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What Petrol
Posted: Sat Jul 03, 2004 1:21 pm
by Ralf the RR
Went to fill up yesterday with LRP as I always have.
Most servos now don't stock it.
Tried 4 servos, and ended up at Woolworths+, where they had one pump only.
Since the heads are alloy, I assume they have hardened valve seats.
So will it run on unleaded?
Or is premium unleaded the go?
I checked a web site that said a low compression Rover engine is OK.
So is an 80 RR a low compression engine?
Also have a 79 4.4.
What fuel can it run on?
Posted: Sat Jul 03, 2004 1:34 pm
by GRIMACE
You can run regular unleaded and buy a fuel additive for it from supercheap/autobarn or even some servos
petrol
Posted: Sat Jul 03, 2004 1:47 pm
by Loanrangie
Most early rangies are low comp 8.13/ 1 so reg unleaded is fine, some swear by premium but i dont find any difference. Maybe a h/comp will make more use of premium. Dont waste your money on an additive unless you have over 10/1 compression.
Posted: Sat Jul 03, 2004 1:59 pm
by GRIMACE
That is great info if it is the case I think HSV should put a note in the tech section saying older low comp rangies can us regular unleaded
Re: petrol
Posted: Sat Jul 03, 2004 2:57 pm
by RaginRover
Loanrangie wrote:Most early rangies are low comp 8.13/ 1 so reg unleaded is fine, some swear by premium but i dont find any difference. Maybe a h/comp will make more use of premium. Dont waste your money on an additive unless you have over 10/1 compression.
I am 99% sure that there were no High compression rangies delivered to australia - are fuel was too shite - unless it has been modified you can assume low comp.
The old 3.5L V8 can virtually run LRP, Unleaded and Premium.
The 3.9L and 4.0L rangies and discos don't enjoy running on optimax as they tend to burn exhaust valves as I am told through our club
so stick to 91 Ron regular unleaded for them
Tom
Posted: Sat Jul 03, 2004 3:59 pm
by landy_man
my 84 aus built rangie is 9.35 compression ratio.... check on your heads... IIRC the compression ratio is stamped on there somewhere
Posted: Sat Jul 03, 2004 4:00 pm
by RaginRover
landy_man wrote:my 84 aus built rangie is 9.35 compression ratio.... check on your heads... IIRC the compression ratio is stamped on there somewhere
Yes that is right I meant to say that in my post but forgot !
Thanks Landy
Tom
Posted: Sat Jul 03, 2004 4:54 pm
by Ralf the RR
landy_man wrote:my 84 aus built rangie is 9.35 compression ratio.... check on your heads... IIRC the compression ratio is stamped on there somewhere
Well this info is excellent!
Anyone know where the stamed info is?
Posted: Sat Jul 03, 2004 4:56 pm
by landy_man
IIRC it is on the passenger side rocker cover
Posted: Sat Jul 03, 2004 5:05 pm
by Ralf the RR
What about a P76 4.4L?
Can it run Unleaded?
(Yes we are stupid enough to have 2 Rangies.)
Rex is the yellow one pictured (wife's).
Mine is called Ralf. He is a 79 model, 4.4, white with flares, lifted, and other stuff. (A mans RR
)
Posted: Sat Jul 03, 2004 6:10 pm
by Bush65
My 84 rangie had original stickers that said high compression ratio.
From what I could find out the valves and seats are OK with unleaded.
Mine runs better on lead replacement though. Most Caltex servos have lrp.
Posted: Sat Jul 03, 2004 6:47 pm
by Ralf the RR
Bush65 wrote:Most Caltex servos have lrp.
Have you checked lately?
The 3 other servos I went to stopped selling LRP as of 1 Jul.
Posted: Sun Jul 04, 2004 1:55 am
by peter r
.Peter
Posted: Sun Jul 04, 2004 4:46 pm
by Aquarangie
I noticed on all early 3.9's they are all 8.13 CR, but my 93 Discovery 3.5 was 9.35. Top end performance was not far off the 3.9, but the mid-range torque was the big diffrence in both engines.
Just an obsevation.
Trav