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Old 06-19-2013, 07:23 PM   #181
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I'm just pointing out that fieroguru already explained what would be needed.

It also makes good practice to have spacers so as to not over torque those bolts. Without the spacers, the rail "floats" due to the tension of the rail.

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McMaster.com part # 92510A801 are aluminum spacers 5/8" in length, 3/4" OD and with a 5/16" hole. These work great to mount the LS4 fuel rail to the LS2 intake and cost $2.30 each or less than $10 + shipping. Then you can either run the LS4 injectors with the injector spacers or the longer LS2 injectors w/o spacers.
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I am tuning the LS4 w/ LS2 intake/fuel rail/injector/TB/MAF in my Fiero and wanted to swap back to the the stock LS4 injectors to dial in the MAF upgrade. So with the ebay injector spacers (about $50) and some 5/8" tall spacers (or two 3/8" nuts stacked) the LS4 fuel rail and LS4 injectors bolted into place on the LS2 intake w/o issue.

Click the image to open in full size.
Click the image to open in full size.
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Once you ditch DoD, the LS2 intake/TB/MAF swap is pretty much a bolt together upgrade. Sure the LS6 intake is better, but simple and lower cost have their merits too.
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Old 06-19-2013, 11:21 PM   #182
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Yea but theres a multitude of spacers to choose from on ebay, i just posted the correct ones used after making the mistake of ordering the p.o.s F.A.S.T ones. as for the spacers yea, thats why i mentioned them in my post. The FAST ones go on the bottom of the injector. Not even sure why they sell ones like that. and as for the proper ones i still think there is work to be done on those which is why i made the note to bore out the openings to match the fuel injector openings. There are also other issues i posted about in previous pages..
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Old 06-20-2013, 10:11 PM   #183
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Awesome, I just bought that same valley cover the other day for my ported LS2 swap. Also paid $42-43 shipped for it. Cut off the OPSU bung, tapped the hole, and plugged it with a 3/8 NPT plug.

I'm going to be feeding my OPSU with a 4AN line from the little oil bypass cover on the oil pan by the filter. Just need to pull that and drill/tap it.

Going to use the stock LS4 fuel rails and injectors with the FAST injector spacers. They look to be exactly the right height.

I'm too cheap to pick up an LS2 TB for now though so I picked up some 5/8" aluminum to make an adapter out of.. I just need to find the time to do it and then swap everything on.
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Old 06-20-2013, 10:15 PM   #184
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Hm, while I also dislike the idea of the FAST spacers going on the bottom of the injector, it doesn't seem like many people had problems using them, and I figure I'm just using stock injectors and not expecting to make any sort of big power.

I'm curious to know what you're saying about them not fitting though. They looked to be the exact right height to me.
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Old 06-20-2013, 11:23 PM   #185
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Quote:
Originally Posted by DuronClocker View Post
Hm, while I also dislike the idea of the FAST spacers going on the bottom of the injector, it doesn't seem like many people had problems using them, and I figure I'm just using stock injectors and not expecting to make any sort of big power.

I'm curious to know what you're saying about them not fitting though. They looked to be the exact right height to me.
The link I posted a couple posts above. The reasons the fast ones suck is because they can potentially alter fuel spray pattern And spaces the nozzle farther away from the intake valve. Those parameters are calculated for in the pcm. Long story short just buy the spacers that go on top

Btw the oil bypass can be ordered at improved racing.com
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Old 06-21-2013, 11:20 AM   #186
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I dont like NOT having the keepers on the injectors. I made my own adaptors to incororate the keepers.
The reason FAST designed there adaptors to be under the injector is for satefty and liability. there is a vacuume on the underside of the injector and 60psi of pressure on top of the injector. FAST did not want the blame for a leaky injector adaptor spraying fuel over the top of the engine.

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Old 06-22-2013, 12:00 AM   #187
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Quote:
Originally Posted by 91parkave View Post
Yea but theres a multitude of spacers to choose from on ebay, i just posted the correct ones used after making the mistake of ordering the p.o.s F.A.S.T ones. as for the spacers yea, thats why i mentioned them in my post. The FAST ones go on the bottom of the injector. Not even sure why they sell ones like that. and as for the proper ones i still think there is work to be done on those which is why i made the note to bore out the openings to match the fuel injector openings. There are also other issues i posted about in previous pages..
I'm not talking about the fuel injector spacers.
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Old 06-23-2013, 12:40 AM   #188
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You cannot use a non DOD valley tray with DOD lifters.
Search... Search....Search....

Just a friendly hint. I learned the hard way
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Old 06-30-2013, 10:58 PM   #189
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I am about to do the ls6 intake swap already the intake and tb adp and injectors can i use the fuel rail in the link above?
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Old 07-05-2013, 08:48 PM   #190
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So I started to tear the car apart yesterday figuring I had 4 day weekend and word be a good time to do the swap. Well I gathered the parts and started into it. Then realized I didn't grab my OPSU. Which lead to search and turned up nothing. I have no idea where its at, so I need one. If anyone has a spare let me know.

Edit: I meant DOD sensor, nor OPSU
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Old 08-09-2013, 07:43 AM   #191
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Finally getting the VLOM all welded up and remount mount OPSU for the LS2 intake swap if all goes well this weeknend i should have it all together and tuned.

This was a expensive venture because the first time i got it welded up at the shop the OPSU bung wouldnt clear the LS2's gigantic neck so i had to follow fieroguru's way of things and and cut out the OPSU out the top alltogether and remount it where the oil cooler block off plate is..and then take the VLOM to get rewelded...smh however if you plan on doing a ls2 swap You will need to do something similar, just dont make the same mistake with valley tray (vlom) that i did all the grinding and reworking myself everything inside that oil passage has been smoothed out and worked over for maximum efficency.

here was the first valley tray



reworked it to this









grinded the in the neck to far in and had to patch it. damnit...

[URL="http://s173.photobucket.com/user/91parkave/media/IMG_20130808_201046_zps8ac50833.jpg.html"]




pics of the plate that will be replaced for the OPSU relocation






all done







And just in case y'all needed sizes

Adapter for oil pressure..I had to thread I to 1\4 npt and then use a 1/4 npt to 3/4 npt adapter I found at Lowes in the air compressor fitting section

The Allen head set screw came from ace and is 3/4 by 10 , which is what I used to plug up the dod sensor hole

In case you need to know how I reworked the oil passage I did so with a angle grinder , a 1/2 inch drill bit and a dremel with a metal brush and beveling tool.
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Old 11-03-2013, 11:09 PM   #192
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I swapped an LS4 into my 88 Fiero GT along with the entire drive train and electronics. My contribution to this thread is the LS6 manifold I swapped onto the LS4. You can do this swap with the LS4 components on it. I have seen lots of ways to do this swap but none of them used ALL of the stock LS4 components. So I tried to use as much of the LS4 as possible. WELL, the truth is that I only got the LS6 manifold and did not wont to spend the money on a bunch of other stuff, so I used what I had.
I used the stock LS4 TB, fuel injectors and fuel rail along with ALL LS4 components.
I made all of the swap components myself and it looks basically stock.
I will remake a set of fuel injector spacers because I think these are a little to high.
The LS6 manifold works VERY well with all of the LS4 stuff on it. I had it Dyno tuned with a "cold air intake" and free flowing exhaust system.
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Old 11-05-2013, 10:09 AM   #193
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Can I put all the truck pulleys & stuff on the ls4?
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Old 04-08-2014, 03:03 PM   #194
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so i bought another valley tray just for the sensor and soon found a problem. not all trays and not all sensors are the same. I somehow lost my old sensor so i needed a new one to modify. I didnt know the DOD trays came different so I just bought one on ebay. Well here is what I ended up finding.

old tray on top & right, new on bottom & left





Old sensor type is a straight pin configuration



New pin type is half moon



old solenoids are non-removable



new ones are removable




So I guess my question is which one of these would be the correct one for a 06 LS4? I know this got changed in 05 and 06 from 07 and newer on most LS applications. Im hoping just the new one will work and all I need to do is modify the temp sensor area like I had the other one done and Ill be good to go. Anyone shed some light on this?
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Old 04-08-2014, 03:39 PM   #195
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Quote:
Originally Posted by Dom87SS View Post
so i bought another valley tray just for the sensor and soon found a problem. not all trays and not all sensors are the same. I somehow lost my old sensor so i needed a new one to modify. I didnt know the DOD trays came different so I just bought one on ebay. Well here is what I ended up finding.

old tray on top & right, new on bottom & left





Old sensor type is a straight pin configuration



New pin type is half moon



old solenoids are non-removable



new ones are removable




So I guess my question is which one of these would be the correct one for a 06 LS4? I know this got changed in 05 and 06 from 07 and newer on most LS applications. Im hoping just the new one will work and all I need to do is modify the temp sensor area like I had the other one done and Ill be good to go. Anyone shed some light on this?
G8 DOD valley cover and yes you can use the DOD sensor if you wish.
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Old 04-08-2014, 04:49 PM   #196
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ok that answers that. I'm bit unsure about the sensor thing and how you blocked it off. I was under the impression you need to leave it hooked up or it would run in limp mode. Im a bit lost as to what you did with yours, unless its just tuned out.

secondly, do you think I could remove the board that plugs into each solenoid and just swap it out that really would make my life a whole lot easier?
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Old 04-08-2014, 04:56 PM   #197
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Quote:
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ok that answers that. I'm bit unsure about the sensor thing and how you blocked it off. I was under the impression you need to leave it hooked up or it would run in limp mode. Im a bit lost as to what you did with yours, unless its just tuned out.

secondly, do you think I could remove the board that plugs into each solenoid and just swap it out that really would make my life a whole lot easier?
Taking off the gasket underneath IMO is a neccesary evil, In order to chop the OPSU and reweld at the angle you need to clear the intake neck. The heat from rewelding and debris will get everywhere and possibly destroy the gasket as well, not something id be willing to do for the little work involved. You could use the older one you have as well, since i t has screws and is easily taken apart.

Yes my DOD is tuned out so theres no need for the connector to be in place
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Old 04-08-2014, 05:22 PM   #198
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my tray is already modified for the OPSU. I you look at my first pic you can see its now on an angle pointing out instead of up. The intake neck clears it after a little clearancing I did last year. The DOD solenoid sensor is my worry that it wont fit under the intake so it needs to be modified. What I was wondering is if the long black strip that plug into each solenoid is separatly removable so I could swap my straight sensor board off my G8 tray with the half moon sensor board I just bought. Sorry if this is confusing.
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Old 04-08-2014, 05:38 PM   #199
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Quote:
Originally Posted by Dom87SS View Post
my tray is already modified for the OPSU. I you look at my first pic you can see its now on an angle pointing out instead of up. The intake neck clears it after a little clearancing I did last year. The DOD solenoid sensor is my worry that it wont fit under the intake so it needs to be modified. What I was wondering is if the long black strip that plug into each solenoid is separatly removable so I could swap my straight sensor board off my G8 tray with the half moon sensor board I just bought. Sorry if this is confusing.
i couldnt answer that as i never had reason to take that off when i had mine apart, and its installed on the car now, i know with the old ones you can but not sure about the G8 one, im sure theres a simple solution though.
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Old 04-08-2014, 09:11 PM   #200
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So the board on the solenoids is not removable. So its down to 2 options for me.

1) get a G8 DOD sensor and modify it to use with the already modified tray.

2) modify the new tray and the new sensor.

Ideally I'd like to do #1 but will do #2 if I have to
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Old 04-08-2014, 09:11 PM
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