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Volvo 850 t5 conversion

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

Seany27
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Year and Model: 1995 volvo 850
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Seany27

Re: Volvo 850 t5 conversion

Post by Seany27 » Fri Feb 16, 2018 3:11 am

It's not exactly a unique set up, if you look at the wiring for fenix 5.2 and motronic 4.3, they share pretty much all the same contacts. I have put in the T5 harness, and it sparks, I believe am not far off, maybe something as silly as a wire missing or situated in a different place. I also believe there is someone out there that knows this, but hasn't seen this post yet

Seany27
Posts: 47
Joined: Thu Dec 14, 2017 12:55 am
Year and Model: 1995 volvo 850
Location: Desertmartin
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Seany27

Re: Volvo 850 t5 conversion

Post by Seany27 » Fri Feb 16, 2018 3:15 am

I've just paid £800 for a mitsubishi galant vr6 ralliart edition 94 of 200, needs tlc, but people are already trying to buy it of me, I won't be doing a vr4 conversion though as gonna keep it standard, though there are people who can do this successfully near me

tryingbe
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tryingbe

Re: Volvo 850 t5 conversion

Post by tryingbe » Fri Feb 16, 2018 5:31 am

Seany27 wrote:
Fri Feb 16, 2018 3:11 am
It's not exactly a unique set up, ... I also believe there is someone out there that knows this, but hasn't seen this post yet
How many Volvo forums have you been to asking the same n/a to turbo conversion question? How many N/A to turbo conversion have your come across? You might not want to believe it, but your setup is unique.
Seany27 wrote:
Fri Feb 16, 2018 3:11 am
if you look at the wiring for fenix 5.2 and motronic 4.3, they share pretty much all the same contacts. I have put in the T5 harness, and it sparks, I believe am not far off, maybe something as silly as a wire missing or situated in a different place. I also believe there is someone out there that knows this, but hasn't seen this post yet

Did you not read what he posted?
misha wrote:
Sun Feb 04, 2018 3:35 pm

10v cars don't even have air metering....MAF...they have MAP instead and IAT(intake air temperature sensor).
Maf= mass airflow sensor
Map=manifold absolute pressure

Ecu management is totally different and use totally different sensors,injectors,manifold,emissions system...and the list goes on...and YES ...they are OBDI only....they produce flash codes.
85 GLH, 367 whp
00 Insight, 72 mpg

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bmdubya1198
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bmdubya1198

Re: Volvo 850 t5 conversion

Post by bmdubya1198 » Fri Feb 16, 2018 8:21 am

If you're trying to run an engine on Motronic 4.3 without the aforementioned sensors, it's not going to work. If your original Fenix 5.2 did not have MAF, MAP, or IAT, the car won't start on that harness.
That being said, we didn't have 10 valve cars in the US, and I'm not familiar with them, so I'm not much help here.

Someone might have done something like this before, but I haven't seen it. This is like an NA to turbo build. It's only been done a couple times, and it's not very well documented... or recommended.
2000 V70R Venetian Red/Charcoal M56 Swapped 195k
2000 S70 GLT Mystic Silver/Taupe 253k
2003 S60 2.4T Silver/Black 112k
2007 XC90 V8 AWD Sport Titanium Grey/Black 166k
1993 944 Base Beige/Beige 221k
1991 944 Turbo Dark Green/Beige 173k
1992 245 Base White/Beige 249k
Sold-
1998 V70 GLT Black/Beige 199k
1998 S90- Silver/Gray 207k
1995 850 GLT Tropic Green... crushed
2001 S60 2.4T Black/Black 230k
1988 744 Turbo M46 Beige Metallic/Beige 188k

Seany27
Posts: 47
Joined: Thu Dec 14, 2017 12:55 am
Year and Model: 1995 volvo 850
Location: Desertmartin
Has thanked: 3 times
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Great Britain
Seany27

Re: Volvo 850 t5 conversion

Post by Seany27 » Sun Feb 18, 2018 6:52 am

Aye I did read that, that's why I have a maf sensor in now. I have installed a t5 wiring harness with all the plugs ready to be connected into the right sockets. Problem is when I say 10v, people think I have 2 ecu's. I saw a few posts of 20v converted to t5, or I wouldn't of taken this project on. If you can do it to a 20, you can do it to a 10

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bmdubya1198
Posts: 3758
Joined: Tue Dec 30, 2014 10:45 am
Year and Model: 2K V70R M56
Location: Charlotte, NC
Has thanked: 41 times
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bmdubya1198

Re: Volvo 850 t5 conversion

Post by bmdubya1198 » Sun Feb 18, 2018 8:03 am

Okay, you say you have a T5 harness, did you also switch it to Motronic?
Hook up everything where it needs to go and hook up the Motronic ECU. That’s where I would start.
2000 V70R Venetian Red/Charcoal M56 Swapped 195k
2000 S70 GLT Mystic Silver/Taupe 253k
2003 S60 2.4T Silver/Black 112k
2007 XC90 V8 AWD Sport Titanium Grey/Black 166k
1993 944 Base Beige/Beige 221k
1991 944 Turbo Dark Green/Beige 173k
1992 245 Base White/Beige 249k
Sold-
1998 V70 GLT Black/Beige 199k
1998 S90- Silver/Gray 207k
1995 850 GLT Tropic Green... crushed
2001 S60 2.4T Black/Black 230k
1988 744 Turbo M46 Beige Metallic/Beige 188k

Seany27
Posts: 47
Joined: Thu Dec 14, 2017 12:55 am
Year and Model: 1995 volvo 850
Location: Desertmartin
Has thanked: 3 times
Been thanked: 0
Great Britain
Seany27

Re: Volvo 850 t5 conversion

Post by Seany27 » Mon Feb 19, 2018 1:13 am

T5 harness, T5 ecu, motronic 4.3 , also everything that came with the engine, I am using the crank sensor from the 10v as the engine came out of an auto car, but there same part numbers, the cam sensors are a little different, tried both, same situation and no codes in the obd for them. I did get fan at low speed or faulty though

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