starting to love my 318i more than my 325i balance v power.

[Royalratch]

Well dodge...

[hennared323i]

You lot sound like my safety department....

Yep, that's wrong



So what are the correct weights then?

(safety dept answer is - that's not our job.......)

[povertyspec]

technical specs and engines aside my point was that the standard 318i is a very entertaining drive. its not that good in any area other than being quite sporty for the 80's and having lightweight dynamics by modern standards, the fact that its worth bugger all allows me to chuck it about without worrying. its just such hairy little chariot to throw about on c roads. i used to think it was a big car when i was young but these days its clown car size next to a Focus. obviously a well driven Golf GTI mk 7 will trounce my E30 but on a good day with an average driver in the Golf you can still pass a car with double the horses on 30 year old mechanicals, an E30 driver is usually a better driver. (and he cant rely on brakes to get out of trouble!!)

[DanThe]

I dont weigh engines TBH, but if you have ever lifted these engines by hand with a mate you soon realise whats an anchor and whats not!

[jon-m42]

Is there really a difference between using shell v power to any regular fuel i.e. Tesco, Jet etc.

I normally use Tesco fuel and have on a few occasions used shell v power but I did not really find a noticeable difference in power and or performance, perhaps a few more miles but thats about it.

Has anybody else benefited from using the more premium end fuels. ?

is there a difference which adds to performance and power?

Something tells me that regular fuel is quite possibly the best for the engine as the the age of the car would see no significant improvements with these new fuels i.e. shell v power. I may be wrong just speculating.

Jon

[87mtech27]

I suspect the S50 listed might be the S52US motor hence the major weight difference on Unixnerd.

[87mtech27]

You might gain 0.5bhp increase at most going from tesco fuel to shell v power a˜†. There was a test on fifth gear a while back with the conclusion it isn't worth it.

Your imagination will kick in tho to add a further 10bhp on top of that a˜Ž

[87mtech27]

You might gain 0.5bhp increase at most going from tesco fuel to shell v power a˜†. There was a test on fifth gear a while back with the conclusion it isn't worth it.

Your imagination will kick in tho to add a further 10bhp on top of that a˜Ž

[pacerpete]

You might gain 0.5bhp increase at most going from tesco fuel to shell v power a˜†. There was a test on fifth gear a while back with the conclusion it isn't worth it.

Your imagination will kick in tho to add a further 10bhp on top of that a˜Ž

As a M42 owner, he will have a vivid imagination !

[povertyspec]

i also run 2 stroke bikes and the premium octane petrols help the engines burn cleaner.on a rolling road the HP increase is negligable but the throttle response "feels" crisper. i run my 318i on supermarket budget fuel which contains ethanol and makes the engine run hotter and leaner than 10 years ago i think.

[reggid]

I suspect the S50 listed might be the S52US motor hence the major weight difference on Unixnerd.

still no way the difference is 65kg.

to imagine how much this is a M20 bare cast iron block weights around ~40kg, b25 crank ~22kg

[jimbom30cab]

M30 = 143kg - yer for the block only. Fully dressed up i would say double that. Let's put it this way. A fully built M30 is flippin hard graft to crank up on the engine crane and the arm has a bow downwards. With an M52 or M40 it's light work.

[Brianmoooore]

i run my 318i on supermarket budget fuel which contains ethanol and makes the engine run hotter and leaner than 10 years ago i think.

That'll be down to the clapped out injectors and assorted minor air leaks on the inlet side, rather than the fuel!
How do you know that the chamber temps. are higher, anyway?

[reggid]

id says its more the coolant system being shagged

[HairyScreech]

I suspect the S50 listed might be the S52US motor hence the major weight difference on Unixnerd.

still no way the difference is 65kg.

to imagine how much this is a M20 bare cast iron block weights around ~40kg, b25 crank ~22kg

Yes and if you have made the mistake of taking a complete M20 bottom end off an engine stand unassisted you REALLY have an idea of what the lump weighs.

To be fair those posted weights are all over the place.

The M5x ones are comparable but the M20/4x/30 ones are likely not.

A huge amount of the weight of the M20 comes from the accessories. The cast alu manifold is about 3 times the weight of the later plastic ones, the alternator is a tank compared to a modern one. The exhaust manifold is a door stop. There's 3kg in the flywheel. The AFM if a brick.

There's no reason an M20 could not be made as light as a stock M40.

[povertyspec]

i run my 318i on supermarket budget fuel which contains ethanol and makes the engine run hotter and leaner than 10 years ago i think.

That'll be down to the clapped out injectors and assorted minor air leaks on the inlet side, rather than the fuel!
How do you know that the chamber temps. are higher, anyway?

yeah, im sure the engine is tired and incontinent but as a daily smoke i just top up the essentials,service and hope. the engine feels hotter on bonnet release by instinct but the temp gauge still runs half way or thereabouts. whats for sure is there arent many untouched unrebuilt 90's cars made on the same day as my 318i trying to do fast runs on the snake pass. good work in the BMW development department i say. the 325i feels a heavier chunk into the corners and not quite so "nimble". if my 318i was fully refreshed in the running gear area i pick it every time over the grunt.

[Royalratch]

I quite like the idea of battered but sound 318i shed to rip around London without the worry of it getting rained on or bumped retards.

I came out to my iS the other day and someodboy had hit the rear number and cracked the rubbing strip

Now I have to delve into my parts bin for no reason at all”¦!

[HairyScreech]

Actually looking at fully built engine weights from here....

and taking into account a G240 transmission is about 35kg with shift linkage.

http://www.r3vlimited.com/board/showthread.php?t=99913
M20 = 180.3 kg = 397.49 lbs

http://vorshlag.smugmug.com/Projects..._w3v4X-M-1.jpg
M42 + 5 speed Getrag transmission = 419lbs + 8lbs intake = 427lbs
Removing the gear box = 427lbs - 77lbs = 350lbs or 159kg.

So 20kg difference between the lumps as installed.
Power to weight is pretty much the same for each at 0.91:1 (being generous and giveing the 4 pot 145hp and the 6 pot 165hp)

Don't know if that makes the m20 seem light or the M42 seem heavy.

Certainly makes an m20 that has been on a diet or an m52 seem much better though.