Question about S480
Question about S480 So I've got a S480. I'm looking at wanting to go to billet wheel. I've heard of billet 83mm. I'm assuming I could have that installed but I'm also assuming my housing would need machined aswell? So my questions are, what are my options? Who has changed to billet? How much did it help? Who or where should I send my turbo off to?
thanks...
thanks...
What are the specs of the 80 you have now and what is it installed on? How much boost do you run now and at what RPM? How much power do you make now and how much do you want to make?
Only reason I asked is most people looking to upgrade their 80mm cast wheels aren't pushing the cast wheel to near it's potential. That also depends on the hotside of the turbo. IMO you should be able to make 1000whp no problem on a 347 setup up properly. Hard to say with the info given, but very mild factory headed 370ci LS motors are making 1000+ with the right 76mm turbo around 25lbs. Id' think a 347 with nice heads and cam wouldn't have a problem doing the same.
Trending Topics
So your at 25psi now or thats what you plan to run? What are you reving it to?
Only reason I asked is most people looking to upgrade their 80mm cast wheels aren't pushing the cast wheel to near it's potential. That also depends on the hotside of the turbo. IMO you should be able to make 1000whp no problem on a 347 setup up properly. Hard to say with the info given, but very mild factory headed 370ci LS motors are making 1000+ with the right 76mm turbo around 25lbs. Id' think a 347 with nice heads and cam wouldn't have a problem doing the same.
Only reason I asked is most people looking to upgrade their 80mm cast wheels aren't pushing the cast wheel to near it's potential. That also depends on the hotside of the turbo. IMO you should be able to make 1000whp no problem on a 347 setup up properly. Hard to say with the info given, but very mild factory headed 370ci LS motors are making 1000+ with the right 76mm turbo around 25lbs. Id' think a 347 with nice heads and cam wouldn't have a problem doing the same.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo I agree, dyno racing is silly. I was suggesting you max out what you have before looking at upgrades. A cast 80 will put out some serious power and will act slightly different on every setup as far as it’s maxed out potential.
I gained 5mph at the same boost level (25lbs) going from a cast s475 to a billet S476. But I went larger on the exh wheel and AR housing as well. From my buick turbo days, bumping the comp wheel alone (billet or not) isn’t usually worth monster gains. Upgrading just the compressor did make slightly more power, but it always slowed spool and raised backpressure for me. (It takes bigger “bites” of air and is harder to turn) Ideally you should go larger on the exh wheel to match the new larger comp wheel then up the housing size as well to see huge gains.
I gained 5mph at the same boost level (25lbs) going from a cast s475 to a billet S476. But I went larger on the exh wheel and AR housing as well. From my buick turbo days, bumping the comp wheel alone (billet or not) isn’t usually worth monster gains. Upgrading just the compressor did make slightly more power, but it always slowed spool and raised backpressure for me. (It takes bigger “bites” of air and is harder to turn) Ideally you should go larger on the exh wheel to match the new larger comp wheel then up the housing size as well to see huge gains.
I agree, dyno racing is silly. I was suggesting you max out what you have before looking at upgrades. A cast 80 will put out some serious power and will act slightly different on every setup as far as it’s maxed out potential.
I gained 5mph at the same boost level (25lbs) going from a cast s475 to a billet S476. But I went larger on the exh wheel and AR housing as well. From my buick turbo days, bumping the comp wheel alone (billet or not) isn’t usually worth monster gains. Upgrading just the compressor did make slightly more power, but it always slowed spool and raised backpressure for me. (It takes bigger “bites” of air and is harder to turn) Ideally you should go larger on the exh wheel to match the new larger comp wheel then up the housing size as well to see huge gains.
I gained 5mph at the same boost level (25lbs) going from a cast s475 to a billet S476. But I went larger on the exh wheel and AR housing as well. From my buick turbo days, bumping the comp wheel alone (billet or not) isn’t usually worth monster gains. Upgrading just the compressor did make slightly more power, but it always slowed spool and raised backpressure for me. (It takes bigger “bites” of air and is harder to turn) Ideally you should go larger on the exh wheel to match the new larger comp wheel then up the housing size as well to see huge gains.
The base model S480s usually have the 1.32 AR T6 and 96/87 wheel. That’s the “big” wheel and the one you’d want if you plan on upgrading. IMO as long as your Exh minor dia. is larger than your compressor minor diameter your good to go. A larger billet 83 compressor would shine on that turbo.
Wouldn't get too caught up in any specific boost pressure limits either. It’s overall cylinder pressure that lifts a head. Boost alone is a very small part of it. With the right fuel, CC design, cam, and RPM… I’m sure you could run 40+lbs of boost without lifting a 4 bolt head. Boost pressure is similar to dyno readings… just a number.
Wouldn't get too caught up in any specific boost pressure limits either. It’s overall cylinder pressure that lifts a head. Boost alone is a very small part of it. With the right fuel, CC design, cam, and RPM… I’m sure you could run 40+lbs of boost without lifting a 4 bolt head. Boost pressure is similar to dyno readings… just a number.
The base model S480s usually have the 1.32 AR T6 and 96/87 wheel. That’s the “big” wheel and the one you’d want if you plan on upgrading. IMO as long as your Exh minor dia. is larger than your compressor minor diameter your good to go. A larger billet 83 compressor would shine on that turbo.
Wouldn't get too caught up in any specific boost pressure limits either. It’s overall cylinder pressure that lifts a head. Boost alone is a very small part of it. With the right fuel, CC design, cam, and RPM… I’m sure you could run 40+lbs of boost without lifting a 4 bolt head. Boost pressure is similar to dyno readings… just a number.
Wouldn't get too caught up in any specific boost pressure limits either. It’s overall cylinder pressure that lifts a head. Boost alone is a very small part of it. With the right fuel, CC design, cam, and RPM… I’m sure you could run 40+lbs of boost without lifting a 4 bolt head. Boost pressure is similar to dyno readings… just a number.
TECH Regular
Joined: Oct 2012
Posts: 476
Likes: 2
If its got the 87mm inducer turbine wheel.... Just sell it and buy one with the 96/88mm turbine wheel. you will need it to make 1k+ at the tire.
A Cast 80mm compressor with a race cover combine with the 96/1.32 turbine averages about 1000-1050 rwhp set on kill with the gates pinned shut....
The Forced inductions Billet wheels for those turbochargers are worth an additional 200-250 rwhp over the stock cast wheels and they make an additional 4-8 psi with the gates pinned as well.
A Cast 80mm compressor with a race cover combine with the 96/1.32 turbine averages about 1000-1050 rwhp set on kill with the gates pinned shut....
The Forced inductions Billet wheels for those turbochargers are worth an additional 200-250 rwhp over the stock cast wheels and they make an additional 4-8 psi with the gates pinned as well.
If its got the 87mm inducer turbine wheel.... Just sell it and buy one with the 96/88mm turbine wheel. you will need it to make 1k+ at the tire.
A Cast 80mm compressor with a race cover combine with the 96/1.32 turbine averages about 1000-1050 rwhp set on kill with the gates pinned shut....
The Forced inductions Billet wheels for those turbochargers are worth an additional 200-250 rwhp over the stock cast wheels and they make an additional 4-8 psi with the gates pinned as well.
A Cast 80mm compressor with a race cover combine with the 96/1.32 turbine averages about 1000-1050 rwhp set on kill with the gates pinned shut....
The Forced inductions Billet wheels for those turbochargers are worth an additional 200-250 rwhp over the stock cast wheels and they make an additional 4-8 psi with the gates pinned as well.