DBB mini
10-01-2006, 06:53 PM
Ok so I started this thread some time ago & it magically disappeared. Nice. Basically, the Garrett GT DBB series of turbos offered on ebay, ATP turbo, Himni racing, etc. are not offered with a Chrysler flange scroll. The only way I know to get one with a Chrysler flange scroll is to order one from Chris @ TU. Chris only sells the turbos complete with the Chrysler swingvalve, he does not sell the scroll seperately. This means that the GT series offered by other vendors won't bolt up to a stock manifold. I cannot say whether the turbos offered by TU will bolt directly up to a stock manifold, you'd have to ask Chris. Maybe someone who has purchased one from him could chime in & verify it?
The Garrett GT DBB series turbos do not have a rebuild kit available to the general public. I've sent several emails & all have the same reply; not offered. Mine is currently under warranty & I haven't had a problem out of it. I just wanted to do some research & I want to let all know what I've found. This is not an absolute fact, only the information I have gathered at the moment. Turbine wheels, shafts, seals, etc. are not offered to the public. If you see one on ebay or for sale that needs rebuilt, PASS it up!! I'm pretty sure you could send one off to Garrett to have it overhauled, but don't quote me on that. Garrett told me not to worry about it, they stand behind my vendor.
The Garrett GT DBB series of turbos require new coolant & oil feed lines. The stock lines will not bolt up. Most of the GTs have a 14mm banjo style coolant feed/return. I used a -6AN to 14mm banjo adapter, they work great. The oil feed requires a restrictor, as the GTs don't need as much oil pressure & the seals are supposedly a low pressure seal, could possibly blow under full oil pressure?? I used a restrictor adaptor to -4AN for the oil feed. All works great. One note:My oil feed supply is very difficult to get to on the vehicle, nearly impossible. I had to make my own special cutout socket to fit it. Crowsfeet socket would not work, space is too limited. I reused my oil return flange from my mitsu, had to drill out the bolt holes to fit a 8mm bolt. This was on my GT2871R, it does not mean it will work on all GT series turbos.
The Debated subject on the original thread was whether a T3 .63 AR housing could be machined to fit a GT series turbo. My conclusion as a machinist is NO. I've checked the dimensions & it just won't work in my opinion. I believe Chris also verified this in the previous thread as he is possibly having his own Chrysler turbine scrolls casted. Doesn't really matter how he is making them work, I just don't want anyone thinking they can have the T3 flange scroll machined to fit. Want a Chrysler flange GT DBB turbo, buy it from TU. A few posted that it could be machined, but no pics or proof to back it up.
I purchased a GT2871R 56 trim, .64AR turbine hsg/internal wastegate. If I had it to do over again, I'd go with the .82AR or the .86AR housing & an external wastegate. These turbos spool super fast, unbelievable, so I will be going to the larger AR & the external wastegate. On my particular turbo, I feel it needs more exhaust flow & the larger housing & external WG will definitely help that. An external winds up costing close to the same, but is more of a hassle to plumb in.
I had to make my own downpipe$
I had to purchase the wategate actuator, bracket, swingvalve extra$$
I had to purchase -AN lines, fittings, etc. $$$
I had to purchase a header, then put a custom flange on it myself$$$$$$
All in all it cost more than I anticipated, but it is definitely WORTH EVERY PENNY! All replies are welcome.
The Garrett GT DBB series turbos do not have a rebuild kit available to the general public. I've sent several emails & all have the same reply; not offered. Mine is currently under warranty & I haven't had a problem out of it. I just wanted to do some research & I want to let all know what I've found. This is not an absolute fact, only the information I have gathered at the moment. Turbine wheels, shafts, seals, etc. are not offered to the public. If you see one on ebay or for sale that needs rebuilt, PASS it up!! I'm pretty sure you could send one off to Garrett to have it overhauled, but don't quote me on that. Garrett told me not to worry about it, they stand behind my vendor.
The Garrett GT DBB series of turbos require new coolant & oil feed lines. The stock lines will not bolt up. Most of the GTs have a 14mm banjo style coolant feed/return. I used a -6AN to 14mm banjo adapter, they work great. The oil feed requires a restrictor, as the GTs don't need as much oil pressure & the seals are supposedly a low pressure seal, could possibly blow under full oil pressure?? I used a restrictor adaptor to -4AN for the oil feed. All works great. One note:My oil feed supply is very difficult to get to on the vehicle, nearly impossible. I had to make my own special cutout socket to fit it. Crowsfeet socket would not work, space is too limited. I reused my oil return flange from my mitsu, had to drill out the bolt holes to fit a 8mm bolt. This was on my GT2871R, it does not mean it will work on all GT series turbos.
The Debated subject on the original thread was whether a T3 .63 AR housing could be machined to fit a GT series turbo. My conclusion as a machinist is NO. I've checked the dimensions & it just won't work in my opinion. I believe Chris also verified this in the previous thread as he is possibly having his own Chrysler turbine scrolls casted. Doesn't really matter how he is making them work, I just don't want anyone thinking they can have the T3 flange scroll machined to fit. Want a Chrysler flange GT DBB turbo, buy it from TU. A few posted that it could be machined, but no pics or proof to back it up.
I purchased a GT2871R 56 trim, .64AR turbine hsg/internal wastegate. If I had it to do over again, I'd go with the .82AR or the .86AR housing & an external wastegate. These turbos spool super fast, unbelievable, so I will be going to the larger AR & the external wastegate. On my particular turbo, I feel it needs more exhaust flow & the larger housing & external WG will definitely help that. An external winds up costing close to the same, but is more of a hassle to plumb in.
I had to make my own downpipe$
I had to purchase the wategate actuator, bracket, swingvalve extra$$
I had to purchase -AN lines, fittings, etc. $$$
I had to purchase a header, then put a custom flange on it myself$$$$$$
All in all it cost more than I anticipated, but it is definitely WORTH EVERY PENNY! All replies are welcome.