As to not completely hijack the other thread, I've decided to create my own. It asks a similar question about stock frame turbos.

Most of my questions come from a prospective build towards a points-based classing system with hp and weight restrictions.

Suffice it to say that, with my current points, my hp cap is 332 whp and my weight cap is 3413 lbs. The mechanics of the classing system work in a way that as you incur more points, your minimum competition weight to stay at a certain class has to increase. You get a bit more power to compensate, but you don't want your car getting too heavy. I'm quite happy at this current intersection of 332 whp and 3413 lbs.

The objective therefore is to build a cheater power curve. As you're limited by power, it doesn't matter when and where you make this power, just that you don't exceed it. Therefore, I'm looking for a turbo that will hit 332 whp as early as possible, and then using some boost controller trickery and correct wastegate spring selection, hold that power level by lowering boost from the usual max power tunes.

I'll also include a couple of common mods from my groups' point classification system and their point values:

10 Trimming of OE turbo wheels or replacing wheels in stock turbo housing. 2.0
11 Change of OE turbochargers such that the compressor inducer diameter and/or turbine exducer diameter is not larger than 105% of OE, excludes exhaust manifold under 5.0B.2 2.0
12 Change of OE turbochargers such that the compressor inducer diameter and/or turbine exducer diameter is not larger than 122% of OE, excludes exhaust manifold under 5.0B.2 5.0
13 Change of OE turbochargers such that the compressor inducer diameter and/or turbine exducer diameter is not larger than 132% of OE, excludes exhaust manifold under 5.0B.2 7.0
14 Change of OE turbochargers such that the compressor inducer diameter and/or turbine exducer diameter is equal to or greater than 132% of OE, excludes exhaust manifold under 5.0B.2 9.0
1 Modification of the camshaft(s), including valve springs, valve retainers and the valve-timing controller (e.g. cam gear(s) or VTEC controller). 3.0

Stock frame turbos should fit the description of item 10. However, for my purposes, stock location turbo is no different than full custom setup, so I'm pretty much set between stock turbo or stock frame turbo. For example, an MHI 18K or FP Red would only be worth 2 points, but something like a stock location GTX3071R is 5 points and a stock location GTX3076R or GTX3576R is 7 points. What I'm not quite sure of is how much different cams will affect spool. But looking at the point values, a stock frame turbo or any turbo that is 49mm comp inducer / 51mm turbine exducer + cams is equal to any turbo that is 57mm comp inducer / 59mm turbine exducer. Which is better? That's what I'm hoping you guys can help me with. The naive Evo modder in me is thinking FP Red + GSC S2 Cams, but I really have no idea what that will do to the power curve. I've read that the FP Red is laggy, so possibly the MHI 18K?

razorlab was kind enough to link a dyno that shows what I'm looking for, a nice flat power curve, affectionately named "the cheater power curve". The shape is what I want to illustrate, rather than the numbers:


At my current points level and environment factors, I'm limited to:
stock block (internals, displacement, compression)
pump 93

Everything else, power-wise, is unrestricted. Filters, Manifolds, Exhaust, Throttle Bodies, etc. Let's say a Dodson Sportsman will be installed, so the block limit of 400 lb-ft of wheel torque will be used. At that torque max, the most I can hope to accomplish is 332 whp from 4372 - 7500 rpm, unless there is a way to wind the stock motor past 7500 rpm constantly in a race situation? Also, if the number 400 lb-ft is too high for constant track use, what is a better torque number to shoot for?

So I ask you knowledgeable people, what is the best turbo and cam setup to achieve what I'm looking for? Car is a 2011 MR. MR and pump make this a bit tougher of a problem.

The second priority is to have a fun car. While this will be a TA car with a roll bar, it will still be street driven. When not in competition, the ECU will be flashed with a normal tune with the more common shaped power curves. On the street, I'd still like to stretch its legs, so the more power the better. I realize these seem to be competing priorities since more power usually results in later spool, so consider the cheater power curve as the first priority.

What would be most helpful to me would be: (Best guesses are encouraged, as no one would have strict dyno readouts for these questions)
1. Cams you would pick for this application
2. Top 3 turbos you would pick
3. For each turbo:
a. at what RPM, when tuned normally, would you expect the car to first hit ~332 whp
b. at what RPM, when tuned normally, would you expect the car to last make ~332 whp (i.e. after the power peak, as the power falls)
c. what would be the peak hp, when tuned normally, of this particular turbo setup


I thank you for your time.