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Re: Header evac tubes- how do they compare to vac pumps [Re: Mr.Yuck] #624352 03/03/10 02:12 PM 03/03/10 02:12 PM
Joined: Feb 2010 Posts: 1,377 Ohio Todd pro stock
Todd pro stock Joined: Feb 2010 Posts: 1,377 Ohio	I was wondering about the angle of the tube.90 degrees and down in the pipe or flush with the pipe?

Re: Header evac tubes- how do they compare to vac pumps [Re: Todd] #624353 03/03/10 02:25 PM 03/03/10 02:25 PM
Joined: Jan 2003 Posts: 24,562 Brookeville, Md Mr.Yuck Not enough dumb comments...yet
Mr.Yuck Not enough dumb comments...yet Joined: Jan 2003 Posts: 24,562 Brookeville, Md	Quote: I was wondering about the angle of the tube.90 degrees and down in the pipe or flush with the pipe? click the link. http://static.summitracing.com/global/images/instructions/mor-25900.pdf

Re: Header evac tubes- how do they compare to vac pumps [Re: Mr.Yuck] #624354 03/03/10 02:33 PM 03/03/10 02:33 PM
Joined: Feb 2010 Posts: 1,377 Ohio Todd pro stock
Todd pro stock Joined: Feb 2010 Posts: 1,377 Ohio	that is the one way ive seen it installed and the other way looks the same but the tube is rotated around 180 degrees so the angled end faces the exit of the pipe. I would like to know what is the best way.

Re: Header evac tubes- how do they compare to vac pumps [Re: Todd] #624355 03/03/10 02:40 PM 03/03/10 02:40 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: what is the best position for the tubes in the headers? Ive seen them installed a couple of differnt ways. I prefer the flat of the tube to be parallel with the exit of the collector

Re: Header evac tubes- how do they compare to vac pumps [Re: Todd] #624356 03/03/10 02:42 PM 03/03/10 02:42 PM
Joined: Jan 2003 Posts: 24,562 Brookeville, Md Mr.Yuck Not enough dumb comments...yet
Mr.Yuck Not enough dumb comments...yet Joined: Jan 2003 Posts: 24,562 Brookeville, Md	Quote: that is the one way ive seen it installed and the other way looks the same but the tube is rotated around 180 degrees so the angled end faces the exit of the pipe. I would like to know what is the best way. not sure I understand you, the tube is placed at a 45* towards the exhaust. I think as long as you have the tube towards the rear of the car you are ok. Not everybody has room right on top of the header like that.

Re: Header evac tubes- how do they compare to vac pumps [Re: MR_P_BODY] #624357 03/03/10 02:58 PM 03/03/10 02:58 PM
Joined: Feb 2010 Posts: 1,377 Ohio Todd pro stock
Todd pro stock Joined: Feb 2010 Posts: 1,377 Ohio	I think thats the way im going to install them. Makes much more sense than the angle paralell to the pipe and not the collector.

Re: Header evac tubes- how do they compare to vac pumps? [Re: tjmarcus1] #624358 03/03/10 04:37 PM 03/03/10 04:37 PM
Joined: Dec 2009 Posts: 242 Upland, California Spode enthusiast
Spode enthusiast Joined: Dec 2009 Posts: 242 Upland, California	Some tech answers for guys like me who didnt know thing about this subject web page

Re: Header evac tubes- how do they compare to vac pumps? [Re: Spode] #624359 03/03/10 05:59 PM 03/03/10 05:59 PM
Joined: Jan 2003 Posts: 24,562 Brookeville, Md Mr.Yuck Not enough dumb comments...yet
Mr.Yuck Not enough dumb comments...yet Joined: Jan 2003 Posts: 24,562 Brookeville, Md	Quote: Some tech answers for guys like me who didnt know thing about this subject web page you're sooo right forgive us stuuupid folks.

Re: Header evac tubes- how do they compare to vac pumps? [Re: Mr.Yuck] #624360 03/04/10 12:31 AM 03/04/10 12:31 AM
Joined: Dec 2009 Posts: 242 Upland, California Spode enthusiast
Spode enthusiast Joined: Dec 2009 Posts: 242 Upland, California	Quote: Quote: Some tech answers for guys like me who didnt know thing about this subject web page you're sooo right forgive us stuuupid folks. anytime

Re: Header evac tubes- how do they compare to vac pumps? [Re: Spode] #624361 03/04/10 11:31 AM 03/04/10 11:31 AM
Joined: Jan 2007 Posts: 3,695 nc E emarine01 master
emarine01 master E Joined: Jan 2007 Posts: 3,695 nc	Last winter we messed with our moroso header ev system because we had a problem with the check valves rusting and gettin stuck, I cut the weld holding the tube in the collector < open headers> and played with moving the tube around while running the engine @ 2500 rpm to find the spot with max vacuum, I also booted the check valves and found some more vac with out them, With the morosso system installed as per their instructions we made around 2 to 2.5 inches, I posted last year about anyone not running the check valves cause I was not sure if this was gona be a problem and for the most part had not found anyone blowing up on a back fire. Raff posted a pic of a curved e vac tube that was square with the collector tube so I tried it out and found some more vac that way, I also found that the breather cap tube was too close to the baffle in the valve cover and found some more there, So by the end of messin around we more than doubled the vac @ 2500 rpm, I have seen as much as 5.5 inches and have not blown up yet. As far as power goes I cant tell any difference but no more oil leaks

Re: Header evac tubes- how do they compare to vac pumps? [Re: emarine01] #624362 03/11/10 01:18 PM 03/11/10 01:18 PM
Joined: Sep 2006 Posts: 1,139 West Tennessee R rbstroker super stock
rbstroker super stock R Joined: Sep 2006 Posts: 1,139 West Tennessee	This question will probably sound really dumb, but how much vacuum would a stock PVC setup and the stock breather to air cleaner tube put on the crancase in comparison with an evac setup on the headers? This is the land of the free because of the brave

Re: Header evac tubes- how do they compare to vac pumps? [Re: rbstroker] #624363 03/11/10 02:27 PM 03/11/10 02:27 PM
Joined: Oct 2003 Posts: 4,008 South Park, Pa. 68LAR master
68LAR master Joined: Oct 2003 Posts: 4,008 South Park, Pa.	Quote: This question will probably sound really dumb, but how much vacuum would a stock PVC setup and the stock breather to air cleaner tube put on the crancase in comparison with an evac setup on the headers? It depends on the cam being used. But at full throttle, there should be >3" hg. 4 speed street legal. Best time 10.99 @ 124 mph on 93 octane pump gas @ 3926# total weight

Re: Header evac tubes- how do they compare to vac pumps [Re: Todd] #624364 03/11/10 04:05 PM 03/11/10 04:05 PM
Joined: Oct 2003 Posts: 7,506 Az Crizila master
Crizila master Joined: Oct 2003 Posts: 7,506 Az	Quote: I think thats the way im going to install them. Makes much more sense than the angle paralell to the pipe and not the collector. This is what I am trying right now. 45 degree entrance about 1/2" in. End is parallel to the pipe and 1/2 of it is capped and the trailing 1/2 of the pipe is cut flush with the pipe. 5858643-evacpipe2.jpg (110 downloads) Fastest 300

Re: Header evac tubes- how do they compare to vac pumps [Re: Crizila] #624365 03/11/10 05:45 PM 03/11/10 05:45 PM
Joined: Feb 2010 Posts: 1,377 Ohio Todd pro stock
Todd pro stock Joined: Feb 2010 Posts: 1,377 Ohio	Have you ever syphoned anything with a blow gun and compressed air? What way is it most effective? My guess would be to have the angled cut of the evac tube paralell to the collector. I would turn the tube 180 degrees and leave the 45 degree entrance angle and see what happens.

Re: Header evac tubes- how do they compare to vac pumps [Re: Todd] #624366 03/11/10 05:51 PM 03/11/10 05:51 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: Have you ever syphoned anything with a blow gun and compressed air? What way is it most effective? My guess would be to have the angled cut of the evac tube paralell to the collector. I would turn the tube 180 degrees and leave the 45 degree entrance angle and see what happens. Did you get yours in?

Re: Header evac tubes- how do they compare to vac pumps [Re: MR_P_BODY] #624367 03/11/10 06:03 PM 03/11/10 06:03 PM
Joined: Feb 2010 Posts: 1,377 Ohio Todd pro stock
Todd pro stock Joined: Feb 2010 Posts: 1,377 Ohio	Not Yet. But im definatly going to take a picture and post it.

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