carb damper oil
Turbo Mini Forums

how much oil should i put in there?which oil?i use hif 44 carb. is it depend on the spring?

very difficult to say what oil, depends on the engine spec etc.

im wondering this myself atm

i believe most use engine oil tbh, i.e. 50wt

but some say sewing machine oil is best, or 3 in 1, others hydraulic oil, you can even buy specific "SU oil" from burlen

in my mind, just try what you have got to hand, then just trial and error to see what gives better throttle responce

bear in mind synthetic oil will be more stable through the various temp ranges the carb will endure, whereas mineral's characteristics change a fair bit at extreme temps

tbh though, ive never found a carb ''too hot to touch, so doubt it really matters all that much (although mineral might be a tad thick when very cold?)

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

Edited by MarkGTT on 2nd Oct, 2009.

I have found that you need thicker oil with boost too, I use similar to Mark.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

Good results with Valvoline VR-1 20W/50 engine oil in mine.

Richard.

Minivanless, but reluctantly happy living with the decision. There'll be another one day.
http://www.youtube.com/profile?user=minimadmotorman#p/u

so 3in1 oil ist thick enough for turbo carb?

Edited by Brett on 2nd Oct, 2009.

Yes i moved to the darkside

Instagram @jdm_brett

Am I the only one that uses genuine SU oil then? It seems to work well on the n/a daily, will have to see about the turbo

I just use the same as goes in the engine. I suppose it all depends on what it has been tuned with in the first place.

I tried genuine SU oil - never could get it to work with the turbo. Ended up using the nice bottle the SU oil came in and Engine oil.

Genuine SU oil is 20wt.

Basically any oil will do but you need to have a complementary needle profile so 20/50 is a good bet, its a little thicker which helps with the turbo. Thin oil is used by N/A racers to speed up the throttle response, but they have to reprofile the needle to suit it and that causes compromises that are not usually acceptable on a road car.

Terry

website:- http://www.terryhunt.co.uk

Hi Terry, i found you needle profiling tips and extensive 'step by step' guide very helpful when setting up my carb. (thanks)

the throttle response on mine seems ok.. but looks like i tend to use a much thicker oil than most, would you suggest experimenting with something thinner and re-profiling the needle a bit more??

is this likely to make improvments?

Edited by MarkGTT on 2nd Oct, 2009.

Ive heard brake fluid is good but Ive never tried it

Paul

I seriously doubt it!

I found its the heat and then the cold that effected the oil and then the mixture.

no such issues with the bike carb.

I run a supercharger and I don't care the TB is on the wrong side.
VEMS + 12 PSI + Liquid Intercooler = Small Bore FUN!

website:- http://www.terryhunt.co.uk

website:- http://www.terryhunt.co.uk

I dont know but it would go from very think to very thin. I tried all sorts of stuff. even the millers CTV as I was thinking it could take the heat better.

IMO the bike carb is a better design, but it is newer, the fact you dont need oil also means you never need to top it up. Even with a NOS piston, dash pot and plunger it would use oil, depending on how I drove the car. The problem I had was it would hesitate all of a sudden and then I would be checking everything again, like has the choke seals gone, is there oil in the dash pot, needle, etc. For a novice like me it would do my head in.

Then again the bike carb isn't turbo friendly its just that I can use an N/A version, due to my conversion.

All I can say is the car has been much better on the KVP carb.

But then like everything is all getting old and you need to keep stuff in good condition.

What ever suits your application best.

I run a supercharger and I don't care the TB is on the wrong side.
VEMS + 12 PSI + Liquid Intercooler = Small Bore FUN!