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[Fot] 89MM piston question

Subject: [Fot] 89MM piston question
From: billdentin at aol.com (Bill Dentinger)
Date: Wed, 5 Sep 2018 07:25:49 -0700
References: <CAMJWJcHsmkMuWwvt1bs3Lax-kTVTkADpdNrFiWUahJDa2r3zsg@mail.gmail.com> <1659c8fa8c2-1ebc-238b@webjas-vaa013.srv.aolmail.net> <Wu2u1y01V15GZSQ01u2w82> <bc2fdf3d-c6f7-7b03-d6fd-cc869e1ac34b@pobox.com> <A5AE8FD0-527C-4529-9956-434B16E0B7CB@ponostyle.com>
Yeah! It sounds completely different in Classical Latin.

Bill Dentinger

Sent from my iPhone

> On Sep 4, 2018, at 2:07 PM, Bill via Fot <fot at autox.team.net> wrote:
> 
> I?m being a bit facetious, I understand what people mean (sort of)  but I?ve 
> heard ?Horsepower wins sales, torque wins races.? and the equivalent spoken 
> or written sagely, with solemn nods all around, too many times not to 
> comment. One is a functional equivalent of the other, both in a mathematical 
> and practical sense. The relationship is linear. Torque is force. Horsepower 
> includes a circular distance component to express work. 
> 
> As you say, the numbers for the power and torque curves should equate at 
> every point (adjusted by the function). The fact that they often don?t is 
> ridiculous?horsepower measured by a dyno is calculated from torque and RPM, 
> not directly measured. The shorthand bullshit detector for dyno curves 
> expressed in Imperial units of ft-lbs and horsepower is to see if the curves 
> cross at 5252 RPM. Many don?t, including those published in car magazines. 
> 
> Sheesh. 
> 
> 
>> On Sep 4, 2018, at 9:21 AM, Larry Young via Fot <fot at autox.team.net> 
>> wrote:
>> 
>> P = T*R/5252 
>> When people talk about a torquey engine, they usually mean it makes its 
>> power a low revs. 
>> 
>> I once ran an engine on two different rolling road dynos (a Dynojet and a 
>> Mustang Dyno. The guys at the dyno shop said the second one would give less 
>> hp because they used a brake in their setup. I said, "you didn't calibrate 
>> for that"? They backpedaled and gave me a line     of BS. Then the power and 
>> torque curves they produced did not agree with the equation. To get an 
>> explanation, I worked my way up the chain and eventually talked to the dyno 
>> companies head "technical" guy. He said he thought it must be the 
>> calibration! I said, "it is basic physics, like saying F = ma". Since then, 
>> I have never trusted dyno numbers. Good for comparative tuning runs only and 
>> of course, bench racing.
>>  - Larry
>> 
>>> On 9/2/2018 10:46 PM, Bill via Fot wrote:
>>> It always puzzles me when people say that. Horsepower is torque times RPM 
>>> (and a conversion factor). Torque is horsepower/RPM. So how can one count 
>>> more than the other? 
>>> 
>>>> On Sep 2, 2018, at 4:13 PM, Mordy Dunst via Fot <fot at autox.team.net> 
>>>> wrote:
>>>> 
>>>> Its the torque that counts.  So, I suspect the motor enhancements took the 
>>>> benefit of the tractor stroke.  If the motor is  able  to produce  that 
>>>> power at 6k rpm with shift at 6500.    
>>>> I shift at @ 6200 - my motor produces  max power @5800 on the dyno. I use 
>>>> a kastner designed cam for which  I have the masters. 
>>>> 
>>>>  
>>>> 
>>>> MDunst Headgasket.com 626.358.1616 
>>>> Fax 626.628.3777 
>>>> Triple R Munitions, Inc 626.201.9471 
>>>> T FFL 6,7 SOT 2
>>>> 
>>>> On Sunday, September 2, 2018, John Styduhar via Fot <fot at 
>>>> autox.team.net> wrote:
>>>> 
>>>> What kind of modifications were done to the engine to extract over 200 HP 
>>>> from a tractor engine?  Nitrous shot.
>>>> 
>>>> 
>>>>> On Sat, Sep 1, 2018 at 3:05 PM Thomas Boyd <tom at trenterprises.com> 
>>>>> wrote:
>>>>> All of our FIA race cars are running legal 87mm engines.
>>>>> Just rolling roaded the latest SLR build at well north of 200bhp
>>>>> 
>>>>> Thomas Boyd
>>>>> Director
>>>>> TR Enterprises
>>>>> 01623 793807 (ext 302)
>>>>> www.trenterprises.com
>>>>> 
>>>>> 
>>>>> On 1 Sep 2018, at 17:02, John Styduhar via Fot <fot at autox.team.net> 
>>>>> wrote:
>>>>> 
>>>>> If you really had serious compliance with most group's rules, I would 
>>>>> guess half the TR cars would not pass muster.  Let's have fun together.   
>>>>> 
>>>>> 
>>>>>> On Sat, Sep 1, 2018 at 9:40 AM Terry Stetler via Fot <fot at 
>>>>>> autox.team.net> wrote:
>>>>>> Indeed there are Glen.
>>>>>> 
>>>>>>  
>>>>>> Sent from Mail for Windows 10
>>>>>> 
>>>>>>  
>>>>>>                                        
>>>>>> From: Fot <fot-bounces at autox.team.net> on behalf of fubog1 via Fot 
>>>>>> <fot at autox.team.net>
>>>>>> Sent: Saturday, September 1, 2018 7:34:26 AM
>>>>>> To: rkramer56 at gmail.com
>>>>>> Cc: fot at autox.team.net
>>>>>> Subject: Re: [Fot] 89MM piston question
>>>>>>  
>>>>>> everybody else seems to be using 89.
>>>>>> HaHa not everybody, rules say 87mm, there are still a few guys running 
>>>>>> them (and winning)...
>>>>>> Glen 
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> -----Original Message-----
>>>>>> From: Bob Kramer via Fot <fot at autox.team.net>
>>>>>> To: van.mulders.marcel <van.mulders.marcel at telenet.be>
>>>>>> Cc: fot <fot at autox.team.net>
>>>>>> Sent: Fri, Aug 31, 2018 11:26 pm
>>>>>> Subject: Re: [Fot] 89MM piston question
>>>>>> 
>>>>>> I've always used 87 MM due to the rules but everybody else seems to be 
>>>>>> using 89. The procedures are the same so It'll be the same. I blew a 
>>>>>> head gasket last time out, compression into the cooling system and blew 
>>>>>> off the bottom hose. I guess it wasn't tight enough, and scuffed two 
>>>>>> pistons before I could shut it down. 
>>>>>> 
>>>>>> Bob Kramer
>>>>>> 
>>>>>> On Fri, Aug 31, 2018 at 12:43 PM, <van.mulders.marcel at telenet.be> 
>>>>>> wrote:
>>>>>> Bob,
>>>>>> It is definitely necessary to make that modification to the liners. The 
>>>>>> relieve should correspond to the shape of the combustion chambers : 
>>>>>> about 4 mm wide on a 89mm engine.
>>>>>> Marcel
>>>>>> 
>>>>>> Van: "fot" <fot at autox.team.net>
>>>>>> Cc: "fot" <fot at autox.team.net>
>>>>>> Verzonden: Donderdag 30 augustus 2018 00:05:43
>>>>>> Onderwerp: [Fot] 89MM piston question
>>>>>> 
>>>>>> Do the guys running the 89MM pistons and liners need to relieve the 
>>>>>> liners to clear the intake valve, or does the extra MM make the 
>>>>>> difference?
>>>>>> 
>>>>>> Bob Kramer
>>>>>> 
>>>>>> On Tue, 
>>>>>> 
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>>>>>> 
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>>>>>> 
>>>>>> _______________________________________________
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>>>>>> 
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>>>>>> 
>>>>> 
>>>>> _______________________________________________
>>>>> fot at autox.team.net
>>>>> 
>>>>> http://www.fot-racing.com
>>>>> 
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>>>>> trenterprises.com
>>>>> 
>>>>> 
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>>>> 
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>>> 
>>> 
>>> 
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>> 
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>> 
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>> 
> 
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> 
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