Mine used to look like that (when it came off of the truck lol) I wish, the weather here is to inclimate for that stuff, my turbo used to look like that too,, not so much anymore

Kevin

 

Looks pretty sharp, I wish my engine compartment was that clean but I'll have to wait til the weather gets a little nicer here

 

I think the divider is the "dual vein" set up they advertise. I think it is to help it spool quicker, but I could be wrong.

 

Exactly...you nailed it on the head. The stock manifold has a divider, but the stock turbo doesn't....DUMB! BUT, since the turbine is so dang small on the stock turbo, it spools crazy fast without it. If you check out most decent sized aftermarket turbos, even for gassers, there's a divider.

I'm sure 55 psi out of a 71mm turbo is amazing...I just don't have the patience to wait for it every single time I shift.

Without ARPs, I am not going to attempt to push over 50 psi. I might give the actuator rod another 1/2 turn to get closer to 50 psi, or just get a boost controller for it.

 

Thanks! it helps not daily driving it too! I've only got 7400 miles on the truck

 

Look at the 6th pic down on the first post, it looks like there IS a divider.

 

Do you mean on the stocker? there isn't one on the stock turbine, but there is on the manifold (even though it's hard to see on the manifold photo). The ATS manifold has a divider like stock.

Also, what looks like a big turbine opening on the stocker, is not the entire opening...the gasket is much larger in diameter than the actual opening, so a good 3/16" around the black hole in the photo is part of the flange, not the opening, making the stock inlet of the turbine much smaller than it appears.

 

I would drive your truck for a while...and if your headgasket lives for another 10k at 45 psi...turn it up to 50...then try 55 psi if you have enough fuel.

I have almost 125k on my headgasket with daily boosts of up to 55. Maybe I am lucky. I have heard that 04.5 and up let go a little sooner because of the larger valves...so maybe 50 should be your max without studs.

A 71mm is not for everyone...and a 62/14 is for most everyone. I think you made a great choice.

Go drive!

 

Cool....thanks for the info! I'll leave the wastegate alone for now then since it spikes to almost 48 psi in 6th gear, and mid 40s in lower gears. I would rather put ARPs in it BEFORE the gasket lets go, so I'll keep things conservative for a while until that happens. So far, I am very pleased with the turbo choice...it seems just right for a street driven 6 speed truck.

 

cquestad what did you mean by a 71mm is not for every one...and a 62/14 is for about everyone?

Isnt the silver and sps 62s both 71mm?


Rob, good to hear you are happy with the turbo, I have been tryin to wait but if HTT doesnt come out with their new turbo soon sps62 it may be for me.

Also how likely is it that 45psi will blow the head gasket with that turbo?

I was plannin on turnin mine up to 47-48 when I got it as my truck has seen 44 daily with the stock turbo and spiked over 50 before.

I dont want to spend the $ on studs, not right now anyway so any info would be great.

 

I always thought the 62 in 62/14 is for the 62mm diameter of the inducer of the compressor wheel?? So a 71mm would be like a "71/14".

You should be very pleased with a SPS62/14. I don't have anything to compare it to, but I am very pleased. After putting about 300 miles on this turbo, I don't even notice the super slight delay in boost response over the stocker.

 

Nope...62's are exactley that...62 mm on the cold...compressor...intake side.

62/14 means...62 mm dia on the cold side (intake) and 14 mm dia on the hot side (exhaust).

72/16 means...you get it.

 

The 71mm is the size of the turbine wheel on the superstock 62 by HTT which I THOUGHT was supposed to be comparable to the sps 62 by II. For referance the older style 62 by HTT the HTB2 has a 65mm turbine wheel.

So is the sps 62, 71mm on the hot side?

nevermind, just saw your post (cquestad)

 

Well, that's kinda accurate. There is nothing that is "14mm" on the tubine housing... it's 14cm2 "14 centimeter squared". The first number is the inducer diameter of the compressor wheel, which is the ID of the inlet where the compressor wheel sits. It's really just a generic way of describing the turbos since there are other numbers, like wap mentioned... 71mm might be the exducer size of the turbine wheel. There are also A/R figures on both the compressor and turbine housings that is rarely discussed w/ diesel turbos. We all kind of leave it up to the turbo companies to provide the right sized turbo for our applications. With gassers, there's a ton of combinations available when choosing a turbo...both wheel diameters or trim and the a/r size of both compressor and turbine housing can create a very large number of possible combinations. Not to mention the style of turbine and compressor housings, like T3/T4 flange, T25 flange, internal or external wastegate, ect, ect.

 

I was not trying to get too complicated...cause it is even more complicated than that. A/R's, housing sizes, turbine wheel sizes, etc. Sorry for my redneck response.