What stops an engine revving?

[Lee Flintoft]

Maybe it's trying to tell you something, stop drivin me like a twat.

[2F45T4U]

Yer I think its saying something along the lines off "please take me off the road for a million years to paint me shiny colours" . No... I think its saying "Wooo hooo lets do that again!"

Anyway its my car and as I'm not hurting any one and doing my fair share of keeping Dolomites on the road (and most importantly seen!) I think I can do pretty much whatever I want




Weeeeeee

[Jon Tilson]

First points of call if it wont rev...

Then check dizzy advance. If its stuck it wont rev. Unlikley on the delco dizzy, which usually advances a tad early as the springs go weak.

Fuel supply...and throttle linkage is included in this.
Weak spark at higher rpm...change coil?

So its it fixed now? The willing 60 in 2nd is always a good test.


Jonners

[tinweevil]

Thats a hell of an interesting read Lewis. If I've got my brain round VE correctly VE is always 100% at revs below an engines peak torque, is that correct? I'm assuming it is not possible to build inlet systems so shite that the cylinder can never fully fill even at low revs. Hmmm, I don't think I have got it fully yet because the way I'm thinking you would always need to state the revs when stating VE. What have I missed?

Tinweevil

[Sprint36]

VE is less than peak value at rpm below peak torque rpm as well as above. There are many reasons but just as an example, inlet valve closes after BTDC. At low rpm this results in flow reversal as the piston starts on the compression stroke before the inlet valve is closed and pushes some air back out. At higher rpm the momentum of the incoming air continues to fill the cylinder after the piston has started back up the bore. So cylinder filling is better at a certain rpm defined by inlet valve closing position and worse either side. Before I get jumped on about exhaust timing and inlet opening and port length etc, I did say this was just one example.

David

[andyk]

just a qiuck one get the alternator checked out as the diode pack could be on the way out, at low revs will feed the car and the battery at high revs it will fail so the car is running of the battery which is not able to supply the voltage needed at high revs for long as the revs drop the diode pack comes back on line hence it always starts in the morning
hope this helps
andy

[Mr.Speedy]

Doesn't the rotor arm have a rev limiter in it?

Maybe that's gone tits up!

[george]

nop they didn't fit them to any dollys and i aven't seen one for many a year most have had the springy bit removed anyway

[2F45T4U]

Yer so to clear it up, it was the points gap.

It's going well now. Richards got his Micra back on the road and I'm forever annoying him by just driving away from him with light applications of the throttle

And talking of throttle....

[Jon Tilson]

your grills back in Adam...

They are there to stop debris damaging your radiator. Looks like they would be useful on that sort of kick ass terrain...

Yee Haa...

Very Dukes of Hazard...

Jonners