Repro Ecoboost

[ypena02]

Sure, but seems really odd a deviation of more than 50hp, I woud expect to lose no more than 20 or 30hp in the worst of cases. 50hp is almost a 20% of the overall power, but ayway I understand this may be deemed as "normal".

What octane fuel are you using?

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[cpelo]

98 octane gasoline in Spain

 

[garbancillo]

What octane fuel are you using?

98 octane gasoline in Spain

Carlos, our 98 RON octane fits with 91 PON in the US

 

[cpelo]

I leave the graph of the first launched the car in stock and launched with the reprogramming of a tuner with map cast for them, as it did not taste much the results of the second launched , one of the reasons was the room temperature to that day in Madrid , next week take the car to another dyno to compare results.

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[Juben]

So this is what Cobb claims for stock, stage1 (no hardware change I think), and stage 2 (intercooler change, intake change, more boost). Most important is horsepower and torque change instead of actual number. This is basically 98RON fuel.

265-->335hp with no hardware change seems like very big change.

What's interesting to me is that they seemed to have worked some kind of sorcery (kidding) to get the horsepower to continue to redline at a pretty linear rate without much decline, if any. The stock head is crap on these cars and you normally don't see one hold power out, even with a big turbo, after 5,500 rpms due to that factor. The Stage 2 graph actually looks pretty darn good.

 

[arghx7]

DI heads (in general) are designed for tumble flow, not cylinder filling.

The stage 2 has less backpressure so the engine doesn't have to work so hard pumping exhaust out of the cylinder. Less backpressure means less residual gas. Less residual gas also reduces tendency to knock. Less intake restriction reduces compressor wheel speed & pressure ratio to make the turbo work more efficiently.

 

[cpelo]

Hello, then the graph of the repro of my car which data are 330 hp 536 nm, you look good? which opinion do you have? a greeting

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