Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[feeutfo]

The Rover V8 had hardened seats as of October 1970, before this only the low compression power plants (8.25:1 - Note compression ratio is stamped next to the engine no) were unleaded capable (designed to run on 94 RON!).

I will  ask him and see if we can find out a bit more.  Only thing he is sure of is the car was built in 1988, does that make it a classic? Anyway, sainburys in Epsom stopped selling lrp apparantly, i will pass on everyones advice, see if we can get to the bottom of it and find the engine number. He used an additive in the end, and the beast roared into life first turn of the key after standing for a while. Hes well happy. Just hope it passes Mot now.
Thankyou gents, top work as always.  

[Marks DTM Calib]

The Rover V8 had hardened seats as of October 1970, before this only the low compression power plants (8.25:1 - Note compression ratio is stamped next to the engine no) were unleaded capable (designed to run on 94 RON!).

I will  ask him and see if we can find out a bit more.  Only thing he is sure of is the car was built in 1988, does that make it a classic? Anyway, sainburys in Epsom stopped selling lrp apparantly, i will pass on everyones advice, see if we can get to the bottom of it and find the engine number. He used an additive in the end, and the beast roared into life first turn of the key after standing for a while. Hes well happy. Just hope it passes Mot now.
Thankyou gents, top work as always.  

Chris, get the engine number and compression ratio which is stamped onto the block and post it up, I can then tell you if its 'unleaded capable'

[feeutfo]

The Rover V8 had hardened seats as of October 1970, before this only the low compression power plants (8.25:1 - Note compression ratio is stamped next to the engine no) were unleaded capable (designed to run on 94 RON!).

I will  ask him and see if we can find out a bit more.  Only thing he is sure of is the car was built in 1988, does that make it a classic? Anyway, sainburys in Epsom stopped selling lrp apparantly, i will pass on everyones advice, see if we can get to the bottom of it and find the engine number. He used an additive in the end, and the beast roared into life first turn of the key after standing for a while. Hes well happy. Just hope it passes Mot now.
Thankyou gents, top work as always.  

Chris, get the engine number and compression ratio which is stamped onto the block and post it up, I can then tell you if its 'unleaded capable'

Ok here we go. Eng. No. 39A00476. Unfortunately "we" seem to be having trouble understanding the compression ratio bit. I think the numbers came from the log book tbh. I will have to see if i can find it on the block next time i am over there. It passed Mot by the way. Hes been hooning round on the Epsom downs.

[Marks DTM Calib]

Not to worry, I can now reveal...

39Axxxxx - 3.5 SD1 Factory recon 9.35:1 cr 1982-87.

So, fine for unleaded and probably around the 160bhp ish mark on SU's

[feeutfo]

Not to worry, I can now reveal...

39Axxxxx - 3.5 SD1 Factory recon 9.35:1 cr 1982-87.

So, fine for unleaded and probably around the 160bhp ish mark on SU's

Bloody hell, how on earth did you find that lot out?
Well thats great news anyway,so he can just fill it up with optimax and get back all those missing ponys? No need to play with the timing or anything? If its putting out 160 ill eat my hat. Its got side exit exhaust iirc, maybe not quite breathing as it was designed?
Ps whats are SU's?

[Marks DTM Calib]

Not to worry, I can now reveal...

39Axxxxx - 3.5 SD1 Factory recon 9.35:1 cr 1982-87.

So, fine for unleaded and probably around the 160bhp ish mark on SU's

Bloody hell, how on earth did you find that lot out?
Well thats great news anyway,so he can just fill it up with optimax and get back all those missing ponys? No need to play with the timing or anything? If its putting out 160 ill eat my hat. Its got side exit exhaust iirc, maybe not quite breathing as it was designed?
Ps whats are SU's?

SU carbs.....

Unless its injection, which I would be surprised

[feeutfo]

Not to worry, I can now reveal...

39Axxxxx - 3.5 SD1 Factory recon 9.35:1 cr 1982-87.

So, fine for unleaded and probably around the 160bhp ish mark on SU's

Bloody hell, how on earth did you find that lot out?
Well thats great news anyway,so he can just fill it up with optimax and get back all those missing ponys? No need to play with the timing or anything? If its putting out 160 ill eat my hat. Its got side exit exhaust iirc, maybe not quite breathing as it was designed?
Ps whats are SU's?

SU carbs.....

Unless its injection, which I would be surprised

Carbs fairly sure, but no adjustments required? Just fill it up and away you go? No reason why the builder would say use 4 star knowing it will take unleaded?
Wonder if he may have fiddled with it to get it in that chasis?

[Marks DTM Calib]

Not to worry, I can now reveal...

39Axxxxx - 3.5 SD1 Factory recon 9.35:1 cr 1982-87.

So, fine for unleaded and probably around the 160bhp ish mark on SU's

Bloody hell, how on earth did you find that lot out?
Well thats great news anyway,so he can just fill it up with optimax and get back all those missing ponys? No need to play with the timing or anything? If its putting out 160 ill eat my hat. Its got side exit exhaust iirc, maybe not quite breathing as it was designed?
Ps whats are SU's?

SU carbs.....

Unless its injection, which I would be surprised

Carbs fairly sure, but no adjustments required? Just fill it up and away you go? No reason why the builder would say use 4 star knowing it will take unleaded?
Wonder if he may have fiddled with it to get it in that chasis?

The most you might need to do is back the ignition off (turn the dizzy) a few degrees if it pinks. But, from my experience, the timing is often set so retarded that its not needed

[feeutfo]

Not to worry, I can now reveal...

39Axxxxx - 3.5 SD1 Factory recon 9.35:1 cr 1982-87.

So, fine for unleaded and probably around the 160bhp ish mark on SU's

Bloody hell, how on earth did you find that lot out?
Well thats great news anyway,so he can just fill it up with optimax and get back all those missing ponys? No need to play with the timing or anything? If its putting out 160 ill eat my hat. Its got side exit exhaust iirc, maybe not quite breathing as it was designed?
Ps whats are SU's?

SU carbs.....

Unless its injection, which I would be surprised

Carbs fairly sure, but no adjustments required? Just fill it up and away you go? No reason why the builder would say use 4 star knowing it will take unleaded?
Wonder if he may have fiddled with it to get it in that chasis?

[Marks DTM Calib]

Not to worry, I can now reveal...

39Axxxxx - 3.5 SD1 Factory recon 9.35:1 cr 1982-87.

So, fine for unleaded and probably around the 160bhp ish mark on SU's

Bloody hell, how on earth did you find that lot out?
Well thats great news anyway,so he can just fill it up with optimax and get back all those missing ponys? No need to play with the timing or anything? If its putting out 160 ill eat my hat. Its got side exit exhaust iirc, maybe not quite breathing as it was designed?
Ps whats are SU's?

SU carbs.....

Unless its injection, which I would be surprised

Carbs fairly sure, but no adjustments required? Just fill it up and away you go? No reason why the builder would say use 4 star knowing it will take unleaded?
Wonder if he may have fiddled with it to get it in that chasis?

Not much he could fiddle with that would affect its ability to run on unleaded!

[feeutfo]

Not to worry, I can now reveal...

39Axxxxx - 3.5 SD1 Factory recon 9.35:1 cr 1982-87.

So, fine for unleaded and probably around the 160bhp ish mark on SU's

Bloody hell, how on earth did you find that lot out?
Well thats great news anyway,so he can just fill it up with optimax and get back all those missing ponys? No need to play with the timing or anything? If its putting out 160 ill eat my hat. Its got side exit exhaust iirc, maybe not quite breathing as it was designed?
Ps whats are SU's?

SU carbs.....

Unless its injection, which I would be surprised

Carbs fairly sure, but no adjustments required? Just fill it up and away you go? No reason why the builder would say use 4 star knowing it will take unleaded?
Wonder if he may have fiddled with it to get it in that chasis?

Not much he could fiddle with that would affect its ability to run on unleaded!

Right, home from work now, thank god. Sorry, i should have made myself more clear, bloody machine was playing up and i could not concentrate on the important stuff like cars.
 I had a 600 race/track bike(bare with me) and took it for set up on a Dyno with a carb kit and a panel filter to take full advantage of the full Muzzy race system, a basic stage 1 tune. They said to run it on 4 star/lrp for the octane rating or failing that shell optimax then Super and last on the list was unleaded, for the
Octane rating.(never fully understood why, they just said bigger bangs,so that was good enough) So, bearing in mind there may not be a Standard air box on the rover v8, probably a k and n on a twin choke or similar purely to fit under the double sided bonnet(hinge down the centre job iirc) and the exhaust is def. more free flowing, i suspect it may have had to have been tuned to run with those inlet and outlet parts and there for the tuner may( or may not, dont know) have said to the builder it will run better on 4 star. Then the builder may have said to Dad to run it on 4 star and Dad, as sounds likely, not knowing the motor, presumed due to the age, that it would 'only' run on 4 star.I would be suprised if the builder did not know it would run on unleaded. So, having established it is possible to run on unleaded  (or has the ability as you rightly say) the question remains,for me at least, should we? Without knowing the state of tune of the engine? Given the probs getting 4star/lrp i wonder if optimax or similar would be more suited? Will speak to Dad and see what he has with the documentation, a bloody great folder of stuff apparently. This could take a while.  
  My knowledge does not cover what difference the fuels will make to the engine tune. I suspect on an unleaded capable engine, only an unnoticeable drop of a few bhp when going from 4star to unleaded? So thats really where i was coming from, probably a bit too belt and brases? Cheers.

[Marks DTM Calib]

Yes you should run it on unleaded.

Yes, a higher octane fuel will help it (a bit) but, its not mega highcompression by any strectch of the imagination and its not blown so no physical reason to avoid standard unleaded at all.

The only thing that will dictate the reaons to use leaded petrol is the valve seats, nothing else affects it.

If hes so worried about loosing power (he wont notice) then use super unleaded so the octane rating is the same or better than leaded.

[feeutfo]

Yes you should run it on unleaded.

Yes, a higher octane fuel will help it (a bit) but, its not mega highcompression by any strectch of the imagination and its not blown so no physical reason to avoid standard unleaded at all.

The only thing that will dictate the reaons to use leaded petrol is the valve seats, nothing else affects it.

If hes so worried about loosing power (he wont notice) then use super unleaded so the octane rating is the same or better than leaded.

Hes not worried, hes delighted in fact. Its just me not fully understanding the issue, with my lack of experience. Thanks for taking the time and patience to explane it all, very very much appreciated. Will see if i can post up a pic. Got to delete the no. Plate not done that before. Thanks again Mark.

[feeutfo]

Dads motor, and a happy Dad, for your viewing,its a mobile pic so sorry about the quality.
Thanks again everyone for all your help, much appreciated, as usual Mark gets the gold star for effort ,thoroughness and an incredible knowledge,as if he hasnt got enough stars already. Mark, what is it with you and Rover anyway?
Cheers all.