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WhiteJawz1 Samba Member
Joined: May 13, 2013 Posts: 87 Location: Canada
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Posted: Wed Apr 15, 2015 6:03 pm Post subject: How To Mod Stock Fuel Pump For Boost [Picture heavy] |
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I will be posting a lot of info for running boost on a vw motor and the mods required to do so, I will have links at the bottom of this post to other mods that are required. As a rule you need more fuel pressure then boost pressure or the boost will just push the fuel back to the tank this counts for any car.
Hooking up a boost reference will make the fuel pressure increase as boost builds up. Even on a stock 1600 more fuel pressure is needed.
First off their is a little hole on the fuel pump, that will need to be filled/plugged. Sand the hole so its clean and has a surface an epoxy or jb weld will stick very well to.
You will need to find a spigot. The one I had would had stuck in the fuel pump to far. I machined the end off and made it a lot shorter
You will need to drill a hole for your spigot, use a center punch to mark where you would like to put the spigot. The spigot must go on the bottom of the fuel pump. Not On Top ! Drill a small pilot hole. Then match up the right size drill bit then go a size smaller. Going a size smaller drilling then drilling the size you matched up will give you a tighter fit. This Must FIT TIGHT. Blow any dirt and metal out of fuel pump. I test fitted the hole and it fit perfect, then I put jb weld on the spigot and lightly tapped in with a hammer. It takes about 5 mins to set and a full day to fully dry.
Now hooking up a boost line to the spigot will make your fuel pressure increase to whatever amount of boost you are running
Thanks for giving my post a read, If you have any other questions please feel free to post, I love to learn all the time |
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Brian71 Samba Member
Joined: January 22, 2005 Posts: 183 Location: Prineville, OR
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Posted: Wed Apr 15, 2015 6:26 pm Post subject: |
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So, how many unnaturally aspirated engines have you built? |
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WhiteJawz1 Samba Member
Joined: May 13, 2013 Posts: 87 Location: Canada
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Posted: Wed Apr 15, 2015 6:40 pm Post subject: |
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Brian71 wrote: |
So, how many unnaturally aspirated engines have you built? |
I have built, one boosted 1679cc
Why do you ask ? |
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mcmscott Samba Member
Joined: March 12, 2010 Posts: 4848 Location: sanger ca
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Posted: Wed Apr 15, 2015 7:36 pm Post subject: |
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That is a very old mod for low hp boosted engines _________________ There are no stupid questions, only stupid people,
68 Ghia
67 T-1
65 Notch
02 Mexican beetle
74 Thing
15 Long travel rail
07 Nomad
05 f-250 |
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Quokka42 Samba Member
Joined: December 02, 2010 Posts: 3117 Location: Melbourne, Australia
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Posted: Wed Apr 15, 2015 7:42 pm Post subject: |
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What's to stop boost pressure leaking into crankcase? _________________ There has only ever been one man who was perfect, and they nailed Him to a cross. |
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FreeBug Samba Member
Joined: March 12, 2012 Posts: 4278 Location: deepest, darkest Switzerland
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Posted: Thu Apr 16, 2015 2:34 am Post subject: |
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I used to wonder about that, thinking if you could fit a valve stem seal on the bakelite spacer somehow, and epoxy over the ends of the rocker shaft on the fuel pump? |
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WhiteJawz1 Samba Member
Joined: May 13, 2013 Posts: 87 Location: Canada
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Posted: Thu Apr 16, 2015 3:27 am Post subject: |
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I have a post coming today sometime. How to seal the case so the boost pressure does not go in the case[/b] |
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Quokka42 Samba Member
Joined: December 02, 2010 Posts: 3117 Location: Melbourne, Australia
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Posted: Thu Apr 16, 2015 3:35 am Post subject: |
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Electric fuel pumps and bypass regulators are so cheaply and readily available these days I wonder why you bother? _________________ There has only ever been one man who was perfect, and they nailed Him to a cross. |
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raul arrese Samba Member
Joined: July 23, 2006 Posts: 1329 Location: miami florida
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mark tucker Samba Member
Joined: April 08, 2009 Posts: 23937 Location: SHALIMAR ,FLORIDA
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Posted: Thu Apr 16, 2015 9:30 am Post subject: |
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raul arrese wrote: |
Sorry to say its a waste of time . |
why cheep out on something like this. most boosted engine scrap piles Ive seen are a result of full supply and or jetting witch kinda go hand in hand. |
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clonebug Samba Member
Joined: January 29, 2005 Posts: 4026 Location: NW Washington
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Posted: Thu Apr 16, 2015 11:58 am Post subject: |
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So...... You pm me on STF two days ago asking how to seal the fuel pump rod cuz you couldn't bother to read it on my build page which has had pictures and the measurements since 2011.......and now you are the expert on how to do a blow thru carb turbo setup???????
........ Amazing...... _________________
vwracerdave wrote: |
Take a good long look in the mirror and report back on what you see. |
Paul.H wrote: |
That one line on that chart is probably better info than you can get from this place in a month |
My Megasquirt Fuel Injection Turbo Buggy Build
Water/Alcohol Injection
Audi TT intercooler
Upgraded to MS3Pro-Evo
EcuMaster PMU16
ECUMaster ADU5 Digital Dash
http://www.shoptalkforums.com/viewtopic.php?f=3&t=127936 |
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WhiteJawz1 Samba Member
Joined: May 13, 2013 Posts: 87 Location: Canada
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Posted: Thu Apr 16, 2015 12:11 pm Post subject: |
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clonebug wrote: |
So...... You pm me on STF two days ago asking how to seal the fuel pump rod cuz you couldn't bother to read it on my build page which has had pictures and the measurements since 2011.......and now you are the expert on how to do a blow thru carb turbo setup???????
........ Amazing...... |
I never knew it was in the build because it's like 90 pages long, and yes I did read it after you told me where it was. In no point of my post did I say I was an expert. Just making a post that's easy to find and useful to everyone.
Sorry for trying to help people |
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mcmscott Samba Member
Joined: March 12, 2010 Posts: 4848 Location: sanger ca
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Posted: Thu Apr 16, 2015 12:45 pm Post subject: |
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Suck it up, this is the samba. Kinda surprised the samba nazis didn't lock this thread and tell you to use the existing _________________ There are no stupid questions, only stupid people,
68 Ghia
67 T-1
65 Notch
02 Mexican beetle
74 Thing
15 Long travel rail
07 Nomad
05 f-250 |
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Marv [UK] Samba Member
Joined: January 07, 2009 Posts: 2225 Location: UK
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Posted: Thu Apr 16, 2015 12:45 pm Post subject: |
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WhiteJawz1 wrote: |
clonebug wrote: |
So...... You pm me on STF two days ago asking how to seal the fuel pump rod cuz you couldn't bother to read it on my build page which has had pictures and the measurements since 2011.......and now you are the expert on how to do a blow thru carb turbo setup???????
........ Amazing...... |
I never knew it was in the build because it's like 90 pages long, and yes I did read it after you told me where it was. In no point of my post did I say I was an expert. Just making a post that's easy to find and useful to everyone.
Sorry for trying to help people |
Page 1 too hard to find? _________________ The opinion of the author as expressed does not always reflect that of the author nor does he extend any apologies or assume any liability or responsibility for its content or lack thereof or for any lack of humour of the reader of any content at all, anywhere, ever. The reader agrees to all risk by reading it and is advised that any ‘issue’ is theirs alone as they chose to read it. |
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mcmscott Samba Member
Joined: March 12, 2010 Posts: 4848 Location: sanger ca
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Posted: Thu Apr 16, 2015 3:03 pm Post subject: |
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Hope this guy is not an engineer _________________ There are no stupid questions, only stupid people,
68 Ghia
67 T-1
65 Notch
02 Mexican beetle
74 Thing
15 Long travel rail
07 Nomad
05 f-250 |
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Bajaman65 Samba Member
Joined: January 16, 2007 Posts: 469 Location: Borrego Springs
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Posted: Thu Apr 16, 2015 3:48 pm Post subject: |
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clonebug wrote: |
So...... You pm me on STF two days ago asking how to seal the fuel pump rod cuz you couldn't bother to read it on my build page which has had pictures and the measurements since 2011.......and now you are the expert on how to do a blow thru carb turbo setup???????
........ Amazing...... |
Ahh, come on clonebug you know that every Internet Parrot is an expert after just reading two or three lines of every post and building one engine I want to see all of his knowledge |
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WhiteJawz1 Samba Member
Joined: May 13, 2013 Posts: 87 Location: Canada
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Posted: Sun Apr 19, 2015 12:29 pm Post subject: |
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You learn from doing and trying stuff for ur self, sorry I try to learn |
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clonebug Samba Member
Joined: January 29, 2005 Posts: 4026 Location: NW Washington
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Posted: Sun Apr 19, 2015 1:56 pm Post subject: |
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Hey ...No harm...no foul.
Maybe wording the thread a little different would have worked better.
Instead of "How to"......"How I".......
I assumed everyone would know about the pump mods by now but.....I guess it's not that easy to find anymore.
I copied the idea from "Mike Thompson" all those years ago and it worked fine for me for the 2 plus years I ran it that way. _________________
vwracerdave wrote: |
Take a good long look in the mirror and report back on what you see. |
Paul.H wrote: |
That one line on that chart is probably better info than you can get from this place in a month |
My Megasquirt Fuel Injection Turbo Buggy Build
Water/Alcohol Injection
Audi TT intercooler
Upgraded to MS3Pro-Evo
EcuMaster PMU16
ECUMaster ADU5 Digital Dash
http://www.shoptalkforums.com/viewtopic.php?f=3&t=127936 |
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