NOT850 wrote:
Torque is my main aim for the engine. Nearly everyone says that the 1098 shouldn't be revved over 6000rpm.
Hi Not850
The problem with the rumour about not revving 1100 past 6000 RPM was started by David Visard when he wrote in his book and put the fear of god in every body,ask him how much testing and development he has done with the 1100 and you'll find very little.
I'v been building these motors for a long time and I have NEVER broken one yet,but I have broken 998 cranks, the problem is people tell how they have broken or cracked an 1100 crank but never seem to mention when they have broken a 998 crank.
We run 1100 cranks to 8000 rpm in a lot of engines be it mini's, sprites or open wheeler race cars, like any thing put it together right and it will be reliable, if you are going to abuse your engine you will break it no mater what motor it is be it an 850 998 1100 or cooper s, just ask around about how many people have broken or cracked Cooper S and i'll bet there is more "s" cranks broken than 1100, and yet they have a shorter stroke and bigger mains giving it more over lap.
The thing with a mini is if you are going to make a performance engine be it a fast road car or a race car the lighter the flywheel the better of you are, on my fast road cars
I like to use the MINI SPARES ultra light one with the light backing plate, and no I don't find it to light on the road, the thing that does a lot of damage is on and off the throttle at high RPM resulting in the crank twisting back and forth, hence this is where the light fly wheel helps.
These little 1100 are a great little motor don't be afraid to build one and give it a buzz.
If you are attending the Mini Kingdom Online show & shine on the 27Th you can check the flywheel & back plate
out, they will be on display
Graham Russell
