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Search found 6681 matches

by Kevin Johnson
Sat Jan 16, 2021 5:29 am
Forum: Offtopic Forum
Topic: Covid 19
Replies: 20
Views: 376

Re: Covid 19

I went in for a sinus infection . My first clue was I could not smell or taste. After my sinuses burning for a few days I am bored at home quarantined. This i believe you can get more than once. It was a year ago January I was sick with similar symptoms plus a dry cough and the shits. Then covid wa...
by Kevin Johnson
Thu Jan 14, 2021 9:06 am
Forum: Offtopic Forum
Topic: Covid 19
Replies: 20
Views: 376

Re: Covid 19

... On a side note, there not been any deaths this year from the common cold or the yearly flu. So we got that going for us!👍 Paul I am sorry to hear about your boss. On another forum I actually defended the CDC as still separating out influenza data. I went to the trouble of pulling up their graph...
by Kevin Johnson
Thu Jan 14, 2021 8:58 am
Forum: Offtopic Forum
Topic: Covid 19
Replies: 20
Views: 376

Re: Covid 19

... "THEY" are the real experts looking at the evidence. https://www.cdc.gov/coronavirus/2019-ncov/long-term-effects.html (as opposed to forum experts and conspiracy theorists) ... I would exercise caution in attributing omniscience to the CDC "experts." I speak from first-hand experience. Several ...
by Kevin Johnson
Fri Jan 08, 2021 7:18 am
Forum: Vintage/Classic/Historical Engine Tech
Topic: Lead used to lube valve stems?
Replies: 16
Views: 820

Re: Lead used to lube valve stems?

https://ntrs.nasa.gov/api/citations/199 ... 093400.pdf

THE EFFECTS OF AN INCREASE IN THE CONCENTRATION OF ETHYLENE
DIBROMIDE IN A LEADED FUEL ON LEAD DEPOSITION, CORROSION
OF EXHAUST VALVES, AND KNOCK-LIMITED POWER
By B. A. Mulcahy and M. A. Zipkin
by Kevin Johnson
Mon Jan 04, 2021 10:19 am
Forum: Engine Tech
Topic: rolling road dyno ventilation question
Replies: 16
Views: 521

Re: rolling road dyno ventilation question

... The brake however had a serious problem in the sense that one side of the attachment of the brake to the chassis broke off. All chunks were there and I basically disassembled the coils, welded everything back up and meggered for isolation. All fine now. Now I only need to rebuild the axle with ...
by Kevin Johnson
Sun Jan 03, 2021 6:30 am
Forum: Engine Tech
Topic: Miata Koensegg freevalve build
Replies: 4
Views: 481

Re: Miata Koensegg freevalve build

Yes, I personally like the Fiat airvalve system better. However they don't offer it anymore. No explanation why though. https://patentimages.storage.googleapis.com/c3/bc/31/73706e26756756/US8910599.pdf The above is a patent to help correct problems with the MultiAir system. If you read the patent y...
by Kevin Johnson
Sat Jan 02, 2021 4:04 pm
Forum: Engine Tech
Topic: rolling road dyno ventilation question
Replies: 16
Views: 521

Re: rolling road dyno ventilation question

Don't forget to get some advice about suppressing the sound so you do not get complaints. I know some people direct the sound straight up into the air but depending on the weather conditions, sound waves can reflect downwards and be heard some miles/kilometres away. That happened ~40 years ago when ...
by Kevin Johnson
Tue Dec 29, 2020 6:20 am
Forum: Offtopic Forum
Topic: Good book
Replies: 5
Views: 226

Re: Good book

I was investigating possible/disputed quotes of Stalin which led me to look at Lenin. I was (not so) surprised to learn that there is disagreement within academia about presumably very specific events and meetings in Lenin's life.

Cheery topic.
by Kevin Johnson
Mon Dec 28, 2020 10:38 am
Forum: General Tech
Topic: Push to pass legislation to save our race cars this session
Replies: 9
Views: 477

Re: Push to pass legislation to save our race cars this session

If we want to save racing, we need to do every thing in our power to keep the Democrats from winning the 2 Senate seats in GA. If you live in GA, it's not enough to just vote, you need to get everyone you know to vote for the 2 Republicans. Drive your neighbors to the polls. If they're allowing vot...
by Kevin Johnson
Mon Dec 28, 2020 10:31 am
Forum: Engine Tech
Topic: Engine development the modern way
Replies: 7
Views: 836

Re: Engine development the modern way

hoffman900 wrote: Sun Dec 27, 2020 8:47 pm ...
Also interesting, I never heard of this company: http://capricornauto.co.uk/pistons
https://www.materialsforengineering.co. ... -ltd/3801/
by Kevin Johnson
Sun Dec 27, 2020 3:16 pm
Forum: Chassis / Suspension / Body
Topic: Are vented rear discs 'worth it' on a FWD track car?
Replies: 19
Views: 381

Re: Are vented rear discs 'worth it' on a FWD track car?

Probably the best reason to go to rear discs on a FWD car is it has become very difficult to find good rear brake shoe lining material and anyone to reline the shoes. Since asbestos is too hazardous to use, there's been little thought or engineering given to drum brake shoe linings. I work with Stu...
by Kevin Johnson
Sun Dec 27, 2020 7:59 am
Forum: Engine Tech
Topic: safety wire
Replies: 17
Views: 653

Re: safety wire

Physical causes Since the momentum transfer is caused by free motion of gas molecules between collisions, increasing thermal agitation of the molecules results in a larger viscosity. Hence, gaseous viscosity increases with temperature. The boundary layer at the pipe wall would become more viscous a...
by Kevin Johnson
Sun Dec 27, 2020 7:36 am
Forum: Chassis / Suspension / Body
Topic: Are vented rear discs 'worth it' on a FWD track car?
Replies: 19
Views: 381

Re: Are vented rear discs 'worth it' on a FWD track car?

I read a little further to discern why Renault -- which was very active in racing -- would discontinue using the solid rear disk setup in the R17 (itself a variant of the R12). It looks like they decided not to pursue racing it any further: Renault abandoned plans to contest the World Rally Champion...