I'm planning on modding my car to get close to or slightly over 400 hp...I think I can do it for about $3500 ish, and still keep it N/A.
The huge benefit to me about staying naturally aspirated. is that I can swap tunes from a 93 octane performance tune down to an 87 octane with restricted performance to allow a novice driver like my two young boys (and I know in 6+ years they will be begging to take it out for a spin).
Presently, I have plenty of cosmetic mods and slight upgrade to the brakes. The only minor performance mods that I have done are:
1) Upgraded the Ford Stock air intake elbow to the Steeda CAI Intake Elbow.
2) SCT-X3 / Steeda 93 Octane Tune
In one of my prior topics, I expressed my disappointment that these upgrades didn't really net much improvement in the "seat of the pants" dyno as I had hoped for. The nice folks at Steeda suggested that these mods probably added 8 to 10 hp to the car, but that is really hard to determine. So, my quest for more power without breaking the bank continues.
One of the FRPP Suppliers has a 375 hp mod kit that adds the 62mm throttle body, Hot Rod cams, and the Performance Intake Manifold, and I was looking to add a set of Shorty headers with a full custom tune to get right at the 400hp mark. Here is the install progression I was considering to spread the costs over a couple of paychecks.
1) Add the FRPP 62mm throttle body and use an updated canned tune from Steeda for now.
2) Add JBL equal length runner Shorty headers and install 1/2 inch lower performance motor mounts (again update the canned tune with Steeda for now.
3) Add FRPP Performance Intake Manifold and FRPP Hot Rod Cams. Adding a full custom tune at this point by the installer.
The lower motor mounts are to allow the FRPP Strut tower brace to clear the new FRPP intake manifold...still want to keep this on the convertible for extra bracing. I think all the parts will run me about $2200 and the labor will be around $1300 to $1500. I'm also looking at swapping the stock 3.55 gears for the 3.73 FRPP gears at some point in the process.
I called the FRPP Tech-line to get their confirmation that these items will get my SGT to that level, and they confirmed that it is a solid claim and not all hype. The only other option that is a potential add-on would be the CNC Stage-1 heads, but that is and additional $2,000 in parts alone and really only adds more power in the higher RPM range (above 6k) and I typically don't push the motor there knowing that we don't have forged internals. The CNC heads would push up to 425 - 440 hp for an additional $2,500+ in funds....that starts to approach the basic S/C costs as well.
I also confirmed this would all fit using the lowering motor mounts with installer who I will look to do this work - he is sure it will and that this combo will get me to right at 395 to 400 hp at the flywheel and let me keep the strut tower brace. Both the FRPP Tech-line and the installer said it will be a very substantial improvement in performance while also remaining a very controllable car. I should be putting down about 350+/- hp at the wheels. My goal is to get a good bit of usable power across the entire RPM range
Any thoughts? Am I missing anything here that I should be considering?? Anything I should change??
I'm going to start with Step 1 (62 mm TB) in the next couple of days so I can maybe install it this weekend.
I was initially looking at the FRPP shorty headers, but my installer told me that there is only a slight difference between the FRPPs and the stock exhaust manifolds...that is when the JBAs came into the picture - he claimed they were more of a cross between a Shorty design and a Long Tube design with the Shorty expenses and fit.
Any suggestions or comments would be greatly appreciated...$3500 to $4000 is a ton of money for me to spend on my car, and I don't want to make a mod upgrade that I will regret later.
Edited by AndyGJ, 12 November 2012 - 02:36 AM.