List of FM4 cars that can be detuned

Forza Motorsport Legacy Motorsport FM4 Discussion
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Copied over from the old forums, The DeTune Project (part deux) originally started by Coujo:
http://legacy.forums.forza.net/forums/thread/4901604.aspx

As he stated, the point of this list is to identify cars that can drop below their stock class. This can extend your options for race events restricted to a class, allowing you to drive cars you enjoy or to help increase Affinity. For the most part I believe that de-tuned cars don’t necessarily make for competitive models in their lower classes, but some might. Feel free to discuss tips in this thread. I’ll correct my list if anyone sees something impossible or missing.

De-tuning is generally accomplished by adding weight (rims, cage, diff), race aero, drivetrain conversion, drag tires, sometimes a transmission, or the aspiration swap: convert aspiration to another option (usually turbo), buy the Race twin turbos and then sell them, then go buy one of the upgraded intercoolers. This effectively adds weight from the intercooler without any power benefit.

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Cars by class. The first class is their stock class, the second is the lowest they can go:

R1 to R2
2010 Chevrolet #89 Intersport Racing Oreca FLM09
1987 Porsche #17 Racing Porsche AG 962c (May Porsche Pack)
2011 Suzuki #1 Monster Sport SX4 Hill Climb Special (Dec IGN Pack)

R2 to R3
2006 Aston Martin #007 Aston Martin Racing DBR9
2008 Aston Martin #009 Aston Martin Racing DBR9
2011 Audi #02 Audi A4 Touring Car
2011 Audi #03 Audi A4 Touring Car
2011 Audi #04 Audi A4 Touring Car
2011 Audi #05 Audi A4 Touring Car
2011 Audi #06 Audi A4 Touring Car
2004 Audi #8 Audi ABT TT-R
2004 Chevrolet #3 Corvette Racing C5.R
2006 Chevrolet #4 Corvette Racing C6.R
2003 Dodge #126 Team Zakspeed Viper GTS-R
2000 Dodge #91 Viper Team Oreca GTS-R
2005 Maserati #15 JMB Racing MC12
2008 Mercedes Mercedes-AMG #4 C-Class Touring Car
2003 Opel #5 OPC TEAM PHOENIX Astra V8
2003 Pagani #17 Carsport America Zonda GR
2003 Saleen #2 Konrad Motorsport S7R

R3 to S
2009 Audi R8 LMS
2010 BMW Z4 GT3
2011 Chevrolet #04 Chevrolet Racing Monte Carlo SS Stock Car
2008 Dodge #11 Primetime Racing Group Viper CC
2008 Dodge #2 Mopar Viper Competition Coupe
2003 Dodge Viper Competition Coupe
2011 Ferrari 458 Challenge (May VIP Pack)
2011 Ford #05 Ford Racing Fusion Stock Car
2011 Ford #17 *** Johnson Racing Team FG Falcon
2011 Ford #19 Mother Energy Racing Team FG Falcon
2011 Ford #4 IRWIN Racing FG Falcon
2011 Ford #5 Ford Performance Racing FG Falcon
2011 Ford #9 SP Tools Racing FG Falcon
2011 Holden #1 Toll Holden Racing Team Commodore VE
2011 Holden #11 Pepsi Max Crew Commodore VE
2011 Holden #33 Fujitsu Facing GRM Commodore VE
2011 Holden #8 Team BOC Commodore VE
2011 Holden #88 TeamVodafone Commodore VE
2006 Koenigsegg CCX
2012 Lamborghini Aventador LP700-4 (Nov Speed Pack)
2011 Lamborghini Gallardo LP570-4 Superleggera (May VIP Pack)
2010 Lamborghini Murcielago LP670-4 SV
2011 Lamborghini Sesto Elemento
1997 McLaren F1 GT
2011 Mercedes #35 Black Falcon SLS AMG GT3 (Apr Alpinestars Pack)
2006 Mitsubishi HKS Time Attack Evolution (Unicorn)
2005 Porsche #66 AXA Racing 911 GT3 Cup (996) (May Porsche Pack)
2008 Porsche #2 Gruppe Orange Racing 911 GT3 Cup (May Porsche Pack)
2011 Porsche #23 Alex Job Racing 911 GT3 Cup (May Porsche Pack)
2011 Porsche #54 Black Swan Racing 911 GT3 Cup (May Porsche Pack)
2003 Nissan #3 Hasemisport Endless Z
2005 Nissan #46 Dream Cube’s ADVAN Z
2004 Saleen S7
2003 Subaru #77 Cusco Subaru Advan Impreza

S to A
2009 Chevrolet Corvette ZR1
2011 Ferrari FF
1985 Ford RS200 Evolution
2005 Lamborghini Gallardo
2005 Lamborghini Murcielago
1987 Porsche 959 (May Porsche Pack)
2010 Saleen S5S Raptor

A to B
1968 Alfa Romeo 33 Stradale (Sep Pennzoil Pack)
2001 Aston Martin V12 Vanquish
2010 Audi S4
2007 Audi S5
2010 Audi TT RS Coupe
2004 Bentley Continental GT
2008 BMW M3 E92
2008 BMW M3 E92 Design Challenge (BMW Art Pack)
2011 BMW X5 M
1994 Ferrari F355 Berlinetta
2009 Holden HSV w427
2010 Jaguar XFR
2009 Jaguar XKR-S
2012 Jaguar XKR-S (Apr Alpinestars Pack)
2006 Lotus Exige Cup 240
2010 Mercedes C63 AMG
2010 Mercedes SLK 55 AMG
2012 Mercedes SLK 55 AMG (Jul car pack)
2010 Nissan 370Z
2002 Nissan Skyline GT-R V-Spec II (R34)
2005 Panoz Esperante GTLM
2010 Porsche Boxster S (May Porsche Pack)
1965 Shelby Cobra 427 S/C
1965 Shelby Cobra Daytona Coupe
1999 Shelby Series 1
2006 Subaru Impreza S204 (Unicorn)
2011 Tesla Roadster Sport (Jan Launch Pack)

B to C
1995 Audi RS2 Avant
2011 BMW 1 Series M Coupe (Jan Launch Pack)
2005 Dodge SRT4 ACR
1996 Dodge Stealth R/T Turbo
1964 Ford Fairlane Thunderbolt (Oct AmMuscle Pack)
2009 Ford Focus RS
2007 Ford Shelby GT500 (Unicorn)
2010 Ford Taurus SHO
2010 Honda Mugen Civic Type-R 3D
2002 Honda Mugen Integra Type-R (Unicorn)
2003 Honda S2000
2013 Lexus GS350 F Sport (Aug Playseat Pack)
2005 Lotus Elise 111S
1997 Mazda RX-7 (FD)
2002 Mazda RX-7 Spirit-R Type A (Unicorn)
2009 Mercedes ML 63 AMG
2003 Nissan Fairlady Z
1982 Porsche 911 Turbo 3.3 (May Porsche Pack)
2010 Renault Megane RS 250
2005 Subaru Legacy B4 2.0 GT
1998 Toyota Supra RZ
2010 Vauxhall Insignia VXR
2005 Vauxhall Monaro VXR
2003 Volkswagen Golf R32
2004 Volvo S60 R
2011 Volvo S60 R-Design

B to D
1994 Nissan Fairlady Z Version S Twin Turbo

C to D
2001 Acura Integra Type-R
2010 Acura TSX V6
1960 Aston Martin DB4 GT Zagato (Sep Pennzoil Pack)
1971 AMC Javelin-AMX
1991 BMW M3 E30
1970 Chevrolet Corvette ZR-1 (C3)
1970 Dodge Challenger R/T
1992 Ford Escort RS Cosworth
2010 Ford Fusion Sport
1997 Honda Civic Type R
2004 Honda Civic Type-R
2006 Honda Civic Si Coupe
2007 Honda Civic Type-R
2012 Honda Civic Si Coupe (Jan Jalopnik Pack)
2000 Honda Integra Type-R
2002 Honda Integra Type-R
2004 Honda Mugen Civic Type-R (Unicorn)
2013 Hyundai Veloster Turbo (Jan Veloster Pack)
1992 Lancia Delta Integrale EVO
1990 Mazda Savanna RX-7 (FC)
1995 Mitsubishi Eclipse GSX
2006 Mitsubishi Eclipse GT
1984 Peugeot 205 T16 (Aug Playseat Pack)
2004 Peugeot 206 RC
2010 Renault Clio RS (Mar Pirelli Pack)
2007 Renault Clio RS 197
2006 Saturn ION Red Line
1994 Toyota Celica GT-Four ST205
2003 Toyota Celica SS-I
2002 Toyota Soarer 430SCV
2006 Vauxhall Astra VXR
2011 Volkswagen Polo GTI (Feb ALMS Pack)

C to E
1991 GMC Syclone
1992 GMC Typhoon (Nov Speed Pack)
1982 Lancia 037 Stradale
2006 Saturn ION Red Line

D to E
2010 Abarth 500 esseesse
2002 Acura RSX Type-S
2008 Alfa Romeo MiTo
1960 Chevrolet Corvette C1
1996 Chevrolet Impala SS (Jan Jalopnik Pack)
1986 Dodge Shelby Omni GLHS (Jan Jalopnik Pack)
2011 Ford F-150 SVT Raptor (Dec IGN Pack)
2003 Ford SVT Focus
1965 Ford Mustang GT Coupe (Jan Launch Pack)
1957 Ford Thunderbird
1999 Honda Civic Si Coupe
1995 Honda CR-X Del Sol SiR
1991 Honda CR-X SiR
2003 Hyundai Tuscani Elisa
2010 Kia Forte Koup SX
2001 Mazda Mazdaspeed Familia
1972 Mercedes 300 SEL 6.3 (Apr Alpinestars Pack)
2009 Mercedes A200 Turbo Coupe
1988 Mitsubishi Starion ESI-R
1968 Plymouth Barracuda Formula-S
1987 Pontiac Firebird Trans Am GTA
1980 Renault 5 Turbo
2009 Renault Twingo Renault Sport Cup
2002 Toyota MR-S
1985 Toyota Sprinter Trueno GT Apex
1998 Volkswagen Gti VR6 Mk3

D to F
1992 Toyota Supra 2.0 GT Twin Turbo

E to F
1980 Abarth 131 Abarth
1965 Alfa Romeo Giulia Sprint GTA Stradale
1979 Chevrolet Camaro Z28
2004 Chrysler PT Cruiser GT
1966 Ford Country Squire (Mar Pirelli Pack)
1977 Ford Escort RS1800 (Dec IGN Pack)
2009 Ford Fiesta Zetec S - F with drivetrain, aero, 193 with aspiration
1994 Honda Civic 1.5 VTi
2009 Honda Fit Sport
1962 Lincoln Continental (Aug Playseat Pack)
1971 Lotus Elan Sprint
1956 Lotus Eleven (Jul car pack)
2011 Mazda 2
2005 Mazda Axela Sport 23S
1985 Mazda RX-7 GSL-SE (Apr Alpinestars Pack)
1969 Nissan Fairlady Z 432
1971 Nissan Skyline 2000GT-R
2009 Nissan Versa SL
2009 Scion xD
2011 Suzuki SX4 Sportback
1989 Toyota MR2 SC
2008 Toyota Yaris S

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Hi. For so long I have been trying to detune 1960 Chevrolet Corvette C1 from D to E but just could get the last point. 277, 276 - 275!

I finally got there by with these installs.

Default 277
install Forza front bumber 276
install race differential - 276
install heavy Rims (Dub Big Chips) +2kg - 276
install front rim style 185/65R18 (the 3rd one) - 275 YEAH!

PS I’d also like know about the 2009 Holden HSV w427 from A to B, thx.

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pretty sure that car needs the intercooler weight. (AKA the aspiration glitch, AKA the turbo glitch) - not really a glitch, more like a trick ;^) … adds weight without adding HP. kind-of like you discovered with wheels and the Race Diff. (and sometimes with Roll Cages). Oh and, some cars go lower PI with transmission changes -without adding any weight. And race cars can go down by adding drag tires (at the expense of grip!) - each method, different trade-offs… anyway, try this for the Holden:

Buy a Turbo or a Super Charger from the Conversions menu and then back out to the Engine menu and upgrade that Turbo or SC to Race. Now, and this sounds weird, sell that Race Turbo or Race SC you just bought and back out to the Engine menu where you should still be able to scroll over and have the option to add an intercooler. Add one of the intercoolers (each adds a different amount of weight) and you’ll be adding the weight of the intercooler without adding any additional HP. (there are, I am sure, better descriptions How To on the intertubes if that wasn’t clear enough)

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Some cars can be converted from a charged aspiration to natural aspiration. This is only possible if the car begins with a turbocharger or supercharger and has another turbo or supercharger aspiration conversion option. Buy the conversion, go to upgrades and buy the Race upgrade for that charger, sell the upgrade, then put the car up for Auction. Remove the car from auction, and it will now be recognized by race restrictions as naturally aspirated, allowing you to drive the car in events it previously was excluded from based just on aspiration. This process also lowers PI due to reducing horsepower. Old forum thread: http://legacy.forums.forza.net/forums/permalink/5292064/5292045/ShowThread.aspx#5292045

Boost-to-Natural-Aspiration conversion cars (stock class and PI):
2011 BMW 1 Series M Coupe B 487
2012 Chevrolet Camaro ZL1 A 572
2009 Chevrolet Corvette ZR1 S 633
2005 Ford Ford GT A 578
2007 Ford Shelby GT500 B 477
1991 GMC Syclone C 385
1992 GMC Typhoon C 376
2009 Jaguar XKR-S A 524
2012 Jaguar XKR-S A 563
2006 Koenigsegg CCX R3 712
1982 Lancia 037 Stradale C 362
1997 Mazda RX-7 (FD) B 441
1969 Nissan Fairlady Z 432 E 205
2005 Panoz Esperante GTLM A 527
1982 Porsche 911 Turbo 3.3 (930) B 449
2000 Saleen S281 B 447
2010 Saleen S5S Raptor S 623
2006 Saturn ION Red Line C 392
1989 Toyota MR2 SC E 272
1992 Toyota Supra 2.0 GT Twin Turbo D 290
1998 Toyota Supra RZ B 461

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Nice one, thanks very much for this list. Turn 10 should be paying you for all these lists.

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Thanks for posting this Manteo, I forgot about several cars that can be detuned, especially some boosted cars. Got to try them out!

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Awesome list gonna use some of the cars for the career mode.
Especially the F Class career sucks in the stock F cars.

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Hi ManteoMax. Like the list (maybe just * the ones that need the auction to work). I don’t have Xbox Live Gold (yet) so I can’t do Boost-to-Natural-Aspiration conversion cars (can’t use the auction :frowning: as I’d like to detune 1982 Toyota Supra to class F&E)

I have suspected that the 2009 Holden HSV w427 could be detuned to class B. I can get to PI 501 but that’s it. What am I missing?

To get to 501 installed as follows:
Forza Front Bumper
Forza Rear Wing
Rims - Dub Big Chips
Upgraded Rear Rim Size 275/25R21
Differential - sport or race
everthing else is stock as to me it raises PI. (Sport Transmission was the trick for 1982 Lancia 037 Stradale from C to D).

Thanx.

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Thx Design, that worked a treat. And didn’t need to put it up for auction so XBLSilver can do it too. I’ll have a got at detuning the Lancia 037 from C to E next while I still have access to the auction house. That tip about the auction house and returning bid credits worked too. I didn’t realise I had bid what I had.

see ya round the tracks. KK42.

PS Honorary first membership of Club49 to you.

I might need to offered better cars though. Any chance anyone out there like to be patron? Have a look in the Clubhouse section for a giggle with/at Krusty.