Vacuum evacuation system update...
Thread Starter
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Joined: Jul 2001
Posts: 182,997
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From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Vacuum evacuation system update...
For those who don't know - I had a vacuum evacuation system installed when I had my carbon fiber shafts installed.... Those kind of systems create a vacuum in the crankcase which helps the piston rings to seal better... because piston rings tend to flatter if too much pressure builds up.. If there's a vacuum - they'll seat better. So that's the theory.. but how were my results??
Well - that system really works... I reduced my oil consumption (which I believed was 95% from the intake gasket) from 1 quart for 200 miles to less than 25% of that... a 75% reduction.. The car also stopped smoking at idle.. :eek: :eek: :cool: :cool:
Well - that system really works... I reduced my oil consumption (which I believed was 95% from the intake gasket) from 1 quart for 200 miles to less than 25% of that... a 75% reduction.. The car also stopped smoking at idle.. :eek: :eek: :cool: :cool:
Thread Starter
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Re: Vacuum evacuation system update... (comp)
you did fix intake leak?? if no vac.system not going to work as well, how much
vac. are you pulling on average?
vac. are you pulling on average?
The evacuation system makes more sense.. THe higher the RPM - the more pressure builds up in the crankcase.. The PCV has hardly any vacuum at high RPM's.. However - that's when the vacuum is needed most... The evacuation system also prevents leaks at all the gaskets because of eliminated pressure in the crankcase.. It was one of the best things that I've done to the car so far!! :yesnod: :yesnod:
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From: eville in
Re: Vacuum evacuation system update... (GrandSportC3)
bear with me new to typing, at idle you shouldn't be getting ring flutter, so
you need to do a hot/cold compression test then a hot/cold leak down , do you measure crankcase vac. i was told to do so, a malfuction can Vac. the
oil pan quik
you need to do a hot/cold compression test then a hot/cold leak down , do you measure crankcase vac. i was told to do so, a malfuction can Vac. the
oil pan quik
Thread Starter
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Re: Vacuum evacuation system update... (comp)
bear with me new to typing, at idle you shouldn't be getting ring flutter, so
you need to do a hot/cold compression test then a hot/cold leak down , do you measure crankcase vac. i was told to do so, a malfuction can Vac. the
oil pan quik
you need to do a hot/cold compression test then a hot/cold leak down , do you measure crankcase vac. i was told to do so, a malfuction can Vac. the
oil pan quik
PCV systems have high vacuum at idle and low vacuum at high rpm's.. That doesn't make sense.. The higher the RPM - the more vacuum you want to neutralize the pressure..
[Modified by GrandSportC3, 10:26 AM 11/23/2003]
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Joined: Sep 2003
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From: eville in
Re: Vacuum evacuation system update... (GrandSportC3)
i understand , high idle vac,(mild cam) you can tune induction buy measuring
vac. at top end, if you show more than 2-3ins go a little more for HP for MPH,
thing is pvc is lets say pulling 20ins of vac. and its sucking oil, (WHY) is it....
if you don't pull as much with vac. system you aren't going to be pulling as
much blow-by out
vac. at top end, if you show more than 2-3ins go a little more for HP for MPH,
thing is pvc is lets say pulling 20ins of vac. and its sucking oil, (WHY) is it....
if you don't pull as much with vac. system you aren't going to be pulling as
much blow-by out
Thread Starter
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Re: Vacuum evacuation system update... (comp)
i understand , high idle vac,(mild cam) you can tune induction buy measuring
vac. at top end, if you show more than 2-3ins go a little more for HP for MPH,
thing is pvc is lets say pulling 20ins of vac. and its sucking oil, (WHY) is it....
if you don't pull as much with vac. system you aren't going to be pulling as
much blow-by out
vac. at top end, if you show more than 2-3ins go a little more for HP for MPH,
thing is pvc is lets say pulling 20ins of vac. and its sucking oil, (WHY) is it....
if you don't pull as much with vac. system you aren't going to be pulling as
much blow-by out
Team Owner
Joined: Sep 2003
Posts: 88,393
Likes: 2
From: eville in
Re: Vacuum evacuation system update... (GrandSportC3)
i ain't the expert ether, test crankcase vac. before/ after you do repair, at
different RPM's W.J. was winning in P/S w/o a vac system when other teams
couldn't control their oil systems, and started running them, and i do know a
dry sump system draws vac.
any way test it out, fix the intake and let me know , i love to learn...
different RPM's W.J. was winning in P/S w/o a vac system when other teams
couldn't control their oil systems, and started running them, and i do know a
dry sump system draws vac.
any way test it out, fix the intake and let me know , i love to learn...
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Thread Starter
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Re: Vacuum evacuation system update... (comp)
i ain't the expert ether, test crankcase vac. before/ after you do repair, at
different RPM's W.J. was winning in P/S w/o a vac system when other teams
couldn't control their oil systems, and started running them, and i do know a
dry sump system draws vac.
any way test it out, fix the intake and let me know , i love to learn...
different RPM's W.J. was winning in P/S w/o a vac system when other teams
couldn't control their oil systems, and started running them, and i do know a
dry sump system draws vac.
any way test it out, fix the intake and let me know , i love to learn...
Team Owner
Joined: Sep 2003
Posts: 88,393
Likes: 2
From: eville in
Re: Vacuum evacuation system update... (GrandSportC3)
go to Autozone or Wallyworld get a cheap vac gauge to use,and tune with it
may be old school but it works, tap in to line you plumed to engine to take
readings , you can use it to tune with after the new intake(& rejet) i even
used a $6-7 one to test ex. back pressure at lest 8 times before it got to hot,
(yep driving around town) it was cheaper than throwing parts at cars
and remember NEW TOOLS headin' World of Wheels let me know how you
do..
may be old school but it works, tap in to line you plumed to engine to take
readings , you can use it to tune with after the new intake(& rejet) i even
used a $6-7 one to test ex. back pressure at lest 8 times before it got to hot,
(yep driving around town) it was cheaper than throwing parts at cars
and remember NEW TOOLS headin' World of Wheels let me know how you
do..
Thread Starter
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Re: Vacuum evacuation system update... (comp)
go to Autozone or Wallyworld get a cheap vac gauge to use,and tune with it
may be old school but it works, tap in to line you plumed to engine to take
readings , you can use it to tune with after the new intake(& rejet) i even
used a $6-7 one to test ex. back pressure at lest 8 times before it got to hot,
(yep driving around town) it was cheaper than throwing parts at cars
and remember NEW TOOLS headin' World of Wheels let me know how you
do..
may be old school but it works, tap in to line you plumed to engine to take
readings , you can use it to tune with after the new intake(& rejet) i even
used a $6-7 one to test ex. back pressure at lest 8 times before it got to hot,
(yep driving around town) it was cheaper than throwing parts at cars
and remember NEW TOOLS headin' World of Wheels let me know how you
do..
