Apexi Power FC vs Syvecs S6

Mad

Well-Known Member
Both mapped by Fusion Ed at Surrey Rolling Road

Top Dyno
Apexi Power FC
GT3582R
Z32
1.8bar

Bottom Dyno
Syvecs S6
GT3582R
4bar map sensor
1.7bar


GTiR - 526bhp.jpg
553bhp.jpg
 

PobodY

Moderators
Staff member
Is it partly down to the resolution of the map? - The PFC curve looks a little more lumpy so I was wondering if that's because there are less adjustment points.
 

Rux

New Member
how can you compare with different days & conditions, different barometric pressures and fly power is just guesstimate after all
 

red reading

Active Member
The comparison is the smoothness it makes power...power wise with calibration factor of the things you mention there would be 5hpish either way.
 

PobodY

Moderators
Staff member
You can see that it was slightly cooler for the Syvecs run, but if anything the inlet temperature is higher than the ambient (whereas they were the same for the PFC run). - It's also worth considering that there's an inherent uncertainty in the measurement anyway, so if that was ±5% we'd be talking about ±25BHP between successive runs.
 

Rux

New Member
ambient air temp 16syv compared to 22 pfc
barometric pressure .5 different is a lot difference with result
one fitted with map sensor one with maf equates to no comparison with graphs
 

Fast Guy

Moderators
Staff member
how can you compare with different days & conditions, different barometric pressures and fly power is just guesstimate after all
I don't know if rolling roads do the same but in the RAF when we fitted a replacement (piston) engine we did a ground run and then using a set of graphs and the rpm corrected the power for ambient air pressure and temperature (supplied by the met office) so you can compare runs to each other in totally different conditions.
 
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