12cm2 Turbo Housing Upgrade

[ktekst]

I am contemplating putting a 12cm2 Turbo housing on my d250 that I just put a diamond eye exhaust kit on that is stock other than this. If I do this I will probably do gauges and turn the pump up first.

If i were to put the exhaust housing on what gains would I see? Both if I don't turn the Pump up and if I do....

Thanks In Advance

[PRINCETON_JAKE]

I put a 12cm housing on mine and loved it, I also have other mods, the thing i liked was it eliminated turbo lag.

[ellis93]

I liked mine till the hx35 wizzed oil. One thing about it if u tow, get a pyro. Truck alone ur fine. If u pull with it temps will climb fast.

[Ptothej]

I put a 12cm housing on mine and loved it, I also have other mods, the thing i liked was it eliminated turbo lag.

I couldnt imagine how fast that would spool, with the mods in my signature, I dont have much for lag, but i suppose if I wast to watch how long it took to hit 30psi then I could see it, but for normal driving and rolling onto the throttle my lag is next to nothing with the 16cm2.. if i had my chance for minimal costs, I would love to try a 12!

[Richie O]

In my case with a 16 and stock timing there is no lag at all. My 21 on the other hand,, I don't think will light.

[Subliminal]

I swapped from a 21cm to a 12cm with the wastegate welded shut.

It's a little bit longer, so you have to work a little harder to get it on (I think I just had to pull the bolt to the transmission and then rebolt it up later).

That being said, it definitely spools a LOT faster. I used to get almost no boost until the top 1/2 of 3rd gear, now I can get a little boost in neutral...lol.

My EGTs didn't really go up at all. I don't tow heavy, but 80 MPH with 5k behind me was under 1k on the pyro.

I'd say do it...nice $50 upgrade.

[oldestof11]

It is my belief, that unless you are towing heavy, a 12 cm not only helps spool-up but also EGT's on a slightly modded truck. Reason being, it gets the turbo into its efficiency map quicker and with less fuel.

[Ptothej]

I swapped from a 21cm to a 12cm with the wastegate welded shut.

It's a little bit longer, so you have to work a little harder to get it on (I think I just had to pull the bolt to the transmission and then rebolt it up later).

That being said, it definitely spools a LOT faster. I used to get almost no boost until the top 1/2 of 3rd gear, now I can get a little boost in neutral...lol.

My EGTs didn't really go up at all. I don't tow heavy, but 80 MPH with 5k behind me was under 1k on the pyro.

I'd say do it...nice $50 upgrade.

50 bucks? I havemnt searched to hard around here but I havent found any good prices on turbo stuff! What mods do you have? when you say you can get a little boost in neutral, does that mean idling or reving it up? Cause I can get 10psi or just under by reving my truck in neutral, and last but not least wheres your probe sitting?

It is my belief, that unless you are towing heavy, a 12 cm not only helps spool-up but also EGT's on a slightly modded truck. Reason being, it gets the turbo into its efficiency map quicker and with less fuel.

Thats a good point, the power would be down lower, wouldnt have to rev it so much, and with less fuel should be lower egts correct?

[Subliminal]

My truck isn't really modded. I tweaked the pump and replaced the injectors with Bosch 190s..and the PO had installed a Magnaflow system that dumps out in front of the rear pass. tire. I meant revving in neutral. My probe is set in the manifold, right near the middle.

[dunes450r]

I swapped from a 21cm to a 12cm with the wastegate welded shut.

It's a little bit longer, so you have to work a little harder to get it on (I think I just had to pull the bolt to the transmission and then rebolt it up later).

That being said, it definitely spools a LOT faster. I used to get almost no boost until the top 1/2 of 3rd gear, now I can get a little boost in neutral...lol.

My EGTs didn't really go up at all. I don't tow heavy, but 80 MPH with 5k behind me was under 1k on the pyro.

I'd say do it...nice $50 upgrade.

why would you weld the wastegate shut? why not just plug off the solenoid that reads boost and activates the gate?

[Subliminal]

Well, first you're assuming that the wastegate wasn't welded shut when I purchased it from another forum member. Then you're assuming that the solenoid was included. Just tacking the flapper shut inside the housing seems like an easy solution to me...but then again...it was already done when I got it.

I guess my question for you would be why wouldn't a guy weld it shut if they never planned to use it.

[delinquent]

If anyone needs a 12cm housing, I've got a couple I'd like to part with!

[ktekst]

If anyone needs a 12cm housing, I've got a couple I'd like to part with!

How much for one shipped to Glenwood, IA 51534 ?

Pics?

And are they the short outlet?.... Somewhere I remember reading that there are short and long outlets and the long one moves the exhaust back possibly causing clearance issues.

[Douglas]

If anyone needs a 12cm housing, I've got a couple I'd like to part with!

And are they the short outlet?.... Somewhere I remember reading that there are short and long outlets and the long one moves the exhaust back possibly causing clearance issues.

I think there are three 'lengths' available, one stock WG housing with a 3' clamp on the WG cover, a non-WG'd housing that is the same length as the WG'd one with a V-band clamp, and a short non-WG'd that is the same length as any other of the OE non-WG'd housings.
cheers,
Douglas

[ktekst]

I think there are three 'lengths' available, one stock WG housing with a 3' clamp on the WG cover, a non-WG'd housing that is the same length as the WG'd one with a V-band clamp, and a short non-WG'd that is the same length as any other of the OE non-WG'd housings.
cheers,
Douglas

Ok. I only had seen the "longer" wastegated housings and the "shorter" non wastegated housings.