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850 / S70 & V70 '96-'99 / C70 '97-'05 General Forum for the 850 and P80-platform 70-series models |
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850 tdi upgrade projectViews : 21461 Replies : 141Users Viewing This Thread : |
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Jan 16th, 2015, 18:15 | #1 |
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850 tdi upgrade project
Thought I would put a few build pics up as the engine work is just about finished now. My goal is to reach 230-240 bhp and somewhere in the region of 360 ft/lb of torque. I'm still putting a few miles on it before I go all out but my ar5e dyno says it's not far off!
Anyway the build: All the front end removed ready for the big intercooler. It seems there is even less space than a T5 to wedge a 3" one in but it is possible minus air con. Manifolds removed to make way for the 16t. After some swear words the 16t fits a treat. A custom bracket for the actuator had to be made due to the turbo being rotated. The oil feed and return lines needed modifying and I was quite surprised how much smaller the diameter of the c70 return line is compared to the tdi one. Going to see how I get on without water lines to start with, I have read up on it and asked several experts their opinion and they think it will be fine as a diesel runs a lot cooler. I will get more pics up over the weekend.
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1983 244 Last edited by martin_r_smith; Jan 16th, 2015 at 18:30. |
Jan 16th, 2015, 18:46 | #2 |
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Found some more pics..
The modified manifold ready to take a td04 16t, next to old k14 housing. It is surprising how restrictive the standard one is really. With the poorly designed wastegate setup of the standard k14 too its not surprising 200+bhp isn't really possible, believe me I tried!! Exhaust manifold pressure is huge due to the restrictions, so much so the exhaust valves cannot seat properly due to the back pressure. This is the manifold with the 16t on. I have used the old egr port to place a fitting for monitoring emp.
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Jan 16th, 2015, 20:00 | #3 |
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Been waiting for this for a while, looks like she'll be a monster!
Never looked down into the exhaust manifold but can see why its not so ideal. |
Jan 16th, 2015, 20:08 | #4 |
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She feels a monster lol. Once I've done some miles I will get the final mapping done and the engine work should be finished.........for now!
I've been driving an 850 T5 saloon whilst mine has been off the road and I can honestly say my diesel has a lot more pull. It may not be as fast (ie top speed) but is certainly quicker on the road.
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1983 244 |
Jan 17th, 2015, 11:40 | #5 |
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Update at last! Ace. I cannot believe how ridiculously restrictive the original manifold is? In your opinion is it possible to open it up a bit quite easily or is it on the limits?
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1995 855 T5 Manual 1996 855 TDI Manual Last edited by klunk; Jan 17th, 2015 at 11:45. |
Jan 17th, 2015, 14:04 | #6 |
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I've opened mine up a bit but you definitely wouldn't get any gains if your sticking with the standard turbo. A bigger turbo is a must to get any descent or worthy gains.
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