MrMorden said:I would NOT mess with the factory rev-limiter!!! This is a new engine from Ford...nobody knows yet how strong the valve springs are, what the exact valve clearances are, etc.
M1Rifle said:Moving the rev limiter to 7krpm allows you to swing up and through 6300rpm and not worry about cutting out.
Most older cars don't have rev limiters. You don't absolutely need one, and 7krpm seems like a good "idiot limit". I would expect most poeple to NOT go let it sing at 6850 all day long.
MrMorden said:If your target is 6300rpm, why not set the limiter at 6500? That way you still have some cushion. My real point is that NOBODY KNOWS YET what the rpm limit is for these motors, and most of us don't want to be the guy that trashes his $5000 motor for the sake of a $250 tune.
M1Rifle said:Moving the rev limiter to 7krpm allows you to swing up and through 6300rpm and not worry about cutting out.
Most older cars don't have rev limiters. You don't absolutely need one, and 7krpm seems like a good "idiot limit". I would expect most poeple to NOT go let it sing at 6850 all day long.
GTP2GTO said:No worries about valve float? Do we know what the springs are like on thse motors?
Rootus said:I think that while this is impressive, what is critical to remember is that Ford can and will void your warranty if they find out about the re-flash. It is nice to see a good bump in performance from a re-tune, but lets face the facts -- Ford could have had the same performance improvement in their own tune if they had wanted to, but they need to allow for all kinds of situations. Putting an aftermarket tune generally takes away this buffer zone, and makes you much more vulnerable to situations that could cause damage to the motor. So go in with your eyes open, and make sure 25-35 rwhp is worth the risk to you (especially at this stage of the game, we don't have a history yet to determine how reliable these motors really are).
And for those who think that re-flashing the computer to the stock tune will somehow confuse Ford. Remember that at the very least you have to do it well in advance -- I have a 2003 Cobra, I can tell you from experience that when you re-flash through the OBD2 port, you set a code, and it takes a while to clear that code (and you cannot clear it with a scanner). Remember the guy with the 2005 that had the motor take a dump? Ford says that it happened at 900 RPM. Hmmmm.... they managed to record the event. What else do you think they might be able to record? That's the point -- be careful, because they can undoubtedly record much more than we know.
Dave
Rootus said:I think that while this is impressive, what is critical to remember is that Ford can and will void your warranty if they find out about the re-flash. It is nice to see a good bump in performance from a re-tune, but lets face the facts -- Ford could have had the same performance improvement in their own tune if they had wanted to, but they need to allow for all kinds of situations. Putting an aftermarket tune generally takes away this buffer zone, and makes you much more vulnerable to situations that could cause damage to the motor. So go in with your eyes open, and make sure 25-35 rwhp is worth the risk to you (especially at this stage of the game, we don't have a history yet to determine how reliable these motors really are).
Dave
You might want to do some research to see how often Ford has lost in that situation. I guess if you think you can afford the legal costs, go for it.max2000jp said:Ford cannot void your warranty persay, just for the flash. Read the Magnusson Act on Sema's webite. Ford has to prove that it was the programming that caused the malfunction.
Rootus said:You might want to do some research to see how often Ford has lost in that situation. I guess if you think you can afford the legal costs, go for it.
Dave
max2000jp said:Ford cannot void your warranty persay, just for the flash. Read the Magnusson Act on Sema's webite. Ford has to prove that it was the programming that caused the malfunction.
Ford cannot void your warranty persay, just for the flash. Read the Magnusson Act on Sema's webite. Ford has to prove that it was the programming that caused the malfunction.