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Old 21 Sep 2019, 15:23 (Ref:3929239)   #361
Oneball
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Thanks both.

Do you know if there’s a reason why some extensions to homolgation forms aren’t dated? For example ext 4 on 583 for the Corvette.
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Old 22 Sep 2019, 09:04 (Ref:3929369)   #362
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Thanks both.

Sorry for the slow reply, I've tried to say thanks loads of times but it never seems to get published.

Is there a formal route if I have a questions regarding a HTP/homologation/spec? When I ask our ASN they more or less refer you to the regs and say it'd be up to the FIA to decide.

I'm looking at the papers for a C3 Corvette, 583 and there is no date on extension 4
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Old 22 Sep 2019, 12:35 (Ref:3929413)   #363
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Thanks both.

Do you know if there’s a reason why some extensions to homolgation forms aren’t dated? For example ext 4 on 583 for the Corvette.
I think you will find that the dating for Ext 4 has the same dating as Ext 3 , because they were probably introduced at the same time .
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Old 22 Sep 2019, 14:31 (Ref:3929437)   #364
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I think you will find that the dating for Ext 4 has the same dating as Ext 3 , because they were probably introduced at the same time .
I think that's unlikely as ext 3 is dated 1969 and the 454cu engine listed in ext 4 didn't come out till the end of 1970.
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Old 23 Sep 2019, 12:21 (Ref:3929655)   #365
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Thanks both.

Sorry for the slow reply, I've tried to say thanks loads of times but it never seems to get published.

Is there a formal route if I have a questions regarding a HTP/homologation/spec? When I ask our ASN they more or less refer you to the regs and say it'd be up to the FIA to decide.

I'm looking at the papers for a C3 Corvette, 583 and there is no date on extension 4
583 3 Chevrolet Corvette Sting Ray 19467 6997 01.06.1968
583 3 1/1V 01.07.1968
583 3 2/2V 01.07.1968
583 3 3/3V 01.01.1969
583 3 4/4V 01.01.1970
583 3 5/5V 01.01.1973
583 3 6/1E 01.04.1974
583 3 7/6V 01.04.1974
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Old 23 Sep 2019, 12:59 (Ref:3929658)   #366
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Thanks Duddha
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Old 23 Sep 2019, 16:23 (Ref:3929692)   #367
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Slightly off piste question for the learned masses....

An orange marker light on the roof of the car to help pit crew locate the car from the pit wall...does this need to appear on the HTP’s? This came up at scrutineering at Monza.

I struggle to believe that all the additional spot lights etc that get added for 6 hours and other night events appear on the papers....
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Old 24 Sep 2019, 07:06 (Ref:3929826)   #368
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Slightly off piste question for the learned masses....

An orange marker light on the roof of the car to help pit crew locate the car from the pit wall...does this need to appear on the HTP’s? This came up at scrutineering at Monza.

I struggle to believe that all the additional spot lights etc that get added for 6 hours and other night events appear on the papers....
It must be on the HTP, lighting is part of the specification but reality and 6 hours show that very few cars are either running to the HTP specification or even hold a valid one.

I spent the last two years in a garage with a team that in-between scrutineering and practice would change half of the engine bay, add lighting and even had fake coper/rust painted on an aluminium radiator
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Old 24 Sep 2019, 18:19 (Ref:3929931)   #369
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thanks Louis!

...the lengths people go to win a cheap trophy!
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Old 24 Sep 2019, 18:50 (Ref:3929934)   #370
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You again, Will! You laugh… You've better have a look to the picture on your HTP, may be you'll be asked to supply crushed mosquitoes as seen in period! I mean the same ones… Compare to this search half a potato is nothing at all!
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Old 24 Sep 2019, 20:58 (Ref:3929953)   #371
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You again, Will! You laugh… You've better have a look to the picture on your HTP, may be you'll be asked to supply crushed mosquitoes as seen in period! I mean the same ones… Compare to this search half a potato is nothing at all!
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Old 25 Sep 2019, 07:45 (Ref:3930026)   #372
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You again, Will! You laugh… You've better have a look to the picture on your HTP, may be you'll be asked to supply crushed mosquitoes as seen in period! I mean the same ones… Compare to this search half a potato is nothing at all!
Sorry Gerard but I believe that historic cars should look period and this includes lighting. Spa 6 Hours is a must see to understand that with GT40s sporting rally additional lighting like they never did or half of the grid looking like christmas trees and sporting LED anywhere possible.

The truth is lighting is much better than in period without the need to run full LED bars or Xenon lighting and I do wonder how my Uncle did win so many 24h races in the VdeV series with only period lights on a B16, like the whole grid back then or how did the true professional drove way better and faster without the need for all these technologies.
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Old 25 Sep 2019, 11:14 (Ref:3930047)   #373
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Old 25 Sep 2019, 21:58 (Ref:3930136)   #374
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Mike - did the engine change go OK, and which pitbox are you in?
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Old 26 Sep 2019, 12:55 (Ref:3930219)   #375
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What is allowed with regards to engine blocks and HTPs? Despite having been involved in historic motorsport for 25 years I've been banging my head against a brick wall for weeks trying to find an answer to this question.

Can I use a later engine block that has a different casting number if it is the same in terms of spec, material, dimensions and manufacturer as that originally fitted?
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