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JabaDubRider Samba Member
Joined: June 02, 2012 Posts: 341 Location: Highland Mi
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Posted: Mon Sep 16, 2013 2:22 pm Post subject: |
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modok wrote: |
yeah, your right it is 5/8 tubes, musta been an extra big lamp i stole it from.
To make flanges, buy big washers, clamp them together, and drill two or three 1/4 holes through them near the edge. CUSTOM flanges! |
Can you elaborate on the washer trick a little more I'm trying to picture this in my head but not seeing it.
What I would really like would be to be able to buy the stock style flanges so I can custom fab my own. The exhaust I a planning is a little different and would need 4. I just like the idea of being able to buy gaskets for them from the parts store! _________________ America, everybody is in too big a rush. Lay back, take a sip of tea, mow a little grass. Then if you get tired, take a nap.
http://www.thesamba.com/vw/forum/viewtopic.php?t=536093 |
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[email protected] Samba Member
Joined: August 03, 2002 Posts: 12785 Location: Salt Lake City, Utah
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JabaDubRider Samba Member
Joined: June 02, 2012 Posts: 341 Location: Highland Mi
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Axitech Samba Member
Joined: August 31, 2011 Posts: 1265 Location: Bucks County, Pa
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Posted: Mon Jan 06, 2014 3:09 pm Post subject: |
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I just got back from installing heat risers on the rail. I was unsure if I could weld to the pipe on the Tri-Mil so I didn't want to take a chance and screw up a perfectly good exhaust. I figured, mount it at the tailpipe and if you screw it up, you can cut it off and it won't look horrible. Besides, at that point, I get hot exhaust from all four cylinders, positive pressure flow, and I can just dump the other side out the back because it's already muffled. Pics of the work. I used cutoff pieces from an old single port manifold and a couple pieces of 5/8" .120 wall tubing.
I still want to get a gasket in the flange connection (didn't have one). And I want to wrap the supply side with insulation to keep it as hot as possible into the manifold. Preliminary results: idling in the driveway. Yesterday, icing evident on side of manifold, Today. manifold is cool to the touch, but no ice at all. I will get some road test results hopefully after dinner. The pic of the pipe next to the oil filter is the 'exhaust' side of the heat riser circuit. it looked so cute, puffing little steam as it was warming up, just like it's Daddy on the other side! Bwahahahahaaa _________________ He said to them, “But now if you have a purse, take it, and also a bag; and if you don’t have a sword, sell your cloak and buy one. Luke 22:36
The strongest reason for the people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government.-Thomas Jefferson |
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JT Bryan Samba Member
Joined: September 30, 2013 Posts: 38 Location: Strasburg, Colorado
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Posted: Tue Dec 08, 2015 1:46 pm Post subject: Re: Custom Heat Riser Location? |
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my take on fixing the problem..
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Maxdog2 Samba Member
Joined: August 06, 2009 Posts: 206 Location: Grand Junction, Colorado
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Posted: Wed Dec 23, 2015 10:56 am Post subject: Re: Custom Heat Riser Location? |
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I know this is an old thread, but a read a lot to learn new things. One question I have is do you drill a hole in the collector and then weld your tube or just weld the tube to the collector?
Thanks,
David |
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Agent47 Samba Member
Joined: April 22, 2016 Posts: 271 Location: Scott AFB
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Posted: Sun Dec 17, 2017 7:09 pm Post subject: |
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jkyes wrote: |
do you just weld it into place? lots of the pictures show special flanges.
this is most similar to my muffler, where should I weld it into place? Am I correct, that I should move the left side(as you look from the back) not the right?
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I am in the process of adding a heat riser to my hotdog muffler. You will not be able to route the negative pressure side out the peashooter like stock, the internal piping is too large.
I connected mine to the junction of cylinder 1&2. I am currently rebending the tubing. I took the shortest route and it block the heat exchanger inlet. Copious amounts of rum may be the culprit for that oversight. _________________
TDCTDI wrote: |
... The VW beetle is the cockroach of the automotive world, no matter how many are killed, there always seems to be 100s more lurking in all the cracks & crevices. |
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Agent47 Samba Member
Joined: April 22, 2016 Posts: 271 Location: Scott AFB
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Posted: Sun Dec 17, 2017 7:16 pm Post subject: Re: Custom Heat Riser Location? |
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Maxdog2 wrote: |
I know this is an old thread, but a read a lot to learn new things. One question I have is do you drill a hole in the collector and then weld your tube or just weld the tube to the collector?
Thanks,
David |
David I am sure you have since answered this question or given up. You need to drill a hole first. The objective is to add a negative pressure side to the heat riser circuit. Up by the heads you produce positive pressure; meaning the pressure is pushing. when you travel downstream to the collector the exhaust gasses as coming together and traveling out the tail pipe, this creates a siphon to any tubes added their (negative pressure). I do apologize if this sounds condescending I just know when I read through forums I am looking for the guy to explain everything to me like i am dumb.
In summary adding the positve and negative pressure sides of the exhaust to the heat riser circuit will create an exhaust gas flow to generate heat like stock. _________________
TDCTDI wrote: |
... The VW beetle is the cockroach of the automotive world, no matter how many are killed, there always seems to be 100s more lurking in all the cracks & crevices. |
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modok Samba Member
Joined: October 30, 2009 Posts: 26743 Location: Colorado Springs
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Posted: Sun Dec 17, 2017 7:22 pm Post subject: Re: Custom Heat Riser Location? |
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Where you re-locate the other end of the heat riser is not a big deal.
Believe it or not, anywhere BUT the opposite exhaust pipe will work better. |
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Krochus Samba Member
Joined: January 01, 2017 Posts: 892 Location: NW Arkansas
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Posted: Sun Dec 17, 2017 7:57 pm Post subject: Re: Custom Heat Riser Location? |
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At one time I tried pulling exhaust out of the #4 and dumping it to the lowest pressure area possible the atmosphere with a lawnmower muffler
Did not work at all
Without scavenging there is no point in heat risers. The aftermarket exhaust where the riser just goes between 2 & 4 are less than useless |
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modok Samba Member
Joined: October 30, 2009 Posts: 26743 Location: Colorado Springs
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Posted: Sun Dec 17, 2017 8:07 pm Post subject: Re: Custom Heat Riser Location? |
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me too. I think it worked, exhaust definitely came out.... but it flows both ways, so pulls in cold air. |
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walter kandetzki Samba Member
Joined: June 02, 2003 Posts: 918 Location: Dillwyn, VA
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Posted: Sat Feb 26, 2022 5:51 pm Post subject: Re: Custom Heat Riser Location? |
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Old thread but do I need to use 5/8 or 1/2 tubing?about to do this to my old bug pack header that’s going on my superbug with stock 34pict carb.thanks |
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busdaddy Samba Member
Joined: February 12, 2004 Posts: 51057 Location: Surrey B.C. Canada, but thinking of Ukraine
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Posted: Sat Feb 26, 2022 6:17 pm Post subject: Re: Custom Heat Riser Location? |
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Bigger is always better, but when done right it moves so much exhaust gas size doesn't make a big difference, it still gets super hot where it matters. _________________ Rust NEVER sleeps and stock never goes out of style.
Please don't PM technical questions, ask your problem in public so everyone can play along. If you think it's too stupid post it here
Stop dead photo links! Post your photos to The Samba Gallery!
Слава Україні! |
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APPLEGREENVW Samba Member
Joined: November 30, 2003 Posts: 2379 Location: Seekonk,Massachusetts USA
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modok Samba Member
Joined: October 30, 2009 Posts: 26743 Location: Colorado Springs
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Posted: Sat May 28, 2022 1:59 pm Post subject: Re: Custom Heat Riser Location? |
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Maybe yes, It's plausible that it could. |
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oprn Samba Member
Joined: November 13, 2016 Posts: 12632 Location: Western Canada
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Posted: Sun May 29, 2022 4:57 am Post subject: Re: Custom Heat Riser Location? |
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Good thread!
I have no idea why it didn't show up when I did a search prior to starting my thread on this subject. There is one thing missing here though and that is the follow up data. All these ideas are great but without follow up temperature readings on the intake manifold it is all just theory.
Can we get some real data from you fellows please? At this point it all ends in the "It's working great" black hole of knowledge. Ya it works great but... what is great? Give us the temps PLEASE??!!! _________________ We had the stone age, the bronze age, the industrial age and now we are in the age of mass deception and mind control for corporate profit. (The mass media age) |
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