i was just wanting to know what my 93 has for a stock turbo? is it an hx35? i would like to do twins with the stocker but id first like to know what i got and how i can tell.

 

Stock equipment=Holset H1C. If it's in good shape, an H1C with an upgraded compressor housing like those available from HTT and Gilette Diesel would make an excellent candidate for a secondary in a set of budget twins. If mine ever runs again that's the direction I plan to go in...

 

the compressor housing like the 16cm one? what about compressor wheel upgrade? or it dosent have to have it to run the duals? if i did would a s400 work well in this set up?

 

Its the 18.5cm exhaust housing. I forget the specs on the HTT compressor upgrades but I do know Gman07 has the stage IV on his and seems to like it.

 

S400 would work good, but you'll either need a gated housing or an external gate (preffered). If you don't have an internally gated turbo to begin with you'd be way ahead of the game by starting with an external gate from the get go in a set of twins.

 

ILikeBikes is right on the money. The S400 or an HT3B are both excellent bottom turbos. When combined with an external gate you can keep the whole thing together. Without it your headgasket will no longer be of much existence.

 

so the bottom turbo would need to be wastegated, what about the main stock one? i plan on putting a 16 cm housing on it, but would i have to get a waste gated turbo for the top to or no? just the bottom to control the psi?

 

No, the top turbo (secondary) is the one that has to be gated. The bottom turbo (primary) doesn't have to be gated unless you're running too much boost out of it. If you're going with twins, I would run the smallest housing up top to keep fast spool up, such as a 12 or 14.

Edit: the idea is to gate the top charger right into the bottom charger to help light it.

 

ohh ok, so i can still run my stocker as the primary, the one that hangs off the secondary? and waste gate the secondary, and the secondary would be the 12 or 14 cm housing right? and then i could put a 16 cm housing on the primary one, whitch would be my stocker, then id have to do a oil return to my oil pan, and then get 4" tubing and 3" tubing to run all my intakes and exhaust housing and such. then turn down the boost some till i get head studs, hopefully after i sell my second money pit, now please clarify me if i seam to be missing anything?

 

because i can see how it's all set up on th epictrues and in my head, just dont know wht some of the parts are called for the tubing, such as the one from the exhaust housing of the secondary to the primary turbo

 

Primary = large, or bottom turbo.
Secondary = small top turbo.

You can't use your stock turbo as the primary, its way too small. Use your stock turbo with a 12 or 14 housing for the top turbo and either internally gate it or externally gate it.

Your 16cm housing will not fit on a primary turbo.

 

I think you're a little confused.

If you want to use your stock turbo as the basis for twins, get a 12 cm wastegated housing and a compressor upgrade for it to make it into a hybrid. You flip the manifold and bolt the hybrid to the manifold. Figure out a good way to mount your HT3B/S400/other big turbo. Run the exhaust from the top turbo into the bottom turbo. The compressor on the bottom turbo blows into the intake of the top turbo.

The top turbo needs to be wastegated to keep it from doing all the work.

 

The part from the secondary into the primary is called the hotpipe. The piece that goes from the compressor outlet of the primary into the inlet of the secondary is the cold pipe.

If you're going to build your own twin setup, I hope you're going to get much larger injectors. For the amount of fuel you have now you'd probably be fine with a hybrid turbo. Infact, you may even lose power if you ran twins with how much fuel you're pushing now.

 

That is a very good point.

 

I hope this will help clear up some of your confusion! Here's a pic of my turbos getting mocked up on my junk 53 block:



The turbo you see on the top is called the secondary. In this case it is the stock H1C, with a hybrid kit on it and a wastegated 14cm housing.

From the back of that turbo, the main 90* going into the bottom (or primary) turbo is called the hotpipe. Please note that this picture was taken before I cut into the hotpipe for the wastegate.

The turbo on the bottom (the primary) is from a semi truck. This turbo is a BHT3B with a 26cm housing.

From here, the big turbo compresses air and stuffs it into the top turbo. This air goes through the cold pipe, which is the piece that is made of 3, 4" 90* aluminum elbows that are welded together.

The outlet of the top turbo (which is now carrying the compressed air from both turbos) goes into the intercooler and then into your engine. Then you lift your head .