Subaru WRX Denso 440CC to 720CC mod - D-series.org

Go Back   D-series.org Motor Mayhem & Suspension Satisfaction Forced Induction

D-Series.org is the premier Honda All Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 12-25-2015, 11:54 PM   #1 (permalink)
D-series lover
 
JRSC_D16's Avatar
 
iTrader: (0)
Join Date: May 2010
Posts: 230
Rep Power: 10 JRSC_D16 is nobody
iTrader Score: 0 reviews
Default Subaru WRX Denso 440CC to 720CC mod

Hey guys,
I heared that some people cut off the restrictor if this injector, and it makes it flow like a 720CC injector. Those injectors fits also in civic.

Someone here tried it and has some thoughts?
__________________
95 Civic EH9
ZC stock
Stock I/M
Front big intercooler
Ebay turbo T3/T4 - A/R 50. boost ~ 0.5 bar
TIAL wastegate
Ebay Exhaust manifold + 2.5" straight pipe
Turbo Ibiza muffler
Greddy type s BOV
P28 street tuned
RC550 injectors
S20 B000 tranny
JRSC_D16 is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 12-26-2015, 03:48 AM   #2 (permalink)
D-series soldier
 
robgoof's Avatar
 
iTrader: (3)
Join Date: May 2014
Location: and maple syrup ,Eh
Posts: 754
Rep Power: 17 robgoof is the fucking MAN!!!!robgoof is the fucking MAN!!!!robgoof is the fucking MAN!!!!robgoof is the fucking MAN!!!!
robgoof is the fucking MAN!!!!robgoof is the fucking MAN!!!!robgoof is the fucking MAN!!!!robgoof is the fucking MAN!!!!robgoof is the fucking MAN!!!!robgoof is the fucking MAN!!!!robgoof is the fucking MAN!!!!robgoof is the fucking MAN!!!!robgoof is the fucking MAN!!!!robgoof is the fucking MAN!!!!robgoof is the fucking MAN!!!!robgoof is the fucking MAN!!!!robgoof is the fucking MAN!!!!robgoof is the fucking MAN!!!!robgoof is the fucking MAN!!!!
iTrader Score: 3 reviews
Default

I've done it on newer bosch injectors , so I can't say anything about the denso ones.

It is a good idea to get a matched set that has been tested for flow...

I only use uncapped injectors cuz I'm a hack and don't care what others say about these methods.
robgoof is offline   Reply With Quote Quick reply to this message
Old 12-26-2015, 07:23 AM   #3 (permalink)
D-series post SLUT
 
snm95ls's Avatar
 
iTrader: (16)
Join Date: Oct 2006
Posts: 2,794
Rep Power: 26 snm95ls Still a JDM Star....
snm95ls Still a JDM Star....snm95ls Still a JDM Star....snm95ls Still a JDM Star....snm95ls Still a JDM Star....snm95ls Still a JDM Star....snm95ls Still a JDM Star....snm95ls Still a JDM Star....snm95ls Still a JDM Star....snm95ls Still a JDM Star....
iTrader Score: 16 reviews
Default

They are used all the time in Subarus. It really doesn't seem to have any major adverse affects. Not ideal I would imagine, but it works.

I haven't seen anyone post spray patterns post mod though.

I very well may be speaking out of my ass here, but I think that decapping and flow matching OEM injectors is pretty much what DeatschWerks does with their Subaru injectors.
__________________
06 Legacy GT Spec B DD
2017 Suzuki SV650



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
snm95ls is offline   Reply With Quote Quick reply to this message
 
Old 12-26-2015, 08:39 AM   #4 (permalink)
the artist formerly known as drexelstudent11
 
shoebox_civic's Avatar
 
iTrader: (14)
Join Date: Mar 2007
Location: Norristown, PA
Posts: 3,983
Rep Power: 28 shoebox_civic Still a JDM Star....shoebox_civic Still a JDM Star....
shoebox_civic Still a JDM Star....shoebox_civic Still a JDM Star....
iTrader Score: 14 reviews
Send a message via AIM to shoebox_civic
Default

Quote:
Originally Posted by snm95ls View Post
They are used all the time in Subarus. It really doesn't seem to have any major adverse affects. Not ideal I would imagine, but it works.

I haven't seen anyone post spray patterns post mod though.

I very well may be speaking out of my ass here, but I think that decapping and flow matching OEM injectors is pretty much what DeatschWerks does with their Subaru injectors.
8 years ago, yes, but nowadays it's all bespoke stuff
__________________
99 CRV
17 Q50 2.0T
07 350Z touring
90 Skyline GT-R - HKS Drager exhaust, RSR downpipe, metal wheel turbos
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
shoebox_civic is offline   Reply With Quote Quick reply to this message
Old 12-26-2015, 09:39 AM   #5 (permalink)
D-series post SLUT
 
snm95ls's Avatar
 
iTrader: (16)
Join Date: Oct 2006
Posts: 2,794
Rep Power: 26 snm95ls Still a JDM Star....
snm95ls Still a JDM Star....snm95ls Still a JDM Star....snm95ls Still a JDM Star....snm95ls Still a JDM Star....snm95ls Still a JDM Star....snm95ls Still a JDM Star....snm95ls Still a JDM Star....snm95ls Still a JDM Star....snm95ls Still a JDM Star....
iTrader Score: 16 reviews
Default

Quote:
Originally Posted by shoebox_civic View Post
8 years ago, yes, but nowadays it's all bespoke stuff
Good deal. I do know that they still use OEM cores for a few of them as they offer trade ins.
__________________
06 Legacy GT Spec B DD
2017 Suzuki SV650



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
snm95ls is offline   Reply With Quote Quick reply to this message
Old 12-29-2015, 03:41 PM   #6 (permalink)
D-series PIMP
 
90dirtydsi's Avatar
 
iTrader: (11)
Join Date: Mar 2009
Location: Frankensteinville
Posts: 1,327
Rep Power: 13 90dirtydsi It's a JDM Star Bitches....
90dirtydsi It's a JDM Star Bitches....90dirtydsi It's a JDM Star Bitches....90dirtydsi It's a JDM Star Bitches....
iTrader Score: 11 reviews
Default

I did this once on a sti swapped bugeye wagon I built a few years ago. Worked fine for as long as the car was around.
__________________
94 Civic Sedan - shooting for 11.99 at full weight
Rocket cams
Injector Nation

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
RIP
90dirtydsi is offline   Reply With Quote Quick reply to this message
Old 12-29-2015, 07:54 PM   #7 (permalink)
D-series post SLUT
 
JoelEspinoza's Avatar
 
iTrader: (5)
Join Date: Oct 2010
Location: Texas
Posts: 2,000
Rep Power: 13 JoelEspinoza is hot as a volcano
JoelEspinoza is hot as a volcanoJoelEspinoza is hot as a volcanoJoelEspinoza is hot as a volcanoJoelEspinoza is hot as a volcanoJoelEspinoza is hot as a volcanoJoelEspinoza is hot as a volcanoJoelEspinoza is hot as a volcanoJoelEspinoza is hot as a volcanoJoelEspinoza is hot as a volcanoJoelEspinoza is hot as a volcanoJoelEspinoza is hot as a volcanoJoelEspinoza is hot as a volcano
iTrader Score: 5 reviews
Default

Id be curious what the before and after spray pattern looked like.
__________________
Give a man a match, you will keep him warm for a minute. Light him on fire, however, and he will be warm the rest of his life....
JoelEspinoza is offline   Reply With Quote Quick reply to this message
Old 12-30-2015, 06:16 AM   #8 (permalink)
D-Series cadet
 
gtpilot's Avatar
 
iTrader: (0)
Join Date: Oct 2003
Location: Lakeway, TX
Posts: 416
Rep Power: 19 gtpilot is almost there....
gtpilot is almost there....gtpilot is almost there....gtpilot is almost there....gtpilot is almost there....gtpilot is almost there....gtpilot is almost there....gtpilot is almost there....gtpilot is almost there....gtpilot is almost there....gtpilot is almost there....
iTrader Score: 0 reviews
Default

Quote:
Originally Posted by JoelEspinoza View Post
Id be curious what the before and after spray pattern looked like.
...and the latency/dwell time on the injector flowing that much...
__________________
Kirk
IandI Motorsports
gtpilot is offline   Reply With Quote Quick reply to this message
Old 12-30-2015, 07:08 AM   #9 (permalink)
D-series PIMP
 
HiProfile's Avatar
 
iTrader: (9)
Join Date: Sep 2005
Location: SoWis
Posts: 1,225
Rep Power: 24 HiProfile is the fucking MAN!!!!HiProfile is the fucking MAN!!!!HiProfile is the fucking MAN!!!!HiProfile is the fucking MAN!!!!
HiProfile is the fucking MAN!!!!HiProfile is the fucking MAN!!!!HiProfile is the fucking MAN!!!!HiProfile is the fucking MAN!!!!HiProfile is the fucking MAN!!!!HiProfile is the fucking MAN!!!!HiProfile is the fucking MAN!!!!HiProfile is the fucking MAN!!!!HiProfile is the fucking MAN!!!!
iTrader Score: 9 reviews
Default

It's sort of like the old-fashioned garden hose tip. They use a disc-style valve, so it creates a flame-shape then it separates into droplets. Not very efficient, and sometimes there's chatter that slightly alters the pattern.

The two big problem is it alters latency, albeit slightly, and there's a vast mis-match of flow. You could get them flow tested, but that almost defeats the purpose. Decapped Densos have a 15% spread between the largest & smallest, which is one reason I've avoided them in favor for Bosch.

IMO you are better off with a big fuel pump & adj. FPR to crank the fuel. Most builds won't even max them out at the D's 38-40psi fuel pressure.
__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
HiProfile is offline   Reply With Quote Quick reply to this message
Old 12-30-2015, 08:01 AM   #10 (permalink)
Member
 
flat_'s Avatar
 
iTrader: (2)
Join Date: Feb 2011
Location: mile HIGH city
Posts: 50
Rep Power: 0 flat_ is starting to learn the ropesflat_ is starting to learn the ropesflat_ is starting to learn the ropesflat_ is starting to learn the ropesflat_ is starting to learn the ropesflat_ is starting to learn the ropes
iTrader Score: 2 reviews
Default

Most likely the spray pattern is similar to these.

2002 ish camry injectors decapped, flowing 60lbs.



[URL=http://s1365.photobucket.com/user/wrenchrz/media/IMG_20130606_175657_zpsih5xyari.jpg.html]

I chose these to try because they resemble the subaru injectors on the out side,internally they may be different.

They flowed pretty close, I only used the 1 3 4 and 6.

[/URL]

I've been running them for two years at 10lbs of boost with the fuel pressure cranked a little to aid atomization, still doesn't idle vary well and I'm not a good tuner.

My next engine will be getting IN injectors.
flat_ is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the D-series.org forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Security Question
*Required, this field is not shown to others: While balancing on a piece of wood, two inches by four inches known as a 2x4, john and his friend sally both spotted a dalmatian inside a truck with sirens, headed to put out a fire. State what kind of animal is mentioned in the sentence above.
Insurance
Please select your insurance company (Optional)

Log-in



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may post new threads
You may 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


iconAll times are GMT -8. The time now is 03:53 AM. | Welcome to Forum, please register to access all of our features.