Dual ball bearing Gt14 or GT12, help me pick.

SleepR DSM · May 3, 2003

I've been researching this for days. I'm getting a dual ball bearging GT30 series turbo. I'm set on a GT series 56 trim compressor wheel.

But, I can't decide between these two turbo's. (below) Can you guys help me decide. I KNOW that the majority of DSM owners run relatively small turbo's, so most of the responses may point me to the smaller turbo... Regardless, I'm still looking for your input. What would you go with.
I have stand alone fuel management, 8.5 to 1 compression, 703cc injectors, a built bottom end, and a front mount intercooler in 3 months. My application is a daily driven car with AC, going to the track once a month. Lag has never bothered me in any turbo car I have ridden in. (up to 60-1 on a B18C-1 GSR)
I know.... why the hell can't I just pick one for myself?

From the many dyno charts I have studied on the net over the last few days, I'm guessing the GT12 will have what I call its M.B.P. (massive boost pull- or hit) from 3500 to 4000. I guessing the GT14 it going to hit from 3800 to 4300, to as late as 4000 to 4500.

What is your guess on spool? What would you go with?

Gt12, rated at 500 HP. I understand that if I subtract a hundred from those horsepower numbers, I’ll be closer to what I’m likely to achieve someday with every supporting Mod. = )
Part Number: 700177-0012
Turbine
Turbine A/R: Unknown
Size: 60mm GT30
Turbine Outlet size: 55mm
Turbine Trim: 84
Compressor
Compressor A/R: Unknown
Size: 76mm TO4S
Compressor Outlet: 57mm
Compressor Trim: 56

GT14 rated at 600 HP
Part Number: 700177-0014
Turbine
Turbine A/R: .70?
Size: 60mm GT30
Turbine Outlet Size: 55mm
Turbine Trim: 84
Compressor
Compressor A/R: 1.06
Size: 82mm GT40
Compressor Outlet: 61mm
Compressor Trim: 56

Bigfoot · May 3, 2003

Alot of us are waiting to see how the GT's perform in the new .69 bolt-on housings. Ask Slowboy about his new housing for the GT-12 and GT-13 and let us know what you find out. The 7cm housings are too small IMO. The Green outperforms it on pump gas. The GT-14 is not really a street turbo. Add Victory Performance GT-13 turbo to your list. CTC will build a GT turbo using the new housings too. FP 30-55 rocks.

anomalyinva · Oct 28, 2003

imma give this a lil *bump*

Victory · Oct 29, 2003

For those of you looking into GT turbos. The GT series turbos are great. They can make lots of power depending on which one you choose. However, I will say this about the VPEGT3040 (GT14 that your referring to). The compressor wheel and turbine wheel is not very well matched and that being said I will recommend going to the VPE3060 or VPE3056. Either of those would work more efficiently and produce better results both on the street and at the track. Another option is our GT3556. It will require an aftermarket exhaust manifold and our four bolt O2 housing but it will lay down the power. Huge power.

Scott

Ronin17 · Oct 29, 2003

I'd say the GT12 or FP3052. I love my GT10, but I think someday I will want alittle more power.

Picking a turbo is about the hardest decision there is, so many good choices out there. I'd call up all the vendors you are currently looking at and just talk with them and pick whatever one you feel the most comfortable with.

Good luck!

*edit*
lol, didn't see the date posted.

You ended up with the FP3052?

SleepR DSM · Oct 30, 2003

I'm not sure if you meant me Ronin17, but I did end up with a 3052. = )

Ronin17 · Oct 30, 2003

Yeah, I didn't even notice the date. Plus I saw a post you made in toptechnicians post on the FP3052.

So how do you like the FP3052?

SleepR DSM · Oct 30, 2003

I can't make an assesment yet. I can tell you its a work of art.. but nothing about it's peformance yet.

AWDTSI · Oct 30, 2003

I am also thinking of getting the 3052. Would you be so kind as to tell me If I need anything else to install it besides what I list: Tial 40mm wastegate, v-band downpipe, oil inlet line, oil outlet line, 4" intake pipe, 90 degree elbow, misc couplers. Does it use the stock water lines and can you use the stock oil drain pipe? Thanks a lot.

Ryan

SleepR DSM · Oct 30, 2003

Here is what I am using:
Stock water lines from the turbo but cut and then continued with rubber coolant hoses.
FP Oil feed line. They sent me the bolt that secures the line to the cylinder head. Their bolt has a restrictor in it.
FP Oil return line, looks sweet!
FP V-band clamp
FP 02 Housing
FP 4inch intake and fp Silicone couplers.
Turbo
Misc. Clamps
Tial 40mm
Air filter of course, with a four inch opening

The way this thing fits in the car... is beautiful. It clears the power steering bracket by a millimeter. It requires no denting of the main water pipe... by clearing it JUST barely.
It fits in the engine bay like your hand in a perfectly fitting glove.

AWDTSI · Oct 30, 2003

Excellent. Thanks alot. I am gonna buy the turbo and ask for most of the other stuff for xmas. I am gonna beg my whole family for just car parts.lol. I dont know if I can wait that long

. Could you please post some pics with the turbo installed when you get a chance. Again thanks, that list helped a lot.

Ryan

Dual ball bearing Gt14 or GT12, help me pick.

SleepR DSM

Bigfoot

anomalyinva

Victory

Ronin17

SleepR DSM

Ronin17

SleepR DSM

AWDTSI

SleepR DSM

AWDTSI

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