Silverado2469

I didn't even think about talking to him first. Ill send them an email and see what the recommend.

I don't think he's being a dick. But just informing the RP that if he doesn't know this answer them building a custom twin turbo kit may be above his skill level. And he should make sure he does plenty of research before spending thousands of dollars and then getting frustrated and either selling everything or paying someone else more money to finish it for him.

Ya I'm pretty confident my setup will turn out good. A few hiccups is expected. And luckily I live like 30-40 minutes from blackbears dyno. Now do I need a different MAF? Or will our stock read up to 1 bar 14.7 psi? I'm only running 6-8 but invade I pump it up just curious.

Oh no I know I need tons more research. Just researching one thing at a time to so I don't overload myself with info. Once I get each section. (Enough to do my setup) I move on to the next. My dads a master mechanic. And will be helping with the install if I need it. If like to do most of it on my own. But the oil system I'm going to ask for help. And ya I looked and saw TONS of info on that website. That info cleared up my routing problem. I was gonna try and stay on the INSIDE of the frame. Not the outside. But that picture clears up my waste gate problem thanks man. You have been a lot of help. Like really I truly appreciate it.

Ok one more question. I was under the assumption your waste gate hooked up to the turbo itself. Since I've never held a turbo before, but I've seen pics of one I noticed I between the compressor, turbine housing is a little hole. With 2 holes on the side for bolts. Matching most waste gates I've seen. But after doing more research on how a waste fare works, etc. I've read people put them on the mamifolds. Since I can't do that as I don't have intake manifolds, where do I mount my waste gate? Do I attach it to that part of the turbo, and then run a dump into my exhaust. Or can I just dump it next to exhaust. Without plumbing it into the exhaust? Like just let the air go into the air. Not into the exhaust, then into the air? Or does this not work? Thanks again. And if you have pictures, that is the BEST way I learn. By seeing/doing. And since I won't be doing for another month or so. Pictures are the best. Thanks.

Mmm ya you make doe valid points. Well I think I'll start with a rear mount cause of emissions in California. Then when I get a new DD maybe switch to a front mount.

Which turbo set up did you like more? Front or rear? For drive ability, ease of install, etc. like as a whole project, power, all of that which do you think was better? I think I'll stay with a rear mount. And if I want more power ill do a twin setup.

I don't know how anyone can get a turbo and piping under these hoods lol. I was looking thinking maybe do it there. But I don't know how it would fit lol.

Well I will be happy if it spoils by 2500-3000. I'm spinning the truck to 6000-6200. And will put a 2800 stall on. So that should be perfect for my DD. and a nice track runner. 3:73 gears. Will work well with this setup. If you could get some pics up of your charger piping I would be forever great full. I'm going to keep looking to see if I can find some ideas on routing.

Well if yours is a .96. Then a .81 would be perfect right? And just curious how much power are you making?

Makes sense as to why I can't open it. Thanks haha

Won't let me open the map. Ill keep trying though.

Ok I see why t4 is what I want. I did some more research. So I'm pretty sure this is the turbo ill be running. It's a t76. I think the .81 exhaust will spool under 3k. I read somewhere that a guy with a 4.6l ford was running a .96 exhaust. And at 30% throttle started spooling at 3200. So my 5.3l with a .81 rear mounted should spoil at 2500-2800 I'm guessing. And if its a little higher when I do my cam swap later on down the road it'll spoil sooner. Please correct me of I'm wrong. But I think I got that down. Kind of. I know there's a math equation you can do to figure it out. But the math just confused the shit out of me. Haha. After looking under the truck again. This 2.5" piping gonna be real hard to fit. I might have found a place to route it. But would 2" aluminum piping work as well? Or should I stay with 2.5" piping? The 2" would fit easier. I just don't think with my stick y pipe that the pipe will fit by it. I'm not sure yet.

Ok nothing smaller than a T4 flange, what's a good exhaust size to keep spool low? I have a stock 5.3l. Why wouldn't I want a t3 flange? I was under the impression that a .84 t3 flang was a .65-.70 Ar for a t4 flange? Is that correct? And what's the benefit of a t4 over a t3?

So I tried to edit my above post. For some reason I can't. So here's another turbo I'm looking at. What do you guys think??

Your off to a good start. But I say start simple. With your 5.3, first. You have headers? Put the stock manifolds back on. That was the one single best improvement I did to my sts setup. It cut my spool time in probably half. Headers flow smoother than manifolds, thus slowing exhaust down because it is less restrictive. The other part of your spool time u are forgetting is heat. Turbos don't just use exhaust velocity to spool, heat plays a major part of it. If you are running a return fuel system, then the 255 walbro will be fine for your power levels. Why the boost controller? You are not wanting high boost levels. So keep it simple to start and use your waste gate. Springs for a waste gate are like 30 bucks. Change your boost that way until you get things dialed in and figured out. As for your turbo. The oil supply will come off your engine block right next to your oil filter. If you have a oil cooler, you tap right into the aluminum block of the cooling lines block. If not, then if I remember correctly, you put a spacer block in that position where the tranny cooler lines would go and you tap out the block with a 4an fitting. You should be good to supply your oil with a #4 line. This line will have the same pressure as your motor now. Next is the oil pump. Pita! I lost 3 turbos before I got the newest helix geared pump from sts. The problem with the oil system is getting the oil out of the turbo. I ended up usin a 5/8 rubber hose off the turbo to the scavenger pump then running a #8 return line from the pump to the oil cap. It would sure be a lot simpler to run a oil cooled only turbo. Unless you are living in the desert there is no need, unless you are road racing. Lol Your charge pipes, just buy aluminum 2.5" charge pipes from like cx racing or frozen boost. They work well and you can use a chop saw to cut up your piping and just silicone join them together. Easy. DUDE. Thank you! This is exactly what I was looking for! What turbo do you think I should run. My dad said a 75mm. But I think that's to big. I was thinking more of a t70 size. Like this one from CX. And my last question. Where did you run your charger piping. Can you post up some picks? I was looking. And idk if its going to fit where I wanted it to. I wanted it to go back up next to the passenger header, but it's going to be a VERY tight fit if it does fit. Ill try to get some pics up of that later today. And show you what I was thinking. What oil pump does STS use, I'll just buy that same pump. If it will save me on some turbo's. or what are the specs. Either or. Again. Thank you for this. It makes me feel a hell of a lot better knowing I can cut some cost on the piping, and that I'm at least headed in the right direction. I'm thinking of picking up a spare 5.3l incase I blow this one up. XD. Haha. Maybe pick up a 6.0. And if this blows do the swap.

Ok cool ill give it a look thanks! My dads a master mechanic and has built plenty of turbo vehicles. But I was trying to figure all the specs out myself. But it's looking like ill be taking the drive down to his house for a day of schooling for spooling. Haha. He actually has a 12 second 3500 diesel. 4 door long bed it actually pulls the left front tire when it launches. So bad ass. Haha. But I want to build my truck to beat him. Lol. Or come close. And say I did it myself. Ill read that forum. And see if I can figure it out. Thanks again.

Perfect thank you. The tc72 was one of my choices. But I felt it was to big. I will contact a company about sizing. And get it over with hopefully. 600 rwhp is a lot that must be an awesome setup.

I thought diesel turbo's were not made for how a gas engine makes air. And so they wouldn't work as well as a turbo meant for gas engines? I could be wrong but I thought that's what it was. And for 2 grand (about what there turbos are) I would just get a garret. This is my first turbo build. So I'm planning on going for an eBay turbo. Invade I made a math error and blow it up. Looking to spend 2k on the whole kit minus the tune. I'm sure they make great turbo's. but I'm not looking to spend that on a turbo. These are my goals. 375-425 RWHP. 6-8 PSI. 2k max budget + tune. Spool time around 2500-3000. Spin the motor to about 6k 3:73 gears. 2800 stall. This is what I have done so far, Doug thorley mid length headers, 3" cat back exhaust. My plan as in my head. Reduce exhaust to 2-1/2" or 2-1/4" to increase exhaust velocity. 14 gauge mild steel. Connect to turbo, 2-1/2" piping back to intake. Running it next to exhaust, and back up passenger side by the header, coming up and connecting to intake mani, exhaust coming from turbo coming out straight pipe no muffler in front of passenger rear tire, it will be a stand alone kit, and will have a 2 liter tank with a feed/return oil line. A mocal pump 1-2gpm capable of 300* liquids. 255lph fuel pump. 42. Or 60# injectors. 42 should be plenty. But close to maxed out. 60 would be ideal. No intercooler, although I may add one in later on when I change boost from 6-8 to 12-14 after I build the rear end and trans. The only thing I'm having a hard time deciding is what turbo to run, I've never messed with turbos so its like a foreign language to me. I've been reading for at least a month on them, and I feel like I still don't know anything. The turbo size is my biggest concern, I don't want to go to small and over spin the turbo, or get to much back pressure. Over a 2:1 ratio. But I'm not sure how to calculate that, if I could fine a decent sized turbo I'd be happy and could start making the final plans to buy everything little by little.

I'm planning on getting 60lb injectors. Or the 8.1l marine injectors. So the 42lb. A 255lph fuel pump. And run around 6-8psi.

Do you have a link to it? And I have a 5.3l LM7. I actually kept looking and think I found a good turbo. It says 650+ HP. So my 400 should be achievable. And have room to play. What do you think? Is it to big? Or?

Ok been doing a TON of reading. So far this is what I've decided to do. (Still deciding on a turbo) but here's one of my choices. The first turbo here is a little bigger. And should hit the 400 rwhp range easier. And still spool fairly quickly. The second turbo may hit 400. But I think it's a little small. But lag would be non existent behind the 5.3l. As for the oil cooling. I'm going to run a stand alone unit. That I will most likely mount in the bed of my truck. Where I will drill to small holes to run a feed/return line. Run a pump for the return line of course. Right now I have 3" exhaust piping. I may go down to 2-1/4 or 2-1/2" to get the exhaust flowing faster and hopefully keep spool times down. Want to spool by 2500-3000. If not sooner. Depending on the turbo. Comments, concerns, and pretty much any advice is welcomed. This is my first DIY kit. So please feel free to comment. Thanks guys.

That would be sweet! I'd love to drag my truck. Hopefully by then ill have my turbo project done and have it dialed in.

Ya I feel like the rear mou t turbo is a pretty easy setup. The main thing I'm concerned about is the oil getting to the turbo, I've read somewhere that if not done perfect it messes up the turbo, and with the turbo I'm looking at being water/oil cooled, how will that work? Should I look for a different non water cooled turbo? Any tips on the oil side of things? With the piping. I should only have cold side piping to plum if I'm thinking correctly. Since the exhaust is plumed already. I just put the turbo in between the y pipe, and muffler correct? So really shouldn't have anything on the hot side to really mess with, and I'm thinking with the cold side, I'm just going to follow the exhaust up to the headers. Then connect it to the intake Mani. I'm sure it's going to be a lot harder than I picture it in my head. But if everything goes right. I picture 2 tubes running side by side. (Exhaust, and cold side piping) turbo mounted just after the cab, since I'm a regular cab the distance won't be as far as if I was a 4 door. Or extended cab, so turbo lag should be cut down. But this oil thing is getting me a little worried, will I need a return pump as well, or just a pump to draw oil from the motor? Or should mount a 1L container under the bed to cycle oil to/from the turbo? I feel like that would be the best, oil lines would be half the distance, what do you guys think?

I was thinking of doing that. But I have never built anything. And I want the pride of building my own kit. Knowing that my mind, my hands, my build went into my truck. And the end product is because I figured out the code. You know?