Cupra 300 - 2500RPM Torque Drop - Dyno Run Graph

[NotSoSimple]

Try V-Power first my old Cupra 280 felt fine on Momentum but when logged it wasn't.

Yeah im running on VPower now so lets see

 

[NotSoSimple]

Maybe get it on a diagnostic machine or if you have VCDS/OBDEleven you can check for misfires. It saves you spending £150+ for something that could be nothing.

I did buy new sparks as mine where 20000 miles old. I put the VAG OEM 'RS7' plugs in which are made by NGK.

 

[Paul Bunce]

This could be an issue of fuelling, a lot of American owners (mainly in Golf R's) have a similar issue where the timing is retarded / wont advance on heavy acceleration due to knock caused by poor or low octane fuel. This can bee seen by a dip on the dyno graph.

This is also what happens if you run 95 octane fuel in these engines, they work fine but you'll loose power as the engine ignition timings become limited.

 

[queen]

How do i check the wastegate?

You could try vcds and log requested vs actual boost pressure. A mechanic can check the wastegate and dv with pressure/vacuum.

 

[paddy6789]

I did buy new sparks as mine where 20000 miles old. I put the VAG OEM 'RS7' plugs in which are made by NGK.

Yeah I have those too. Nice little upgrade


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[AndrewJB]

This could be an issue of fuelling, a lot of American owners (mainly in Golf R's) have a similar issue where the timing is retarded / wont advance on heavy acceleration due to knock caused by poor or low octane fuel. This can bee seen by a dip on the dyno graph.

This is also what happens if you run 95 octane fuel in these engines, they work fine but you'll loose power as the engine ignition timings become limited.

That was what was happening with mine running APR Stage 2 high torque using Momentum 99.