I am wondering how many of you guys have used your hand helds to up your redline and to what rpm is it now set? Further, have you noticed any added peak HP at the higher levels, above 6200rpm in both NA and SC versions?
I think most all dyno curves have the HP dropping after 6200rpm even in cases of upped rev limiters. So, is it worth it?
The higher rpm dynamic forces on the engine will shorten life of stock internals, is it worth it to rev up for little or no payoff?
Any guys who have done this and can chime in would be great.
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C&L CAI with MAF, Steeda UP's, FR 4.10's, Predator "C&L-MAF" Tune, Borla 3" tip catbacks, Kooks LT/ Catted X-pipe, Nitto 255/45/18(F) 285/40/18(R), Steeda Springs, Tri-Ax, Adj Pan Hard, Camber plates, Cowel Hood, Tokico Adj Dampers.
dyno; 315 RWHP/ 320 RWTQ
I havn't done it yet.. hell I dont even have my car yet lol, but I am going to take a guess at saying it's not worth it. Not only do the engines probably not make a lot of power, but I am going to say that it will damage your internals. I'm speaking from my experience with SBC's and small block dodge's. So, in reality: anyone who even has a Mustang's opinion is more valid than mine lol, I just dont think these engines were built for that.
A couple hundred RPM really doesn't make a difference. I mean, the fuel cutoff doesn't happen until 6400 RPM stock I think, and most tuners only bump that to 6800 RPM. That's not enough to be causing real issues.
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Black 2006 Mustang GT Premium Coupe | Interior upgrade package | 18" 'Torque-Thrust' style wheels | Shaker 1000 | T3650 | Side airbags
I am wondering how many of you guys have used your hand helds to up your redline and to what rpm is it now set? Further, have you noticed any added peak HP at the higher levels, above 6200rpm in both NA and SC versions?
I think most all dyno curves have the HP dropping after 6200rpm even in cases of upped rev limiters. So, is it worth it?
The higher rpm dynamic forces on the engine will shorten life of stock internals, is it worth it to rev up for little or no payoff?
Any guys who have done this and can chime in would be great.
The optimum shift point is always the point at which acceleration in the current gear is less than it would be at the same mph in the next gear. Given the fact that the horsepower curve on all normally aspirated, stock cam/head Mustangs seems to level off past 5000, the rate of acceleration would do likewise. The problem with revving beyond the optimal point, aside from the obvious unecessary wear, is missing the early part of the torque curve where the strong acceleration begins. I think this is what would happen if you shifted beyond ~6200.
I didnt do the CAI/tune yet. But my feelings now are that she likes to pull pretty well right to 6200. I would like the increase simply so I can shift at 62-6300 without tapping the fuel cutoff. It bumped it a couple times while starting to throw my shift.
As long as there is a rev limiter somewhere where it still is effefctive against engine damage, I am happy.
4.6 Motor tuner RPM increase 
