Lsx/4+3 swap
Burning Brakes
Joined: Nov 2015
Posts: 762
Likes: 94
From: Airdrie Alberta
I didn't install the new LS AC system at this time but plan to down the road.
Burning Brakes
Joined: Nov 2015
Posts: 762
Likes: 94
From: Airdrie Alberta
Sweet, you also get the programming harness. It will allow you to program the ecm without using your car wiring harness.
HP tuner work pretty good, just need to get rid of the vats on the 5.3 ecm.
I used a shorty 90 deg elbow on 103mm throttle body going into a afe air filter using an 4in to 5in adapter. I didn't need to use a mass air flow unit on my car. Looking back on my build, I wished I used a composite intake manifold rather than my aluminum intake. Wow does it get hot. Looks good. I have a LS9 cam, ls3cnc heads, ls3 roller rocker, ls3 intake on the shelf. I want to get my rear end upgraded and transmission done prior to adding those parts.
Not sure on what type of boost device I want to use yet. The car is tons of fun as is right now.
I'm sure a new 2018 vette is faster than this but not by much. Mine's probably louder though
HP tuner work pretty good, just need to get rid of the vats on the 5.3 ecm.
I used a shorty 90 deg elbow on 103mm throttle body going into a afe air filter using an 4in to 5in adapter. I didn't need to use a mass air flow unit on my car. Looking back on my build, I wished I used a composite intake manifold rather than my aluminum intake. Wow does it get hot. Looks good. I have a LS9 cam, ls3cnc heads, ls3 roller rocker, ls3 intake on the shelf. I want to get my rear end upgraded and transmission done prior to adding those parts.
Not sure on what type of boost device I want to use yet. The car is tons of fun as is right now.
I'm sure a new 2018 vette is faster than this but not by much. Mine's probably louder though
Thread Starter
Drifting
Joined: Jun 2007
Posts: 1,454
Likes: 15
From: Martinsburg WV
Sweet, you also get the programming harness. It will allow you to program the ecm without using your car wiring harness.
HP tuner work pretty good, just need to get rid of the vats on the 5.3 ecm.
I used a shorty 90 deg elbow on 103mm throttle body going into a afe air filter using an 4in to 5in adapter. I didn't need to use a mass air flow unit on my car. Looking back on my build, I wished I used a composite intake manifold rather than my aluminum intake. Wow does it get hot. Looks good. I have a LS9 cam, ls3cnc heads, ls3 roller rocker, ls3 intake on the shelf. I want to get my rear end upgraded and transmission done prior to adding those parts.
Not sure on what type of boost device I want to use yet. The car is tons of fun as is right now. I'm sure a new 2018 vette is faster than this but not by much. Mine's probably louder though
HP tuner work pretty good, just need to get rid of the vats on the 5.3 ecm.
I used a shorty 90 deg elbow on 103mm throttle body going into a afe air filter using an 4in to 5in adapter. I didn't need to use a mass air flow unit on my car. Looking back on my build, I wished I used a composite intake manifold rather than my aluminum intake. Wow does it get hot. Looks good. I have a LS9 cam, ls3cnc heads, ls3 roller rocker, ls3 intake on the shelf. I want to get my rear end upgraded and transmission done prior to adding those parts.
Not sure on what type of boost device I want to use yet. The car is tons of fun as is right now.
I'm sure a new 2018 vette is faster than this but not by much. Mine's probably louder thoughSounds like you've got some experience with hp tuners? I'm sure it'll take a while to figure out what I'm doing. So I should be able to unlock my ecm and make changes by myself? From what I've read there are also options for similar tunes to try?
I also wanted to delete the maf for a speed density tune. Hopefully this isn't too hard to figure out.
Last edited by armybyrd; Aug 9, 2017 at 11:29 PM.
Burning Brakes
Joined: Nov 2015
Posts: 762
Likes: 94
From: Airdrie Alberta
[QUOTE=armybyrd;1595329792]Sounds like you've got some experience with hp tuners? I'm sure it'll take a while to figure out what I'm doing. So I should be able to unlock my ecm and make changes by myself? From what I've read there are also options for similar tunes to try?
I also wanted to delete the maf for a speed density tune. Hopefully this isn't too hard to figure out.[/QUOTE
You'll figure it out, lots of utube vids on HP tuner and forums on get rid of vats. You just got to giver a try. My fast ez tuning was super easy, just have to know some of the basics to get it to work. I would just add some timing and some fuel to the basic tune and run it as is. Maybe raise the rev limiter at little?
You get the data recording part of HP tuners?
I'm probably 350 to 400 rwhp area with my set-up, still way to slow for me...
I also wanted to delete the maf for a speed density tune. Hopefully this isn't too hard to figure out.[/QUOTE
You'll figure it out, lots of utube vids on HP tuner and forums on get rid of vats. You just got to giver a try. My fast ez tuning was super easy, just have to know some of the basics to get it to work. I would just add some timing and some fuel to the basic tune and run it as is. Maybe raise the rev limiter at little?
You get the data recording part of HP tuners?
I'm probably 350 to 400 rwhp area with my set-up, still way to slow for me...
Last edited by Mike Holmen; Aug 9, 2017 at 11:59 PM.
Thread Starter
Drifting
Joined: Jun 2007
Posts: 1,454
Likes: 15
From: Martinsburg WV
[QUOTE=Mike Holmen;1595329983]
Bought the standard version from a guy on eBay. I'll prob end up upgrading to pro eventually.
Sounds like you've got some experience with hp tuners? I'm sure it'll take a while to figure out what I'm doing. So I should be able to unlock my ecm and make changes by myself? From what I've read there are also options for similar tunes to try?
I also wanted to delete the maf for a speed density tune. Hopefully this isn't too hard to figure out.[/QUOTE
You'll figure it out, lots of utube vids on HP tuner and forums on get rid of vats. You just got to giver a try. My fast ez tuning was super easy, just have to know some of the basics to get it to work. I would just add some timing and some fuel to the basic tune and run it as is. Maybe raise the rev limiter at little?
You get the data recording part of HP tuners?
I'm probably 350 to 400 rwhp area with my set-up, still way to slow for me...
I also wanted to delete the maf for a speed density tune. Hopefully this isn't too hard to figure out.[/QUOTE
You'll figure it out, lots of utube vids on HP tuner and forums on get rid of vats. You just got to giver a try. My fast ez tuning was super easy, just have to know some of the basics to get it to work. I would just add some timing and some fuel to the basic tune and run it as is. Maybe raise the rev limiter at little?
You get the data recording part of HP tuners?
I'm probably 350 to 400 rwhp area with my set-up, still way to slow for me...
Bought the standard version from a guy on eBay. I'll prob end up upgrading to pro eventually.
Burning Brakes
Joined: Nov 2015
Posts: 762
Likes: 94
From: Airdrie Alberta
I wished I went the HP tuners route myself. Way easier to add boost down the road. My current FAST setup isn't boost friendly, was told I had to upgrade to something different.
Your setup with 5.3L and the 4+3 is very cool swap. I'm surprised on how good everything has been working so far with my car. I'm sure my LQ9 as is more drive able, street friendly than a modified 383 to the same power levels.
I drive a 2016 chevy silverado 2016 5.3L drive injection engine daily for work. Been very impressed on the power and fuel mileage so far.
The LQ9 car runs cooler engine temps than my stock TPI engine ever did.
Your setup with 5.3L and the 4+3 is very cool swap. I'm surprised on how good everything has been working so far with my car. I'm sure my LQ9 as is more drive able, street friendly than a modified 383 to the same power levels.
I drive a 2016 chevy silverado 2016 5.3L drive injection engine daily for work. Been very impressed on the power and fuel mileage so far.
The LQ9 car runs cooler engine temps than my stock TPI engine ever did.
Last edited by Mike Holmen; Aug 10, 2017 at 09:14 PM.
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Pro
Joined: Mar 2018
Posts: 605
Likes: 64
From: WV
Ended up going overseas for a few months and got a C6 Z in the mix. I recently got my Novak parts needed to make the 4 speed work with the 5.3 though and I do plan on having the tranny back in before spring.
Pretty much life got in the way but I'll never get rid of the C4 so it will get done.
Pretty much life got in the way but I'll never get rid of the C4 so it will get done.
Last edited by slow_zo6; Feb 23, 2019 at 07:32 PM.
3rd Gear
Joined: Oct 2020
Posts: 3
Likes: 1
Do you have any more updates to this project? I'm currently sitting at the same spot as you. I have an lq4 sitting besides the car mounting the 4+3 to it. Fighting with the wiring harness. I think I'm going to order a standalone engine harness. I'm just trying to figure out how to keep the lights, Windows and other simple electrical working.
Instructor
Joined: Oct 2021
Posts: 201
Likes: 31
Do you have any more updates to this project? I'm currently sitting at the same spot as you. I have an lq4 sitting besides the car mounting the 4+3 to it. Fighting with the wiring harness. I think I'm going to order a standalone engine harness. I'm just trying to figure out how to keep the lights, Windows and other simple electrical working.
Instructor
Joined: Oct 2021
Posts: 201
Likes: 31
Do you have any more updates to this project? I'm currently sitting at the same spot as you. I have an lq4 sitting besides the car mounting the 4+3 to it. Fighting with the wiring harness. I think I'm going to order a standalone engine harness. I'm just trying to figure out how to keep the lights, Windows and other simple electrical working.