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MadMarx
Christian Marx
Germany
(47 posts)

Registered:
01/02/2014 11:54AM

Main British Car:
1977 Triumph IMSA TR8 Group 44 Canada Rover 4L

authors avatar
Nürburgring racing
Posted by: MadMarx
Date: October 21, 2019 02:15AM

I had some questions about the car regarding different tires and compounds.
I've booked a race with forecasted rain.
The good thing, on Friday I could test things in dry, and on Saturday in the wet...to have a direct compare.
[www.youtube.com]

[www.youtube.com]


Bland
Tim Bland
Oregon
(33 posts)

Registered:
01/22/2017 11:15PM

Main British Car:
1980 Triumph TR8 Rover 3.5

authors avatar
Re: Nürburgring racing
Posted by: Bland
Date: October 21, 2019 12:50PM

Hi Christian,

What did you end up using for rain tires and what are you running for slicks?

Regards,

Tim


MadMarx
Christian Marx
Germany
(47 posts)

Registered:
01/02/2014 11:54AM

Main British Car:
1977 Triumph IMSA TR8 Group 44 Canada Rover 4L

authors avatar
Re: Nürburgring racing
Posted by: MadMarx
Date: October 22, 2019 03:57PM

You've PM


roverman
Art Gertz
Winchester, CA.
(3035 posts)

Registered:
04/24/2009 11:02AM

Main British Car:
74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L

Re: Nürburgring racing
Posted by: roverman
Date: October 24, 2019 11:19AM

Great video's ! Looks like you're using about 5,700 as a max rpm ? Seems low for a full- worked 4L ? Car is ratio limited ? Roller cam ? Billet crank ? Cheers, Art G.


MadMarx
Christian Marx
Germany
(47 posts)

Registered:
01/02/2014 11:54AM

Main British Car:
1977 Triumph IMSA TR8 Group 44 Canada Rover 4L

authors avatar
Re: Nürburgring racing
Posted by: MadMarx
Date: October 25, 2019 04:27AM

we changed the configuration of the engine.
It was a high reving engine.....but we backed off the top end power about 50 hp and lifted up the torque significantly. Much handier to drive than using high revs.

But certainly the engine can do 8k technically but from the cam power stops at about 7K.

Flat tappet cam, roller rockers, billet crank.



Edited 1 time(s). Last edit at 10/25/2019 04:31AM by MadMarx.


roverman
Art Gertz
Winchester, CA.
(3035 posts)

Registered:
04/24/2009 11:02AM

Main British Car:
74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L

Re: Nürburgring racing
Posted by: roverman
Date: November 07, 2019 07:46PM

Roller cam not allowed ? I know a guy with 1 or 2 rollers...…..


MadMarx
Christian Marx
Germany
(47 posts)

Registered:
01/02/2014 11:54AM

Main British Car:
1977 Triumph IMSA TR8 Group 44 Canada Rover 4L

authors avatar
Re: Nürburgring racing
Posted by: MadMarx
Date: November 14, 2019 02:19PM

Roller Cams are allowed.
What would be the advantage?



roverman
Art Gertz
Winchester, CA.
(3035 posts)

Registered:
04/24/2009 11:02AM

Main British Car:
74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L

Re: Nürburgring racing
Posted by: roverman
Date: November 14, 2019 02:50PM

Less drag and wear. Faster opening and closing of valves= more HP and torque,(with the right cam). Art.


MadMarx
Christian Marx
Germany
(47 posts)

Registered:
01/02/2014 11:54AM

Main British Car:
1977 Triumph IMSA TR8 Group 44 Canada Rover 4L

authors avatar
Re: Nürburgring racing
Posted by: MadMarx
Date: November 16, 2019 04:28AM

I maybe build another engine and try out rollers.


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