Single turbo for built 12 valve??

P

PRattenbury

Neophyte
Joined
Jan 28, 2007
Messages
1,095
Well, I've had such crappy luck with twins on my truck I am gonna try a single. I've got a balanced lower end, but stock except for fly-cut pistons, very lightly ported head with ZZFab intake, bigger valves, 60# springs, Ti retainers, HD locks, o-ringed, ARP 625 studs, 13mm pump with #5 plate, CDS 5KGSK, valet, 24* timing, .093" lines, 10x.012(?) sticks, big Scheid cam, Cool Twist CAC, triple disc DTT converter, billet DTT trans, 4.10 gears with Detroit Locker rear, ARB front, 325/50-20 tires (32" tall), 5" exhaust. I have been talking with coon smile about his turbo. Kyle has the patience of a saint. I keep hemming and hawing. I've also approached Engineered Diesel about this. They recommended a 66/71. They also have a lot of patience, and are good guys to deal with (I have one of their waste gates). I just want to get a single turbo that will work well with what I have for the occasional trip to Home Depot, to work, or to the track or dyno. That is to say, mostly a toy truck. No towing. With those particulars and intended use in mind, what would be the best option for a single turbo??? I only want to do this once (again).
 
Turbonetics 66mm 84a/r & a modded AFC box is what I run. Mid 11's at 6000lbs, & I have less fuel than you. Very streetable. supprisingly responsive for a big single.
 
I don't think a 66 is big enough for the fuel that you have. I think some sort of 71mm charger with a .80 a/r housing and external gate would be a good choice.
 
I would go for something bigger than a 66 aswell, Chris could get u going im sure!:Cheer:
Brandon
 
Would someone please ginny pig a tnetics t70 for me :p!!! I think this is a good option for you based on what a member indicated in spool characteristics (quicker then a bw journal bearing 66 sized unit).

p.s. I run the same turbo as Matt does and it works very well for me. Hope to find out just how good as soon as the tracks open up!
 
I've been reading about the T-netics chargers. It seems hard to tell what you're getting for a cartrige (ceramic ball bearing or not), for a flange (T3, T4). Anyone a vendor for Turbonetics on here???
 
Nick a T-70 on a 12V powerstroke conversion was been running for a while now, he bought a 13mm pump from me for it but doesn't post much if at all, he said it rocked and spooled way better than his old HTT Pro Street 66, he was thinking a T-72 as was I now that I have ran my T-66.

Jim
 
I was checking out the HP-72 and the Super HP-72. Anyone know anything about there? They're T-Series chargers, available with the T3 flange and ceramic BB cartridge.
 
If I were a better fabricator and I had more patience, I'm sure twins would be fine for me. I wouldn't deter people from going the twins route. With my 64/71 top charger combined with an ATS manifold, there is a clearance issue. The only way out of it I could see was using a thick spacer, like the one used with ED's external gates. The external gate is a great idea anyway, from a drive pressure standpoint. But between fitment and directing the discharge of the gate to the primary, that was gonna eff up my hot pipe (I'd have to make a new one). And, the cold piping I have right now is boogered-up crappe, which I was gonna have to build new. Then there was bottom-turbo mount issues. All this before chasing out boost leaks and the copious amounts of tuning to get a set of twins set up properly. If you don't mind the fab work and fussing over tuning and things loosening up, blah, blah, twins are terrific in theory. I'm too friggen old, cranky and busy with other things to deal with it all. I'm gonna try and stick with a simple single setup and dial my fuel back to suit, if necessary.
 
Jim Fulmer said:
Nick a T-70 on a 12V powerstroke conversion was been running for a while now, he bought a 13mm pump from me for it but doesn't post much if at all, he said it rocked and spooled way better than his old HTT Pro Street 66, he was thinking a T-72 as was I now that I have ran my T-66.

Jim
Click to expand...

Yeah Jim, we exchanged some information in the past on an old thread of mine. He more or less said the same thing you said. I think my 66 spools pretty damn quick for a 66 given having ridden in a 24 valve with a 62/72 bw unit that didn't seem to spool as fast to me as my 66 does.

IMHO I think these ceramic ball bearing chargers can really work well on these trucks given their lack of ability to spool a charger as well as a high rpm gas motor or some of the bigger diesels out there. This is all just my opinion though. I need to worry about more fuel before considering anything bigger I think.

Sorry to get off track.

dzlfarmboy is a vendor for Turbonetics. Sometimes it's difficult to get a good answer out of Turbonetics but if you get to the right sources you'll get a nice product. :Cheer:
 
PRattenbury said:
If I were a better fabricator and I had more patience, I'm sure twins would be fine for me. I wouldn't deter people from going the twins route. With my 64/71 top charger combined with an ATS manifold, there is a clearance issue. The only way out of it I could see was using a thick spacer, like the one used with ED's external gates. The external gate is a great idea anyway, from a drive pressure standpoint. But between fitment and directing the discharge of the gate to the primary, that was gonna eff up my hot pipe (I'd have to make a new one). And, the cold piping I have right now is boogered-up crappe, which I was gonna have to build new. Then there was bottom-turbo mount issues. All this before chasing out boost leaks and the copious amounts of tuning to get a set of twins set up properly. If you don't mind the fab work and fussing over tuning and things loosening up, blah, blah, twins are terrific in theory. I'm too friggen old, cranky and busy with other things to deal with it all. I'm gonna try and stick with a simple single setup and dial my fuel back to suit, if necessary.
Click to expand...

Sorry to hear about your twins issues. I have a couple of thick spacer flanges and a little fitting that makes it easy to attach the mount to the bottom charger. If you don't mind paying for the shipping, I could send 1 of each to you. I also have a hotpipe that moves the bottom charger forward a bit. First gens have more room in some places and less in others. It might give you some ideas. Another thing I started doing was making little connectors for putting the cold pipe together. Same size as the od of the pipe about 7/8" long turned down on each end for a snug fit into the pipe. They make it easier to hold the tubing in place while you tack weld it with the mig, and you don't have to worry about burning through into the inside. Singles are easier to put in, but always seem to run hot.
 
Last edited:
I may take you up on that. I haven't given up on the twins, but it's gonna take me a while to get them right. The cold piping is slip-fit exhaust pipe or something, booger-welded together. I'm going to buy butt-welded fittings and see if I can do a decently clean job on the welding. Practice first butt welding some pieces of straight pipe will help me get dialed in before doing the real work. The short piece of pipe on the inside is a good idea. Maybe take a piece of flat stock and roll it into the leading fitting, weld it, and fair it in. Then slip the trailing fitting over it and do the butt weld. Another old school welder's trick is to use a piece of flat copper on the back side of a weld. I bought a 1/2" (advertised, actually less than 7/16") spacer and ground a lot of meat off the ATS manifold, and still had a fitment problem. No worries, though. I just need to find the time to sit down and get it right. :)
 
I have some 7/8" spacers that might lift your charger up high enough. The bottom turbo mount welds to the long leg of the pictured oil drain fitting.
 

Attachments

  • spacers.jpg
    spacers.jpg
    64.6 KB · Views: 66
I don't sell them. I usually make extras when I make something and they don't do anyone any good sitting on the shelf. You can have it if you think it might help with your clearance issues.
 
turbo

i can get you any info you need about t-netics what do you want???
 
On the first post I describe my truck, and its intended use. The challenge is to flow as much air as I can without becoming too much of a lag pig. I'm fond of the Ball Bearing cartridge concept. Seems like much less friction than a journal bearing cartridge. I'd need a T3 flange, and HX40 outlet (that's the v-band flange outlet, right?). I imagine the challenge is finding the best housing and wheel combination. I will use an external gate. Most feel a tight A/R like .68 is the ticket to promote quick spooling. I hope I don't sound like too much of an idiot ( know I pretty much am). I've got tons of fuel, so I need lots of air. What say ye?
 
RonA said:
I have some 7/8" spacers that might lift your charger up high enough. The bottom turbo mount welds to the long leg of the pictured oil drain fitting.
Click to expand...

Have any spacers made up for divided T4? My plasma dude is a month behind.
 
You must log in or register to reply here.
Back
Top