is great $70-$90 for 5 litres

thats what im gonna use in my new engine

[BC5RA]

 Stoffa said:

If your gonna spend that much on oil, castrol edge 10w60 is great $70-$90 for 5 litres

thats what im gonna use in my new engine

I wouldn't run 10w 60 in Hydraulic lifter type heads.

Factory recommend 10w30 or 10w40; I'd go with a 10w40 or 5w40.

[Stoffa]

 BC5RA']

[quote name='Stoffa said:

If your gonna spend that much on oil, castrol edge 10w60 is great $70-$90 for 5 litres

thats what im gonna use in my new engine

/quote]

I wouldn't run 10w 60 in Hydraulic lifter type heads.

Factory recommend 10w30 or 10w40; I'd go with a 10w40 or 5w40.

let me guess, you think its too thick?

10w60 is no thicker than 10w40 it just handles the heat better

[BC5RA]

 Stoffa said:

let me guess, you think its too thick?

10w60 is no thicker than 10w40 it just handles the heat better

That's correct. I thought you were clued up Stoffa?

Why don't you explain to everybody why you recommend 10w 60?

[johnny5]

I use 10w 60 good stuff

[Stoffa]

I'm reasonable clued up,

and this is the very simplfied version that was explained to me....

the number before the W i.e the 10 is reference to viscosity of the oil when its cold, or how it acts when cold.

if the first number (i.e 5w..)is lower then the oil acts thinner when cold than a 10W..

and the second number is how well the oil holds its viscosity at high temps so a 10w60 can run hotter for longer than a 10w40 without breaking down.

I've got a good mate who has a v2 wrx and now owns a v7 sti, he has used edge 10w60 in both cars, the v2 he put over 100,000kms on it while he owned it and never had a problem with hydraulic lifters, he uses it now in his v7 and has never had problems with the AVCS.

anyway I recommend running castrol edge more than I recommend runing 10w60, but if money was no option I'd run Motul 10w40 300V

[Koom]

 Stoffa said:

and the second number is how well the oil holds its viscosity at high temps so a 10w60 can run hotter for longer than a 10w40 without breaking down.

The second number is the viscosity at a standard operating temperature and is rated by how long it takes a standard amount of oil to flow through a standard orifice at a standard temperature (to quote Wikipedia).

So a particular 10w60 oil "may" be able to handle higher temps better than a particular 10w40 but it is still going to be thicker than the 10w40 at normal temps. This may not cause an issue at all, and is up to the end user as to whether they want to use it or not.

[BC5RA]

 Koom said:

The second number is the viscosity at a standard operating temperature and is rated by how long it takes a standard amount of oil to flow through a standard orifice at a standard temperature (to quote Wikipedia).

So a particular 10w60 oil "may" be able to handle higher temps better than a particular 10w40 but it is still going to be thicker than the 10w40 at normal temps. This may not cause an issue at all, and is up to the end user as to whether they want to use it or not.

Agreed, and in my mind a 10w60 could pump up the lifters. A personnel choice/recommendation specific to the car.

[Stoffa]

my bad

disclaimer: all my knowledge is self gathered, no mechanical training involved.