MFH 911 Carrera RSR Turbo
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Re: MFH 911 Carrera RSR Turbo
Looks very nice !!! ...is it possible that the one lang belt is mounted the from way with the teeth pointing outwards !?
Did you sandblast or used microballons on the engine ?? ...I really like the texture.
Did you sandblast or used microballons on the engine ?? ...I really like the texture.
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Re: MFH 911 Carrera RSR Turbo
Hi Daniel, the belt with the teeth pointing outwards is mounted the right way, at least according to reference pictures I've been using.
The texture can be achieved w/o sandblasting or microballons. I just prime the part with Alclad Grey Primer and then spray a very thin coat of Alclad Steel. The grey primer should still shine through the "steel" layer. That's all
The texture can be achieved w/o sandblasting or microballons. I just prime the part with Alclad Grey Primer and then spray a very thin coat of Alclad Steel. The grey primer should still shine through the "steel" layer. That's all
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Re: MFH 911 Carrera RSR Turbo
I really appreciate the view on how these little “jewels” look. But to see the workmanship and the amount of work to actually create the underlying detail, is stunning. Those of you that do this are a special incentive to me.
Happy Holidays to all of you!
Happy Holidays to all of you!
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Re: MFH 911 Carrera RSR Turbo
According to the refs, Uli is correct as I found another picture of the same setup with the tooths on the outside
https://www.maxted-page.com/expertise/recently-completed-project/1974-r13-martini-racing-porsche-2-1-rsr-turbo
Link to the whole page: https://www.maxted-page.com/expertise/r ... -rsr-turbo
And here's another car from that era with the same kind of setup: https://www.fiskens.com/cars-for-sale/P ... /11662.htm
It seems odd to me, knowing how these things usually work. Unless the belt is toothed on both sides, I don't see how it would have a reliable
connection to the pulleys it is running on. But hey.. Porsche must have thought about that, as they usually know what they're doing
https://www.maxted-page.com/expertise/recently-completed-project/1974-r13-martini-racing-porsche-2-1-rsr-turbo
Link to the whole page: https://www.maxted-page.com/expertise/r ... -rsr-turbo
And here's another car from that era with the same kind of setup: https://www.fiskens.com/cars-for-sale/P ... /11662.htm
It seems odd to me, knowing how these things usually work. Unless the belt is toothed on both sides, I don't see how it would have a reliable
connection to the pulleys it is running on. But hey.. Porsche must have thought about that, as they usually know what they're doing
Cheers,
Roman
Roman
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Re: MFH 911 Carrera RSR Turbo
wow...great images. How cool a model with all those defects in the paint would look !!
Re: MFH 911 Carrera RSR Turbo
I don't think the belts were meant to have 'teeth'. The belt would probably rotate around the pulley easier because the 'cuts' along the outside of the belt would allow it to flex easier when bent.sky1911 wrote:According to the refs, Uli is correct as I found another picture of the same setup with the tooths on the outside
https://www.maxted-page.com/expertise/recently-completed-project/1974-r13-martini-racing-porsche-2-1-rsr-turbo
Link to the whole page: https://www.maxted-page.com/expertise/r ... -rsr-turbo
And here's another car from that era with the same kind of setup: https://www.fiskens.com/cars-for-sale/P ... /11662.htm
It seems odd to me, knowing how these things usually work. Unless the belt is toothed on both sides, I don't see how it would have a reliable
connection to the pulleys it is running on. But hey.. Porsche must have thought about that, as they usually know what they're doing
Re: MFH 911 Carrera RSR Turbo
But then the belt could be thinner overall, I think? There is no extra strength in the thicker parts.notime4me wrote:I don't think the belts were meant to have 'teeth'. The belt would probably rotate around the pulley easier because the 'cuts' along the outside of the belt would allow it to flex easier when bent.sky1911 wrote:According to the refs, Uli is correct as I found another picture of the same setup with the tooths on the outside
https://www.maxted-page.com/expertise/recently-completed-project/1974-r13-martini-racing-porsche-2-1-rsr-turbo
Link to the whole page: https://www.maxted-page.com/expertise/r ... -rsr-turbo
And here's another car from that era with the same kind of setup: https://www.fiskens.com/cars-for-sale/P ... /11662.htm
It seems odd to me, knowing how these things usually work. Unless the belt is toothed on both sides, I don't see how it would have a reliable
connection to the pulleys it is running on. But hey.. Porsche must have thought about that, as they usually know what they're doing
Re: MFH 911 Carrera RSR Turbo
The picture of the belt shows that it has a thicker rib on either edge so the belt is actually like a ladder. The gaps in the middle that make it look like teeth can make the belt lighter and able to bend easier.Moskie wrote:But then the belt could be thinner overall, I think? There is no extra strength in the thicker parts.notime4me wrote:I don't think the belts were meant to have 'teeth'. The belt would probably rotate around the pulley easier because the 'cuts' along the outside of the belt would allow it to flex easier when bent.sky1911 wrote:According to the refs, Uli is correct as I found another picture of the same setup with the tooths on the outside
https://www.maxted-page.com/expertise/recently-completed-project/1974-r13-martini-racing-porsche-2-1-rsr-turbo
Link to the whole page: https://www.maxted-page.com/expertise/r ... -rsr-turbo
And here's another car from that era with the same kind of setup: https://www.fiskens.com/cars-for-sale/P ... /11662.htm
It seems odd to me, knowing how these things usually work. Unless the belt is toothed on both sides, I don't see how it would have a reliable
connection to the pulleys it is running on. But hey.. Porsche must have thought about that, as they usually know what they're doing
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Re: MFH 911 Carrera RSR Turbo
interesting discussion on the belt and thanks for sharing your thoughts. Porsche was always striving for light weight so notime4me's view sounds logical to me. There are other Porsche engines with the "teeth" ouside for driving the alternator. E.g. on the type 935/76 engine of the 956. Next time when I meet with one of my Porsche contacts, I'll ask/validate the reasoning