Ultimate 83 GTI Summary

The Ultimate 83 GTI Summary

Ultimate 83 GTI Specifications Summary

1800lbs in track trim, 1950lbs in street trim (with some options removed)
240hp from 7,250-8,000rpm w/o catalyst or air box, 220hp from 7,000-7,400rpm with catalyst, air box and filter
Up to +100hp with progressive ECU controlled nitrous system
Hidden chassis frame and stiffening throughout
Carbon fiber hood, hatch and bumpers, Lexan rear window
Epoxy primer -> wet sanded glossy clearcoat
New OEM interior throughout – gorgeous NOS seat fabric, new firm foam
Mk3 ABA block, Mk2 16V heads, 288 solid lifter cams, oversized 34/29.5mm valves
95.5mm stroker crank, 11.5:1 83.5mm pistons (2092cc)
Custom curved ITB intake, Lexan air box, with dual fuel rails
Stainless steel braided hoses with race spec AN fittings used throughout
1.75” primaries stainless steel race header, 2.25” stainless steel exhaust, 2.50” tip
Custom built VW 020 5 speed close ratio transmission with Quaife LSD, 100mm flanges
Stage 3 and stage 5 clutch systems (stage 5 currently installed)
500hp rated race axles
Custom radiator, electric water pump/controller
Custom oiling system with external filter and oil intercooler
25Amp-Hour 13.5V Lithium battery system, computer controlled alternator charging
Holley Dominator ECU with 150 inputs/outputs
Holley touch screen digital dash, Holley individual coil race ignition
Wilwood/Tech-53 big 4 piston calipers, 10” rotors, Hawk pads, adjustable proportioning valve, rear disks, ECU controlled servo vacuum – console adjustable
KW V3 stainless steel struts/shocks compression/rebound adjustable in 16 steps, multiple spring sets for street and track use
Hollow rear 28mm sway bar
Urethane and Delrin bushings used throughout suspension and steering system
Special shift linkage – ultra precise shifting
Leather wrapped OEM steering wheel, custom steering column & u-joints
Quaife close-ratio rack & pinion - blissful steering precision & feel
Brand new sunroof mechanism
Electric windows, seat heaters, Air conditioning system
1200W Bluetooth audio system
Philips LED headlights, LED bulbs used throughout
Looks dead stock inside and out but outperforms a Porsche 718 Cayman S on the track
Meticulously documented on youtube with >180 videos and >800 photos online

Media coverage on this car: VW Newsroom, Automobile Magazine, Motor Trend Magazine, Classic Cars Journal, CarBuzz, Auto Blog, Yahoo Entertainment, MSN, Motor 1, AutoWeek, Car & Driver Magazine, Classic Cars, Hagerty, Hemmings, Top Gear, The Drive, and many more international web sites. Amazing. Thank you everyone!

A full 125 page PDF document on the car can be found here - for best viewing, download it and display on a wide screen monitor in full screen '2 up' mode.

A video version of this document with a detailed walk-around inspection is available here: https://youtu.be/e84opR4w0Jc

The parts/price list of this project is added an an appendix to the PDF document but can also be found separately here in an easier to read format: http://www.derekspratt.com/PDFs/Automotive/1983 VW GTI 2/Ultimate_83_GTI_parts_list.pdf

Holley ECU related software and product descriptions: https://www.holley.com/products/fuel_systems/fuel_injection/dominator_efi/dominator_ecu/parts/554-114

My ECU Global Config files: www.derekspratt.com/Misc/GTI_Holley_Global_Files.zip

Kicker IQ1000.5 Amplifier related Apple iOS software: https://apps.apple.com/us/app/tweeq/id1001591656 and PC application: https://www.kicker.com/tweeq

My IQ1000.5 Config file: www.derekspratt.com/Misc/GTI_Kicker_TweEQ_Config.CFG