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Re: what gains did you find with dry sump?
[Re: 572_dup2]
#1708634
12/11/14 06:39 PM
12/11/14 06:39 PM
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Joined: Sep 2003
Posts: 1,049
San Jose Ca.
boatracer572
super stock
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super stock
Joined: Sep 2003
Posts: 1,049
San Jose Ca.
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Quote:
Find any power or see any e.t difference? If you were using vacuum pump did you remove it?
I've been using a drysump system for better than 15 years...can't say I saw any et. Differance at all, but the biggest single thing that sold me was having oil psi. In the shut down area... Other advantages as talked about above we're easy priming of the oil system, cooler oil with volume , oil with less air intrained in it... As far as taking the vacuum pump off... My motor pulls 17" of vacuum with both the oil pump and vacuum pump... Take the belt off the vacuum pump the the motor drops to 8" of vacuum and looses 25 hp.
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Re: what gains did you find with dry sump?
[Re: boatracer572]
#1708635
12/11/14 11:20 PM
12/11/14 11:20 PM
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Joined: Mar 2012
Posts: 220
Jerry Kathe
enthusiast
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enthusiast
Joined: Mar 2012
Posts: 220
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Quote:
Quote:
Find any power or see any e.t difference? If you were using vacuum pump did you remove it?
I've been using a drysump system for better than 15 years...can't say I saw any et. Differance at all, but the biggest single thing that sold me was having oil psi. In the shut down area... Other advantages as talked about above we're easy priming of the oil system, cooler oil with volume , oil with less air intrained in it... As far as taking the vacuum pump off... My motor pulls 17" of vacuum with
both the oil pump and vacuum pump... Take the belt off the vacuum pump the the motor drops to 8" of vacuum
and looses 25 hp.
If 9 lbs of vacuum is costing you 25hp....I believe I would take it back to your builder and tell him to fix it.
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Re: what gains did you find with dry sump?
[Re: Jerry Kathe]
#1708636
12/11/14 11:48 PM
12/11/14 11:48 PM
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Joined: Sep 2003
Posts: 1,049
San Jose Ca.
boatracer572
super stock
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super stock
Joined: Sep 2003
Posts: 1,049
San Jose Ca.
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Quote:
Quote:
Quote:
Find any power or see any e.t difference? If you were using vacuum pump did you remove it?
I've been using a drysump system for better than 15 years...can't say I saw any et. Differance at all, but the biggest single thing that sold me was having oil psi. In the shut down area... Other advantages as talked about above we're easy priming of the oil system, cooler oil with volume , oil with less air intrained in it... As far as taking the vacuum pump off... My motor pulls 17" of vacuum with
both the oil pump and vacuum pump... Take the belt off the vacuum pump the the motor drops to 8" of vacuum
and looses 25 hp.
If 9 lbs of vacuum is costing you 25hp....I believe I would take it back to your builder and tell him to fix it.
Dont' know much about a real race engine do you?
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Re: what gains did you find with dry sump?
[Re: Jerry Kathe]
#1708643
12/12/14 10:33 AM
12/12/14 10:33 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
That was a suggestion not an insult. A few on this board clearly need to chill.
Simple as this....if you have efficient ring seal - even with the most exotic of ring packages....you will be hard pressed to gain 25hp fro the system in total. If you loose 25 on 9lb....you didnt get it done......dont bother trying to convince me otherwise.
Maybe its not me that doesn't understand "real racing engines"
Just for your info... vac is measured in inches of
HG not pounds
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Re: what gains did you find with dry sump?
[Re: MR_P_BODY]
#1708644
12/12/14 11:28 AM
12/12/14 11:28 AM
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Joined: Mar 2012
Posts: 220
Jerry Kathe
enthusiast
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enthusiast
Joined: Mar 2012
Posts: 220
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Quote:
Quote:
That was a suggestion not an insult. A few on this board clearly need to chill.
Simple as this....if you have efficient ring seal - even with the most exotic of ring packages....you will be hard pressed to gain 25hp fro the system in total. If you loose 25 on 9lb....you didnt get it done......dont bother trying to convince me otherwise.
O
Maybe its not me that doesn't understand "real racing
engines"
Just for your info... vac is measured in inches of
HG not pounds
Good gawd.....you know what I meant.....you boys split more hair than a barber...
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Re: what gains did you find with dry sump?
[Re: Jerry Kathe]
#1708645
12/12/14 11:33 AM
12/12/14 11:33 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Quote:
Quote:
That was a suggestion not an insult. A few on this board clearly need to chill.
Simple as this....if you have efficient ring seal - even with the most exotic of ring packages....you will be hard pressed to gain 25hp fro the system in total. If you loose 25 on 9lb....you didnt get it done......dont bother trying to convince me otherwise.
O
Maybe its not me that doesn't understand "real racing
engines"
Just for your info... vac is measured in inches of
HG not pounds
Good gawd.....you know what I meant.....you boys split more hair than a barber...
I'm just trying to tell you what is proper....most
people would just says thanks for the info... I guess
you dont
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Re: what gains did you find with dry sump?
[Re: Jerry Kathe]
#1708647
12/12/14 12:28 PM
12/12/14 12:28 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Just for your info... vac is measured in inches of
HG not pounds
Good gawd.....you know what I meant.....you boys split more hair than a barber...
I'm just trying to tell you what is proper....most
people would just says thanks for the info... I guess
you dont
If "proper" is so important. ...why didnt you use the modern scale for gauging vacuum.....kPa.....and your welcome.
I guess your gonna ALWAYS BE RIGHT... no matter what
anyone says... keep calling it POUNDS of vac.. if
your happy then thats all that counts.... by the
way.. my gauges read both... but in the USA we tend
to use inch of HG... maybe you call it pounds of KPA..
I tried to help you out with just a little info and
thats all.... do what you want
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Re: what gains did you find with dry sump?
[Re: Jerry Kathe]
#1708648
12/12/14 12:31 PM
12/12/14 12:31 PM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Quote:
Just for your info... vac is measured in inches of
HG not pounds
Good gawd.....you know what I meant.....you boys split more hair than a barber...
I'm just trying to tell you what is proper....most
people would just says thanks for the info... I guess
you dont
If "proper" is so important. ...why didnt you use the modern scale for gauging vacuum.....kPa.....and your welcome.
Not since docbutthead was here have I felt the need to use this... 
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Re: what gains did you find with dry sump?
[Re: RT540]
#1708650
12/12/14 06:42 PM
12/12/14 06:42 PM
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Joined: Jan 2003
Posts: 31,051
Oregon
AndyF
I Win
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I Win
Joined: Jan 2003
Posts: 31,051
Oregon
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Quote:
Regarding vacuum with only a dry sump pump.
Reas this thread, it is possible to have 17" in some motor combinations.
http://www.yellowbullet.com/forum/showthread.php?t=1134290&highlight=
Yeah, a good dry sump pump these days should be able to pull up to 20" or more depending on how fast you want to spin it. My new Peterson pump will pull more than 15" when I'm running at 50% of crank speed.
As for the other debate, if the rings package is designed to work with a crankcase vacuum then running the engine without a vacuum will drop the HP a bunch. That is just the way the engine is designed and it doesn't mean that the engine is built wrong. Super narrow rings need the help from crankcase vacuum to seal. That is why a Pro class engine will lose 50 hp if you put a breather on the valve cover. Those engines are designed to be run sealed up with a pan vacuum.
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To late, he beat me to it 
