Perth-WRX.com  

Go Back   Perth-WRX.com > Technical > Mechanicals
Register Diddy Kart ArticlesAll AlbumsBlogs FAQ Members List Calendar Search Today's Posts Mark Forums Read


Welcome to Perth-WRX, click here to register!

Like Tree6Likes

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 06-07-2011, 08:20 PM
Rossco's Avatar
Perth WRX Old Skool Cool Dude
Member
 
Join Date: Apr 2007
Location: Perf, NOR
Posts: 5,467
Blog Entries: 11
Thanks: 54
Thanked 100 Times in 79 Posts
Rossco is a guruRossco is a guru
Send a message via MSN to Rossco
Default DIY: "Yellow Top" Sidefeed Injector De-cap

I figured I'd put this up for prosperity....

In the search for a simple fueling solution for my new motor I decided to purchase a second set of stock 440cc 'yellow top' side feeds and try to de-cap them to unshroud the pintle & increase their flow....Reportedly rumored to flow 650cc in unshrouded form.

I started with this:



Note: 4 small atomization holes and their 'D' shape and also the fine robot weld that retains the cap to the tip of the injector, preventing easy de-capping of this type of injector.

Tools: You'll need a Dremel, a soft jaw vice & a steady hand!

I used a fine grinding bit similar to this:


A low speed is best, going slow will prevent removing too much material too quickly.

After removing the plastic atomiser cap, I mounted an injector into my bench vice to hold it steady.

The aim is to grind the weld just deep enough until the centre of the welded cap is loose...

Do NOT grind over the holes themselves or you may go too deep, destroying the pintle tip and ruining the injector permanently.

Take-Your-Time!

If you are careful & take your time you'll end up with a de-capped injector with an undamaged pintle (valve tip).

Cap removed:


Note: the margin around the centre pintle that has not been touched by the grinding wheel.

It is a simple job, but be careful not to touch the centre are of the injector tip at all.

The injectors will definitely require utrasonic cleaning before use due to the fine metal dust created by the grinding wheel.


Comparison of the injectors:

L-R: Prior to removing plastic atomiser - Atomiser removed (shows welded cap) - Cap removed!

Voila! Job Done.

Note: New filter baskets, O-rings & Plastic tip caps will be fitted prior to installation.

I'll post back the results of the flow testing & spray pattern (should be a single cone spray pattern by all accounts).
teejay likes this.
__________________
[CENTER][SIGPIC][/SIGPIC][/CENTER]
[CENTER][COLOR=#ff0000]Built Ej207: Semi-closed RA Cases - Wiseco Forgies - Manley rods - BC 272 cams - GDA Heads - billet f/whl - Vi-pec - WbO2 - 800cc Yellow tops - TD05-20G - 409Hp ath @ 1.75bar on E85[/COLOR][/CENTER]

Last edited by Rossco; 04-09-2015 at 12:10 PM.
Reply With Quote
  #2  
Old 06-07-2011, 08:42 PM
RSR-WRC's Avatar
STI Master
Member
 
Join Date: Sep 2006
Location: Under my RS Liberty
Posts: 591
Thanks: 5
Thanked 4 Times in 3 Posts
RSR-WRC at standard level
Default

Love the post!!
__________________
WRC is for Boys
Group B was for Men.
Reply With Quote
  #3  
Old 06-07-2011, 08:50 PM
Kato's Avatar
Burnout!
Member
 
Join Date: Jul 2005
Location: Pimp Corner
Posts: 7,079
Thanks: 7
Thanked 120 Times in 75 Posts
Kato is a guruKato is a guru
Default

Nice one Rossco.

Can't wait to see the spray pattern.

Thread stuckified.
__________________
[COLOR="Gray"]550Nm off a 2L... Just wish it was in the dak dak...[/COLOR]
Reply With Quote
  #4  
Old 06-07-2011, 08:50 PM
Rossco's Avatar
Perth WRX Old Skool Cool Dude
Member
 
Join Date: Apr 2007
Location: Perf, NOR
Posts: 5,467
Blog Entries: 11
Thanks: 54
Thanked 100 Times in 79 Posts
Rossco is a guruRossco is a guru
Send a message via MSN to Rossco
Default

Thankyou! ~ 3700 yeeeow!
__________________
[CENTER][SIGPIC][/SIGPIC][/CENTER]
[CENTER][COLOR=#ff0000]Built Ej207: Semi-closed RA Cases - Wiseco Forgies - Manley rods - BC 272 cams - GDA Heads - billet f/whl - Vi-pec - WbO2 - 800cc Yellow tops - TD05-20G - 409Hp ath @ 1.75bar on E85[/COLOR][/CENTER]
Reply With Quote
  #5  
Old 06-07-2011, 08:55 PM
Andy sti's Avatar
WRX Hi Five Club
Member
 
Join Date: Mar 2011
Location: Huntingdale
Posts: 150
Thanks: 1
Thanked 0 Times in 0 Posts
Andy sti at standard level
Default

im gonna give it a go
Reply With Quote
  #6  
Old 15-07-2011, 05:36 AM
Potty Training Scoobie Noobie
Member
 
Join Date: Oct 2007
Location: applecross
Posts: 60
Thanks: 0
Thanked 0 Times in 0 Posts
dachopper at standard level
Default

hey rossco - do you know of any1 fitted with these?
__________________
STI RA V6.... 12.55 Stock
Reply With Quote
  #7  
Old 15-07-2011, 06:05 AM
Rexxar's Avatar
Flat Four Father
Member
 
Join Date: Dec 2007
Location: far far SOR
Posts: 2,299
Thanks: 12
Thanked 6 Times in 6 Posts
Rexxar at standard level
Send a message via MSN to Rexxar
Default

me with but with TOP feed same thing get it cleaned and away you go
__________________
Chinese Mexican
[SIGPIC][/SIGPIC]
Reply With Quote
  #8  
Old 15-07-2011, 04:08 PM
Potty Training Scoobie Noobie
Member
 
Join Date: Oct 2007
Location: applecross
Posts: 60
Thanks: 0
Thanked 0 Times in 0 Posts
dachopper at standard level
Default

300hp atw?
__________________
STI RA V6.... 12.55 Stock
Reply With Quote
  #9  
Old 26-09-2011, 02:51 PM
RXqME's Avatar
STI Master
Member
 
Join Date: Aug 2007
Location: Ellenbrook
Posts: 570
Thanks: 3
Thanked 1 Time in 1 Post
RXqME at standard level
Default

Hey rossco, where abouts did you get the new filter baskets, O-rings & plastic caps from? Genuine?
Reply With Quote
  #10  
Old 01-11-2011, 01:41 PM
Stona's Avatar
Potty Training Scoobie Noobie
Member
 
Join Date: Jan 2011
Location: Mahogany Creek
Posts: 60
Thanks: 0
Thanked 0 Times in 0 Posts
Stona at standard level
Default Pintel caps..!?

Yeah I can't get / find the pintel caps either Rossco... do you where abouts you can get replacements from..

No luck at subaru genuine stuff... can only get the O-rings.. no caps.

Any suppliers you know of would choice...

cheers

p.s nice work on the grinds.. one or two beers required?
Reply With Quote
Reply

Tags
decap, decapping, diy, injector, sidefeed, yellow top

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On




Welcome to Perth-WRX, click here to register!

All times are GMT +8. The time now is 02:07 AM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO