These two are the most popular turbos out there and lots of people are curious to how these perform in different trucks so hopefully this thread will get some participation. Which one are you running? Describe the spool and egts compared to your previous holset. Auto or stick?

HTB2 (+275 HP) - 450-525 HP 1050 ft. lbs. torque
HTB2/64 (+325 HP) - 500-550 HP 1150 ft. lbs. torque (KILLER B-2)
HTB2/66 (+400 HP) - 550-625 HP 1225 ft. lbs. torque (SLED PULLER 66)

Phat Shaft 62: (300HP-550HP)
Super Phat Shaft 62: (300HP-550HP)
Phat Shaft 64: (350HP-550HP)
Super Phat Shaft 64: (350HP-550HP)
Phat Shaft 66: (350HP-550HP)
Super Phat Shaft 66: 1994-2002 (350HP-625HP)

For a truck running 400+ hp worth of fuel it looks like any of these turbos a would work, so lets discuss their characteristics. The 62's are known to have very quick spool, but they get hot and might choke off some top end power. The 66's are known for being a top end turbo with little or no boost in the lower rpms and are known for surging problems. The 64 is somewhere between these decent spool and decent cooling. Then we throw in the super phatshaft turbos,...

So the sps series has a lot of extra work done on the hot side and a bigger wheel. The wheel would take more to get spinning, so the sps's are more of a top end turbo?

I'll start things off. My 64 is slower than stock to 10 psi but will quickly spike to 20-45 from that point. I can't make smoke at 30+ lbs of boost. Egts hit 1000 pretty easily, but its tough to raise egts quickly much after that.

We had a good thread about the b-1 so I'm hoping to get some info out for the next generation s300 modded turbos.

 

My SPS 62 act a lot like Ph4tty's 64. It's slower to 10 psi then stock, but once there, lights like a rocket to 45 psi (where the waste gate is set). Smoke clears to a light haze at 25-30 psi. Cruising EGTs are between 700-800* w/ about 3-4 psi @ 60 MPH. At wot egt's are @ 1500 by 80 mph

Randy

 

400 HP on my 95 and my EGT's get TOAASTY with the II 62/12 Instant 10-50 PSI, wastegate is set at 48 I can push it to 54

 

I've got the HTB2 62/12 and with the 125hp sticks and Comp box I hit 1500 deg by 80mph no problem.
crusing @ freeway speeds I run 8 or so psi. It will spool from 8-10 to 50 like the flip of a swtch.
I can smoke out a 4 lane freeway @ 60 mph i fI ease into the throttle but once it lites, BAM!!

I'm thinking I need to switch to the 64/14 so I can move more air at crusing speed and lose some of the top end restriction? I've kept it the way it is because I tow my Jeep through the hills once in a while and I was concerned with the 14cm housing I would loose some (more) spool up which wouldnt be good.



dan

 

I had a HTB2 62/12 fueled with 215pump and 370s and it was just a very little slower spool up then stock, but easily to live with, EGT's where up to 1500 before the 1/4 mile, (107 mph in the 1/4) Stick

how much slower is the 64 compared to the 62??

 

For the last three posters, how does the spool of the 62/12 compare to stock?

Randy care to share your experience with the sps66?

 

You'd lose boost at cruising speeds and you'd lose spool, but you'd see a good gain on top. Me, I want more spool and more on top and unfortunately I know that means lotsa $$$ =\

 

SPS 66 on a 2nd gen = , at least on my setup. VERY slow to spool to ~15 psi, above that it spools pretty well, but not near as fast as the 62. Street manners are very poor, and towing is out of the question because of surging problems. But as a strictly puller/drag truck it works well. The silver bullet was suppose to cure some of these problems, but I never got a chance to run one



Randy

 

Can someone tell me the compressor wheel size (??mm), exhaust wheel trim, and the exhaust housing a/r of these turbos?? I'm not familiar with the nomenclature of the turbos for these trucks yet, and I'll be in the hunt for one once my tranny gets upgraded.


K.

 

With my PS 62 I cruise between 700 and 800 degrees, when I get on it the temps will hit 1400 no problem, and Im boostin about 50 psi right now. It works great for towing, I dont have to shift down as often as I did with my HX-35. It spools a little slower than the HX-35, until about 10 psi then it spools pretty fast.

What is the difference between the PS 62 and the SPS 62? My turbo has an 80mm turbin wheel, so what does that make my turbo?

 

Can someone explain to me what the surging symptoms are like with the Sledpuller 66, i have one on my truck and it does not seem to surge, but maybe i dont know what the surging is supposed be like. With the mach 6 and the sledpuller i can run down the highway at 75 80 with about 4-8 psi boost and temps are around 800 and up to 1000 on a long grade hill, that is what i was seeing on my way out to Indiana. With the comp box on the turbo is not all that laggy, no more laggy then my Super 40 was.

 

CTD2001, I have a question for you- you dyno'd 480/880 before the injector swap and now 485/1087. 200 ft/lbs and 5 hp? I thought you'd have 500+ easily this time =\

 

I've driven a truck with one (HTT 62). It was probably close to 400rwhp at the time. The turbo, I thought, had maybe a lttle more lag than stock, but not much. It lights up very nicely. The thing I didn't like about it, was the way it sounds. More of a higher pitched whistle, that annoys me. The turbo on my Cat is quieter than that, and it is louder than my PDR HX40.

The same truck now has a 'gated 16 housing, and making over 450rwhp. EGTs are still an issue.

 

I think that i am easily over 500hp with these new injectors, i am not sure if you read the post that i made a few days ago about my dyno number and my impression of the dyno. I think that the guy running the dyno had the dyno setup wrong. I think he had it low ball reading number for my truck and for my buddies trucks. There is deffinetly more then a 5hp difference between these injectors and the old ones. The guy also told be that a mustang dyno will read lower then a dynojet, which i believe, but a guy i know said he made more power on the Mustang dyno that i was on (650hp) and less on Dave Dunbars Dynojet (633hp). I think the guy running the dyno was low balling us so we would spend money to buy stuff.

 

How well would a HTT 64/12 work on my truck for towing? The 40 can keep things nice and cool on the street, but have EGT issues towing over 55mph. Would the 12 be to restrictive on the top end with me having 4.10 gears?

If lag isn't really any worse than my 40, I'd happy. I suspect I'll be going to a small set of twins in the end. HX35/HTB3 setup.