Engine Build

Isamu · 04-07-2013, 04:51 PM

hey man, pm me.. I have some questions and stuff.. I have some things that need doing

esfourteen · 04-07-2013, 05:07 PM

Quote:

Originally Posted by Ron

A little late to the party, congrats on the build! Everything looks amazing. I am getting ready to start mine too and I am getting tons of info from this, Digi's and Mr.Squeeze's threads.

What coatings did you use on the pistons? Did you do anything to the rods? Sorry if you already mentioned it and I missed it.

Thanks Ron, honestly I don't know what specific coating was used as the machine shop took care of it directly, but I can find out for you. I didn't do anything to the rods at all.

I finally got to put it on the dyno and saw I was quickly running out of fuel up top past ~530whp. We ended up installing an aeromotive 340lph pump and a fuel return kit from CJM, didn't hook up a vacuum source to the regulator but right now I have plenty of fuel (needs a retune), put down 561hp/550tq at ~12psi.

roplusbee · 04-07-2013, 05:33 PM

Quote:

Originally Posted by esfourteen

Thanks Ron, honestly I don't know what specific coating was used as the machine shop took care of it directly, but I can find out for you. I didn't do anything to the rods at all.

I finally got to put it on the dyno and saw I was quickly running out of fuel up top past ~530whp. We ended up installing an aeromotive 340lph pump and a fuel return kit from CJM, didn't hook up a vacuum source to the regulator but right now I have plenty of fuel (needs a retune), put down 561hp/550tq at ~12psi.

Nice numbers. Which injectors did you end up with? I may follow your motor build as well. Omar@UPREV suggested that I use a shop in SanAntonio that he uses for all of their VQ customers.

Damn........Ron beat me to it again......lol.

Ron · 04-07-2013, 06:38 PM

Quote:

Originally Posted by esfourteen

Thanks Ron, honestly I don't know what specific coating was used as the machine shop took care of it directly, but I can find out for you. I didn't do anything to the rods at all.

I finally got to put it on the dyno and saw I was quickly running out of fuel up top past ~530whp. We ended up installing an aeromotive 340lph pump and a fuel return kit from CJM, didn't hook up a vacuum source to the regulator but right now I have plenty of fuel (needs a retune), put down 561hp/550tq at ~12psi.

Thanks Nick! Good too know about the fuel return system, thanks for sharing. That tq number is really high! What exhaust are you running? are you peaking at low rpms and then falling down?

Quote:

Originally Posted by roplusbee

Nice numbers. Which injectors did you end up with? I may follow your motor build as well. Omar@UPREV suggested that I use a shop in SanAntonio that he uses for all of their VQ customers.

Damn........Ron beat me to it again......lol.

I haven't started Rob. I am on the researching phase, that takes a while. You can still beat me lol.

esfourteen · 04-07-2013, 06:48 PM

Quote:

Originally Posted by Ron

Thanks Nick! Good too know about the fuel return system, thanks for sharing. That tq number is really high! What exhaust are you running? are you peaking at low rpms and then falling down?

yup, its basically a back pressure issue. I have the .86 AR housings, berk test pipes and AAM 2.5" exhaust. I'm going to see what we can do with tuning before upgrading the exhaust though.

GaleForce · 04-07-2013, 06:50 PM

Now I'm thinking I should do a FRS sooner than later.

esfourteen · 04-07-2013, 06:54 PM

Quote:

Originally Posted by roplusbee

Nice numbers. Which injectors did you end up with? I may follow your motor build as well. Omar@UPREV suggested that I use a shop in SanAntonio that he uses for all of their VQ customers.

I'm running bosch EV-14 650cc injectors right now, but I have a set of DW 850cc going in soon.

Ron · 04-07-2013, 06:55 PM

Quote:

Originally Posted by esfourteen

yup, its basically a back pressure issue. I have the .86 AR housings, berk test pipes and AAM 2.5" exhaust. I'm going to see what we can do with tuning before upgrading the exhaust though.

I figured that's what it was. Must be a real kick in the butt, all that torque down low, helloooo wheelspin!

esfourteen · 04-07-2013, 06:56 PM

Quote:

Originally Posted by GaleForce

Now I'm thinking I should do a FRS sooner than later.

probably a good idea, but I'd be curious to see how far a hardwired aeromotive 340 pump would go before running out up top.

Ron · 04-07-2013, 06:56 PM

Quote:

Originally Posted by GaleForce

Now I'm thinking I should do a FRS sooner than later.

nah man, don't get a scion!

GaleForce · 04-07-2013, 06:57 PM

Quote:

Originally Posted by Ron

nah man, don't get a scion!

GaleForce · 04-07-2013, 07:01 PM

Quote:

Originally Posted by esfourteen

probably a good idea, but I'd be curious to see how far a hardwired aeromotive 340 pump would go before running out up top.

I thought you tried that already?

esfourteen · 04-07-2013, 07:04 PM

Quote:

Originally Posted by GaleForce

I thought you tried that already?

nope I only had a walbro 255 hardwired, the aeromotive might be enough depending on HP goals

Ron · 04-07-2013, 07:04 PM

I think the issue is the 650cc injectors. Not the pump or the lack of a return system. I am on the same 650cc injectors and they were close to maxing out at 530ish rwhp. Wonder what the result would be with the 255lph and say 850cc injectors.

esfourteen · 04-07-2013, 07:07 PM

Quote:

Originally Posted by Ron

I think the issue is the 650cc injectors. Not the pump or the lack of a return system. I am on the same 650cc injectors and they were close to maxing out at 530ish rwhp. Wonder what the result would be with the 255lph and say 850cc injectors.

its possible its related but FI ran into the same issue around 550whp, they had to compensate by adding more fuel up top

04-07-2013, 06:50 PM	#66 (permalink)
GaleForce A True Z Fanatic Join Date: Aug 2011 Location: Ontario, Canada Posts: 21,749 Drives: Varis Arising II Rep Power: 51866	Now I'm thinking I should do a FRS sooner than later. __________________ >>>GaleForce's Build<<< >>>FaceBook @3GsCustoms<<<>>>Instagram @GaleForce370z<<< Varis Kamikaze-Z

04-07-2013, 07:04 PM	#74 (permalink)
Ron A True Z Fanatic Join Date: Oct 2010 Location: Houston, TX Posts: 3,009 Drives: TT '11 PW Nismo #113 Rep Power: 23	I think the issue is the 650cc injectors. Not the pump or the lack of a return system. I am on the same 650cc injectors and they were close to maxing out at 530ish rwhp. Wonder what the result would be with the 255lph and say 850cc injectors. __________________ 2011 Twin Turbo PW nismo #113 - My Journal - My TT Build Thread [ GTM GTX Stg2 TT \|\| HKS EVC6 \|\| Custom CarPC \|\| F.I 3'' TDX CBE \|\| SB 6puck clutch/ZSpeed CSC \|\| BC BR Coilovers \|\| SPC camber arms \|\| Work VSS-X \|\| Custom Headlights \|\| PW:JDM CF Covers \|\| Seibon CF Engine Cover ]

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
GTM Performance Engineering: VQ37VHR Engine Build 700HP Power Package	SAM@GTM	Forced Induction	73	10-12-2012 09:46 AM
engine build time	Nissan370	Forced Induction	42	08-05-2012 09:48 AM
370Z For Sale WTB: wrecked 370z with working engine... or engine	travisjb	370Z For Sale	0	01-15-2012 11:47 AM
Pic request: 370z engine bay w/stillen g3's and Seibon engine cover.	atx370z	Nissan 370Z Photos / Spyshots / Video / Media Gallery	20	01-05-2011 12:50 PM
Datsun Roadster 1600...To build or not to build	motoextreme	The Lounge (Off Topic)	66	02-13-2010 12:40 AM