IPD sale XeMODeX - Experts in Volvo Electronics
Did you know? 🤔
Logged in users can get email notification of topic replies Log in or register (free).
Amazon Link Buy anything with this and it helps MVS!

200 V70 Boost and v.e. 2-3 Shift issue?

How to go faster, stop quicker, and turn harder. Chips, exhaust, larger turbos, bigger/slotted/drilled rotors, high performance brake pads, manual boost controllers, performance shocks/struts/springs, airbox mods and more! Also discussion on HID and Xenon lights, aftermarket foglights and other exterior lighting.
Yarddogperformance
Posts: 48
Joined: Sun Mar 04, 2018 10:30 pm
Year and Model: 2000 v70 cc se
Location: Colorado
Has thanked: 2 times
Been thanked: 1 time
United States of America
Yarddogperformance

200 V70 Boost and v.e. 2-3 Shift issue?

Post by Yarddogperformance » Wed Sep 26, 2018 7:38 am

:roll: ok this might be a bs thread.
When i got my v70 xc it ran about 5psi
Put a manual boost control (by pass style)
To no avail
I worked on the bov, found that the spring was week, so i made it adjustable.
Still 5 psi
So i did the old jamacan wastegate preload.
10 psi. Ok now what right?
Tire fryer
So becouse i like the car i cut it back
9 psi, great power (i thought) until i lost to a 200k civic
And on the 2-3 it struggled to upshift, (either lack of fuel or trans issue.

So i backed it down to 8 psi
2-3 doesnt struggle, and power is better than before, but why the issues on the 2-3 shift?

I believe it need more fuel, so what im thinking is a gtx 3076 r, at about 8 psi, but am i going to run into the laggy shift again? Thistime becouse of valume and not pressure?

Please no bs keyboard mechanic crap. If your rolling a stock volvo and cant change your oil please dont say anything leave it for someone who knows please

User avatar
abscate
MVS Moderator
Posts: 21532
Joined: Sun Feb 17, 2013 5:54 pm
Year and Model: 99T5 ,99S70,2005V70
Location: NYC, ALBANY NY
Has thanked: 336 times
Been thanked: 1035 times
Trinidad & Tobago
abscate

Re: Boost and v.e.

Post by abscate » Wed Sep 26, 2018 8:25 am

Ill bump you into the Performance Forum where you'll get more peeps who run manual boost there.

Here in the P80, we debate choice of latte or wine while other people change our oil...

:lol:
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW
Link to Maintenance record thread
Link To Volvo Glossary

Yarddogperformance
Posts: 48
Joined: Sun Mar 04, 2018 10:30 pm
Year and Model: 2000 v70 cc se
Location: Colorado
Has thanked: 2 times
Been thanked: 1 time
United States of America
Yarddogperformance

Re: 200 V70 Boost and v.e. 2-3 Shift issue?

Post by Yarddogperformance » Wed Sep 26, 2018 8:33 am

Not me, i prefer to do all my own work, every mechanic makes mistakes, if you dont know their flaws it could be a death sentance where i live.
Best way to know your car, is to service your car, drive your car, and enjoy your car

User avatar
June
Posts: 1800
Joined: Wed May 04, 2016 11:18 am
Year and Model: 2004 S80 T6
Location: Jacksonville, Florida
Has thanked: 322 times
Been thanked: 162 times
United States of America
June

Re: 200 V70 Boost and v.e. 2-3 Shift issue?

Post by June » Wed Sep 26, 2018 8:53 am

Something you dont mention is if you altered the computer tune? It seems to me on a computer controlled engine if you want to nearly double the boost psi mechanically, the computer tune should be set for the new boost parameter? I can't imagine changing the turbo to a Garret unit to achieve the same boost psi would change anything as you are already achieving the boost psi desired with bad result.

I believe there is a tune specialist on here that can customize your tune to accommodate the physical changes you may desire to make. June
My Volvo cars owned
1989 740 GLT ordered
1994 850 4door standard shift ordered
1996 960 ordered
1998 S90 ordered totalled after 3 weeks
1998 V70 GT dealer stock car
2002 S80 T6 ordered totalled
2004 S80 T6 dealer stock car and current car owned

Yarddogperformance
Posts: 48
Joined: Sun Mar 04, 2018 10:30 pm
Year and Model: 2000 v70 cc se
Location: Colorado
Has thanked: 2 times
Been thanked: 1 time
United States of America
Yarddogperformance

Re: 200 V70 Boost and v.e. 2-3 Shift issue?

Post by Yarddogperformance » Wed Sep 26, 2018 9:01 am

Ah very good note, no i havent been able to afford a tune. However everyone forgets that engines always make power, the engine is only under boost during acceleration.
Therefore since its 8 psi at 2500 rpm wot, and only 6psi maybe 5, at 4500rpm wot.
The issue isnt boost pressure it is valume and flow, my question was if i increase the flow, in and out is the factory tune going to have the same problem as it did on 10psi witch had 0 boost drop at high rpm, but a laggy 2-3 shift and loss of power

Like i said im looking for a mechanic not a keyboard warrior

User avatar
abscate
MVS Moderator
Posts: 21532
Joined: Sun Feb 17, 2013 5:54 pm
Year and Model: 99T5 ,99S70,2005V70
Location: NYC, ALBANY NY
Has thanked: 336 times
Been thanked: 1035 times
Trinidad & Tobago
abscate

Re: 200 V70 Boost and v.e. 2-3 Shift issue?

Post by abscate » Wed Sep 26, 2018 10:58 am

The 1999-2001 P80 models are running Bosch ME7 management software which is less forgiving than the earlier versions.

Running stock wastage more than 2 turns off factory has been reported to bend rods - careful with that boost!
These users thanked the author abscate for the post:
Yarddogperformance
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW
Link to Maintenance record thread
Link To Volvo Glossary

scot850
Posts: 6073
Joined: Mon Apr 05, 2010 2:46 pm
Year and Model: 2000 V70 R
Location: Calgary, Alberta, Canada
Has thanked: 14 times
Been thanked: 230 times
Canada
scot850

Re: 200 V70 Boost and v.e. 2-3 Shift issue?

Post by scot850 » Wed Sep 26, 2018 11:16 am

When was your transmission oil last serviced? 2-3 flare/shift delay is often a sign it is way passed due. When the fluid is done, the gear changes in these 2 are often slow and sudden.

Neil.
2000 V70 R - still being an endless PITA
2006 XC70
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - New project and test bed - Sold

User avatar
June
Posts: 1800
Joined: Wed May 04, 2016 11:18 am
Year and Model: 2004 S80 T6
Location: Jacksonville, Florida
Has thanked: 322 times
Been thanked: 162 times
United States of America
June

Re: 200 V70 Boost and v.e. 2-3 Shift issue?

Post by June » Wed Sep 26, 2018 12:05 pm

Yarddogperformance wrote: ↑
Wed Sep 26, 2018 9:01 am
Ah very good note, no i havent been able to afford a tune. However everyone forgets that engines always make power, the engine is only under boost during acceleration.
Therefore since its 8 psi at 2500 rpm wot, and only 6psi maybe 5, at 4500rpm wot.
The issue isnt boost pressure it is valume and flow, my question was if i increase the flow, in and out is the factory tune going to have the same problem as it did on 10psi witch had 0 boost drop at high rpm, but a laggy 2-3 shift and loss of power

Like i said im looking for a mechanic not a keyboard warrior
I asked my husband who was a dealer mechanic until he found welding pays better. Mike said OBD 2 can only handle a maximum of 30% increase of air 20% safely. He said at 30% air increase your stock injectors are wide open and not where you want to be. Also by increasing boost psi you are increasing the compression ratio. He said likely your shift problem is likely a result of the knock sensor hearing knock from either a lean condition or knock from compression causing the computer to attempt to stop the knock. End result will be power loss. He said you can expect to either blow the engine or transmission or both in their stock 20yo condition.

He said if you want to increase flow past 20% larger injectors, remapping the computer, and possibly a higher flow mass airflow sensor depending on how crazy you want to go. Also he said the added airflow needs to be able to exit the engine. rebuilding the engine and transmission with performance in mind would be required and beefed up axles to handle the torque would also be needed. He says your best bet for more power out of a old car is a tune without all the extra boost.

Volvo actually makes crazy fast cars. You just did not buy one. A few years ago when the S60 Pollstar was hitting 0 to 60 in under 3 seconds I really thought about ordering one as a occasional use car, but it would have cost me my marriage. In hindsight I wish I had bought one... :lol: :mrgreen: :lol: :mrgreen: June
My Volvo cars owned
1989 740 GLT ordered
1994 850 4door standard shift ordered
1996 960 ordered
1998 S90 ordered totalled after 3 weeks
1998 V70 GT dealer stock car
2002 S80 T6 ordered totalled
2004 S80 T6 dealer stock car and current car owned

Yarddogperformance
Posts: 48
Joined: Sun Mar 04, 2018 10:30 pm
Year and Model: 2000 v70 cc se
Location: Colorado
Has thanked: 2 times
Been thanked: 1 time
United States of America
Yarddogperformance

Re: 200 V70 Boost and v.e. 2-3 Shift issue?

Post by Yarddogperformance » Thu Sep 27, 2018 3:04 am

B523t3,15k miles, new trans, new turbo supposedly.
Trans and engine have been replaced, and the local dealer did a terrible job. However after correcting those issues the car seems fine.
Now i think ive gotten my answer,

A larger turbo will make more power with less pressure. The only difference i should see is at higher rpm, where the boost wont drop.

As far as the power loss thing ill bet it was poor fuel considering there are guys running 13psi dependably, the oil cap dont hold the crankase pressure but the rods hold up ok, its the sleeves they tend to crack.

That said it doesnt matter if its 100 cfm or 10,000 8 psi is 8 psi

Yarddogperformance
Posts: 48
Joined: Sun Mar 04, 2018 10:30 pm
Year and Model: 2000 v70 cc se
Location: Colorado
Has thanked: 2 times
Been thanked: 1 time
United States of America
Yarddogperformance

Re: 200 V70 Boost and v.e. 2-3 Shift issue?

Post by Yarddogperformance » Thu Sep 27, 2018 3:06 am

And volvos arent just fast, yes they have a high top speed, but a honda accelerates just as quickly. Without boost, under 2 litres

Post Reply
  • Similar Topics
    Replies
    Views
    Last post