I currently run ~10psi on a VMP GenII Stage 2 kit on my 2011 GT. Everything else engine wise and transmission wise are stock.
My understanding is that *in general* the stock internals can withstand up to 650 RWHP. This comes from a lot of reading on Mustang forums.
Goals are 700-800 RWHP. I imagine a one piece driveshaft, torque converter, return fuel system upgrade, larger injectors would be required.
What I am not clear on is compression and boost. I have it in my mind that I can "simply" go to MMR and buy a forged short block, Manely pistons and rods with the same compression ratio that the stock Mustang has and throw my VMP kit back on top of it with a smaller pulley (with stock heads).
What does the lower compression buy me? I am not versed on compression at all, so why not just go as low or high as possible for a daily driven supercharged Mustang that will be run at the strip?
Arizona has e54 and from the local guys, there does not seem to be too much of a power loss.
The local shop that installed my supercharger also builds engines. I may give them a shout.
There is a single E85 station about 25 minutes from me in the state. They've been there literally 20+ years (the station) and the place is a landmark so they aren't going anywhere. I am really considering running 11:1 and boost with E85 on my 4V that may or may not ever get built.
Sounds lethal, if you go that route, I must agree to stay away from Mmr. Get an aluminator long block or find a local tuner who actually enjoys building long blocks.
Compession much like boost generates heat. The higher the compression the higher octane fuel you'll need to not get detonation. Alcohol has a much higher resistance to detonation but, you'll have to burn 4 times as much and your mpg will tank. If you care about that. For me its smiles per gallon.
Just heat or will there be a noticeable difference with how the car drives? I looked at Livernois and the street series as a 10:1 ratio. The stock 5.0 is 11:1.
What, if any, differences will I notice with things like throttle response during daily driving or boost?
I'm not a pro but, I have a static compression with my old 4V, while your newer 5.0 has the cam phasers which will allow you to run more boost. There is a point where pump gas will detonate if you have more boost then you can safely cool. Having a lower compression ration will make a little lag but will allow a ton more boost and initial timing. This is great at the strip, but not so much as a daily only. I would talk with a local tuner as to weather you should stay 11:1 or go for more boost/timing with lower compression.
Or you could just run E85 and be a beast, just don't run out without an E85 station in the area.
I'll have to continue to do some research.
I don't think I will every want more than 800 RWHP on this car. Perhaps forged rods and pistons will be enough.
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Related Threads
?
?
?
?
?
Mustang Evolution Forum
2.1M posts
50.8K members
Since 2003
A forum community dedicated to Ford Mustang owners and enthusiasts. Come join the discussion about performance, horsepower, modifications, troubleshooting, racing, and more!