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      12-24-2016, 12:34 PM   #6
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Quote:
Originally Posted by apexlocator View Post
Thanks for sharing your data with us.

So what is the minimum safe fuel pressure at redline? I assume you're saying 1600psi is too low for your current power levels? And when do we need to look at replacing stock injectors; not sure what the stock flow rates are. I know you guys are still in beta testing and appreciate the info.
You're welcome.

No, didn't say 1600 specifically was too low but when pressure dropped to about 1100-1200 the motor would misfire so 1500-1600 might be considered a limit where you can run it at this power level without any hiccups. This Stage 2 93 octane map is running really well and strong as you can imagine compared to stock with just downpipes on the car.

With meth there's quite a bit more on the table as its used as a bandaid for this fueling limitation. You could also run a bit leaner AFR in that area which will help.

With direct injection injectors on this motor there aren't any injector upgrades available You're thinking port fuel injection motors Wish it were that easy as many would opt to do that and upgrade in tank pump/pumps and run full E85 with big power. Instead, people throw meth on or add secondary port fuel injection with conventional injectors to help the OEM fuel system cope with power demands.

Just sharing some in-depth data on the fuel system on the S63tu seeing it struggle to keep up at this power level in midrange even on pump gas. If you threw in ethanol on top you'd max the fueling out even sooner.
Appreciate 2