Johan Gronberg (JG Automotive) - Opel Kadett GSi 2.1L C20XE

Johan Gronberg at Swedish Indoor Show

Johan's Kadett was on show at Sweden's biggest indoor car show in March 2007. The car has been built for 1/8 mile and 1/4 mile racing (dragracing)
and is street legal.


Johan Gronberg engine

 

His 2.1L C20XE has been built with our 4th upgrade taper throttle kit although Johan arranged for the headwork to be done himself. He also has a dry sump system.

Email received from Johan, June 2007:

As I only want high peak power, this 4-1 header is a better solution for me (dragracing), it made 260bhp and 248nm with 33/29 valves.
We have only been mapping it from 6000-8500rpm because there was no time for the low
revs. (competition day after). The car feels really strong now.

I made 12.58sec with a bad 2.1sec 60 foot time (it was raining) and 181.5 km/h topspeed at 1/4mile
I am hoping for a high 11sec time with some better grip.
I have won every event except one in Sweden, the one I didn´t win was because my flywheel bolts fell off =( but its ok now again. =)

I have a movie from the event:

http://www.youtube.com/watch?v=smJVlL0Iizc

and one from the dyno day:

http://www.youtube.com/watch?v=QGFKScq5KO4


You can also see some more pictures of my project thread at Swedens biggest carcommunity: (it´s all written in swedish, but the pictures are free for you to use, if you want at your webpage.

http://www.zatzy.com/showthread.php?t=201705

Information received January 2008:

Opel Kadett GSI 16v -89 (vauxhall astra mk2 gte 16v)drysumped 260bhp 248nm N/A with 33/29 valve SBD powered c20xe engine and a custommade 4-1 3stepped race header. It has a quaife close ratio striaght cut gearbox with 4.50 final gear, Dot approved "street legal" MH 205/65R13 tyres, the car is street legal (taxed and MOTed) chassis are optimized for dragracing.best times:1/8mile: 7.70sec 152km/h1/4mile: 12.25sec 185km/hincar 1

Johan's car in Sweden

1/8mile @ Malmoe (my first ride with tha car) http://www.garaget.org/video/zo3inhla2z4k