Big Singles??

[fergavs]

What are people using for large single turbos? Something to support 500+ hp. I was looking at the BD Special B which says 80lbs/min of air flow and 550-625rwhp. (I'm dealer )I believe it is a 62mm comp wheel and 14mm exaust housing. I believe it is basically the same as a Super PhatShaft 62 from industrial injection. I see some on here use 64 or 66mm turbos. How are the larger turbos to spool? I have the parts coming to supply the fuel so i need to get the turbo ordered!!

[CumminsPride]

Is it a DD? The 66's are usually pretty surgy on the street but man they make some nasty air. I wouldn't run any less than a 64/14 S300 on 500
HP and I still doubt you'll hit that on that single.

[roxxx]

Dealer huh

[bgilbert]

Step away from the sissy stuff BD sells if you want to make horsepower. I wouldn't even put any single BD charger in the conversation of big singles. I don't consider a 66/65 a large single. Maybe a 66/71 or anything with a 2.8 or 71mm compressor wheel and larger. The 'Sledpuller 66 on both my trucks, one 5sp, one auto, both would skyrocket into orbit like a small charger. It had the 65 turbine wheel with 14cm housing. I'm sure one with the bigger turbine wheel would be slower, but would drive harder and make more power.

I've run a Pro52 on both trucks as well. It's a 2.8 compressor, ~3.0 turbine IIRC, with 16cm T4 nonwg housing. More like a 21 housing in T3 foot. On the 5 speed it didn't like til about 2000rpm, with the auto it's instant. I wouldn't recommend it for a stick, but auto it would work fine IMO. I got it at a good deal, knew the history on it, was like new etc. I wouldn't pay the top dollar they go for now. I would look into one of the 2.8 s400 T4 chargers available now. One can be had for around $1200+-.

Keep in mind these are competition setups and I have no idea how they would tow. Probly not well.

[fergavs]

Bgilbert,

I'm surprised those turbos light so easily. I have searched all the major diesel shops(HTT,BD,PDW,ETC.) and they all claim 62mm comps w/14mm will support 500-550hp. Barely anyone posts higher numbers then 500hp on the forums so why is it that you are using such large chargers. Does your truck make over 550rwhp? If not then couldnt you use less turbo and have it light faster. Is it something to do with our truck/fueling that it prefers a bigger comp.

I have seen your vids and now your truck performs but why do all the major shops reccomend less turbo?

[Philip]

why do all the major shops reccomend less turbo

They are in the business of selling turb's. If eveyone bought a big one the first time the sales would fall off. Sell you a small one first. When you find it isn't big enough. Then they sell you a second one.

I just installed a Super HX40. If I would have known better I would have just went the 40 the first time instead of getting a HX35 first.

[89silverbullet]

fergavs,

what kind of numbers are you looking at with your current mods? just curious

[SChandler]

The are a couple things to consider for those horsepower ratings. The first is that the ratings are for 2nd and 3rd gen trucks. They fuel differently (as you guessed) than the VE does. From reading various forums, the VE seems to like more turbo than the conventional horsepower ratings suggest. The second thing is that those ratings are for the ragged edge of usability. You wouldn't want to tow heavy (or be able to) with those turbos at their max. horsepower rating.

[seeker1056]

I am about tot install a ProStreet 66/14 so we will see how that one works with lots of fuel

I plan to run it as both a single and as the secondary on twins.

[GLHS]

From what I understand; Bd Super B special = I.I. sps 64 which = a HTT "71 series" 64. They all have the 64 compressor wheel and 71 turbine wheel with a 14/.80 turbine housing.
I run a 62 wheel which is about all I can get away with here at 5300'.
I was at TDRs May Madness in Pahrump NV 2600', and it was a HUGE difference in spoolup. Would not be afraid of running a 64 compressor wheel there or at lower elevation. Nearly could not lug it there.
I think a big factor is elevation. Most people forget that under zero boost conditions your CTD will act like a naturally aspirated engine at any elevation.
I tried and only mustered 1450 on the pyro down there. Here I can get it to about 1600.

[fergavs]

Trucks 3 weeks from being back together so no dyno sheets yet. Hopefully everything will hold together and I'll get around 500hp. Of course I'm only bench dyno guessing.

Well I'm at 2200ft here so I think the Special Bee is gonna be the right turbo to try. If it is a 64mm wheel (I'll ask right away, they dont give out a lot of specifics) then that should be enough turbo I hope. I'd like to still be able to tow a little. I have the Super Bee now and it is awsome for Pods/BD 60hp injectors and the std. pump mods. Made awsome power and big boost at aprox 45-48psi but now I should have a fair amout more fuel available.

Anybody else using a 64mm+ wheel? Are you happy with spool up and power? Do you get any surging or have you used it to tow at all?

[GLHS]

I see you also have a cam.
You should have no trouble with a 64.

[fergavs]

I spoke with BD and the Special is a 62mm comp with a 14cm exaust and a 71mm wheel in it. So I have some thinking to do. I would still like to hear from some people running a 64mm+ comp wheel.