Tuscan to Caterham

[Mars]

There's a difference in flexing before it's bolted down and flexing which causes long-term wear problems. I'm only pointing to the evidence of a few medium-milers which seem to be operating well.

[V7SLR]

I'm running Mars' old 1900 K-Series - 244bhp, 1444 cams. With so much power on tap (peak power at a fraction under 8000rpm), to ensure some engine longevity I've chosen to reduce the maximum rev hard and soft cut in the Emerald programming by around 500rpm. By 6000rpm the engine is already up to 200bhp therefore depending upon your need for power (track/road/competition etc) there is the option available to "nurse" the engine somewhat (nor sure that's the correct term though!).

Stuart - I don't have anything like as much K experience as some of you guys, but Mars does make a good point in that the torsions in the castings that cause the K to "seize" with the head off, are completely different to flex during use.

Stu.

[Dave J]

theres a chap round here that takes great delight in his crossflow that revs to 9700 rpm and makes a claimed 190bhp.

The engine cost circa £13K and has to be rebuilt every year or so.

I asked him why he doesnt move on a decade or tow and fit a Zetec or a Duratec and half his costs and get more power ??>

he answer is that the crossflow is a great engine that makes reliable power and other modern engiens dont have the charater of the crossflow .

I just think he is stuck in a previous year and staunchly defends the lump to the end despite the clear disadvantages?