GT-R turbos on the VQ37

Jayhovah · 07-28-2017, 10:22 PM

Which injectors did you go with? and which pump are you running?

husam2012 · 07-30-2017, 10:27 PM

Quote:

Originally Posted by Jayhovah

Which injectors did you go with? and which pump are you running?

I'm running the aeromotive 340 with Nostrum Energy 1000cc injectors supplied by my tuner.

Currently it's running weird with these injectors after the retune but my duty cycle is just around 60 now so hopefully we can figure it out without a return system.

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husam2012 · 07-31-2017, 08:18 PM

Finally some free time today. I think I figured out why bank 1 was richer/maf voltage lower.

It looks like this clamp wasn't tight enough since I could pull move it with some force. Tightened it to as much as I could without breaking it

Also some more pictures since I don't think I've posted these before

Steering rack shims/ spacers

Steering shaft clearance is about a finger width now. Shouldn't be an issue at all

Passenger side. Excuse the messy downpipe haha

Tidying things up and looks like I have a small pinhole in the wastegate line! Maybe that's why it goes up to 12 psi. I hope so atleast

Also, thanks for the idea whoever posted it here. I tested the wastegates and they open at the same time but the guage isn't very accurate I think since it takes 20 psi to open it all the way. It starts opening around 4-5 psi but the guage is off since it's a cheap $10 pump

Edit: just did a pull after making sure there's no boost leaks and it's still at 12 psi and even 13 :/

Good news is my new injectors are working perfectly WOT (60% duty cycle now)but a little weird while idle which is understandable.

Notice the boost at 3000rpm

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natedog37 · 08-04-2017, 02:32 PM

Good news is my new injectors are working perfectly WOT (60% duty cycle now)but a little weird while idle which is understandable.

Great thread! I sub'd right away and am so glad to see your car up and running. I
ve been researching Fuel injectors a lot lately for my Powerstroke. One thing I came across was that rebuilt injectors were a having a tough time idling, whereas brand new ones never seems to have that problem. Are yours Rebuilt? I read multiple threads of guys having to switch out individual injectors until they were "balanced" to get their trucks to idle right. Just something to consider. Rock on!

Jayhovah · 08-04-2017, 02:36 PM

Quote:

Originally Posted by natedog37

Good news is my new injectors are working perfectly WOT (60% duty cycle now)but a little weird while idle which is understandable.

Great thread! I sub'd right away and am so glad to see your car up and running. I
ve been researching Fuel injectors a lot lately for my Powerstroke. One thing I came across was that rebuilt injectors were a having a tough time idling, whereas brand new ones never seems to have that problem. Are yours Rebuilt? I read multiple threads of guys having to switch out individual injectors until they were "balanced" to get their trucks to idle right. Just something to consider. Rock on!

Interesting... Never heard that myself. Generally when you send a whole set of injectors in for service they will balance the flow between them.

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husam2012 · 08-04-2017, 02:54 PM

The car actually didn't run right with these injectors as they were originally engineereed for the 350z. The replacements are coming in either Saturday or Monday (1050cc)!

I'm hoping I will be able to run e85 with them for safety. Car runs perfect otherwise

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Hotrodz · 08-04-2017, 03:00 PM

Quote:

Originally Posted by husam2012

The car actually didn't run right with these injectors as they were originally engineereed for the 350z. The replacements are coming in either Saturday or Monday (1050cc)!

I'm hoping I will be able to run e85 with them for safety. Car runs perfect otherwise

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You should not have any problem with those sized injectors. More importantly is what size your is your fuel pump and is e85 compatible?

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husam2012 · 08-04-2017, 03:33 PM

Yeah I have the aeromotive 340 which is e85 compatible.
Just hoping that running 10-12 psi of boost won't throw my fuel pressure too low.

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Hotrodz · 08-04-2017, 03:38 PM

Quote:

Originally Posted by husam2012

Yeah I have the aeromotive 340 which is e85 compatible.
Just hoping that running 10-12 psi of boost won't throw my fuel pressure too low.

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It will be close...

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Jayhovah · 08-04-2017, 07:21 PM

Should be able to make up the difference with those 1050cc's... Mine creeps close to 11psi.

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husam2012 · 08-04-2017, 07:30 PM

Quote:

Originally Posted by Jayhovah

Should be able to make up the difference with those 1050cc's... Mine creeps close to 11psi.

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That's perfect! Do you have the ecutek map graph? Shows how fast it spools etc

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Jayhovah · 08-04-2017, 07:38 PM

Quote:

Originally Posted by husam2012

That's perfect! Do you have the ecutek map graph? Shows how fast it spools etc

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I do not unfortunately... I'm on a MAF tune so no pressure reference to log... I could put my GoPro on the gauge or something lol

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Jayhovah · 08-04-2017, 07:43 PM

It spools to the full 8.5 psi pretty fast.. probably around 3-3.5k.. could be a good deal quicker but I don't run a boost controller... I get the creep at full throttle at the top of 4/5/6th gear... (Not that I have ever seen the top of 6th)

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husam2012 · 08-04-2017, 07:45 PM

Quote:

Originally Posted by Jayhovah

It spools to the full 8.5 psi pretty fast.. probably around 3-3.5k.. could be a good deal quicker but I don't run a boost controller... I get the creep at full throttle at the top of 4/5/6th gear... (Not that I have ever seen the top of 6th)

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Sounds good! I wonder if mine will creep even more in higher gears. It's currently topping at 12 to 13 psi at redline. 8 psi from 2500 and 12 from 3500~

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Jayhovah · 08-04-2017, 07:47 PM

Quote:

Originally Posted by husam2012

Sounds good! I wonder if mine will creep even more in higher gears. It's currently topping at 12 to 13 psi at redline. 8 psi from 2500 and 12 from 3500~

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I'll be interested to see! Can't say enough now that you're done how much I love this build. Well done!!!!

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07-31-2017, 08:18 PM	#363 (permalink)
husam2012 Track Member Join Date: Mar 2015 Location: Michigan Posts: 549 Drives: 370Z Nismo Rep Power: 9469	GT-R turbos on the VQ37 Finally some free time today. I think I figured out why bank 1 was richer/maf voltage lower. It looks like this clamp wasn't tight enough since I could pull move it with some force. Tightened it to as much as I could without breaking it Also some more pictures since I don't think I've posted these before Steering rack shims/ spacers Steering shaft clearance is about a finger width now. Shouldn't be an issue at all Passenger side. Excuse the messy downpipe haha Tidying things up and looks like I have a small pinhole in the wastegate line! Maybe that's why it goes up to 12 psi. I hope so atleast Also, thanks for the idea whoever posted it here. I tested the wastegates and they open at the same time but the guage isn't very accurate I think since it takes 20 psi to open it all the way. It starts opening around 4-5 psi but the guage is off since it's a cheap $10 pump Edit: just did a pull after making sure there's no boost leaks and it's still at 12 psi and even 13 :/ Good news is my new injectors are working perfectly WOT (60% duty cycle now)but a little weird while idle which is understandable. Notice the boost at 3000rpm Sent from my iPhone using Tapatalk gbrettin, Rusty, Elmo370z and 4 others like this. __________________ Creator of the GTR TT Conversion Kit, NA Record Holder (401WHP) Ecutek Master Tuner (VQ37, VR30, VR38, B58, S55, S58) BTWTuning Last edited by husam2012; 07-31-2017 at 11:56 PM.

08-04-2017, 02:54 PM	#366 (permalink)
husam2012 Track Member Join Date: Mar 2015 Location: Michigan Posts: 549 Drives: 370Z Nismo Rep Power: 9469	The car actually didn't run right with these injectors as they were originally engineereed for the 350z. The replacements are coming in either Saturday or Monday (1050cc)! I'm hoping I will be able to run e85 with them for safety. Car runs perfect otherwise Sent from my iPhone using Tapatalk __________________ Creator of the GTR TT Conversion Kit, NA Record Holder (401WHP) Ecutek Master Tuner (VQ37, VR30, VR38, B58, S55, S58) BTWTuning

08-04-2017, 03:33 PM	#368 (permalink)
husam2012 Track Member Join Date: Mar 2015 Location: Michigan Posts: 549 Drives: 370Z Nismo Rep Power: 9469	Yeah I have the aeromotive 340 which is e85 compatible. Just hoping that running 10-12 psi of boost won't throw my fuel pressure too low. Sent from my iPhone using Tapatalk __________________ Creator of the GTR TT Conversion Kit, NA Record Holder (401WHP) Ecutek Master Tuner (VQ37, VR30, VR38, B58, S55, S58) BTWTuning

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08-04-2017, 02:32 PM	#364 (permalink)
natedog37 Base Member Join Date: Apr 2012 Location: PacNW Posts: 12 Drives: Workin' on it. Rep Power: 13	Good news is my new injectors are working perfectly WOT (60% duty cycle now)but a little weird while idle which is understandable. Great thread! I sub'd right away and am so glad to see your car up and running. I ve been researching Fuel injectors a lot lately for my Powerstroke. One thing I came across was that rebuilt injectors were a having a tough time idling, whereas brand new ones never seems to have that problem. Are yours Rebuilt? I read multiple threads of guys having to switch out individual injectors until they were "balanced" to get their trucks to idle right. Just something to consider. Rock on!