Alright I've been talking back and forth with everyone from diesel shops to the turbo makers them self and I can't seem to get ONE person to agree with another so whats up?? Look hears the deal you all can see whats in my sig I'm adding a south bend DD in the next week or so and my next step is for a turbo. Ok so I tow a lot 3-4 times a week about 6000-10000 lbs depending on how many horses are in the trailer but I still want to be able to play with my truck so my goal is to get around 550hp by the time I'm all done I am aware that I might need bigger sticks down the road to reach that goal we'll just have to see. So which turbo will best suit my needs? I've been leaning towards the Silver 62 but I don't know some say sps62 or 64 12cm or 14cm some say ps62 or 64 and others say HTT62/13/71 but others come back and say that the silver 62 is better than the HTT 62/13/71 and that HTT's is a weak attempt to copy the silver 62.Last there are those that say only way is twins but that gets REAL costly! So if you can help with your experiences or what ever else I guess I'm game for anything at this point cause I feel like everyone out there is just trying to sell me THEIR dang turbo So some info from non sales people would be greatly appreciated! Thanks

 

If it was me i would go with the twins. i think with a single turbo and 550HP+ towing 3-5 tons your exhaust would be quite hot. someone correct me if im wrong.

 

I would have to agree. I have towed 6k with my setup and going into a good wind it gets kinda hot. The setup I have got me 575hp or so. It works but I wouldnt want to tow more than that with it. Twins will cool the best at that power level or bring the power level down and run a 62mm turbo from whoever, it dont really matter. The Silver 62 will cool a little bit better on the top end than the rest but will also spool a bit slower. I have heard lots of good results from the HTT 62/13ss. You could run one of those turbos with your setup and keep your setting mild and tow just fine I would imagine. Forrest got 520hp off his sps62 so the power can be had with a smaller turbo.

But yeah, if you want to tow with big power, twins are the way to go. BD twins are relatively cheap(as far as twin setups go) and cool very well and will make 600hp pretty easy.

 

I would just get a 62/13SS from HTT, it should spool well and tow at 400ish HP and handle 500+HP with everything set on kill. IMO you shouldn't tow at more than 350-400hp anyway, it adds way to much stress to the drivetrain IMO. Forrest had an EGT of about 1700* at 4Krpm's with his SPS62 and put down 534hp and a hair under 1200 ft. lbs. I think that a 24v would have less EGT's at top rpm because it would be 3200-3400 as opposed to 4000...

 

I'm sorry for the confusion my fault, I'm not looking to tow with the truck set a around the 550hp range I will turn the mods off and keep the power level a lot lower for towing but I want to put everything on kill when I'm not towing and be able to get 550 or so. So would twins be better or that silver 62 I do realize things will be a bit laggy when towing at the start just as long as it doesn't get to hot before the turbo lights tough to meet all needs I know but just want a good reliable turbo that will fit most of my needs unfortunatly twins are pretty pricey and there hard to find used in my price range of a couple grand.

 

As far as the 62's go you're looking at the same compressor with different variations of the turbines, housings, and wastegate designs. The htb2 or phatshaft 62 would have the smallest turbines which should be quickest to 10 psi due to the lower mass of the smaller wheel. The super 62 from either II or HTT has the 71 wheel and wastegate mods for more flow. Industrial's uses a custom housing of some kind on their supers while HTT offers the 14 or their new stainless steel 13/16. The silver bullets use an even larger turbine than the super lines and to my knowledge HTT doesn't offer anything comparable.

I've heard a lot of good things about the silver 66's and I'd think the 62 version would spool even quicker down low with the smaller wheel on there. The question is how well it'll cool at 550. The sb66 is supposed to be very well mannered.

Its becoming harder to justify twins now a days with the new lines of singles availible. Both Forrst Nearing and Dave Dunbar went from twins to super 62's with good results.

 

I really like large turbine sides. A bigger turbine wheel does a lot of good things.

I didn't know that the silver series from II used a 74mm wheel. Now that I know that, I'd favor them over the HTT 71mm turbines.

For towing, the HTT is probably a better choice however, because the 71mm wheel allows you to get a 13cm housing, whereas the II turbos with the 74mm wheel require a larger housing that will have a higher boost threshold, which you do NOT want when towing.

jh

 

I agree...

 

Turbos are a compromise..... To get to 550 RWHP with an HO engine you are going to be pushing it, but it can be done. As mentioned above twins is the best route but if you would drop your HP goal by around 50 HP then lots of good options are open.

In this range going with a 62mm turbo would work best (with boxes off while towing). The SPS62 or the HTT-71 or HTT-71ss. All of these turbos are similiar and will work well. The Silver 62 is a nice turbo but personally unless you are running nitrous the large turbine in this turbo is overkill for a 62mm compressor.

Doug

 

So the higher boost threshold while towing will create more heat? and if the mods are turned down while towing won't that make any larger turbo laggy? I guess I'm still confused HTT62/13/71 or Silver 62 ??????

 

Yes you will loose some spoolup with the boxes down, but a 62mm turbo will spool fine around 400 RWHP. For your application I would go with the 71mm turbine turbos, so the silver 62 would be out. Spoolup will be markably slower with that large turbine and the lesser fuel.

 

Doug-- would the Silver 62 be a better option if twins are possibly down the road? I suspect the larger turbine section really helps in a compounded application, as the need to bypass less flow around the turbine increases efficiency.

Or am I full of it?

I know I want a 62-class turbo, but which hot side I want is the real killer part. Right now I'm of the mind that I can't take advantage of the larger Silver hot side because of my fuel-limited HO-- so why give up the spool?

An Htt SS62 with the stainless 13 housing seems to be the perfect charger for me.

Justin

 

Hohn,

The silver would work well with larger twins.... We have been doing some testing and have learned a ton about what housing work best with twin setups. What guys have used for years probably will be changing over the next 24 months as improved turbine and compressor housings are tried.