ok im going to buy the above turbo for my gq td42, but i was just wondering if there is anything i have to look out for/distinguish between them all besides the .64 rear housing. are they all the same if they are called a gt2860rs?
from what i have been told, a 2860 will more than likley experience an early death. i was also lookinh into a 2860, but am not going for a dts kit with the td05. perhaps look into that. from everything i have been told. it will out-last the 2860 roller bearing.
They are both good turbos. If after the TD05, ensure you get the 18g or 20g. You will like it better. GT2860RS - there are a few part numbers.
739548 - 1 which you can get with .64 & .86 turbine housing for GT2860RS
743347- 1 which you can get with .64 & .86 housing, but is GT2871R
Now260 with .64 is better low down torque but looses efficiency over 3300 rpm on most TD42's (diclaimer - according to flow charts and dyno's). 2860 with .86 is better for top and goes better for highway touring on a TD42.
The 2871 with .64 is about perfect with stock pump, no mods with incredible torque and doesn't loose efficiency until around 3800-4000 rmp on most TD42's. 2871 with .86 is more top end with a slight amount of lag at the bottom end.
I have two motors being built now, and selling one new one, and my old one will fund the one I keep, with a new GT2871R .64 hotside. I don't want to mod the pump or anything else, just want a good reliable, with a reasonable amount of bottom end pull.
and the fact that a 2871r on a td42 is a waste of time, the 2860 will outlast the 71r, mainly because of the ratio between the 2 wheels, you are using a very small wheel to turn a rather larger one and putting too much stress on the other components on the turbo. best option is for a modded td05 from united if you dont want the 2860, and marin quote me if im wrong but your 2860 lasted quite a while considering it was running out of its efficiancy range??? apart from that the 2860 is a good match turbo for low down power in the td42.
I'm about to book my new GQ (97 td4.2) into QDAD to have a DTS sytem installed, does the kit come with a td05? or is it a upgrade? Anything i should ask for with this kit - 3" exhurst obviously.