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S3-Leon said:
here some figures from MTM
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Normally, MTM cars produce above what they claim too...
Let's not forget that peak torque is directly proportional to boost...wind up the boost, torque goes up proportionally.
Not so with power...the turbo still struggles to move enough air at the top end of the rev range...so you can wind up the boost as much as you like...what the turbo's flat out, out's flat out...and you'll get precious little more top end power!
The con rods are the limiting factor on the 1.8Ts...much over 1.5bar peak and there have been instances of bent conrods...later cars apparently have smaller small ends than earlier cars...and hence the earlier engines are able to reliably produce more torque.
You can simply crank up the boost...but as we know, the temperature increases in a big way...temperatures of 70+ degrees after the crappy twin ICs are common....at this point i'd be more worreid about popping something, that anything else.
With the correct intercooling, ignition timing & fuelling there is no reason why boost of 1.8+ bar can't be used...how safely? Well, that's up to the owner.
I run 1.7 bar peak as a basic minimum everyday...and have been doing so for over 2 years...I have run as much as 1.89 without issue.
Would I run that everyday? Probably not. I don't want to be the one that finds out how much boost the conrods will take!! /ubbthreads/images/graemlins/tongue.gif