Mark Larkham Explains "Engine Servicing" In V8 Supercars

Mark Larkham visits KRE Race Engines in Queensland for a behind the scenes look on how V8 Supercar engines are serviced in between events.

[@beagle7622]

Always liked this guy, certainly a great commentator and knows what his talking about. Agree with him on the V8 sound.

[@briandavis414]

Aww C'mon, can't you build them a little more reliable?? Where is the water/coolant jackets?? Are there any?? What about full round on the crank... you know the LT500 is faster than the banshee... and it's power band is smooth, not snappy... that's just because of the full round on the crank... perfectly balanced... What's the firing order on the pistons? that would make a big diffrence if it is out of "balance"....?

[@gordowg1wg145]

Wow, this is an old video clip. David - engine regulations, for example the engine is limited to 7500 rpm, 5 litres, 2 valves per cylinder and 'production' engine designs - so a little over 600hp is pretty darned good... Now, about the 400hp V6 - some details please as I bet they aren't as restricted. Carling - under load it was around 0.9 lambda, that corresponds to ~13.2 AFR (petrol/gasoline - I think they were already using E85 by then, which would be different, of course) which is around the 'best power' area. Different engine configurations may be a little richer or leaner for best power. Brian, perhaps you should actually learn something about engines... you are just talking crap. However, to address the first point, the only sensible one, these engines are very reliable and the 3k 'service', or rebuild, is for two main reasons... a/ the engines are more highly stressed than your road engines and, as such, some parts have a service life after which they may fail (look up 'fatigue failure' for the reason) and regular replacement is done to ensure they do not fail in a race and not only cost them a result but do a lot more damage as a result of the failure (for example, look up dropped valve''on KZbin). b/ the engines wear and as the rings wear they do not seal as well (look up 'blowby'or 'ring leakage'), similarly, as the valve seat area wears it may not seal as well and may not flow the gases around them as well. Nowadays roller camshafts and followers have largely eliminated it, but with some engines camshaft wear is also a problem.

[@ayrtonhockaday]

Handmade.... On a mill... Lol

[@carblingautomotive]

lambda looks to rich on dyno run, maybe to hide those last few hp from the oposition

[@mareksumguy1887]

+carblingautomotive Its a race car... its always gonna be richer than street application.