Engine/Transmission (1994 - 1998) Smallest Twins setup.

[NHays]

I have the super B, I like the turbo, but its has a really lazy spool up. I am wondering what is the minimum HP requirements for twins. I am pushing under 400 hp and do alot of towing. Can I use the old HX35 turbo for the top. I was also wondering if yall know any sites that have good pictures of the plumbing and mounting of twins. I have heard awesome things about how fast they spool at low HP levels. I will be running about 45 psi boost max. I have an EGT concern and was told twins solve this.



Thanks for the info. Oo.

 

[Matthug]

Keep the turbo, send it to HTT they can put a 12cm housing on it for a couple hundred bucks. The Super B comes with the 14 housing I'm pretty sure, the 12 really spools it up better with minimal choking up top thanks to the dual port wastegate. Heck, some guys run the HTB2/62 with the 12 housing!

 

[NHays]

keep the HX35 and get the housing, or the super b. I have both chargers. Can I put twins with these turbos?

 

[bmoeller]

I have both chargers. Can I put twins with these turbos?

No, you can't.

 

[Matthug]

No keep the Super B, sorry for the confusion. No you can't make twins out of that you would have to buy an HT3B to use with your 35 for twins, about $700 for an HT3B then you need all the plumbing.

 

[NHays]

Ok cool. I just had the engine rebuilt, and they put in a luk oem clutch. I had to turn the fuel down alot. On my way through the mountains to come back to OK. I had problems spooling the super B up, I was empty on the trip and had higher than normal EGTs. I also cannot get it past 30 psi boost. Am I just not putting enough fuel to it now. My main reason for getting the Super B was towing, at least I was told it was a good towing charger, thus far I am unhappy with it. Is the HT3B smaller or larger than Super B. What is the best low HP towing twins setup.

 

[Matthug]

You have to understand how twins work, the HT3B is only used as the lower turbo. It's far too large to spool as a single, but thats what the HX35 up top is for-immediate boost response but the HT3B is there to take over once the 35 runs out of steam.

The Super B comes with a 14cm housing for upper RPM breathing, swapping to the 12cm housing will aid in lower RPM response and way better towing manners and controllable EGT's with minimal loss in the upper RPMs from the smaller housing. Please note that the super B is a schwitzer turbo not a holset, so if you see a 12 cm housing for sale it's usually from a holset HX35. You need to send your turbo to HTT and have them put on a 12cm housing, they will exhange it for your 14 housing for probably about $200.

 

[FordCummins]

I have a Super B with my setup and the thing lights almost instantly. I can reach the wastegated 42psi with no troubles at all, and am really looking for more air when hotrodding around town. I think it does a fantastic job towing, and keeps my EGTs well within check for everything I do. I cant believe that it wont light up well for you, but I can tell you from experience that with enough fuel it will really spool quickly, and stay spooled.

 

[Matthug]

Here's a good deal for an HT3B-

http://www.citydiesel.net/bht3b-turbo-p-85.html?cPath=32_34

 

[thekidfan]

I'm with ford cummins, you have other issues, most people that don't like the super B disslike the top end, spoolup with that turbo on a modded truck is quicker then a stock truck with a 35 by far.

 

[MRector]

My super B is also a PIG on spool-up(up to 10 psi-ish), after 10 psi it will IMMEDIATELY wrap the gauge to a peak of 46 psi then settle at the gated 40-42? psi--whatever they are set at from BD.



My truck is an automatic and the super B couldnt hold a candle to the lightning fast spool-up of my HY-35 with the 9 cm housing!!---BUT... the HY couldnt keep egts under 1700-1800 degrees on a hard top gear acceleration, with the super B and more fuel I have seen a peak of 1350

 

[RonA]

If you are looking for a towing setup, or don't mind the 475 to 525hp range, there are some other turbos that spool better as a primary and work very well. A slightly smaller (70-71 mm compressor wheel) S400 or K31 shows boost at freeway speed and is very responsive up in the hills. It will pull down into the 1500 to 1600 rpm range if needed. Not a great turbo for a dyno truck, but alot of smiles as a daily driver.

Ron

 

[NHays]

Ok, sounds like I have a problem. I have had this idea in the back of my mind for a while. I have the waste gate totally closed off, and I still cannot get over 30 psi. Do you have an idea what the problem is. I thought maybe the clutch is slipping and not loading the engine, but that does not make since.

 

[FordCummins]

If the clutch was slippin, you'd know it.

 

[NHays]

What if I have bad delivery valves. I have the timing at around 20* advance to compensate for this. would that change things. no the truck is not really clattery, it sounds normal. and gets about 19mpg

 

[NHays]

Oh, I can make the clutch slip most deffinatly. It was really bad after they put the LUK clutch on the new engine with the plate almost all the way foreward. I had to slide it back and turn star wheel. :{. I am needing a new transmission, and I am going to put a six speed in with southbend Con OFE. I liked that clutch before.

 

[Matthug]

Sounds like you could have problems with your AFC or atleast the line going to it. Check the boost signal line to the AFC housing for leaks.

 

[NHays]

I don't have the steel line that goes to the AFC from the turbo, all I have is the little black plastic line that comes from the manifold, is that enough. I will check and see if its cracked or something. Does the housing need to be full foreward for the modified plate? I moved the housing back to control smoke. Its about in the middle now, or should I have the housing foreward and the star wheel back?

 

[NHays]

Ok. I moved the AFC housing all the way forward, and put the star wheel almost to the end. I have more acceleration and smoke as usual, but still cannot get boost above 30 psi. only just a fraction over. I now have very light grey smoke under heavy throttle. will check for leaks this weekend in the induction system. I am leaning toward not getting enough fuel. obviously. unless there is another reason.

 

[Matthug]

Yup still sounds like the AFC arm isn't moving. You have a little more power because you moved the whole housing forward which allows the governor arm to go forward more. I replaced my entire AFC line with 2 brass 1/8'' NPT - 1/4'' barbed fittings and some 1/4'' vacuum line.