Borroughs gauge for sale.

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mkelite
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Model: Elite S2.2
Colour: Lotus Yellow
Year: 1982

Re: Borroughs gauge for sale.

Post by mkelite »

Thank you very much guys for your supporting words. That is genuinely appreciated.
Everyone has problems relevant to them. It is just a tough time for many I guess. Hope to meet you all one day when my Elite is roadworthy. Thank you again. Best regards to all. Dave. :D

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MetBlue
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Model: Elite 74 & Excel 92 (SEish))
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Year: 1974
Location: Northampton

Re: Borroughs gauge for sale.

Post by MetBlue »

Sorry to hear your wow's. Keep at it and something will turn up.

If you recall we spoke mid last year and were going to meet up, then we hit full restrictions again - You're pretty close to me.
A nice run out. When we are allowed, I'll arrange to drop by. Would still love to see your Elite.

Tony
What goes together.... Must come apart.

mkelite
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Posts: 520
Joined: Mon Oct 05, 2009 18:51
Model: Elite S2.2
Colour: Lotus Yellow
Year: 1982

Re: Borroughs gauge for sale.

Post by mkelite »

Hi Tony

Hope you are very well. Yes I think lockdown is about to ease so would be great to meet you soon. All the best til then.

Dave.

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chrisw2811
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Re: Borroughs gauge for sale.

Post by chrisw2811 »

Good luck Dave. Hopefully the UK will turn a corner soon and your fortitude will be rewarded.
Best regards, Chris
'85 Excel SE, '84 FJ1100, '12 Passat TDI Estate, '12 Golf TSi, '04 Picanto, '10 Gary Fisher Wahoo 1964 Raleigh Runabout 1984 Honda XL200 1979 Honda NC50 , '02 Montesa 315R

Well, if I was right all the time I'd get to be predictable!

Pete Boole
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Re: Borroughs gauge for sale.

Post by Pete Boole »

Gauge arrived safely yesterday Dave. Thanks very much!

Pete

mkelite
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Posts: 520
Joined: Mon Oct 05, 2009 18:51
Model: Elite S2.2
Colour: Lotus Yellow
Year: 1982

Re: Borroughs gauge for sale.

Post by mkelite »

hi Pete

Many thanks again.

Best regards to all.

Maybe we can have some meets later this year then ! :D

Dave

Esprit2
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Re: Borroughs gauge for sale.

Post by Esprit2 »

AndyC wrote:
Fri Feb 12, 2021 17:23
Actually, thinking about it, for the mechanical gauge they are both the same setting, it's different settings if using the resonant frequency method.
Sorry, I'm late to this thread...

Yes, when using a Borroughs gauge, use the same '95' tension for both the trapezoidal and HTD round tooth belts. One size fits all the OEM black belts (the modern Gates Racing Blue belts use a lower tension - 82-85).

The HTD belt's taller tooth/ deeper engagement requires less tension than the trapezoidal belt. The Borroughs gauge is 'thickness sensitive', and the HTD belt is thicker than the trapezoidal. Using the same '95' tension with the HTD belt results in a 'real' strand tension that is something lower than 95, closer to 90. I'm not sure what the ideal HTD tension would have been, but Lotus felt that whatever '95' Borroughs produced was close enough. Being able to carry forward the same Borroughs gauge and tension spec for all OEM black belts was was convenient both in terms of no new tool required, and no added confusion over which tool & tension to use.

The Lotus Burroughs gauge was calibrated using a trapezoidal belt back in the day, and it was that gauge & calibration that was carried forward. If your engine has an HTD belt, and you ever send your Borroughs gauge in to be re-calibrated, then send along a length of trapezoidal belt on which to calibrate it. If you calibrate it to 95 with a HTD belt (even if that's what is on your engine), then the gauge will read higher than Lotus spec by about ~5.

Both the original Borroughs, and the later cantilever Boroughs were calibrated on trapezoidal tooth belts.

Regards,
Tim Engel

Pete Boole
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Re: Borroughs gauge for sale.

Post by Pete Boole »

Thanks for that Tim - very informative. I'll bear this in mind when tensioning my belt.

Pete

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