Industrail Injection Twins

[DuramaxPowered]

IMO an S480 shouldn't be used as the atmosphere turbo on a set of twins utilizing a stock VVT. I believe that there is too much air for the exhaust housing on the stocker to pass through at WOT. An s475 will flow all the air you need with a single cp3. If you want a bigger set of twins, ditch the VVT. What goes in must come out.

 

[paint94979]

IMO an S480 shouldn't be used as the atmosphere turbo on a set of twins utilizing a stock VVT. I believe that there is too much air for the exhaust housing on the stocker to pass through at WOT. An s475 will flow all the air you need with a single cp3. If you want a bigger set of twins, ditch the VVT. What goes in must come out.

what goes up must come down It's physics it's inevitable:spit::hug:

 

[Large1]

what goes up must come down It's physics it's inevitable:spit::hug:

Well i think i can fix drive pressure with headers and up-pipes and from what i understand, I can have this setup tuned this properly to handle the s480. i went with the s480 because of the potential it offers. i am starting w/ a single cp3 but may go to a dual fueler/ larger injector setup if i like it. I don't want to be swapping turbos out all the time so i am going large the first time.

 

[Large1]

Rocks fall too!:angel:

Hey what did you break in your rear end. I have run lifted trucks before but nothing the HP i will be pushing. I will either be running 4.10's or 4.56. I will be driving this truck everyday so i was thinking 4.10 and was told the 4,56 would be better for off roading which i will only be doing on the weekends. Also, since you broke your.. what did you do to make it stronger? sorry to hijack thread but this has got me thinking again

 

[DetailsUnlimited]

I went with the tru-trac from eaton. Broke the rear locker and teeth on the gears. I had a one wheeler! LOL 4:56 is what I would do if going 37 or bigger. I think it would put you closer to factory spec's with the big tires you choose. And make it easier on the motor and tranny with your new found HP. Hope this help!

 

[TrentNell]

Well i think i can fix drive pressure with headers and up-pipes and from what i understand, I can have this setup tuned this properly to handle the s480. i went with the s480 because of the potential it offers. i am starting w/ a single cp3 but may go to a dual fueler/ larger injector setup if i like it. I don't want to be swapping turbos out all the time so i am going large the first time.

i lost 5 psi with headers and up-pipes with much higher flowing turbo's then you will have , not the 30+ psi drop you would need , not to mention headers and up-pipes are 1500 bucks , this is my last post in this thread , i have only been trying to help but if your set on the II kit then best of luck its not a bad kit just not as god as it should be .

 

[ripmf666]

Trent they can only learn from spending money now.

 

[Large1]

i lost 5 psi with headers and up-pipes with much higher flowing turbo's then you will have , not the 30+ psi drop you would need , not to mention headers and up-pipes are 1500 bucks , this is my last post in this thread , i have only been trying to help but if your set on the II kit then best of luck its not a bad kit just not as god as it should be .

Hey thanks for your input. you have obviously been thru the rounds a couple time and your engine build is very interesting. So if i were to run an s480 in your opinion regardless of the kit i buy what would you recommend i do to the engine. The mjority have told me to just keep the stock primary turbo and run headrs/ uppipes. If you were to run an s480. what mods would you make?

 

[LBZ]

Hey thanks for your input. you have obviously been thru the rounds a couple time and your engine build is very interesting. So if i were to run an s480 in your opinion regardless of the kit i buy what would you recommend i do to the engine. The mjority have told me to just keep the stock primary turbo and run headrs/ uppipes. If you were to run an s480. what mods would you make?

Headstuds.
If your going to dual CP3 it, be prepared to be spending about 10 g's for a built engine as likely your gonna break something.

Not a matter of if but when....

 

[Large1]

I don't plan on dual cp3's right now.. so just headstuds for s480?

 

[SDP]

I don't plan on dual cp3's right now.. so just headstuds for s480?

Why would you go with an S480 when the s475 is proven with the stock vvt? Seems to me Todd's issues were using the 80mm with the stock turbo. Also, if you are staying single CP3 why do you need more air than the s475? All the s480 will do is raise drive pressure from what we've heard from Todd, maybe I'm wrong though.

 

[dmaxvaz]

why would you go with an s480 when the s475 is proven with the stock vvt? Seems to me todd's issues were using the 80mm with the stock turbo. Also, if you are staying single cp3 why do you need more air than the s475? All the s480 will do is raise drive pressure from what we've heard from todd, maybe i'm wrong though.

i have a s480 compounded with the stock ihi turbo, my drive psi is within 2-3 psi of what boost is. Is the vvt turbos more resrictive than the ihi? What is the ar size on the vvt versus the ar on the ihi?

 

[SDP]

i have a s480 compounded with the stock ihi turbo, my drive psi is within 2-3 psi of what boost is. Is the vvt turbos more resrictive than the ihi? What is the ar size on the vvt versus the ar on the ihi?

Yours is also wastegated, which I'm sure helps. Not sure on differences on the stock turbo's.

 

[LBZ]

You can tune the VVT to act just like an IHI. DP will be a little higher but I'm sure you can get it closer than 2:1 with the right set-up. You will likely still want a wastegate in there as well.

I also agree, a 474 or 475 would be more suited to your application and you can always upgrade later on. Headstuds are a good idea if you plan to regularily exceed 45psi.

 

[JoshH]

You can tune the VVT to act just like an IHI. DP will be a little higher but I'm sure you can get it closer than 2:1 with the right set-up. You will likely still want a wastegate in there as well.

I also agree, a 474 or 475 would be more suited to your application and you can always upgrade later on. Headstuds are a good idea if you plan to regularily exceed 45psi.

I don't think the stock VVT housing will flow as much with the vanes all the way open as the IHI housing will flow with the waste gate all the way open. That's the problem with the stock turbo in a 700+ HP application. The exhaust gets bottle-necked at the stock turbo turbine housing.

 

[LBZ]

Very true Josh. Exactly why I think the 480 is too much!

 

[DuramaxPowered]

On my truck I run a tune that is 3150PW. With an s475 it makes right around 60PSI boost and doesn't break 1300*F egt's running up to 120. This to me is enough proof that the 75mm compressor flow plenty for my application. If I had dual CP'3 and big sticks would be a different story.

 

[Bako_Dmax]

On my truck I run a tune that is 3150PW. With an s475 it makes right around 60PSI boost and doesn't break 1300*F egt's running up to 120. This to me is enough proof that the 75mm compressor flow plenty for my application. If I had dual CP'3 and big sticks would be a different story.

What kind of Vane positioning are you running?

 

[duratothemax]

so an S480 wouldnt work well with big injectors, stock LBZ CP3, and a stock LLY turbo (they are looser than the LBZ/LMM)????

 

[DuramaxPowered]

What kind of Vane positioning are you running?

When boost comes vane position drops to 0