lz9 3900 V6 buildup
Moderators: The Dark Side of Will, Series8217
- Shaun41178(2)
- Posts: 8374
- Joined: Fri Nov 19, 2004 7:12 pm
- Location: Ben Phelps is an alleged scammer
Re: lz9 3900 V6 buildup
Turbo mounting is figured out.
-
- Peer Mediator
- Posts: 15630
- Joined: Wed Nov 24, 2004 11:13 pm
- Location: In the darkness, where fear and knowing are one
- Contact:
Re: lz9 3900 V6 buildup
Olive drab compressor housing... reusing the same turbo from last time?
- Shaun41178(2)
- Posts: 8374
- Joined: Fri Nov 19, 2004 7:12 pm
- Location: Ben Phelps is an alleged scammer
Re: lz9 3900 V6 buildup
Yes same turbo. Compressor housing matches the car
-
- Posts: 2831
- Joined: Mon May 24, 2010 5:34 pm
- Location: Aiken, SC
Re: lz9 3900 V6 buildup
not really a fan of the trunk blowout, as it removes some street manners from the car. I think it would have been simple enough to split the stock crossover and put the turbo there. that would require some modification of the rear manifold, but I imagine they are cast steel like the LSX manifolds and easy enough to weld without cracking problems, but that's just a guess.
That being said, it's your car, do as you please.
That being said, it's your car, do as you please.
"I am not what you so glibly call to be a civilized man. I have broken with society for reasons which I alone am able to appreciate. I am therefore not subject to it's stupid laws, and I ask you to never allude to them in my presence again."
- Shaun41178(2)
- Posts: 8374
- Joined: Fri Nov 19, 2004 7:12 pm
- Location: Ben Phelps is an alleged scammer
Re: lz9 3900 V6 buildup
Yea, I thought about it for months before I cut it. Also why I tried to cut so little. I looked for lz9 exh flanges to make my own trunk side manifold but had no luck finding a set. I too would have preferred to keep the turbo in the engine compartment.
Modifying the trunk side manifold with a block off plate to put the turbo on the crossover would work but the flow would be terrible. Big reversion problems. If the goal was only 350 hp no problem with doing that.
Modifying the trunk side manifold with a block off plate to put the turbo on the crossover would work but the flow would be terrible. Big reversion problems. If the goal was only 350 hp no problem with doing that.
-
- Posts: 610
- Joined: Thu May 20, 2010 10:07 pm
- Location: Grand-Mère, QC
Re: lz9 3900 V6 buildup
Someone who really wants the top fit/finish could build a doghouse for this, like on a van.
My uncle used to have an Econoline, and it was supposedly one of the easiest vehicles to change the spark plugs on (says my dad).
My uncle used to have an Econoline, and it was supposedly one of the easiest vehicles to change the spark plugs on (says my dad).
-
- Posts: 2831
- Joined: Mon May 24, 2010 5:34 pm
- Location: Aiken, SC
Re: lz9 3900 V6 buildup
I think I would try flipping the turbo upside down first, that may bring the assembly below the flange that seperates the trunk halves, and he may be able to put a single flat piece in. That would provide a ton more function than a dog house IMO.pmbrunelle wrote: ↑Sat May 23, 2020 12:56 pm Someone who really wants the top fit/finish could build a doghouse for this, like on a van.
My uncle used to have an Econoline, and it was supposedly one of the easiest vehicles to change the spark plugs on (says my dad).
"I am not what you so glibly call to be a civilized man. I have broken with society for reasons which I alone am able to appreciate. I am therefore not subject to it's stupid laws, and I ask you to never allude to them in my presence again."
- Shaun41178(2)
- Posts: 8374
- Joined: Fri Nov 19, 2004 7:12 pm
- Location: Ben Phelps is an alleged scammer
Re: lz9 3900 V6 buildup
I did a mock up for yhose people that are gonna do a 7730 swap or a standalone engine swap of how the engine looks in the bay.
This is. A truck 75mm tb. Its 4" od. It clears the stock getrag shift cable.
This is. A truck 75mm tb. Its 4" od. It clears the stock getrag shift cable.
-
- Posts: 2831
- Joined: Mon May 24, 2010 5:34 pm
- Location: Aiken, SC
Re: lz9 3900 V6 buildup
FWIW, the LS4 throttle is a direct bolt on to the LZ4 intake manifold. It is a DBW unit though, so it will require a stock ECU or something like the DBWX2 like I am using with my MS3.
"I am not what you so glibly call to be a civilized man. I have broken with society for reasons which I alone am able to appreciate. I am therefore not subject to it's stupid laws, and I ask you to never allude to them in my presence again."
- Shaun41178(2)
- Posts: 8374
- Joined: Fri Nov 19, 2004 7:12 pm
- Location: Ben Phelps is an alleged scammer
Re: lz9 3900 V6 buildup
I modified my stock fuel rail. Gm had the rail turned 180 from how I am running mine. The input to the rail was on the TB side. I flipped my rail to sit on the pass side like factory. I modded the rail. I cut off the portion that turns up, I used a -6an compression fitting for my input.
- Shaun41178(2)
- Posts: 8374
- Joined: Fri Nov 19, 2004 7:12 pm
- Location: Ben Phelps is an alleged scammer
Re: lz9 3900 V6 buildup
Here is how I am running my coolant. Two -12 to a fill tank. There is also a -8 that feeds the heater core.
-
- Posts: 2831
- Joined: Mon May 24, 2010 5:34 pm
- Location: Aiken, SC
Re: lz9 3900 V6 buildup
I'm having flashbacks of the stuff I did to my car! LOL.Shaun41178(2) wrote: ↑Fri May 29, 2020 12:43 am Here is how I am running my coolant. Two -12 to a fill tank. There is also a -8 that feeds the heater core.
20200529_000335.jpg
20200529_000348.jpg
on a more serious note, it's looking good. I think I would have made a coolant crossover pipe from one head to the other, then ran a single line to the tank, but that's me.
"I am not what you so glibly call to be a civilized man. I have broken with society for reasons which I alone am able to appreciate. I am therefore not subject to it's stupid laws, and I ask you to never allude to them in my presence again."
-
- Posts: 469
- Joined: Wed Aug 08, 2007 11:08 am
Re: lz9 3900 V6 buildup
Should do twins now that you’ve opened up all that space.
With all the LS builds going on now, this is refreshing
With all the LS builds going on now, this is refreshing
- Shaun41178(2)
- Posts: 8374
- Joined: Fri Nov 19, 2004 7:12 pm
- Location: Ben Phelps is an alleged scammer
Re: lz9 3900 V6 buildup
Twin turbos would be tight, add complexity too but I think its not impossible. More than I wanted to tackle at this time however.
Coolant system is done.
-12 out of each head
-8 to the heater core.
I'll prob tackle the fuel lines next.
Coolant system is done.
-12 out of each head
-8 to the heater core.
I'll prob tackle the fuel lines next.
-
- Posts: 610
- Joined: Thu May 20, 2010 10:07 pm
- Location: Grand-Mère, QC
Re: lz9 3900 V6 buildup
You still have a tank up front by the radiator, right?
This one you built looks to make for a convenient fill location, but too small to handle the expansion/contraction of the coolant.
This one you built looks to make for a convenient fill location, but too small to handle the expansion/contraction of the coolant.
- Shaun41178(2)
- Posts: 8374
- Joined: Fri Nov 19, 2004 7:12 pm
- Location: Ben Phelps is an alleged scammer
Re: lz9 3900 V6 buildup
Yea I still have the overflow up by the radiator. The rear is similar to the original thermostat fill point. This is the highest point in the system.
Working on the wiring. Nearly have it finished. Then I can loom it. It will almost be nearly hidden when its complete.
Working on the wiring. Nearly have it finished. Then I can loom it. It will almost be nearly hidden when its complete.
FieroPhrek working on that ls4 swap for 18 years and counting now. 18 years!!!!! LOL
530 whp is greater than 312
530 whp is greater than 312
-
- Peer Mediator
- Posts: 15630
- Joined: Wed Nov 24, 2004 11:13 pm
- Location: In the darkness, where fear and knowing are one
- Contact:
Re: lz9 3900 V6 buildup
Looking good!Shaun41178(2) wrote: ↑Wed Aug 05, 2020 7:54 pm Yea I still have the overflow up by the radiator. The rear is similar to the original thermostat fill point. This is the highest point in the system.
However, since the hoses from the heads to the tank are lower in the middle than the ends, you'll still need an air bleed on top of the engine in order to burp the cooling system.
-
- Posts: 610
- Joined: Thu May 20, 2010 10:07 pm
- Location: Grand-Mère, QC
Re: lz9 3900 V6 buildup
While everyone is laughing at the computer + electronics you're putting on this engine, it does make for a slim wiring harness!
-
- Peer Mediator
- Posts: 15630
- Joined: Wed Nov 24, 2004 11:13 pm
- Location: In the darkness, where fear and knowing are one
- Contact:
Re: lz9 3900 V6 buildup
Notice what's missing from the last photo, though...pmbrunelle wrote: ↑Thu Aug 06, 2020 6:33 pm While everyone is laughing at the computer + electronics you're putting on this engine, it does make for a slim wiring harness!
- Shaun41178(2)
- Posts: 8374
- Joined: Fri Nov 19, 2004 7:12 pm
- Location: Ben Phelps is an alleged scammer
Re: lz9 3900 V6 buildup
Wiring is.pretty much done other than some clean up in the cabin.
Wiring routes next to the heads on the drivers side. Only bits visible is the loom to the tos, coilpacks, and map sensor on the back of the intake. Its a mini tuck I guess but its.clean.
Wiring routes next to the heads on the drivers side. Only bits visible is the loom to the tos, coilpacks, and map sensor on the back of the intake. Its a mini tuck I guess but its.clean.