Blown Motor, Engine Rebuild/Replacement.

phunk

One thing that is funny is that in that long post i totally disregarded the fact that the 370z is a returnless fuel car from the factory... so this makes the restrictions in the fuel plumbing a compounding issue. Since the pressure is being regulated inside the fuel pump housing, the regulator doesnt even allow you to squeeze the most out of your pump because its essentially being volume regulated.

with a return system where the regulating is done off the rails, the regulator will at least allow the volume to increase to everything the pumps got!

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COSMO

Hmm I wonder who might be selling a fuel return system... lol

phunk

I only make them cause ya need them!

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COSMO

My engine/crank, etc are going into the cryo machine today!!!!

COSMO

I may have a potential member selling his gtm fuel return system/fuel rails and wanted to see who else has this setup? Pros and cons...

Ron

Cons: is not CJM's. Just sayin'

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2011 Twin Turbo PW nismo #113 - My Journal - My TT Build Thread
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COSMO

I understand but CJM is not what this thread is about...

elperuano

Well...
Pros : seems to work on few built cars. For the right price why not?
Cons : if you ever need help or replacement parts from gtm, well you know how that process will play out. Also CJM make top notch parts at waaaaaay better price.

COSMO

Yeah good point there... Would it really be worth the price considering gtm's customer service these days.. Not even sure if the gtm system has fuel dampers either...

Nissan370

the down fall of all good companies poor customer service.
its the biggest turn off

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370z vsr motorsports single turbo/built motor 9.1cr 525rwhp/450rwtq @ 10.5psi (stock maf maxed out)

SharpByCoop

I'm the guilty party. I gave cosmogirl an offer on my system, and I'm sure it will move at my asking no matter what he decides. It's OK one way or another. He can show the images and tell of the deal if he wants.

However, I just looked at that system: GTM has little need for followup involvement outside of the billet rail, which isn't a moving part: 775 Bosch injectors, Aeromotive 340 lph pump, AN braided fuel lines, and a gauge with the pressure regulator from another supplier, all included, still far less than the CJM product.

Educate me: Doesn't the regulator act as a fuel damper as well?

Lastly, I know of the GTM turbo thread and that quagmire. However, I have always gotten prompt service from them when I called. You have to call. Sam has always gone the extra mile for me.

Coop

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COSMO

Coop Iam going to give you a call here in a bit about the setup since Iam still interested.. In the mean time here are a few pics from vsr. The heads were rebuilt and resealed, pressure tested and vacuum tested. The pic of the motor is right before going into the cryo machine..

Attached Images

	Heads.jpeg (148.4 KB, 44 views)
	20140204_122246.jpeg (196.8 KB, 45 views)

1slow370

no need for fuel dampers on a returnless system since our cars don't have an issue with it. subarus develop a lean spot at a specific rpm range if they dont have enough lines or damper. braided line also expands and acts as a damper as well so when you add a -6/-8 supply line you are adding one giant damper. lots of guys are running rails with no dampers and not having an issue, it only matters when you have a lean spot that can't be tuned out and always develops at the same rpm, usually on the cylinder furthest from the inlet on the rail, which can also be caused by not enough pressure or pump. returnless it is a bigger issue

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Chuck33079

Phunk's testing absolutely showed the need for a damper.

edit- and now I can't seem to find the post that explained it in detal.

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COSMO

Ok so I'm going to play devil's advocate here.. I really don't think gtm would create and build a fuel system that would fail. Meaning, if it needed dampers it would have them if not it's not necessary. Coop ran this on his car with no problems. What are the chances of sam chiming in here. lol