So I went to get a run @ Croydon Racing Development. They use a Dyno Dynamics dyno. These are notorious for running lower than other dynos - Mainline runs higher and DynoJet (and other hub based dynos) even higher.
Ran in 6th gear. XForce cat back, HPS intake, ambient temp was 33 Celsius (fricken hot today!!!) also had the 19x10.5 275/35 wheels in the rear (heavier than stock I expect)
Now that you have all details - puts things into perspective - and my excuses 😂😂- my figures were ...
307.9hp atw. Tuner gave the above info (which I already know to be true)
I know it was running low but at the end of the day the main figure we are all after is the BEfORE and AFTER comparison.
No point in comparing different dynos with different settings etc. I will however provide a detailed write up with before and after using all the same parameters. New thread coming shortly 😊👍🏼