peak HP
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Drifting
Joined: Sep 2001
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From: Ocean County NJ
peak HP temp
I have heard that peak HP is made at 195 degrees F......is this so??? And if so.....why put in a low temp stat????? Seems as though just lowering your fan temps to kick on at 196 would do the job!
:confused:
[Modified by skidmarc, 10:24 AM 9/11/2003]
:confused:
[Modified by skidmarc, 10:24 AM 9/11/2003]
Racer
Joined: Sep 2002
Posts: 483
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From: Austin Tx
Re: peak HP temp (skidmarc)
I have heard that peak HP is made at 195 degrees F......is this so??? And if so.....why put in a low temp stat????? Seems as though just lowering your fan temps to kick on at 196 would do the job!
[Modified by skidmarc, 10:24 AM 9/11/2003]
[Modified by skidmarc, 10:24 AM 9/11/2003]
HP continues to rise with rising temperature until: A) the oil film breaks down and friction (and wear) increases, B) the heat of the engine heats the incomming air and reduces its density and thereby reduces power.
Safety Car
Joined: May 2000
Posts: 4,808
Likes: 344
From: Albuquerque NM
Re: peak HP temp (Mitch Alsup)
I have heard that peak HP is made at 195 degrees F......is this so??? And if so.....why put in a low temp stat????? Seems as though just lowering your fan temps to kick on at 196 would do the job!
[Modified by skidmarc, 10:24 AM 9/11/2003]
Peak HP is made at high engine temperatures because the oil thins out and is easier to pump around the engine, the reduction in pumping forces is thereby available to the drive line. We are talking about trifflings of HP here. The difference between 180 d HP and 195 d HP might be 2-3 HP WELL WITHIN the error bands of a typical rolling wheel dyno.
HP continues to rise with rising temperature until: A) the oil film breaks down and friction (and wear) increases, B) the heat of the engine heats the incomming air and reduces its density and thereby reduces power.
[Modified by skidmarc, 10:24 AM 9/11/2003]
Peak HP is made at high engine temperatures because the oil thins out and is easier to pump around the engine, the reduction in pumping forces is thereby available to the drive line. We are talking about trifflings of HP here. The difference between 180 d HP and 195 d HP might be 2-3 HP WELL WITHIN the error bands of a typical rolling wheel dyno.
HP continues to rise with rising temperature until: A) the oil film breaks down and friction (and wear) increases, B) the heat of the engine heats the incomming air and reduces its density and thereby reduces power.
Racer
Joined: Sep 2002
Posts: 483
Likes: 0
From: Austin Tx
Re: peak HP temp (6Speeder)
I have heard that peak HP is made at 195 degrees F......is this so??? And if so.....why put in a low temp stat????? Seems as though just lowering your fan temps to kick on at 196 would do the job!
[Modified by skidmarc, 10:24 AM 9/11/2003]
Peak HP is made at high engine temperatures because the oil thins out and is easier to pump around the engine, the reduction in pumping forces is thereby available to the drive line. We are talking about trifflings of HP here. The difference between 180 d HP and 195 d HP might be 2-3 HP WELL WITHIN the error bands of a typical rolling wheel dyno.
HP continues to rise with rising temperature until: A) the oil film breaks down and friction (and wear) increases, B) the heat of the engine heats the incomming air and reduces its density and thereby reduces power.
That is true IF you don't have any detonation or knock. Lower coolant temps quench heat away from the heads and reduce the temps of the "hot spots" which cause detonation. If you are getting any KR at stock temps try running it cooler and watch the KR reduce or go away, then your HP will go up. I'm gettineg pretty good power out of a "little" 218 duration cam with 11.4:1 CR, and 31 degrees of timing under load. I can get away with this because I keep the temp down, 175 to 185 in summer traffic. :chevy
[Modified by skidmarc, 10:24 AM 9/11/2003]
Peak HP is made at high engine temperatures because the oil thins out and is easier to pump around the engine, the reduction in pumping forces is thereby available to the drive line. We are talking about trifflings of HP here. The difference between 180 d HP and 195 d HP might be 2-3 HP WELL WITHIN the error bands of a typical rolling wheel dyno.
HP continues to rise with rising temperature until: A) the oil film breaks down and friction (and wear) increases, B) the heat of the engine heats the incomming air and reduces its density and thereby reduces power.
That is true IF you don't have any detonation or knock. Lower coolant temps quench heat away from the heads and reduce the temps of the "hot spots" which cause detonation. If you are getting any KR at stock temps try running it cooler and watch the KR reduce or go away, then your HP will go up. I'm gettineg pretty good power out of a "little" 218 duration cam with 11.4:1 CR, and 31 degrees of timing under load. I can get away with this because I keep the temp down, 175 to 185 in summer traffic. :chevy
