Overview

  Welcome to 2002 Twin Turbo.com:
   
 

    Welcome to the 2002 twin turbo web site. This site was constructed to “pay forward” all of the design ideas that Joe and Paul Cain have accumulated over the past 30 years. Many people in the BMW community have willingly shared their knowledge with design and fabrication techniques - techniques that were very instrumental in achieving the quality levels on this project. This site is intended to reciprocate, by disclosing all of the details involved in blending old technology with the new. We have received many questions since the twin turbo has been completed. Every effort has been made to provide detailed text descriptions with each photo to share the passion and possibly inspire someone else to take it to the next level with their project – BMW or otherwise. If you see errors or issues, or have further questions about the car, please contact us.

Thank you and enjoy,
Paul Cain

 Overview Photo Gallery    
 Index of All Photographs

Overview

  Technical Details: Paint & Body | Interior | Turbo Motor | Driveline | Rear Suspension | Front Suspension | Unique Details

  Custom Parts: Carbon Fiber Hood & Trunk | Carbon Fiber Intake Manifold

  Technical Specifications:
  Price *index of all images       Engine

List price, all POE

$---,000.00  
Type 6 cyl. Inline, DOHC
Bore x stroke 84mm x 89.5mm
Equivalent in 3.31 x 3.53
Displacement cc / cu in 2979 /182
Compression ratio 10.5:1
Bhp rpm, net 335 @ 5900
Equivalent mph 142
Torque @ rpm 316 @ 5500
Equivalent mph 126
Fuel Injection Autronic
Ignition Autronic
Type fuel required premium
Emission control lambda oxy. sensor

Price as tested

$---,000.00

Price as tested includes standard equipment:

(3.0 Liter DOHC twin turbo / intercooler, 5 speed sport transaxle, sunroof, 17 BBS wheels, roll cage, full leather interior, etc.)

  General General Technical Photos  
 Drivetrain
Driveline Photos
Curb weight, lb/kg
2680 / 1218
Test weight, lb/kg
2740 / 1245
Weight dist(with driver) f/r %
51/49
Wheelbase, in
103.4
Track, front / rear, in
58.8/58.0
Overall length, in
166.25
Width
63.75
Height
52.7
Ground clearance
4.8
Overhang, front / rear
38.2 / 42.0
Usable trunk space, cu. ft
14.5
Fuel tank capacity, U.S. gal
7.5
Transmission 5 spd. manual
Gear ratios 5th (.81) 2.63:1
4th (1.00) 3.25:1
3rd (1.40) 4.55:1
2nd (2.20) 7.15:1
1st (3.82) 12.42:1
Final drive ratio 3.73:1

 

  Maintenance
Service intervals, mi.:
Oil/Filter change 3500
Chassis lube none
Tune-up, mi 15,000
  Accommodation     Instrumentation
Seating capacity
2
Seat width
Front: 2 x 22.5
Rear: 2 x 20.5
Head room, front / rear
36.5 / 36.0
Seatback adjustment, °
0
 

150-mph speedo, main & trip odo, 8000-rpm tach, water temp, oil press., oil temp, fuel level Warning lights: oil pressure, alternator, fuel directionals, low beam xenon, handbrake, rear window heater, rear fog lamp, emergency flasher

  Chassis & Body       Calculated Data
Layout front engine / rear transaxle
Body / Frame unit steel / 8pt. rollcage
Brake system Front: Brembo Calipers13.2-in. (328-mm) vented / cross drilled discs
Rear: 12.7-in. (320mm) vented / crossed drilled rear, vacuum assist
Wheels Front: BBS OEM 2 pc. alloy (2) 17x7.5
Rear : (2) 17x8.5 in.
Tires Michelin Pilot Sport 205 / 40 Z-17
Michelin Pilot Sport 235 / 45 ZR-17
Steering ZF Rack and Pinion power Assist
Turns, lock to lock: 2.1turns
Front Suspension MacPherson Bilstein struts, adj. lower A arms, l coil springs, adj. anti-roll bar, adj. camber
Rear Suspension semi-trailing arms, Bilstein motorsport coil over shocks, adj. toe / adj. camber, adj. anti-roll bar
 
 
Lb / bhp (test weight) 11.2
Mph / 1000 rpm (4th gear) 19.5
Engine revs / mi (60 mph) 2160
Piston travel, ft / min 1520

Overview

  Picture Galleries:  
   
    More detailed technical pictures are available in the 'Tech Information' section of the web site
 
  Press Coverage:
     BMW Scene Magazine
     
  Pages 70, 71
  Pages 72, 73
  Page 74
 
 
     Performance BMW Magazine
  Table of Contents  
  Pages 36
  Page 38
  Pages 40
Page 42
 
     Roundel Magazine
  Page 54  
  Page 55
  Page 56
  Page 58
Page 59
 
     European Car Magazine
  Page 76  
  Page 77
  Page 78
  Page 80
 
    BMW Car Magazine
    Page 30  
Page 31
Page 32
Page 33
Page 34
Page 35
Page 36
 
 
  Other Media:
        Full Undercarriage Picture
        Turbo Motor Sound Clip #1
   

Overview

Comprehensive Thank-You List  
   
Special Thanks Go To:
   
  Joyce Cain  
    The deepest gratitude is owed to Joyce for the sincerity of her support for this hobby.    
    (Pictured right, during the Roundel Placement and Dedication Ceremony.)  
   
 
 
 
  Joe Cain
   
My brother Joe has collaborated in significant projects in the past, like our BMW e21 m50 engine conversion, all his work. Joe’s enthusiasm on this project spiked when I said in 2001 that it was going build a hot rod BMW. All of a sudden it was non-negotiable -the car WOULD have a carbon hood, carbon trunk and intake manifold. All items that Joe (in his day job) tooled, fixtured, fabricated and finished. This was a giant effort and hundreds of hours more than either of us planned. Lastly, thanks to Joe for talking me out of the 4WD system idea(E30 325ix based?). Scary - as we had all the parts on the garage floor. Joe’s comment; “if you do this it will take two more years and be too heavy”. This decision started the 2 wheel drive Lightweight design theme and sparked the idea of using a transaxle. . . Joe was an enormous, quiet contributor.
   
           
 
Tom Rakestraw
   
     Tom Rakestraw, who came into the project in 2003, was first an observer. Tom instantly locked in and understood the OEM design / evolution discipline used in this project. Up until then, the only person I would really listen to (on any design idea), was Joe. Rakestraw starts hanging around. And then helping. Then contributing ideas. Some of them were really, really good. Ideas like the simulated louvers on the carbon hood, the whole center console, the whole rear deck and partial shelf. Unlike some garage buddies, Rakestraw shows up with serious woodworking tools and starts fabricating beautiful custom parts, out in my driveway. The only down side is that some of Rakestraw’s ideas are really expensive. When you know it is right, you have to do it; I relish the idea of reciprocating on his next restoration. I already have some idea$.
   
  Butch Severloh
    Butch Severloh, owner of S and S Engineering, was highly involved in the 3.8CSi. Butch also improved the fabricating quality on each one of the hundreds of custom Twin Turbo parts. An equally enthusiastic hot rodder, Butch allowed me unlimited (very scary) access to his precision sheet metal fabricating shop. Butch taught me an incredible amount about the fine art of fabrication and volunteered numerous hours in helping with the really difficult parts on the car. The merciless abuse I would take if each edge and each bend on every part was not perfect, I would not trade for the world. I am on year 12 in the Severloh training program and have only 8 more to go until I am full apprentice! You know the guy is enthusiastic when he breaks down a production machine to run one piece for a hot rod project. There is no finer enthusiast or teacher. If you notice the perfect and beautiful MIG weld beads on the car – that would be Butch. Thank you.
   
 
  Dominic Herrera
    Dominic Herrera for his enthusiastic effort with the bodywork, sanding and this web site. Dominic was the designer of www.38CSi.com and his work is sooo “factory”. Dominic worked with Wayne Golden at Golden Autobody and was key in completing the paint job. Dom designed and built this web site, he speaks fluent HTML and is a very quick learner. At half my age, Dom is in some respects twice as smart. If you equated one’s IQ to horsepower, Dominic would be the “Top Fuel” of the cerebral set. Thank you for keeping me in the (www) 21st century. He's currently doing environmental work for the State of California. On the side, he is available if you need web site maintenance or construction. Dominic Herrera can be reached at by e-mail for web site, I.T. consulting or trouble-shooting and surf trips..
   
 
  Ben Strader
   
Thru an introduction by Butch Severloh, I met Ben Strader, the founder of EFI University. If you ever aspire to really understand engine management theory and fundamentals there is no better source than taking a class from Ben. View: www.EFI101.com. He has a amassed a staggering amount of engine management knowledge and has leveraged it into course materials that work at every level. I was lucky enough that Ben took an interest in the twin turbo at its mid-point. We had just installed the entire drivetrain, trying to start the car and the Bosch system was clearly not going to work. At this point we abandoned the stock ECU and literally cut the mating connector off of the harness. Ben directed us to Autronic as a system that can read all the stock sensors, drive VANOS, provide full control over both fuel and ignition maps and provide full electronic control of the boost. After rewiring and buying all the hardware, Ben provided a “house call’ and within 3 hours had the car running. Once the car was fully assembled we put it on the dyno and on the second session hit 335 HP with 6.7 lbs of boost. These successes would not have been possible without his support. We are not finished yet, next year if we get some lower compression pistons and a new………
   
 
  About The Owner:
   
Paul Cain has been a member of the BMW CCA since 1987 and has completed numerous restorations on both British and German cars. His automotive background includes program manager for airbag crash sensors and inflator products for TRW and Director of Operations for TRW Steering and Suspension in Sydney, Australia. Most recently Paul was Director of Sales and Marketing for Duncan Electronics, a manufacturer of position and steering sensors for the automotive, agriculture and heavy equipment markets. His prior automotive work was featured on the cover of the BMW CCA’s August 2000 Roundel with his 3.8 CSi. This car has won numerous concours and was the People’s Choice award winner at the 2002 Octoberfest in Colorado. Earlier work included a collaboration with Joe Cain on the E21 3 series with M50 6 cylinder conversion featured in the August 2001 edition of Bimmer magazine. In 2006 Paul completed the 3002TTiL and was soon thereafter featured on the cover of the BMW CCA's July 2006 Roundel Magazine. The 3002 was recognized by Mr. Tom Purves, Chairman of BMW NA at the 2006 Concorso Italiano BMW CCA contest with first place in the concours category and People’s Choice award. Recent articles appear in January 2008 BMW Car and in October 2007 European Car magazines. Paul's prior restorations include two 2002tii’s, a Jaguar XKE and a Sunbeam Tiger. Like the previous efforts, all work is undertaken is at home within a single-space residential garage.
   
 
 Related Web sites:
        e9 Coupe.com
        38CSi.com
        S&S Engineering.com

Overview

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