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 1971 Can-Am | Pre-season Testing [Dec 31st - Jan 4th]

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Richard Wilks
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PostSubject: Re: 1971 Can-Am | Pre-season Testing [Dec 31st - Jan 4th]   Tue 2 Jan 2018 - 11:22

The 917k in the mod is not the turbocharged version.

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David Jundt
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PostSubject: Re: 1971 Can-Am | Pre-season Testing [Dec 31st - Jan 4th]   Tue 2 Jan 2018 - 15:53

The TC version only appeared from '72 on, but conquered the titles over the following two years(Follmer&Donohue).

I read that the 917/10 had a top speed of 343 km/h, but I barely got above 300 km/h, not sure what I can do to get more out of the gearing.

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Richard Wilks
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PostSubject: Re: 1971 Can-Am | Pre-season Testing [Dec 31st - Jan 4th]   Tue 2 Jan 2018 - 16:03

David Jundt wrote:
The TC version only appeared from '72 on, but conquered the titles over the following two years(Follmer&Donohue).

I read that the 917/10 had a top speed of 343 km/h, but I barely got above 300 km/h, not sure what I can do to get more out of the gearing.

Thats a le mans top speed by a WSC spec 917.

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PostSubject: Re: 1971 Can-Am | Pre-season Testing [Dec 31st - Jan 4th]   Tue 2 Jan 2018 - 17:05

Well, I guess I shouldn't read the German wiki on it...

It especially mentions it under the 917/10(-002) that even though these big wings were fitted, it still achieved 343 km/h.


I tried looking for more information on Jo's car specifically, but I can't find out more about it's supposed top speed.

Btw: https://www.rmsothebys.com/en/auctions/MO12/Monterey/lots/r197-1971-porsche-91710-spyder-can-am-racing-car/280789

Sotheby's states the car once weighted 733 kg, was that a misinformation as the car in-game weights 818 kg?


Not sure if I should like the fact that the owner from Monaco painted it back to white(and added some Gulf stickers, god damnit, why always Gulf!) and applied a rounder bodywork. The STP livery looks much nicer.

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Richard Wilks
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PostSubject: Re: 1971 Can-Am | Pre-season Testing [Dec 31st - Jan 4th]   Tue 2 Jan 2018 - 17:11

No, you shouldn't indeed.

In rfactor weight is with a driver and fluids onboard.

Edit: German wikipedia says that 343kph is for the 910 TC version.

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Timo Vermeersch
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PostSubject: Re: 1971 Can-Am | Pre-season Testing [Dec 31st - Jan 4th]   Tue 2 Jan 2018 - 18:21

I just did 52 laps around Elkhart Lake with the 917-10. Which is the 50 race laps plus a formation lap and an in lap.

I started with the fuel tank topped to the max with 265 liters. By the time I rolled back into the pit, 90 liters of fuel remained. Fuel should thus not be an issue in the Porsche, I guess.

On the penultimate lap, the left rear went yellow. The other tires were still green at the end of the stint. So tires should be ok also, even if, admitely, Elkhart Lake is rather easy on the tires.

David, if the replay can be of any use, I can PM it.

Timo

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PostSubject: Re: 1971 Can-Am | Pre-season Testing [Dec 31st - Jan 4th]   Tue 2 Jan 2018 - 18:55

Richard Wilks wrote:
No, you shouldn't indeed.

In rfactor weight is with a driver and fluids onboard.

Edit: German wikipedia says that 343kph is for the 910 TC version.

Ah, that makes sense!

As for the Wiki entry: It's confusing stuff then, since the entry of the top speed is mentioned in the parapgraph about '71 and before Jo Siffert's race results are mentioned...

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Michael Drechsler
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PostSubject: Re: 1971 Can-Am | Pre-season Testing [Dec 31st - Jan 4th]   Tue 2 Jan 2018 - 19:00

Timo Vermeersch wrote:
Alberto Ibaņez wrote:

Quote :
I guess it makes sense then that for example the BRM with a 7.6l engine(V8) uses slightly less fuel than the Porsche with a 5l engine(V12)?

At least my test gave me slightly worse fuel mileage.

Normally bigger engines will use more fuel, but in the end it's all a function of how much fuel is sucked into the cylinders per minute. A smaller engine that revs higher can in the end move through it a bigger volume of mixture, which means more fuel use. Also, engines that are squeezed to the limit might need extra fuel that acts as coolant, but which is effectively wasted and non completely burnt.

I also think the 917-10 had two turbochargers bolted onto the base 917-engine. Which does in general not reduce fuel consumption.

Timo

'71 917/10 was N/A. I wouldn't be surprised to learn it had a higher specific fuel consumption, given it revved 2000 1/min higher than the Chevys, but being about 130 hp short of the same, the Chevy should need more fuel.

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Petr Hlavac
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PostSubject: Re: 1971 Can-Am | Pre-season Testing [Dec 31st - Jan 4th]   Tue 2 Jan 2018 - 20:29

I understand that creating a detailed guide is probably way too time demanding. But would it be possible to release a list which would show how these cars perform? Just to divide those cars into groups, so that we could make a reasonable choice?

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Sky Willis
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PostSubject: Re: 1971 Can-Am | Pre-season Testing [Dec 31st - Jan 4th]   Tue 2 Jan 2018 - 20:50

the ones with wings have wings and the ones with more power have more power Laughing
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Jacob Fredriksson
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PostSubject: Re: 1971 Can-Am | Pre-season Testing [Dec 31st - Jan 4th]   Tue 2 Jan 2018 - 20:53

You can always take a look at qualifying times to get an idea how the cars are matched:

http://www.racingsportscars.com/photo/Watkins_Glen-1971-07-25c.html?sort=Qualifying

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Austin Ogonoski
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PostSubject: Re: 1971 Can-Am | Pre-season Testing [Dec 31st - Jan 4th]   Wed 3 Jan 2018 - 2:11

Alberto Ibaņez wrote:
Nice video, great tips Austin :top: Hope you run the season with us, this time there's no yellow flags to oblivion :hihi:


I really, really want to.

Current problem is that once the snow melts there's a chance I'd miss 3 or 4 races and HSO admins don't like that very much. Depends what they want to allow this season; could always hire a backup driver Smile
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David Jundt
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PostSubject: Re: 1971 Can-Am | Pre-season Testing [Dec 31st - Jan 4th]   Wed 3 Jan 2018 - 2:15

Quote :
For certain exceptional cases we can allow sharing a car between two drivers, i.e. they are free to arrange between themselves who drives at each event.

Sounds like this would kinda work in your case.

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Jason White
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PostSubject: Re: 1971 Can-Am | Pre-season Testing [Dec 31st - Jan 4th]   Wed 3 Jan 2018 - 3:49

Given how quickly Austin and Dustin vacated the CART series last year, I am not confident that a shared drive is worth exploring. Picking up one-offs during the year would make far more sense.

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Austin Ogonoski
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PostSubject: Re: 1971 Can-Am | Pre-season Testing [Dec 31st - Jan 4th]   Wed 3 Jan 2018 - 4:10

Jason White wrote:
Given how quickly Austin and Dustin vacated the CART series last year, I am not confident that a shared drive is worth exploring.  Picking up one-offs during the year would make far more sense.

Going to quote your own post from this thread:
http://historicsimracing.123.st/t3653-rule-change-for-road-courses

Jason White wrote:
All remaining road course races will not feature full course yellows. While this may seem like a positive development for some, the reality is that it is not. The admins are forced to take this step because the standard of driving on road courses in this series has dropped to a very low level. we, the admins, are disappointed that we now have to run historically inaccurate races to accommodate several drivers with bad habits -- drivers who keep on triggering excessive, needless yellows; ruining the fun for the others and forcing those in mainland Europe to stay up very late on a Sunday night.

We just figured it out quicker.
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PostSubject: Re: 1971 Can-Am | Pre-season Testing [Dec 31st - Jan 4th]   Wed 3 Jan 2018 - 4:14

I fail to see the relevance.

EDIT: you are conveniently forgetting the role your real racing schedule played in your availability last year.

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PostSubject: Re: 1971 Can-Am | Pre-season Testing [Dec 31st - Jan 4th]   Wed 3 Jan 2018 - 4:30

Jason White wrote:
I fail to see the relevance.

Bowing out of a league after two races last year had nothing to do with time commitment.

It was about the on-track product not being enjoyable and even the HSO admins recognized that by the midway point in a seperate forum thread. So I don't really understand how you could hold my level of commitment against me when the league openly admitted it was having problems creating a fun and engaging atmosphere because of all the wrecks/caution periods, and went so far as to changing rules that went against the nature of the site just so races could finish within a reasonable period of time.

With that out of the way, now's the time to try it again.
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PostSubject: Re: 1971 Can-Am | Pre-season Testing [Dec 31st - Jan 4th]   Wed 3 Jan 2018 - 4:35

So go find someone to share a car with and convince me you can reliably coordinate your efforts during the season.

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PostSubject: Re: 1971 Can-Am | Pre-season Testing [Dec 31st - Jan 4th]   Thu 4 Jan 2018 - 22:35

Things i've noticed today:

1. After struggling around practicing the fwd car for the ISO race, coming back to the canam car feels so much nicer Cool

2. I'm really enjoying edmonton after finding it utterly horrible just yesterday. scratch
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PostSubject: Re: 1971 Can-Am | Pre-season Testing [Dec 31st - Jan 4th]   Thu 4 Jan 2018 - 23:39

Sky Willis wrote:
Things i've noticed today:

1. After struggling around practicing the fwd car for the ISO race, coming back to the canam car feels so much nicer Cool

This is something I practiced during last seasons.. Cart cars were much more drivable after some Group5 cars in WEC!!

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PostSubject: Re: 1971 Can-Am | Pre-season Testing [Dec 31st - Jan 4th]   Fri 5 Jan 2018 - 0:09

I tried going the way of less weight for better handling(and less horse power) with some of the "slower" cars, but I started to struggle more to keep them on the island.

A bit surprised by that, thought I could get more out of the car with a bit less weight as a trade-off. But apparently I didn't get the handling quite right of them.

So in the end, went with picks that other drivers already had aswell.

Who knows, maybe I'll end up watching the first race from behind the fence :hihi:

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PostSubject: Re: 1971 Can-Am | Pre-season Testing [Dec 31st - Jan 4th]   Fri 5 Jan 2018 - 1:43

As some will have seen I've tested the cars but failed to get to grips with them, in terms of driving them consistently.
I could get one lap out that was within 2 seconds of the fastest but the driving style of these cars are so far away from what I'm able to drive like that I'll be driving the F1's in AM instead and you'll therefore find me, admins permitting, in the broadcast booth for the Can-Am races :drink:

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PostSubject: Re: 1971 Can-Am | Pre-season Testing [Dec 31st - Jan 4th]   Fri 5 Jan 2018 - 2:12

If I do end up as a spectator, I probably wouldn't mind joining that very same booth if I'd be allowed to when I have time Wink

I think there'd be people that watch for sure.

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PostSubject: Re: 1971 Can-Am | Pre-season Testing [Dec 31st - Jan 4th]   Fri 5 Jan 2018 - 2:35

Jonatan Acerclinth wrote:
As some will have seen I've tested the cars but failed to get to grips with them, in terms of driving them consistently.
I could get one lap out that was within 2 seconds of the fastest but the driving style of these cars are so far away from what I'm able to drive like that I'll be driving the F1's in AM instead and you'll therefore find me, admins permitting, in the broadcast booth for the Can-Am races :drink:


Thank you once again for providing the broadcast Jonatan :chinois:

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PostSubject: Re: 1971 Can-Am | Pre-season Testing [Dec 31st - Jan 4th]   Fri 5 Jan 2018 - 7:01

Jonatan Acerclinth wrote:
As some will have seen I've tested the cars but failed to get to grips with them, in terms of driving them consistently.
I could get one lap out that was within 2 seconds of the fastest but the driving style of these cars are so far away from what I'm able to drive like that I'll be driving the F1's in AM instead and you'll therefore find me, admins permitting, in the broadcast booth for the Can-Am races :drink:

I'll be running the series, but should the fates deal me out early, I would love to join you in the booth!
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