FRS->M4?

[wootwoot]

I had the pleasure of driving a brand new BMW M4 recently. It was a blast to say the least. The M4 is the highest performance vehicle I have ever driven (I know...), and it brought up a question in my mind: What would it take to make an FRS have M4 like perfomace? Assuming equal drivers, are we talking bolt ons like KW V3's, tires, pads, lines, supercharger, etc? Or are we talking custom valved coilovers, one off subframe, turbo kit, stand alone management, etc? I'm just curious what it would take to keep up with a M4 around the track....? I figured this was the best place to ask.

Cheers.

[EAGLE5]

Money.

[wootwoot]

Lol!

Figured that much.

[Mr.ac]

A corvette with FRS badges.

[jvincent]

As stated before, money. But lets break it down.

M4 = 3500lbs, 425 HP.

So, given the FRS weight advantage, you need to get it up to 400HP (crank). So go figure out whichever turbo/supercharger/built engine system will get you there and stay reasonably reliable as your first step.

Now because you are pushing a lot more power, you're going to want to upgrade the drive train.

At this point if you add some decent coilovers you should, from an equipment perspective, be able to handle the M4.

Since you are talking about track I'm assuming the brake pads and fluid are already done since any track car needs those.

[DarkSunrise]

Originally Posted by jvincent

As stated before, money. But lets break it down.

M4 = 3500lbs, 425 HP.

So, given the FRS weight advantage, you need to get it up to 400HP (crank). So go figure out whichever turbo/supercharger/built engine system will get you there and stay reasonably reliable as your first step.

Now because you are pushing a lot more power, you're going to want to upgrade the drive train.

At this point if you add some decent coilovers you should, from an equipment perspective, be able to handle the M4.

Since you are talking about track I'm assuming the brake pads and fluid are already done since any track car needs those.

I think there may be a cheaper route. If we're talking pure track car, I'd cut weight to ~2500 lbs., bolt on FI and aim for about 300 whp without touching the internals. Then add suspension, brakes, cooling, aero, etc. Basically replicate Fensport's 1120kg "Race" build:

2014 Tech Spec

Engine: Standard internals. Avo Billet turbo kit with custom 3" Blitz Nur Spec exhaust. Fensport Lightweight Pulley kit. Mapped by Fensport using Ecutek and Race Rom. Millers Nanotec 0w30 oil. Hel Oil cooler. Mishimoto radiator, Samco hoses.

Drivetrain:
Helix lightweight steel flywheel, Helix uprated clutch cover and 4 paddle cerrametalic clutch plate, M factory carbon propshaft, M factory 4.4 final drive and 1.5 way plate LSD. Standard Gearbox.

Chassis:
BC Racing external resevoir coilover kit. S Wave adjustable rear suspension arms and front roll centre adjuster. SuperPro polyurethane bushes all round. Summit 3 point strut brace and 4 point lower brace, rear anti roll bar braces.

Brakes:
Front: Stoptech 4 pot calipers and 328mm discs with Ferodo DS2500 pads
Rear: Stoptech grooved discs and Stoptech pads
Hel brake lines and Millers racing brake fluid.

Body:
Blitz Aerospeed wide arch kit with side skirts. Custom front and rear canards, custom rear diffuser. carbon rear spoiler and carbon mirrors. Seibon carbon bonnet and boot lid. Plastics 4 Performance perspex windows.
Track increased 110mm front and 120mm rear.

Wheels & Tyres
Rota Grid Drift 9.5 x 18 with Toyo R888 265/35/18 tyres.

Safety:
Custom Cages full FIA weld in cage. Corbeau Revolution seat. Luke 3" harness. Electric cut off, Racecar lithium battery, plumbed in extinguisher.

http://www.fensport.co.uk/FensportCars/GT86_Race.aspx

I think Fensport reliably competed on that spec for a full year before gunning for 500 BHP and building the engine.

[ZHoward]

i will change to c7 corvette z51 or m4 next year when i transfer, my friend did stock m4 in 2:04 in buttonwillow in socal, after change exhaust tires and brake pad someone did 1:57, pretty fast and good looking car, but that exhaust sound just awful, thats why i prefer c7 more

[RedBRZ80]

Just a good driver...

[wbradley]

Its probably cheaper to buy a mass produced package vs building a one off track weapon.

But there's no question the twins have the bones for it.

Engine, brakes, suspension, wheels, tires, drivetrain. Easy to double or tripple the initial cost of the car.

Its cool that so many people have done it.

[EAGLE5]

I was at the BMW dealer today. I like the sound of the M4. A salesperson was revving it as I walked by. The i3 i test drove is a solid car. Way too much regen on the accelerator pedal, though. I don't know what they were thinking.

Anyway, back to the M4. It's not a pretty car.

[wootwoot]

So... KWV3's.... Supercharged on corn juice with the rims, tries, and brakes to support it all?

[zdr93523]

For the same money, I would buy a lightly used 911.

[ZHoward]

Originally Posted by zdr93523

For the same money, I would buy a lightly used 911.

but old 911 is ugly, if u only have one car i mean..


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[zdr93523]

Originally Posted by ZHoward

but old 911 is ugly, if u only have one car i mean..


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You can get a 991S for the price of an M4, or a new 981S Cayman, both of which are a much better cars.