Search This Blog
Saturday, April 24, 2010
K9, Dog Allegy
Pollen count was extremely high in the past month, I didn't feel a thing because I am smarter now. To my dislike, I decided to take allergy medication regardless of having symptoms or not .
Dog suffers inhalant allergies too. To my surprise, the symptoms are different than the human kind. Dog chews on feet, scratches everywhere, instead of sneezing, or having running nose.
Vet tried to treat allergy symptoms as inhalant, and food/flea bite allergy.
1. Bath with right kind of shampoo - or use wet towel rub daily to remove pollens.
2. Flea control medication - I don't see flea, why take the medication? The vet checked sign of flea around feet, flanks, groin and armpits.
3. Corticosteroids - It reduce itching by reducing inflammation - bad for the dog. I was warned the side effects - increased thirst and appetite. Long term use - can cause diabetes, seizures.
4. Fish oil - (Omega-3, Omega-6 Fatty Acids) - improving the dogs natural anti-inflammatory defense.
# #
The standard treatment Corticosteroids is to take a high dosage for 4 days, and then cut back 1/2 for 4 days, and 1/2 the amount for the next 4 days etc. I don't think the Corticosteroids should be used to contain the symptoms because its side affects. But rather it shall be only used to suppress, keep the chewing and scratching to acceptable level.
I gave my dog a standard treatment as prescribed, and began to cut back on the medication as soon as the dog stops scratching and chewing feet.
# # #
The follow up visit to vet office - 2 weeks after the "all-out treatment" -
The Corticosteroids treatment is replaced with antihistamines treatment.
5 Antihistamines - 25mg-50mg of Benadryl. (Tavist, Chlortrimeton, Seldane, Atarax). The drawback is sedation. As turnout Benadryl is commonly prescribed to dog to manage anxiety problems. I wonder whether Beneadryl can be used to control overly hyperactive dogs..
Wednesday, April 21, 2010
RTS Performance Parameters, Engine, Rear End Gearing & Tires
Converting a transit bus to highway use is an interesting topic. Overcoming the engine RPM and short gearing are the first task at hand.
Over weight is a killer to anything that moves. I had to assume that my bus has taken weight reduction opportunities. That leave me with fewer parameters to evaluate.
1. Tires.
The original bus is equipped with 11R22.5 tires 8" rim width. To increase the 55mph to higher speed 65mph or 70, 75mph, some has suggested replacing them with 24.5 dia rim.
* Used steel rim 24.5" can be had for a little as $25-$40 each Maybe there is positive cash flow if the aluminum wheels are traded for cheap steel wheels.
* 11R22.5 turns in 505 per miles, where as 11R24.5 turns in about 485 per miles. Upgrading the wheels, at the same engine RPM and rear ends gears will increase speed by 4%, assuming there is adequate HP to push. 55mph 11R22.5 = 57mph 11R24.5
The standard rear end gear of 5.38 is for urban driving - seeking quick acceleration, but it takes a hit for prolong highway speed driving.
The transit gearing, 5.38 typically turns 2,000 - 2,100 rpm at 55mph - it quickly shorten the engine life.
Many suburban RTS have 4.56. It turns 1,800 rpm at 55mph. If needed, it can be pushed to go 65mph.
One of the popular options is to use 4.10. It turns at 1,900 rpm at 65mph, or 1,600 rpm @ 55mph. Using 4.10 rear end - which runs about $3,000 a set, posses a new set of problems,
* How much power does it need?
* Upgrading the fuel injectors for more HP, to balance out tall gearing, is there a fuel saving after all?
The standard 6v92T engine produces 270HP to 330HP. Most transit bus is equipped with fuel injectors producing 270HP. The engine block, various fuel injectors all reached the "270HP" at around 1,500 rpm.
* So, for the transit buses "270HP", there is no need to rev engine over 1500 rpm? If tall gears are used, drivers need to rev and keep the engine over 1500 (say 1,900 rpm) to get that 320HP needed to push the bus to speed?
# # # #
The next step is to figure out how much power do I need to push this bus at 65mph, since I will be likely to a lot of highway driving.. Will I have enough HP to climb a 6% grade?
Subscribe to:
Posts (Atom)