My Evo 6 RS (CP9A SNDFL 033) weights 1260 kg (2770 lbs) or slightly below (rear seats removed, carbon hood…). I want to get a minimum of 2.5 kg/hp. So I aim for 550 @ the wheels.
Today, I stand/move @ 355 hp (272s, porting, HRA Turbo, exhaust, mapping…), which is barely 3.5 kg.
Here goes the cost calculation results (find the ingredients at the end, based on EWG light (not too much different from the other scenarios)), not pretty (1€ = 0.84505 USD = 1.10748 GBP):

1.1 The less expensive (more mass) route: IWG, T4Div., heavy rotating assy. … = 26.373 € (97 %)

2.1 Same as above but EWG, single scroll = 25.310 € (93 %)

1.2 The more expensive (less mass) route IWG = 27.175 € (100 %)

2.2 More expensive EWG = 26.113 € (96 %)

The above does not consider the drivetrain: Dog Gears = 4.500 or Sequential (6sp) = 10.000 €. So add it since it’s required.

Overall average is somewhere 34.000 €

355 hp (3.5 kg) = 0 €
550 hp (2.4 kg) = 34.000 €
1 hp = 174 €

Considering profit from sales of my then obsolete parts: 2.750 €, so corrected:

1 hp = 160 € (BTW, if you need only 30 hp gain starting from 355 that is almost 5 grand)

Annotations:

a) Using only proven and available aftermarket parts for tuning, exception is the cnc head porting

b) Using only new items for the build (risk reduction)

c) Total shipping costs are approx. 1.500 € itself

d) Not including “my” labor (assy.)

e) All hp gains are @ the wheels, not the crank

f) Torque is est. to be @ 700 Nm (516 lb-ft)

g) Spool has priority

h) Oil is wet sump

i) H2O cooling not considered

j) 105 octane – yes I have that avail. at the gas station. True E85 not

Conclusion: What most of us already know seems proven – no fun on empty pockets. Turning our evos into something seriously fun requires deep pockets. If you want that kind of performance and you throw in all costs you end up spending around 60 grand. Is it worth it? I do believe yes – if you can afford it. For my part, I found out I cannot! Puh. Or maybe by reducing weight to 870 kg (1920 lbs) just by means of ridding/ripping of parts…

The list below shows the final prices (scenario 2.2 (+4/-7%) including gearbox) once at my door.
Some items have no costs, these I already have.

Have you achieved 550 @ the wheels? If so, how did you get there, what parts have you changed/modified and at what costs?

Cheers
Kris

 

Hmmmmm .....PhD in Evo, I'm about a 3.42 kg guy which is enough for me at the moment. Keep us updated on your build journey

 

Gotta pay to play You should probably budget more for the injectors and get a good High-Z set. I might have missed it but I didn't see much in the way of fuel system upgrades in your plan. If your going to do any launching at that power level you will probably want to upgrade the front diff as well. Speaking of putting the power down your probably going to want to get some bigger wheels and more rubber to help with that. Then there is stopping all that power...... lol its a bottomless pit you can just keep shoveling money into. Which comes back to your stated goal, any context behind that or is it just some arbitrary number you came up with?

I would argue with you that an evo can be seriously fun in stock form, its all about your perspective I guess. You might just wanna sell the evo and build something like an Ultima RS for the dollar to hp/kilo ratio.

 

I like west coast, Spent 3 yrs. in escondido, ocs and encinitas - long time ago, good times...
Fuel delivery is a good point. Inj. will/would be bosch motorsport ev14 2000 cc sourced locally. today I run ev14 800 deatsch with a DW 300(?) fuel pump, already hi-z. You got a point there in terms of delivery, not so much a cost reducer though. I'm now thinking DW feeder pump --> filter --> swirl pot --> Bosch 044 delivery pump --> regulator etc.. Will add that to the shopping cart... grrr.
Drivetrain is supposed to be robust enough, but thanks for the hint, I will look into that. Brakes are stoptech trophy 4 pot and oem rear. Overall gearing will be Vmax 220+ km/h (140) @ 7.2, so I'm not concerned on stopping - more on shifting. Traction will be addressed once I totally loose it Quater mile ain't my thing, more curves...
I have my evo since 2008 and sort of a deep relationship = done almost complete inside out... I'm evo.
Cheers

2.5 is quite the number in terms of staying on the durability/reliability side of what you can get out of 2.3 liters w/o loosing to permanent maintenance. Call it the "break even"...