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What is involved with installing larger injectors


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#1 OneFastDoc Posted 16 August 2011 - 11:00 AM

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I am debating whether or not to do ID1000 injectors for my 2012.  I'm installing an HKS resonated midpipe, GotBoost 3" intake, and will do a Cobb custom tune at Cobb So Cal.  From what I've read, this setup, though mild, can nearly max out the stock injector duty cycle.  (please correct me if I'm wrong).  So it seems like larger injectors will give me a little margin of safety, though not really any performance advantage.  (again, correct me if I'm totally off base here).  My question is, how complicated is the installation of new injectors.  Are we talking a major labor cost here, or something the average joe can do at home?  Or is this a big waste of time and money for me and the mods I have?

Thanks.


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2012 GT-R delivered 6/7/11 (596whp, 586wtq on 100oct, now on E85 and making more hp!)
AMS DP, Cobb catted MP, GotBoost 3" intakes, ID1000 injectors, Cobb AP, SIR fuel pumps, on E85, custom tuned by Jon Drenas


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#2 paparazzi Posted 16 August 2011 - 12:01 PM

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It's not hard to do at home with a very set of tools and the right prep. If you're a good DIYer it's not a problem. I've changed them out myself.

The ESM has a very good guide. The manifold needs to come off to access the injectors and once you have the PNP harnesses there's no need to cut and splice wiring.

Make sure you have a scaled base tune to load up before you start up on the new injectors

In any event, in order to really exploit Dave's intake you should really get the 1000cc injectors.

Edited by paparazzi, 16 August 2011 - 12:02 PM.



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#3 nlpamg Posted 16 August 2011 - 12:10 PM

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Damn, Kai.  You and I have ESP.  That was the next topic I was researching.

I guess injectors are next.  Out of curiosity, how much will they adversely affect the fuel consumption?


-Phil
AMS DPs | HKS Res. MP | ID1000s | GB 3" Intakes | Tuned by Chris Black@AMS

#4 Kristian Posted 16 August 2011 - 12:32 PM

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View Postnlpamg, on Aug 16 2011, 11:10 AM, said:

Damn, Kai.  You and I have ESP.  That was the next topic I was researching.

I guess injectors are next.  Out of curiosity, how much will they adversely affect the fuel consumption?

If scaled and tuned correctly fuel consumption will not get any worse for you are only using as much of the injector as you need. Injectors are something that should never be overlooked and upgrading is always a good idea.

Installation can be done by anyone as long as you have good sense of what you are doing. Just a tip, make sure injectors sit all the way down and when rail is installed the injectors don't move up and down. Injector lift and small leaks will effect the tune and extra care when installing will save trouble later on. :)


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#5 nlpamg Posted 16 August 2011 - 12:49 PM

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View PostKristian@SPE, on Aug 16 2011, 11:32 AM, said:

If scaled and tuned correctly fuel consumption will not get any worse for you are only using as much of the injector as you need. Injectors are something that should never be overlooked and upgrading is always a good idea.

Installation can be done by anyone as long as you have good sense of what you are doing. Just a tip, make sure injectors sit all the way down and when rail is installed the injectors don't move up and down. Injector lift and small leaks will effect the tune and extra care when installing will save trouble later on. :)

Thanks!

Also, would running larger injectors require getting additional cooling, such as a larger FMIC?


-Phil
AMS DPs | HKS Res. MP | ID1000s | GB 3" Intakes | Tuned by Chris Black@AMS

#6 Kristian Posted 16 August 2011 - 03:12 PM

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View Postnlpamg, on Aug 16 2011, 11:49 AM, said:

Thanks!

Also, would running larger injectors require getting additional cooling, such as a larger FMIC?

Not required. They wont make the car run hotter at all, but keeping the temps down is always a good thing! haha :nana:


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#7 JMH-GTR Posted 20 August 2011 - 12:51 PM

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View PostOneFastDoc, on Aug 16 2011, 01:00 PM, said:

I am debating whether or not to do ID1000 injectors for my 2012. I'm installing an HKS resonated midpipe, GotBoost 3" intake, and will do a Cobb custom tune at Cobb So Cal. From what I've read, this setup, though mild, can nearly max out the stock injector duty cycle. (please correct me if I'm wrong). So it seems like larger injectors will give me a little margin of safety, though not really any performance advantage. (again, correct me if I'm totally off base here). My question is, how complicated is the installation of new injectors. Are we talking a major labor cost here, or something the average joe can do at home? Or is this a big waste of time and money for me and the mods I have?

Thanks.

Installation by doing it yourself depends on your mechanical abililty. I am guessing if you are having to ask, then the warning from TV shows comes to mind... "Don't try this at home".


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#8 Murtaza Posted 24 August 2011 - 12:30 AM

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Hey Doc, I'm currently data logging and having Ben Linney tune my car.

You will need injectors with downpipes and intake. My injectors are not maxing out with just midpipe, but they will with intake and downpipes. OEM intakes are close to maxing out, 4.9v. This is with the canned map 3 with 17.5lbs boost with 93 (91/100 mix)

Edited by Murtaza, 24 August 2011 - 12:31 AM.



______________________
2012 GTR
-Revozport CF Ducktail Trunk
-AMS Catless Downpipes
-Cobb Catless Midpipe

-Gotboost 3" Intake
-ANSU 1150cc injectors
-Dual Walbro 255
-Cobb AP


E85 Tuned by Ben Linney @ GTC

#9 GTRNY Posted 31 August 2011 - 01:22 PM

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View PostMurtaza, on 24 August 2011 - 12:30 AM, said:

Hey Doc, I'm currently data logging and having Ben Linney tune my car.

You will need injectors with downpipes and intake. My injectors are not maxing out with just midpipe, but they will with intake and downpipes. OEM intakes are close to maxing out, 4.9v. This is with the canned map 3 with 17.5lbs boost with 93 (91/100 mix)
do you have stock fuel PUMP?
Do need bigger pumps?
thanks


09 GTR Titanium 10.4@133.66 Ivey tuned
-Cobb ap Sean Ivey tuned
-ID 1000c
-Aam 3inch intake
-Ams catless dp
-Mines midpipe
-Greedy PE-R Titaninum exhurst
-Stop tech ss brake line
-Hawk dtc 70 pads for track
-Bbs Gtr limited edition
-E85 Power!!

#10 Murtaza Posted 31 August 2011 - 01:31 PM

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View PostGTRNY, on 31 August 2011 - 01:22 PM, said:

do you have stock fuel PUMP?
Do need bigger pumps?
thanks

Stock fuel pump is fine unless going E85.


______________________
2012 GTR
-Revozport CF Ducktail Trunk
-AMS Catless Downpipes
-Cobb Catless Midpipe

-Gotboost 3" Intake
-ANSU 1150cc injectors
-Dual Walbro 255
-Cobb AP


E85 Tuned by Ben Linney @ GTC


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