Originally Posted by vroooom ptssssh
When tuning an engine (without any internal mods) your not raising it's mechanical limmit! it's not on it's mechanical limmit to start with if it can be made faster without touching the internals
Dave, I'm trying to educate you, you twat!
EVERY car will benefit from a remap but after that, you are on the engines VE limit. You then HAVE to start improving it's VE to get it to make more power, meaning mechanical changes.
Originally Posted by vroooom ptssssh
I didnt know about the zetec being under more stress, but as far as im concerned, if it can take much more power when worked, it's a stronger engine and will be under less stress. if you had a 300bhp cvh, and a 300bhp zetec, i'd say the zetec would be working less if it's capable of much more.
The Zetec is under MORE stress what ever you think!
Just because the Zetec can produce more power after mechanical changes doesn't make it any "stronger" (as in physical strength) than a CVH. It's pretty well known that both the CVH and the Zetec rods for example are a weak point around the same power level as each other.
The uncharted territory is wether or not the CVH can out last a Zetec at 400bhp but for equivelent power levels at equivelnt RPM levels, a standard geometry CVH will be less stressed than a standard geometry Zetec. As well as suffering from less piston and bore wear than the Zetec due to high speed changes in direction as well as increase thrust face wear on the Zetec. Due to these reasons, a CVH should actually last longer as a turbo application than an unaltered geometry Zetec.
It's not that the Zetec can't take it, it's just not as ideal as the CVH for a turbo application and can't rev as well as it could do. My diesel van revs better than a Zetec!
Glad you agree Tony!
