When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Ive read countless hours and pretty solid info but can be quite overwhelming. I did my first ls swap in a 68c10 this year. Engine was a high mileage lc9 200k. I bought a btr truck norris kit with cam, springs, seals,pushrods and lifters. had the heads freshened up installing seals and springs to match cam. New Truck tbss intake and tuneing on holley xmax. Getting bit by the bug i wanna venture into a turbo. Looking at holley turbo manifolds and there crossover. Will plumb a 2.25 or 2.50 hotpipe off of the manifold to a flange or vband style turbo. I have no battery and will mount far into pass side.
Truck is 3600lbs
4l80e built by 4l80e guy
3600 fti converter
3.73 gears mini spooled
only real mod to engine is truck norris cam. Which isn’t optimal 107lsa. Being an lc9 with flat tops and higher compression. I am looking at ebay 7875 cast and billet versions maybe vsracing with vband mount. Not sure an ar 96 or ar 1.25. one of my reasons for choosing this turbo is 3” exhaust housing so i can run a boost activated cutout and a full 3” out the back.
so is it a ebay cast or billet 7875 or pony up for vs racing.
Very cool truck. Best of success to you with your project.
My only suggestion would be to use a 2.25” hot side.
You also have to tell us how you want to use the truck. Where you want the power and how much of it you want.
ill take note on the 2.25 hotside. Thank you.
truck is a weekend truck. Will make the strip maybe once a year. Mostly an aggressive play truck that id like to drive on the evenings and weekends. I dont see needing to spin the truck over 7k either and i think limiter was set at 6750rpm.
truck is a weekend truck. Will make the strip maybe once a year. Mostly an aggressive play truck that id like to drive on the evenings and weekends. I dont see needing to spin the truck over 7k either and i think limiter was set at 6750rpm.
For just an aggressive play truck you will be much happier going with what this forum would generally deride as an undersized turbo. I would say 70/70 or preferably smaller. You won't get the massive top end rush or <1/1 backpressure ratios people love to talk about, but you will get boost at far lower rpms. With the stall you have you could be in boost before you get the gas pedal all the way to the floor instead of waiting for spool up.
For just an aggressive play truck you will be much happier going with what this forum would generally deride as an undersized turbo. I would say 70/70 or preferably smaller. You won't get the massive top end rush or <1/1 backpressure ratios people love to talk about, but you will get boost at far lower rpms. With the stall you have you could be in boost before you get the gas pedal all the way to the floor instead of waiting for spool up.
i will look into the 7070 you speak of too. I didnt see any ebay cheap ones like you do of the 7875. So is the 7070 with .96 ar strickly borg warner. I only have 92/93oct local to me and can see maybe 500rwhp out of what i got. Thanks for input
https://ls1tech.com/forums/forced-in...r-results.html
That thread has some interesting results of turbo testing on a 5.3l. I have never seen it mentioned, but VS has a 67/73 for under $400 that sounds very interesting for a fun street driver kind of setup. Too bad I have never seen any testing on it.
First thing, have you weighed the truck ? Mine is 4220 with fuel , nothing else. Aluminum block gonna save you 90-100 , Don't know if it's short box or not but maybe another 100 or a bit more for short box. Maybe 60-80 for all turbo stuff, still a big difference but doesn't effect the choices. IMO , a 7875 .96 on a 6L spools a little too fast for street tires but would be near perfect on a 5.3 ( also depends on cam) with good tune and converter will be a blast on the street and you'll be looking for ways to improve traction. That cam has tight LSA but short intake duration so overlap might not be too bad , lack of an exhaust # makes that hard to tell. Someone must have the actual # , built it , run it , I'm sure you will be happy!!
First thing, have you weighed the truck ? Mine is 4220 with fuel , nothing else. Aluminum block gonna save you 90-100 , Don't know if it's short box or not but maybe another 100 or a bit more for short box. Maybe 60-80 for all turbo stuff, still a big difference but doesn't effect the choices. IMO , a 7875 .96 on a 6L spools a little too fast for street tires but would be near perfect on a 5.3 ( also depends on cam) with good tune and converter will be a blast on the street and you'll be looking for ways to improve traction. That cam has tight LSA but short intake duration so overlap might not be too bad , lack of an exhaust # makes that hard to tell. Someone must have the actual # , built it , run it , I'm sure you will be happy!!
i have state certified scales 1/2 mile from the house. It is a short bed and was weighed full of fuel. The cam i have and the flat top pistons are my downfall of course. But the 3600 convertor make the little 5.3 come alive really well. Im sure a 7875 will be lit by 3200-3600rpm but there are so many combos and opinions. If i were to choose the 7875 i would opt for vs racing v-band hotside.
Great looking truck !!! You can fit a 3" intercooler behind the grill but you have to trim the support piece for the hood latch quite a bit but still is strong enough for 127mph so far. Depending where you put the turbo the old battery area is good for air filter position
Great looking truck !!! You can fit a 3" intercooler behind the grill but you have to trim the support piece for the hood latch quite a bit but still is strong enough for 127mph so far. Depending where you put the turbo the old battery area is good for air filter position
CX racing intercooler is what i have seen on a couple older c10’s like mine. Don’t mind a little trimming. Battery is relocated under bed and that is the plan to mount as far into pass corner as possible so i can keep high mount a/c location for my next phase. Haha. Never ends. The reason i like holley manifold is because i can remote mount turbo in my chosen location away from a/c and dont have to work with where all the others put T4 flange blocking that option. But i find myself going back and fourth on 7875 vs a smaller 7070
I took the time to call VS racing today. Told them about my high mileage ls with the intention of aggressive street driving with a once a year visit to the drag strip. With plans of using holley manifolds using there 2.25” crossover. With me plumbing 2.5” hot pipe to remote mounting turbo far into pass corner where battery was. With a 500rwhp on pump gas expectation. Basically a double v-band 7875 billet with .96ar will do all i need.
That turbo will work great with what you have. I use the holley/hooker log manifold and placed the turbo on the pass side but close to the engine.
Keep in mind that ideally you want the turbo close to the engine so it is supported better and wont crack your hotside. Having a 35lb hunk of iron(turbo) hanging way out to the side while the engine is shaking and moving will eventually fail. The only way that will really work is if you can fab up some crazy brace back to the engine, or get solid engine mounts, and then chassis mount the turbo.
You may be better off using a turbo manifold/hotside from a silverado truck. Will be easier as well.
Youll need about 10psi to crack 500whp, which will also be about the limit with pumpgas on your motor. Will be real fun.
That turbo will work great with what you have. I use the holley/hooker log manifold and placed the turbo on the pass side but close to the engine.
Keep in mind that ideally you want the turbo close to the engine so it is supported better and wont crack your hotside. Having a 35lb hunk of iron(turbo) hanging way out to the side while the engine is shaking and moving will eventually fail. The only way that will really work is if you can fab up some crazy brace back to the engine, or get solid engine mounts, and then chassis mount the turbo.
You may be better off using a turbo manifold/hotside from a silverado truck. Will be easier as well.
Youll need about 10psi to crack 500whp, which will also be about the limit with pumpgas on your motor. Will be real fun.
i did purchase my A/C mounts that match the alt/power steering driver side. So i was planning on installing a/c, then mounting turbo like you said close to manifold or i will come up with some type of mount. Need to gather parts for mock up.
Last edited by Oneshotkyle; Oct 22, 2024 at 10:18 PM.
I'd do 2" hotside with the billet VS 7875.
Response will be fast and carry you to your rpm limit easily.
Spend a little money on the down pipe too, maybe 4" from the turbo with a cutout of some kind under the truck then to 3" running out to the bumper.
A free-flowing down pipe will really help spool.
Your combo on pump gas I'd keep it around 10-12 psi, I push 14-15 psi with mine now but it's more of a top end killer with an A2W I/C so different combos.
You can always add a water/meth kit later for a few extra pounds and piece of mind.
I had a cutout on mine but kept bending the plate with the anti lag/rev limiter bangs...so I removed it... I miss the sound of the turbine with it open though
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.
Turbo in swap suggestions 
