Focus RS
Going to post this again since most of you didn't see it because you where stroking e-*****.
I have some logs of the USDM Focus RS and what is happening is throttle closure, so my thoughts where correct.
It's not overboost not working, it's the other ECU fail safes coming into play. I think perhaps Ford made the first ROM rev a little too conservative for North American fuel.
Tuning will of course help, a new ROM rev from Ford is also probably inevitable.
Mitsubishi did the same thing with the Evo 10 when it first came out.
Here is a 4th gear pull showing throttle closure:
http://datazap.me/u/razorlab/fors?lo...lo=3-5-8-11-14
It's not overboost not working, it's the other ECU fail safes coming into play. I think perhaps Ford made the first ROM rev a little too conservative for North American fuel.
Tuning will of course help, a new ROM rev from Ford is also probably inevitable.
Mitsubishi did the same thing with the Evo 10 when it first came out.
Here is a 4th gear pull showing throttle closure:
http://datazap.me/u/razorlab/fors?lo...lo=3-5-8-11-14
The Fiesta ST HPFP maxes out at about 280whp on E8X. 280whp in a 2700lb car is still pretty awesome though.
On the stock turbo, I didn't make anymore power after a E45 blend so there was no reason to go higher. The stock Fiesta turbo is very small.
I'm excited to see what's nemsin's argument will be when this is explained and addressed.
"But the Evo didn't have these problems after 10+ years of tuners working out all the kinks! How dare a completely new car not be perfect and fully understood right away."
"But the Evo didn't have these problems after 10+ years of tuners working out all the kinks! How dare a completely new car not be perfect and fully understood right away."
Like I mentioned, the Evo 10 had a crappy first couple ROM revs that ran rich enough to have the car choke on it's own fuel. Mitsubishis newer ROM revs made a good amount more power.
EvoM Community Team Leader
Joined: Aug 2005
Posts: 5,690
Likes: 708
From: West Coast
Yup it's kind of a pain. The VW's have the same setup but have upgraded HPFPs available. The Ford HPFP is a bit more complicated and nobody has created an upgrade yet.
The Fiesta ST HPFP maxes out at about 280whp on E8X. 280whp in a 2700lb car is still pretty awesome though.
On the stock turbo, I didn't make anymore power after a E45 blend so there was no reason to go higher. The stock Fiesta turbo is very small.
The Fiesta ST HPFP maxes out at about 280whp on E8X. 280whp in a 2700lb car is still pretty awesome though.
On the stock turbo, I didn't make anymore power after a E45 blend so there was no reason to go higher. The stock Fiesta turbo is very small.
Whether its the overboost not working, or the ECU fail safes coming into play, the end result is the same (i.e., not 350hp). If Ford fixes this with an ecu reflash great, until then enjoy your 250whp RS.
Just get out of here and stop being such a *****. The adults are trying to have an actual multi viewpoint conversation.
its all about that p/w ratio. Im sure with the RS hitting the market and demand there will be options in the future. I suppose if your already blending the fuel yourself, you can start off with pretty decent gasoline vs the crap they probably throw into the typical E85 blend.
I've said this before but the MED ECU makes the mitsubishi ECU (even the 10) look like a Abacus.
EvoM Community Team Leader
Joined: Aug 2005
Posts: 5,690
Likes: 708
From: West Coast
I blend in the tank using simple math. With the correct tuning strategy, the Ford ECU is almost flex fuel capable so you don't have to be totally accurate in your blending. The ECU is very sophisticated and very fast to react to hit target AFR since it runs a wideband stock and Target-AFR fueling strategies and a crap ton of compensation tables that if you tune correctly, make the ECU VERY flexible. It also has a very sophisticated reactive ignition timing strategy with 20+ timing tables.
I've said this before but the MED ECU makes the mitsubishi ECU (even the 10) look like a Abacus.
I've said this before but the MED ECU makes the mitsubishi ECU (even the 10) look like a Abacus.
Well I concur the stock fluctuating power is frustrating, but it would not bother me in the least. There is no way in crap I would have a car like that and keep it stock. Does anybody in this thread have a stock car? No. This is the dumbest thing in the world to argue about. Once tuned, it will be really good!
I use a Cobb Accessport with Race Tuner. It was about a $650 investment.
Cobb must have a relationship with Ford because it's VERY well defined and some of the tables have names that nobody but the actual engineers at Ford would have named that way.
BTW, Cobb has an RS now so it's only a matter of time...
Here is a log from my Fiesta ST a long time ago, showing the reactive ignition and fueling strategy, if you are interested:
http://datazap.me/u/razorlab/fiesta-...12&zoom=92-204
Cobb must have a relationship with Ford because it's VERY well defined and some of the tables have names that nobody but the actual engineers at Ford would have named that way.
BTW, Cobb has an RS now so it's only a matter of time...
Here is a log from my Fiesta ST a long time ago, showing the reactive ignition and fueling strategy, if you are interested:
http://datazap.me/u/razorlab/fiesta-...12&zoom=92-204
Well I concur the stock fluctuating power is frustrating, but it would not bother me in the least. There is no way in crap I would have a car like that and keep it stock. Does anybody in this thread have a stock car? No. This is the dumbest thing in the world to argue about. Once tuned, it will be really good!