So I noticed my "new" T5M has a boost spike @15psi rarly, somewhere around 3000 rpm. Then it drops drastically @ 40000 and eventually reaches 15 psi (guesstimate on the interior gauge, almost at the very end of the scale) above 5000 again.
My 96 R doesn't do that. My guess is the TCV or the lines ftom the TCV to the turbo.
Now, what do YOU think?
boost spikes on stock 94 T5M
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scot850
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Something weird there as the I don't believe the standard engines should boost that high. The standard Volvo TCV is only rated to 12psi so above that it becomes random. I would be concerned someone has cranked the turbo boost.
TCV's do become weak with age, and especially struggle at 40000RPM! Seriously they can become random in operation as the age, as can the pipes to it due to splitting. Check them carefully.
Neil.
TCV's do become weak with age, and especially struggle at 40000RPM! Seriously they can become random in operation as the age, as can the pipes to it due to splitting. Check them carefully.
Neil.
2006 V70 2.5T AWD Polestar tune
2000 V70 R - still being an endless PITA
2006 XC70 - Our son now has this and still parked in our garage
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L - Sold
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - Sold
2000 V70 R - still being an endless PITA
2006 XC70 - Our son now has this and still parked in our garage
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L - Sold
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - Sold
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Clemens
- Posts: 1934
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- Year and Model: 96 855 R + 94 855 T5
- Location: Austria
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It feels like someone put a larger turbo or different ecu in it, but it was family owned by a guy who obviously never heard of preventive maintenance and then by his daughter in law.
The raw power on that thing is crazy, especially early on, but so not consistent. Will give vacum lines and turbo hoses a look.
Btw, with the stock exhaust the T5M sounds way meaner and grumblier under load than my 96R. Wondering if that is due to the factory reverse intercooler piping.
The raw power on that thing is crazy, especially early on, but so not consistent. Will give vacum lines and turbo hoses a look.
Btw, with the stock exhaust the T5M sounds way meaner and grumblier under load than my 96R. Wondering if that is due to the factory reverse intercooler piping.
Summer: 1996 855 R
Winter: 1994 855 T5M
Donor: 1995 854 10V
Winter: 1994 855 T5M
Donor: 1995 854 10V
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