I have a Roush M90 on my Mustang. I am an intern at Ford, and have worked with multiple aftermarket shops that specialize in Mustang mods. Anything really past 450 rwhp can be dangerous to the engine and can cause quicker failure or problems on down the road. The stock block can not take much more before the replacing of engine components becomes necessary. That being models 4.6L GT S197 05-09 Manufacture Ford, it is recommended as a safe measure to stay around that rwhp or less (number from a Mustang Dyno which may yield a lower number outcome than standard i.e. DynoJet). By all means do more and you can be safe, especially if you drive the car nice like a Grandma, but I get 11 mpg because I love to drive my Mustang hard, and I have a lead foot.

 

Your post still makes no sense, you seem to imply that replacing the heads and cams will give you a stronger bottom end, simply not so. I'm not an intern, but I do have an m90, with cams, pulley, long tubes and flowed heads and VMP tune, by the looks of your sig. you make 418 hp on 93octane fuel, dude your about 90hp short, you need a better tune.

 

That is why I said etc. I'm not here to fight. Im a 17 year old High school intern at Ford. Other than a hobby of owning and working with cars im not a specialist. Simply skip over what I say if you don't want to use it or find it of any value. It is simply words. My car was 390 rwhp on a Mustang Dyno before tune. I'm not going to gain 118 rwhp from a tune as you say I should.

 

You've got a lot to learn. Simon and I have experience where you have conjecture. You'll get there one day, but you've gotta learn to walk before you can run.

 

Yeah, I admit I don't know a whole lot. That may be a reason I'm here, but I'd like to think I know enough for being 17. No need to deride me on a forum...

 

Don't take it seriously. Text and tone are relative. Any time bad information pops up, someone's going to pounce on it. You don't need terribly thick skin to brush off a post on a forum.

 

Oh, I am aware. As much as people deny it, almost all forums are alike in that regard. I have yet to find a forum of any kind where banter or arguments don't take place. It's natural when people don't agree.

 

Anyhow, congrats on the boost I'm sure your gonna enjoy. AF gauge is a must IMO. Just so you know I'm at 470RWP with almost 20k on my Whipple blower. I went thru my stock clutch pretty quickand now run the Spec3+ setup which is nice but its an On/off type of clutch with no slip.

I would recommend you oder an extra set of plugs just to have on the side along with a belt. If you need help with install there are plenty of guys like Simon, Diabolical, or myself which will offer you sound and knowledge advice.

 

Trust me, I can't wait. I was thinking about replacing the entire transmission for a 6 speed later on as well, but just waiting to see how it goes once the Whipple is in. What plugs do you recommend?

 

Here is a news flash. I don't care what kind of intern at Ford you are, even the master mechanics that have years of experience with wrenching on cars are blubbering idiots when it comes to putting FI on cars. They look at a car with a blower and freak out. They pull codes off the PCM and because you get a P0340 or an oxygen sensor code, they leap to replacing parts. There is a reason every decently large dealership has a private tuner they call in to diagnose and tune out problems with cars. They do not train their people on tuning. They should. Even the SVT dealers farm out their work, including Rousch dealers.

Search the forum, step back and learn something. I am one of the unlucky ones here that has learned my stuff by trial and error, along with figuring it out on my own. As an intern you will think you know stuff, until you start to do it. I have an ASE certified mechanic at Ford that is on pseed dial. He is aa wealth of knowledge. He used to own a shop with a dyno and thought he could tune cars. He can't.

I'm sorry to stray off topic, but posts like you made at the begginging of this thread are not helpful and only serve to make people think they need to do more to their car to get it ready for an SC. I agree 450 rwhp is a good limit for most rotating assemblies (not block, like you said earlier. The blocks on these cars are good to 1000hp) on our cars. But I have seen many live well past that for a long time with no issues.