Injector Dynamics - Page 2

***EvansTuningDotCom*** · 03-10-2010, 07:10 AM

Quote:

Originally Posted by yoooooo

fuel injector size for n/a setup with aftermarket cams, custom header, and 3" exhaust, hoping to reach 250whp.

The RDX injectors are most likely the way to go. At 220 whp with an uncrushed regulator they were at 74% duty cycle peak, so you should be around 90% range at 250 whp.

yoooooo · 03-10-2010, 01:45 PM

if i crush my FPR, would it be safer? if i was able to get the tool to crush it. cause i think i remember reading that duty cycle should be around 80% max.

vtecmike1 · 03-10-2010, 07:14 PM

stock fuel injectors can handle higher duty cycles then lets say rc injectors. stock injectors can be in the 90% ish duty cycle. but 80 is a better number.

i think the ID's perform fine with high duty as well.

i still think stock injectors with a crushed fpr would handle a 250whp NA build.

but rdx injectors on a crushed reg would work too and be a nice peace of mind.
lower and more comfortable duty cycle

keep in mind comptech's stage 1 kit with bolt on's hits 250-260whp all day long. and they run stock fuel injectors and a crushed reg.
so rdx's would DEF work.

***EvansTuningDotCom*** · 03-11-2010, 07:47 AM

Quote:

Originally Posted by yoooooo

if i crush my FPR, would it be safer? if i was able to get the tool to crush it. cause i think i remember reading that duty cycle should be around 80% max.

If you are going to keep the stock injectors, yes. You have no other means to increase fuel capacity. The factory injectors can safely run around 90% duty cycle long term.

Quote:

Originally Posted by vtecmike1

stock fuel injectors can handle higher duty cycles then lets say rc injectors. stock injectors can be in the 90% ish duty cycle. but 80 is a better number.

i think the ID's perform fine with high duty as well.

i still think stock injectors with a crushed fpr would handle a 250whp NA build.

but rdx injectors on a crushed reg would work too and be a nice peace of mind.
lower and more comfortable duty cycle

keep in mind comptech's stage 1 kit with bolt on's hits 250-260whp all day long. and they run stock fuel injectors and a crushed reg.
so rdx's would DEF work.

The ID injectors are accurate and linear up to about 90%. You'll find that a lot of other aftermarket injectors can run up to 90%, but have huge cylinder to cylinder variations. I recommend the RDX injectors because they pick up 4-5whp N/A over the stock injectors because of the better atomization.

tehcodeman · 04-02-2010, 04:23 PM

Just ordered my 725cc's!

***FBFG*** · 04-02-2010, 04:24 PM

tehcodeman · 04-02-2010, 04:29 PM

After emailing both Evan and also Tony @ T1, I decided to go with these before I got tuned.

Tony tuned a stage2 Si yesterday and the 520cc's were hitting 87% duty on pump gas. But I've heard others hitting even higher %, so these should give me a little headroom.

***FBFG*** · 04-02-2010, 04:45 PM

I had thought about ordering these also.When mag did my tune he said I was at 93% duty

***EvansTuningDotCom*** · 04-02-2010, 10:41 PM

All orders shipped.

kadamski5140 · 04-03-2010, 09:15 AM

the clips that you can order for $40, obd2 to bosch, can those clip directly to the stock 06+civic si harness or is there need for modifications. thanx

tehcodeman · 04-03-2010, 11:36 AM

The OBD2 clips are plug and play. No wire splicing needed.

***EvansTuningDotCom*** · 04-04-2010, 09:50 PM

Quote:

Originally Posted by kadamski5140

the clips that you can order for $40, obd2 to bosch, can those clip directly to the stock 06+civic si harness or is there need for modifications. thanx

They are a direct fitment for the Si harness.

kadamski5140 · 04-05-2010, 10:41 AM

Quote:

Originally Posted by EvansTuningDotCom

They are a direct fitment for the Si harness.

do the I'd injectors have better atomization for my na build?

***EvansTuningDotCom*** · 04-16-2010, 07:38 AM

Quote:

Originally Posted by kadamski5140

do the I'd injectors have better atomization for my na build?

If you are running them at 80-100psi base pressure, yes.

**Br3TT** · 04-19-2010, 04:18 PM

i need to order some 725ID's for my supercharger i just bought

***EvansTuningDotCom*** · 04-19-2010, 09:27 PM

Quote:

Originally Posted by Br3TT

i need to order some 725ID's for my supercharger i just bought

One set that size left in stock right now!

808TWFG1 · 04-22-2010, 05:18 AM

Do they fit in the r18 civic? Now that flashpro is comming out, gotta get bigger injectors! Also do we need the clips also for the r18?

***EvansTuningDotCom*** · 04-22-2010, 07:35 PM

Quote:

Originally Posted by 808TWFG1

Do they fit in the r18 civic? Now that flashpro is comming out, gotta get bigger injectors! Also do we need the clips also for the r18?

Yes, they should fit the R18 and you will need the plug and play clips unless you want to cut your factory injector clips.

tehcodeman · 04-22-2010, 08:03 PM

Quote:

Originally Posted by 808TWFG1

Do they fit in the r18 civic? Now that flashpro is comming out, gotta get bigger injectors! Also do we need the clips also for the r18?

725cc's are total overkill for the R18...even if you were boosted.

You should stick with RDX injectors, or maybe 520cc modified Honda injectors.

808TWFG1 · 04-23-2010, 03:31 AM

you know if the RC injectors also fit the r18?

04-02-2010, 04:24 PM	#26 (permalink)
*FBFG* Big Red Detailing #1 Fan Join Date: Jan 2007 Age: 27 Posts: 36,788 Sisqo	__________________ Teh Purpul Plane Nuthin' But A G Thang™ Big Red's Beautifacations

04-02-2010, 04:45 PM	#28 (permalink)
*FBFG* Big Red Detailing #1 Fan Join Date: Jan 2007 Age: 27 Posts: 36,788 Sisqo	I had thought about ordering these also.When mag did my tune he said I was at 93% duty __________________ Teh Purpul Plane Nuthin' But A G Thang™ Big Red's Beautifacations

04-02-2010, 10:41 PM	#29 (permalink)
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03-10-2010, 01:45 PM	#22 (permalink)
yoooooo Senior Member Join Date: Jul 2009 Posts: 847	if i crush my FPR, would it be safer? if i was able to get the tool to crush it. cause i think i remember reading that duty cycle should be around 80% max.

03-10-2010, 07:14 PM	#23 (permalink)
vtecmike1 Senior Member Join Date: Nov 2007 Location: Simi Valley Age: 29 Posts: 3,950 Mike	stock fuel injectors can handle higher duty cycles then lets say rc injectors. stock injectors can be in the 90% ish duty cycle. but 80 is a better number. i think the ID's perform fine with high duty as well. i still think stock injectors with a crushed fpr would handle a 250whp NA build. but rdx injectors on a crushed reg would work too and be a nice peace of mind. lower and more comfortable duty cycle keep in mind comptech's stage 1 kit with bolt on's hits 250-260whp all day long. and they run stock fuel injectors and a crushed reg. so rdx's would DEF work.

04-02-2010, 04:23 PM	#25 (permalink)
tehcodeman Senior Member Join Date: Jul 2007 Location: Dallas Age: 29 Posts: 4,011 Cody	Just ordered my 725cc's!

04-02-2010, 04:29 PM	#27 (permalink)
tehcodeman Senior Member Join Date: Jul 2007 Location: Dallas Age: 29 Posts: 4,011 Cody	After emailing both Evan and also Tony @ T1, I decided to go with these before I got tuned. Tony tuned a stage2 Si yesterday and the 520cc's were hitting 87% duty on pump gas. But I've heard others hitting even higher %, so these should give me a little headroom.

04-03-2010, 09:15 AM	#30 (permalink)
kadamski5140 Senior Member Join Date: Feb 2010 Location: Lockport, IL Age: 27 Posts: 269 Karol Adamski	the clips that you can order for $40, obd2 to bosch, can those clip directly to the stock 06+civic si harness or is there need for modifications. thanx

04-03-2010, 11:36 AM	#31 (permalink)
tehcodeman Senior Member Join Date: Jul 2007 Location: Dallas Age: 29 Posts: 4,011 Cody	The OBD2 clips are plug and play. No wire splicing needed.

04-22-2010, 05:18 AM	#37 (permalink)
808TWFG1 Senior Member Join Date: Nov 2008 Location: Da Big Island 808 Posts: 380 Rey	Do they fit in the r18 civic? Now that flashpro is comming out, gotta get bigger injectors! Also do we need the clips also for the r18?

04-23-2010, 03:31 AM	#40 (permalink)
808TWFG1 Senior Member Join Date: Nov 2008 Location: Da Big Island 808 Posts: 380 Rey	you know if the RC injectors also fit the r18?

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