Does the factory "tune" regulate how high it'll let you rev it while standing on the brake? Like say it has a 3k rpm stall, would the tune let it rev to 3k?
I'm not sure if that's the case on the new Mustangs, but on 2010 and older cars, that's not true.
Ok so do u think that this engine can handle upwards of 350-400 stock? Also the engine installer said it wasn't the engine put in in 99 for the car but a updated version of the 4.6l, was the 99 model the PI version that I have been hearing about or does the installer not know what he means. Also I've been looking at coil overs and they range from 600-2k any good brands anyone has used and had a great experience with/ minimal to no problems. I think I might just wait on engine upgrades and get the suspension and all my cosmetic work done on the car wheels, coil overs, etc and then maybe a year or two save up for a vortech, or pro charger. I've heard that turbos are a offer pain in the butt to install correctly. So I thought I would head down the supercharger route. Or would u guys just recommend saving my money and getting a 04 terminator? For like 15-20k?
With a good tune the engine should be able to take 400whp. You can do an E85 conversion for added wiggle room with ignition timing and increased inlet air temps from the blower.
I'm not sure what you mean by updated version but if the Jasper engine was an exact replacement engine for a 99 GT, it should be the PI engine. You can verify this by looking at the intake ports on the cylinder head. PI ports are rectangular and NPI are circular.
As for coilovers, Ground Control coilover sleeves can be had for less than $500, and then you'll need to get adjustable shocks of your choice, which is another $600-700. Then there is the BC Racing kit which comes with everything you need for $1050.
If switching to a Terminator is an option, I would go that route instead. Much better performance potential from those cars if you're into modding/racing. And they will hold value much better than a GT.