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-   -   GAGT V2.0 LX9+5spd swap (http://www.grandamgt.com/forum/showthread.php?t=89555)

_HeC_ 10-23-2014 09:59 PM

I had clearance issue's so no way the bolts were going in for the UIM... I've seen a bunch of people run into this same issue while others are perfectly fine, not 100% sure why some fit and others don't

AaronGTR 10-23-2014 11:01 PM

Almost everyone I've seen do the 3500 UIM swap had clearance issues like that. Some didn't have to grind much off though and others had to grind off a lot.

I wonder if people have that problem if they are using the 3500 LIM and heads though? Maybe there's a difference in the position of the injector ports and/or fuel rail bolt down position between the 3400 LIM and the 3500 LIM?

HOYS 10-23-2014 11:13 PM

Quote:

Originally Posted by AaronGTR (Post 1255874)
Almost everyone I've seen do the 3500 UIM swap had clearance issues like that. Some didn't have to grind much off though and others had to grind off a lot.

I wonder if people have that problem if they are using the 3500 LIM and heads though? Maybe there's a difference in the position of the injector ports and/or fuel rail bolt down position between the 3400 LIM and the 3500 LIM?

He is using a LX9 LIM, 04 casting number on it.

I never had an issue with FPR-UIM clearance. Don't snug down the two bolts holding the rail to the LIM. The UIM holds it down pretty well with the LX9 UIM.

sleepyalero 10-24-2014 01:02 AM

Ahhh

99ga 10-24-2014 01:35 AM

Me neither ^

_HeC_ 10-24-2014 07:54 AM

Leaving the bolts loose wouldn't of helped in my case, I pulled/held the rail as close to the front as possible and then snugged it down and was still probably a 1/4" away from UIM bolts going in

*EDIT*
need to get my headers hooked up so did some shopping after work today... all 2.5" and some o2 bungs since my headers for some reason never got drilled for the main o2 sensor but kind of glad as it was designed to only read from the front 3 cylinders so going to move it down to the merge
http://img.photobucket.com/albums/v2...ps9yflhdlb.jpg
http://img.photobucket.com/albums/v2...0506-00315.jpg
headers will be getting sandblasted and POR-20 high heat coating(1400 F)

FixxxerKH202 10-24-2014 03:42 PM

Quote:

Originally Posted by AaronGTR (Post 1255874)
Almost everyone I've seen do the 3500 UIM swap had clearance issues like that. Some didn't have to grind much off though and others had to grind off a lot.

I wonder if people have that problem if they are using the 3500 LIM and heads though? Maybe there's a difference in the position of the injector ports and/or fuel rail bolt down position between the 3400 LIM and the 3500 LIM?


It may have gone to a returnless fuel system with no FPR at the rail. That would certainly slim it down. GM tends to change injectors when they redesign the engines as well so you may have a slightly different injector design on the 3500 also.

G.I.Ceo 10-24-2014 05:57 PM

Quote:

Originally Posted by AaronGTR (Post 1255874)
Almost everyone I've seen do the 3500 UIM swap had clearance issues like that. Some didn't have to grind much off though and others had to grind off a lot.

I wonder if people have that problem if they are using the 3500 LIM and heads though? Maybe there's a difference in the position of the injector ports and/or fuel rail bolt down position between the 3400 LIM and the 3500 LIM?

I used a stock 3400 fuel rail with 60lb injectors on a 3500 sway. 3400 bottom with 3500, heads, LIM, and UIM and I never ran into any clearance issues. The only thing is that the FPR sits really snug against the UIM and I'm usin a old school Casper AFPR.

AaronGTR 10-24-2014 08:23 PM

Quote:

Originally Posted by FixxxerKH202 (Post 1255902)
It may have gone to a returnless fuel system with no FPR at the rail. That would certainly slim it down. GM tends to change injectors when they redesign the engines as well so you may have a slightly different injector design on the 3500 also.


Nope, the first gen 3500 that was based on the 3400 had a fuel return system same as the 3400. There was a later 3500 that was based off the 3900 and I'm not sure what that used for a fuel system, but none of the parts from that engine are interchangeable.


Quote:

I used a stock 3400 fuel rail with 60lb injectors on a 3500 sway. 3400 bottom with 3500, heads, LIM, and UIM and I never ran into any clearance issues. The only thing is that the FPR sits really snug against the UIM and I'm usin a old school Casper AFPR.
You'd be one of the few I've ever heard of that didn't have issues. Almost everyone else did, especially when they first started doing the swaps. Maybe the caspers FPR has something to do with it? Might have a smaller diameter... I don't think it has the same flange running around the outside that the stock one does... don't remember off hand.

FixxxerKH202 10-25-2014 10:58 PM

Quote:

Originally Posted by AaronGTR (Post 1255907)
Nope, the first gen 3500 that was based on the 3400 had a fuel return system same as the 3400. There was a later 3500 that was based off the 3900 and I'm not sure what that used for a fuel system, but not of the parts from that engine are interchangeable.

Oh alright, just throwing it out there because GM converted most vehicles to a returnless system in 2006 so I figured the 3500 may have been one of them. That's a good thing though, if you go boosted return systems are much easier to get the fuel flow needed. My colorado is a pain in the ass because the fuel pump starts dropping off under WOT with the larger injectors I'm running for the blower.

_HeC_ 10-26-2014 12:05 PM

my LX9 is from a 2006 and no return line on it, I didn't think any of them had a return line lol
http://img.photobucket.com/albums/v2...psaokiugwg.jpg

HOYS 10-26-2014 03:12 PM

They are all return less.

AaronGTR 10-26-2014 09:52 PM

huh, I coulda swore the first gen 3500 still had a return system. :confused:

domestikdemon 11-03-2014 11:05 AM

Quote:

Originally Posted by AaronGTR (Post 1255907)
Nope, the first gen 3500 that was based on the 3400 had a fuel return system same as the 3400. There was a later 3500 that was based off the 3900 and I'm not sure what that used for a fuel system, but not of the parts from that engine are interchangeable.

Later 3500 you speak of is an LZ4 and is a VVT motor. 3900 is the LZ9 and is very different internally than the LZ4. Newer model GM's with electronic TB are running a CAN system and returnless injection.

_HEC_ it's looking great!

AaronGTR 11-03-2014 09:46 PM

Quote:

Originally Posted by domestikdemon (Post 1256187)
Later 3500 you speak of is an LZ4 and is a VVT motor. 3900 is the LZ9 and is very different internally than the LZ4. Newer model GM's with electronic TB are running a CAN system and returnless injection.

_HEC_ it's looking great!


eh, pretty sure it's not. The LX9 3500 was based on the LA1 3400, but the 3500 LZ4 (and the E85 LZE) were both still pushrod engines and they both shared the same 99mm bore with 3900 LZ9 motor, just with a different stroke. All three engines also shared the same cam phasor system for altering the intake/exhaust valve timing simultaneously with a cam in block setup, which would pretty much require the same block and timing cover. ;) I'm pretty sure I read that somewhere on 60degreeV6.com (that they were related), and looking at GMmediaonline it appears that way. Unless you've got something that says otherwise?

_HeC_ 11-09-2014 02:24 PM

this thread needs some updates but for now I'll just leave this here
http://img.photobucket.com/albums/v2...psuqlirj5q.mp4

starter wont crank with the key right now, ran a wire to the starter solenoid and had someone turn the key as I put the wire to the battery to get it's first breath of fresh air!

_HeC_ 11-10-2014 10:59 PM

my sandblaster wasn't cooperating with me so ended up sanding majority of my headers by hand :(
http://img.photobucket.com/albums/v2...psdwoatmnn.jpg
POR-20
http://img.photobucket.com/albums/v2...pstnccvjfl.jpg
clearance issue's with my headers and T-stat housing
http://img.photobucket.com/albums/v2...psqdoz7ohr.jpg
needed to notch my battery tray to get it to fit with the CAI, also running W-body plug wires for anyone curious on how I routed them under the UIM
http://img.photobucket.com/albums/v2...pscpx2f47r.jpg
LX5 TB worked great for my vac lines
http://img.photobucket.com/albums/v2...psydmsfcwn.jpg
making my TB bracket and just wondering how much slack if any should there be on the cable? and to anyone running the LX5 tb did you drill the hole out on the TB to accept the TB cable or grind it down slightly to fit in?
http://img.photobucket.com/albums/v2...psqc033heh.jpg
and the start to my downpipe, going to move the flex closer to the flange... easiest DP ever with those S&S headers lol
http://img.photobucket.com/albums/v2...psygyho0uv.jpg

TDavis 11-10-2014 11:12 PM

Which headers?

_HeC_ 11-10-2014 11:21 PM

S&s

AaronGTR 11-11-2014 08:46 AM

Looks good.

That gray vacuum tube on the TB, the 90 looks a little stressed/bent backward. Might want to be careful with that. It will end up splitting over time as the rubber gets heat cycled.


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