Katla Turbo

Detailed Car Specs

Drivers of Katla Turbo

Year Driver
2019 Grétar Óli Ingþórsson
Elvar Bjarki Gíslason
Guðbjörn Grímsson
2017 Guðbjörn Grímsson
Kristján Birgisson
Elva Stefánsdóttir
2016 Guðbjörn Grímsson
2015 Guðbjörn Grímsson
Sigurður Þór Jónsson
2014 Ingólfur Guðvarðarson
Guðbjörn Grímsson
2013 Guðbjörn Grímsson
2012 Guðbjörn Grímsson
1989 Guðbjörn Grímsson
1988 Guðbjörn Grímsson
1987 Guðbjörn Grímsson

Detailed description of Katla Turbo

Type of Engine Ford 351/428 Stroker Twin Turbo
Horsepower 800 - 1700 hp
Turbo / NOS 2 x 72 mm NRE Turbo
Max Boost 36 psi
Block Dart Aluminum 9.500 Block
Piston JE Pistons
Cylinder Heads AFR Cyl Heads
Intake Manifold Hogans Sheetmetal dual injector intake manifold
Camshaft Custom NRE Camshaft
Crankshaft Callies 4340 forged 4.0 stroke crankshaft
Connecting Rods 6.400 Oliver billet connecting rods
Injection System Electromotive Tec3r injection system
Engine Builder Nelson Racing Engines
Intercooler Water cooled
Torque 760 - 1440 lb/ft
Fuel VP Racing C16
Type of Transmission Ford C6
Input Shaft TCS 300 Maraging
Clutch Drum TCS Billet Steel Forward Clutch Drum
Converter Stall TCS Converter stall at 4200
Gears 3
Transfer Case
Type of Transfer Case Ljonstadir Special
1-1 lightweight aluminum 15kg
Axels Front Axle Rear Axle
Housing Custom 9" Ford Custom full floating 9" Ford
Axles RCV Custom 35 spline gun-drilled M300 RCV Custom 35 spline gun-drilled M300
Differential Ratio 4.11 4.11
Case Moser Aluminum Case Moser Aluminum Case
Locker Spool Spool
Knuckles GK Racing double CV knuckles
Joints RCV Double CV
Steering Ratio 58°
Suspension Front Rear
Shocks ORI 14" STX Strut with Integral Reservoir ORI 14" STX Strut with Integral Reservoir
Trailing Arm Triangulated 4-link Double triangulated 4 link
Type of tire Hosier w/ Bigger Digger
Tire Size 34,5 / 17-16"
Type of Wheel Homemade Aluminum
Wheel Size 17x16"
Brake Caliper Wilwood
Brake Pads Wilwood
Brake Discs Wilwood


The Car
Katla Turbo was originally born in Wayne, Michigan in the year 1972 when she proudly came out of production as a 6 cylinder, golden brown Ford Bronco with manual hub. She wasn’t in Guðbjörn’s possession until 1983and did he rush into modifying her to an Off-Road car. The 6 cylinder engine was ripped out from her chest and instead came 351 Turbo along with brand new axles, in front Dana 44 with super axles and in the rear Dana 60 which later on turned into 9″ full floating axles.

Katla was not only used in the mountains but did Guðbjörn compete on that very same car in Formula Off-Road in 1986-’87 but in ’88 futuristic changes were made. He built the entire body from fiberglass and aluminum and extended the car 25cm between wheels. The engine was moved further back and downwards and springs were set up in the rear which had never been done before at that time in Iceland.

She was then sold and was only used up on the mountains for few years. Katla returned to her previous owner 10 years later but was kept in hibernation for few more years.

In 2011 Sigurður Þ. Jónsson, the team captain, called Guðbjörn up and asked if it wasn’t the time to build a Formula Off-Road car. By that phone-call the latter competition career for Katla began. She had no engine and Guðbjörn’s dream was a twin turbo engine with approx. 700 hp then he stumbled across Nelson Racing Engine. That engine has 1640 hp which was just over 900 hp greater than he had imagined. The axles were then too weak to handle that kind of power so the whole drive-line was changed. The old chassis was thrown away and replaced by steel tubes. The old fiberglass and aluminum body didn’t fit the structure of the new and improved Katla so other one had to be made.

To sum up, the beautiful ’72 golden brown bronco had completely vanished in the 2011 modification but it’s still the same one. After all, Katla Turbo is the only off-road car Guðbjörn has ever had.

Guðbjörn Grímsson

Guðbjörn went to his first competition as a spectator back in 1983 in Grindavík. His first race was in 1986 on Akureyri and did he compete on his ’72 Ford Bronco for three years, yet racing wasn’t enough for him so he started to meddle with the organization of the events in 1986. When he stopped competing in 1988 he started an association called Jeppaklúbbur Reykjavíkur and did Guðbjörn sit as Chairman until 1990. Not only does he have his fingers in the Icelandic competitions but has spread out to Norway as well. Today we drive according to the rules and regulations he among other have written.

Although Guðbjörn is well-known for his rules and regulations he achieved titles such as Icelandic Champion in 1987 and Best in Show a few times, most recently in 2014 for his world record Hydroplaning.

Grétar Óli Ingþórsson

Elvar Bjarki Gíslason

Elva Stefans

Elva is the social media manager and creative director of Volcano Racing (Katla Turbo) and FOIceland. She also shoots and edits videos for FOIceland.
Her IFO career started in 2013 where she helped Formula Offroad Club with their race in Vestmanneyjar. On that raceday she met the owner and driver of Katla Turbo, Guðbjörn Grímsson.

They have been working together ever since that day. They have taken many tasks in their hands and have the results of those tasks been amazing. Just to list a few they have:
– Put together this website
-Brought IFO to the USA
– Found new and creative ways of advertising IFO worldwide
-They’ve been entrepreneurs on social media and marketing their teamþ

Not only has she been working behind the scenes but she raced for the first time in IFO in 2017 on Akranes when Guðbjörn loaned the car to her. She also participated in the race in USA that same year. Which made her the first female to compete in IFO in America.

In 2018 extreme renovations took place in Katla. They tore the car to pieces and the plan was to rebuild the whole thing. So when they went to USA again in 2018 they didn’t have their IFO car to race in, but fortunately for Elva, she was offered “The Raging Hornet” which is a Rock Bouncer that was competing in Bikini Bottoms Off-Road Park. Making her the first Icelandic female to compete on a bouncer.

The rebuild of their car finished in May 2019 and will she try out the new build soon enough.

Kristján Birgisson

Kristján started as a part of a service team for champions like Sigurður Þór Jónsson, but in 1994 he got the chance to get behind the wheel himself! Now we’ll see him behind the wheel of Katla Turbo in Bikini Bottoms Offroad Park where he will participate in the second annual Icelandic Formula Offroad in USA.

Guðni Jónsson

Sigurður Þór Jónsson

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