66Satellite said:
Ok, where's 351CJ hiding? He had some good thoughts on this a while back in another topic but I couldn't find them.
I wasted too much time on Sunday & Monday tracking down all the new Mustang info, so I've been catching up and have not had time to spend here.
You guys are going to have to come to grips with the fact that since the 3V engine has 40 more HP some of the tweaks that were easy to do with the old 2V engine are already incorporated in the 3V to get some of that 40 HP.
To look at some specific items:
1. 9.8:1 compression ratio - This is NOT an issue. The were able to raise the compression ratio and keep the it set up to run on 87 octane because the 3V engine has the spark plug located close to the center of the combustion chamber this gives more complete buringing of the A/F mixture so a higher compression ratio can be used. I also think the the central spark plug location reduced the tendency for the plug electrode itself to be the starting point of pre-ignition. Other factors in the ability to use a higher compression ratio are most likely the new PCM system that automatically adjusts the timing to the maximum allowable. So the bottom line is I don't think that the 9.8:1 CR itself will effect the ability to put a S/C on it, but the new PCM system could be a major stumbling block. Your run of the mill street corner Mustang tuner may not be able to do much tuning your 05 Mustang. You'll probably have to wait for Ford Racing, Roush, Saleen or someplace like that to come out with SC kits.
2. If the new PCM system automatically optimizes timing, the easiest performance boost may be to put 91 Octane in it. I'd guess 5 HP or so.
3. Exhaust - This will probably be the second easiest performance mod. X pipe up to 10 HP, Mufflers larger pipes maybe another 5 HP.
4. Pullies - Unknown until we really see what Ford has already put on the engine.
5. Throttle Body - Probably nothing. If the 3V has 57mm TB's like on the Bullitt, they 2 x 57s flow over 1.5 times the air as the single 65 mm. Twin smaller TB's should also give slightly better response so I'd guess new TB's would be a waste of money.
6. Inlet pipe / air filter / air box - From first view it looks like some improvements could be made, but since the inlet is so short gains would most likley be less than what's possible on the 99-04. I'd guess 2 - 5 HP max.
7. This one should be good news. Looking at the chassis photos, and based on the Mustang should be using the new PCM system, I'm guessing that the 2005 Mustang will be using the new T/C system that the LS & T-Bird uses. In this system the speedometer & odometer comes from one of the wheel sensors. So this means -
When you change the rear end gear the speedometer & odometer will still read correct! However if you change the tire diameter it will not read right unless someone is able to come up with a box that changes the pulse count.