1992 Z32 300ZX LSx swap. - TennSpeed
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Old 11-28-2009, 11:27 AM   #1
jshull
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1992 Z32 300ZX LSx swap.
Well, here it is I guess. I'm still stacking parts but the build is up and running.

I have a 1992 Z32 that used to have a TT swap in it but the previous owner dropped the #6 piston in. I ended up trading my turbo civic for this and a ratty del sol that I daily at the moment.

My plans are to get the LQ4 (300hp/370tq) that I sourced from a 2002 Chevy 2500HD mated to my stock 5 speed from the old TT swap and all that good stuff.

I have the wiring figured out I think...I wired up a separate fuse box and relays to control the ignition power and fuel pump (bypassing the stock fuel controller but keeping the stock TT pump for the time being) I built a small sub harness to plug the truck EFI harness into the Z's chassis harness. I will try and get a simple diagram up soon to show everyone what I am talking about.

Not useful for me but I know there are some other Z guys on here that will use this:



Also, this helped me track down what wires went to the relays/chassis and is the factory diagram for the Z:

http://i50.photobucket.com/albums/f3...tiv/VG-EFI.jpg

Here are some of the sites that helped me out immensely with the wiring:

http://pirate4x4.com/forum/showthrea...=798904&page=3
http://forums.nicoclub.com/zerothread/225172
http://www.lt1swap.com/

As far as mounting goes I ordered a set of universal street rod mounts from summit that look like they will do the trick:



Trans-dapt part # 4501

I'm figuring I can cut the legs down and put a plate on the end with a wheel studd so it can kind of act like the old factory Z mounts mounting in the subframe.

I also have picked up a new oil pan so the motor can sit a little lower and farther back:



Moroso 20140 (oil pan)
Moroso 24050 (pickup)
GMPP 12558253

I haven't hammered out the oil filter relocation just quite yet but will update when I do.

As far as my flywheel/clutch issues I have a stock LS1 fly wheel from a F-body Camaro that has the correct bolt pattern for my engine. I am getting it turned down at a machine shop and having the Z's old ring gear installed on it as well as the old dowels and all of the pressure plate mount holes transferred over. I am losing about a 1/4in on each side of contact space for the clutch because of the way the LS1 flywheel has a wider space in the center. (will get reference pics when I can get out to the shop again)

Here's a little teaser of the wiring madness I went through...



Also, a pic of the Z and my old Civic (94_teggyLs here on the boards has it now)




Last edited by jshull; 02-24-2011 at 11:37 PM..
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Old 11-28-2009, 01:11 PM   #2
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Bad Ass. How much did the engine run ya?
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Old 11-28-2009, 03:39 PM   #3
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nice
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Old 11-28-2009, 04:17 PM   #4
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your going to love the clearance between the cross member and the pan with that new oil pan.. there is all of 2 inches with the TT motor lol.. that ecu pin out if a great thing to have also.. most pin outs just have the numbers and a description of what the wires are.. having the colors of the wires helps out a lot.. i do have a couple of questions for ya though.. did you already get rid of all the twin turbo stuff you had?? (if not i may know someone who may be interested in picking some of it up) and.. Wanna trade chassis?? lol my white 2+2 for your black one?? hahah
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Old 11-28-2009, 04:51 PM   #5
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good luck man should be a fun build!
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Old 11-28-2009, 11:18 PM   #6
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Quote:
Originally Posted by SmokeyThaLo View Post
Bad Ass. How much did the engine run ya?
I picked it up from a local yard for $1k even, it included the engine (no alt, PS pump), wiring harness, ecu, MAF. Not too shabby and has something like 80k on it. I was looking at a LY6 (353hp/373tq) but it was a little bit out of my price-range and I didn't want the headache of getting the VVT to work.

Quote:
Originally Posted by TT Fairlady Z View Post
your going to love the clearance between the cross member and the pan with that new oil pan.. there is all of 2 inches with the TT motor lol.. that ecu pin out if a great thing to have also.. most pin outs just have the numbers and a description of what the wires are.. having the colors of the wires helps out a lot.. i do have a couple of questions for ya though.. did you already get rid of all the twin turbo stuff you had?? (if not i may know someone who may be interested in picking some of it up) and.. Wanna trade chassis?? lol my white 2+2 for your black one?? hahah
Haha yea. I will post up a few threads I found about clearance with these motors. From what I can tell the biggest issue is at the firewall when people use the T56. The bellhousing is just so damn big. I hoping to not have to worry about that with the reuse of my stock TT tranny. Yea, I dug that diagram out of the twinturbo.net archives (I HATE HATE HATE the way that forum is layed out. So gay.) I'm hoping to make a few of these kits when I am done to mount Gen III/IV motors into Zs with the stock tranny.

As far as the TT stuff, I have every bit of it down to the charge pipes and stock intercoolers. The block is semi torn down with piston 6 out. Surprisingly the broken ringlands didn't damage the cylinder walls at all.

I have found an LS1 mani from some Vette/Maro or whatever with rails and injectors for $50 locally so I won't have any hood clearance issues. I'm planning on going with a set of Fast fuel rails and larger injectors. (I have some future plans of boost )

Also a question for those on the boards: Does anyone know of anybody locally who could tune my setup when I am done? I may send out for a map so I can at least start it and get that stuff ironed out, VATS is a bitch)
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Old 12-05-2009, 06:49 PM   #7
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you could always take it to the guy who rebuilt my Z.. his name is mike petralia.. he wanted to do a swap like this in my car but i wanted the vg.. his usually does work on those kinda motors.. and he would be suprised if you rolled up in a z with that swap hahaha shoot me a txt if you want his number
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Old 12-06-2009, 01:11 AM   #8
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Well, been a little while with the update.

I got the intake manifold from my friend. I crossed the numbers and injectors and it's a manifold from a 98 Camaro. The fuel rails aren't going to work because of clearance issues with the lines hitting the coils.



I started looking into what options I have for my fuel situation and have come up with what I think will work pretty well. I have the TT pump in my car from the TT swap it had before and from what information I could dig up it's somewhere in the neighborhood of 290lph (13.5v) so I think I'm good in that department.

I was going to try and get a set of adapters to make the stock rails from the LS1 fit but found out the FPR was missing off of the rails so I started looking around and came up with a fuel filter from a 99-04 LS1 that has an internal FPR built in that sets fuel at 58psi and was cheap (Napa part# 3737, $50.00)

The filter has a pressure inlet, return side, outlet.



Some parts you are going to need if you want to connect rubber hoses to it (cheap):

3/8" (pressure): DOR-800-121
5/16" (return): DOR-800-120

You can get those fittings from any auto parts store and are fairly cheap. To get a line out of the outlet you have to get a fitting from russel which effectively turns the oulet to a 3/8 NPT fitting or hit the junkyard and grab a line off a late model Chevy and make your own fitting.

Russel Part numbers if AN fittings are your thing:

3/8 tube -> 3/8 NPT: 640690
3/8" -> -6an: 640850
5/16"-> -6an: 640860

I found a fuel rail kit from Professional Products that I plan on using (part#10612) it includes rails, crossover, line that goes to the fuel filter.

I'm also intalling a set of Bosch 0280155811 (42lb @ 58psi) injectors. It's a bit overkill for a cam/headers/intake car but gives me a bit of room to grow later.

Research I've been doing for my PCV setup since the manifold changes everything. I'm plugging up the old PCV hole in the driverside valve cover and running something similar to this setup (GO GO LS6 valley pan!):



Also, I found this vacuum routing diagram I figure is good for reference.

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Old 12-06-2009, 11:07 AM   #9
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Wow awesome build.
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Old 12-06-2009, 12:23 PM   #10
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As uch as I HATE working on a TT Z32, this is going to be one AWESOME build up. I definately wanna keep track of this one.

Lookin good so far man... when's the "expected" timeframe for it to be on the road?
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Old 12-06-2009, 12:34 PM   #11
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Well, ideally, I want to have it up at the end of January or early February.

As soon as I can get my flywheel cut down and setup for the Z clutch I should be able to start fabbing up the adapter plate. I have the steel just need to make sure it is going to do the trick when the flywheel and clutch are bolted on.

I think I have most everything figured out so far except the headers. I'm pretty sure a set of block hugger headers will fit with everything in but they aren't going to cover what I want performance wise.

I found this kit that I may try and put together to make it fit:

http://www.speedwaymotors.com/Chevy-...Kits,6600.html
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Old 12-06-2009, 12:48 PM   #12
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wow lookin good cant wait to see this thing up an runing
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Old 12-06-2009, 05:13 PM   #13
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we are actually doing the same thing with an lm7 in my dads 39 ford
we are using the same intake mani and fuel rail i have already modified the coil packs to where the fuel inlet will clear the coil pack on cylinder # 5 we are using a street and performance wiring kit and also using their pulley kit. prolly gonna have carma retune the ecu to get rid of the vats. but will be a fun build non the less heres a link to their website they deff know their stuff http://www.hotrodlane.cc/
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Old 01-09-2010, 08:51 PM   #14
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been over a month.. any updates??
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Old 02-09-2010, 11:52 AM   #15
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Haven't been able to work on the car for a bit.

I've got some money saved, but my biggest snag is I've had to help some friends out of hardtimes so the car got put on hold.

Hopefully, within the next month I can go ahead and get my adapter plate made so I can get the engine at least in and figure out my driveshaft situation and all that good stuff.

I have decided not to go with fuel injection just to keep the project simple. I've decided a carb'd Lq4 is probably the way to go and with a decent cam will get me in my 4-500hp range. More pics and updates coming soon.
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Old 02-09-2010, 06:20 PM   #16
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I demand a ride when it's done
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Old 02-09-2010, 06:32 PM   #17
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Awsome!
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Old 02-09-2010, 07:07 PM   #18
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No.

But it's not my car so good luck with the build!
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Old 02-10-2010, 12:59 AM   #19
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I'd gladly give anyone a ride if I was in town for a meet or something haha.

Update:

Ordered my clutch from Southbend, also ordered an engine cradle stand so I can mock up my adapter plate and hopefully have one CNC cut soon.

We need heat in our shop so bad. I may have to breakdown and get the gas turned on.
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Old 02-10-2010, 01:14 AM   #20
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oh damn im sure mfg will be in here to nutswing the southbend clutch. Seems every time a clutch issue comes up he always tells me about southbend haha. GL need to get some pictures up when pregress comes.
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