5.3 turbo build
Thread Starter
Teching In
Joined: Feb 2017
Posts: 2
Likes: 0
From: Mass
5.3 turbo build 01 5.3 stock lower end
ZO6 cam Ls7 lifters
317 heads w/pac1218 Springs
Ls9 head gaskets
TBSS intake w/92mm throttle body
80lbs injectors
1 3/4 turbo headers
Opions on a good turbo size ??? This still at "build" stage but it will probably ended up in a gbody car with a 700r4 Trans, maybe like 3.73 gears. A 80% street terror and 20% track....
ZO6 cam Ls7 lifters
317 heads w/pac1218 Springs
Ls9 head gaskets
TBSS intake w/92mm throttle body
80lbs injectors
1 3/4 turbo headers
Opions on a good turbo size ??? This still at "build" stage but it will probably ended up in a gbody car with a 700r4 Trans, maybe like 3.73 gears. A 80% street terror and 20% track....
Here is the single turbo I am using on my stock 5.3. Since I am 99% street and the bottom end is OEM, I will never want to see much more than 500~ horsepower due to reliability constraints. Since I am 99% street I also wanted the fastest spooling, lightest configuration possible.
https://www.full-race.com/store/turb...64-5mm-1.html/
Here is the compressor map, charted to a 5.3L engine with reasonable VE
notice at 15psi of boost, more than I will run for most of the driving I will do, it runs near the edge of the map around 650 horsepower, which is more than I will ever want from the setup. So in essence the turbo is still a "bit too large". Why anybody would install anything larger *cough* is beyond me, it seems like an epidemic around here.
I put the majority of my build funds into the trans/converter (4l80e / 9.5" yank 2800)which seems like the soft spot in 500+rwhp setups.
https://www.full-race.com/store/turb...64-5mm-1.html/
Here is the compressor map, charted to a 5.3L engine with reasonable VE
notice at 15psi of boost, more than I will run for most of the driving I will do, it runs near the edge of the map around 650 horsepower, which is more than I will ever want from the setup. So in essence the turbo is still a "bit too large". Why anybody would install anything larger *cough* is beyond me, it seems like an epidemic around here.
I put the majority of my build funds into the trans/converter (4l80e / 9.5" yank 2800)which seems like the soft spot in 500+rwhp setups.
Last edited by kingtal0n; Mar 31, 2017 at 08:54 PM.
01 5.3 stock lower end
ZO6 cam Ls7 lifters
317 heads w/pac1218 Springs
Ls9 head gaskets
TBSS intake w/92mm throttle body
80lbs injectors
1 3/4 turbo headers
Opions on a good turbo size ??? This still at "build" stage but it will probably ended up in a gbody car with a 700r4 Trans, maybe like 3.73 gears. A 80% street terror and 20% track....
ZO6 cam Ls7 lifters
317 heads w/pac1218 Springs
Ls9 head gaskets
TBSS intake w/92mm throttle body
80lbs injectors
1 3/4 turbo headers
Opions on a good turbo size ??? This still at "build" stage but it will probably ended up in a gbody car with a 700r4 Trans, maybe like 3.73 gears. A 80% street terror and 20% track....
Now if he comes back and says it only has to last 12,000 miles or 5,000 miles that is another thing all together. So this is what we really need to know: how long does it have to last? On week? We can make 1000rwhp for a week I bet.
You are entitled to your own opinion. However, he said stock bottom end. As if that wasn't enough, he said "80% street". Taken together, we have all the information we need, at least in my opinion. And here it is: we want reliable transportation with good economy and stoplight to stoplight torque that will service 50,000 miles or more. This sets the stage: power cap around 500 horsepower plus or minus a hundred, lockup overdrive trans, and the smallest turbocharger for quick spool character (that stoplight torque) that will still hit our power goals with a bit of room to grow. The turbo I posted is good to 750wheel horsepower; enough to murder a stock bottom end 5.3L before 50,000 miles (assuming you started with a typical 150k used longblock).
Now if he comes back and says it only has to last 12,000 miles or 5,000 miles that is another thing all together. So this is what we really need to know: how long does it have to last? On week? We can make 1000rwhp for a week I bet.
Now if he comes back and says it only has to last 12,000 miles or 5,000 miles that is another thing all together. So this is what we really need to know: how long does it have to last? On week? We can make 1000rwhp for a week I bet.
TECH Enthusiast
Joined: Jun 2013
Posts: 513
Likes: 1
From: Moose Jaw SK, Canada
I think you may be off "or on?" your meds again, but here goes. A tiny turbo that spools really fast could make enough torque to rip apart a 700r4 transmission on his motor. A huge turbo that nets 1k+hp will also rip apart his 700r4. Either scenario could last for several dyno pulls, and maybe even a couple of track runs. My comment was mostly that whatever path he chooses, a transmission upgrade will be required.
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The best running combo for the $$$ for me was my original setup which pretty much runs where my current 6.0 does now (~134mph)
Gen III 5.3, 125K miles, all stock except valvetrain
LS6/Z06 cam, LS6 springs
60lb injectors
LS3 exh manifolds
s475 t4 83mm turbine
th400/cheapish converter/3.27
Ran 135mph in a ~3400 Mustang at 16psi. For the money it was great and responsive. Probably could do the same with a cheaper/better fitting turbo.
Gen III 5.3, 125K miles, all stock except valvetrain
LS6/Z06 cam, LS6 springs
60lb injectors
LS3 exh manifolds
s475 t4 83mm turbine
th400/cheapish converter/3.27
Ran 135mph in a ~3400 Mustang at 16psi. For the money it was great and responsive. Probably could do the same with a cheaper/better fitting turbo.
I think you may be off "or on?" your meds again, but here goes. A tiny turbo that spools really fast could make enough torque to rip apart a 700r4 transmission on his motor. A huge turbo that nets 1k+hp will also rip apart his 700r4. Either scenario could last for several dyno pulls, and maybe even a couple of track runs. My comment was mostly that whatever path he chooses, a transmission upgrade will be required.
Second, when starting from zero, one should NEVER let the drivetrain dictate what turbo to use. It works the other way around: you setup the engine the way you want it to be used first, THEN you build the drivetrain in harmony. I would never sacrifice low end torque because of a transmission that I was not going to be able to use anyways. That is how the quote above reads: "the turbo makes too much low end torque for the 700R4, which he will not be using anyways, so it is not good to use that turbo". It doesn't make any sense.
Teching In
Joined: Oct 2017
Posts: 14
Likes: 0
Halp 01 5.3 stock lower end
ZO6 cam Ls7 lifters
317 heads w/pac1218 Springs
Ls9 head gaskets
TBSS intake w/92mm throttle body
80lbs injectors
1 3/4 turbo headers
Opions on a good turbo size ??? This still at "build" stage but it will probably ended up in a gbody car with a 700r4 Trans, maybe like 3.73 gears. A 80% street terror and 20% track....
ZO6 cam Ls7 lifters
317 heads w/pac1218 Springs
Ls9 head gaskets
TBSS intake w/92mm throttle body
80lbs injectors
1 3/4 turbo headers
Opions on a good turbo size ??? This still at "build" stage but it will probably ended up in a gbody car with a 700r4 Trans, maybe like 3.73 gears. A 80% street terror and 20% track....
Thread Starter
Teching In
Joined: Feb 2017
Posts: 2
Likes: 0
From: Mass
https://m.ebay.com/itm/92mm-Throttle-body-TPS-IAC-Throttle-Position-Sensor-For-LSX-LS-LS1-LS2-LS7/142214761455?hash=item211ca90bef:g:6NYAAOSwNWxZ7WF 7