Oil pressure for 20/50
Discussion
4 bar is too high - that's 56 p.s.i.
However you will get that high when the engine isn't warmed up as it defeats the oil relief valve. I get 50 p.s.i when cruising at 3000 rpm and still under 80C engine temp. It drops to around 30 p.s.i when fully warm.
If it's 4 bar sustained then you will put a lot of strain on the oil pump drive - wearing the drive gears to the dizzy and eventually the timing will retard (or if you're unlucky like Chedder the gears will strip off.)
However you will get that high when the engine isn't warmed up as it defeats the oil relief valve. I get 50 p.s.i when cruising at 3000 rpm and still under 80C engine temp. It drops to around 30 p.s.i when fully warm.
If it's 4 bar sustained then you will put a lot of strain on the oil pump drive - wearing the drive gears to the dizzy and eventually the timing will retard (or if you're unlucky like Chedder the gears will strip off.)
Dix,
4 bar is 58 psi so spot on for an RV8 over 1500 rpm.
Mine runs at 65 psi on 20w/50 over 1500 rpm, dropping to 40 psi at hot idle.
A bit higher than yours because I have a double oil pressure relief spring.
Sounds like you have a fit engine to me.
Dave.
PS: Remember, the OP gauge in a TVR is not the worlds most accurate instrument
4 bar is 58 psi so spot on for an RV8 over 1500 rpm.
Mine runs at 65 psi on 20w/50 over 1500 rpm, dropping to 40 psi at hot idle.
A bit higher than yours because I have a double oil pressure relief spring.
Sounds like you have a fit engine to me.
Dave.
PS: Remember, the OP gauge in a TVR is not the worlds most accurate instrument
Edited by Chimpafrolic on Tuesday 5th July 19:32
Chimpafrolic said:
Dix,
4 bar is 58 psi so spot on for an RV8 over 1500 rpm.
Mine runs at 65 psi on 20w/50 over 1500 rpm, dropping to 40 psi at hot idle.
A bit higher than yours because I have a double oil pressure relief spring.
Sounds like you have a fit engine to me.
Dave.
PS: Remember, the OP gauge in a TVR is not the worlds most accurate instrument
Those numbers are way too high for an RV8 Wedge. You sure you're not using data from one of them new fangled serp engines?4 bar is 58 psi so spot on for an RV8 over 1500 rpm.
Mine runs at 65 psi on 20w/50 over 1500 rpm, dropping to 40 psi at hot idle.
A bit higher than yours because I have a double oil pressure relief spring.
Sounds like you have a fit engine to me.
Dave.
PS: Remember, the OP gauge in a TVR is not the worlds most accurate instrument
Edited by Chimpafrolic on Tuesday 5th July 19:32
I run 15W 50 and hot idle is around 25psi, over 2.5K rpm is 40psi - from a proper gauge, not the standard unit.
Number 7 said:
Those numbers are way too high for an RV8 Wedge. You sure you're not using data from one of them new fangled serp engines?
I run 15W 50 and hot idle is around 25psi, over 2.5K rpm is 40psi - from a proper gauge, not the standard unit.
Yes I have a new fangled Serp engine, sorry chaps forgot you lot are a few years older I run 15W 50 and hot idle is around 25psi, over 2.5K rpm is 40psi - from a proper gauge, not the standard unit.
Number 7 said:
My old 350i actually had a sticker on the screen (I assume from the factory) waning not to exceed 2.5K rpm until the engine was hot (WARM iirc).
Mine has still got the sticker and I stick to it religously, although engine temp gauge never seems to get above 70 degrees....Gassing Station | Wedges | Top of Page | What's New | My Stuff