Motion Lab Tuned 2010 370z 611WHP/517WTQ @ 10.5psi PTE6266 Q16 Stock block record?

Motion Lab

Great questions! The fuel system upgrades weren't really dramatic as it was still a returnless style system with a single DW300 (320LPH) fuel pump. The fuel pump was at its limit, but we also ran out of headroom with the MAF sensors too so this was truly maxed out for the way the car is currently set-up.

We prefer the race fuel due to consistency. Also availability. E85 in our area really has dwindled down to almost nothing. The closest pump to the shop is around 30minutes away. Also getting back to the consistency aspect, to be sold at the pump the fuel must only contain up to 55% ethanol. E85 always gets worse in the winter time and when tuning for real power like 600+WHP on a stock motor, octane inconsistency can make for a quick catastrophic failure. Q16 will make more power than pump e85 in our experience. C85 would be a fantastic fuel to make power as well as it is pretty much e85 on crack.

Due to the returnless style system you end up maxing out your fuel system very easily even with large pump and injectors, as fuel pressure is actually dropping with each PSI of boost versus rising as it would on a traditional factory turbocharged car. Having said that though you really cant expect much more than 600WHP from a single 320LPH fuel pump.

Hope that answered your question somewhat.

Thanks,
Alex Goodwin
AlexG@motionlabtuning.com

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