Retro fitting turbos

Jan 31st, 2007, 08:54

HI,

This is my first post on the site, and this wuestion has probably been answered a hundred times, but I cant find it....

Can you retro fit a low pressure turbo to a 2.5 10v v70 (1998)

Also, if I fit a stainless steel exhaust with a 'straight through' silencer, will I have to get the ECU remapped?

Sorry for being a Dunce.... I can just about chance a brake disc!

PNuT · Jan 31st, 2007, 18:23

compression ratios on naturally aspirated engines are higher than turbo engines....

a t5 HPT is around 8.5-1

a 2435 lpt is around 9.0-1

yours is around 10-1

i figure it could be done, but you would have to run really low boost at a guess.... & it would require alot of work... flog your motor & buy a T5

pyaap · Jan 31st, 2007, 18:28

I totally agree with PNut on this one; it would be more financially viable to buy yourself a T5 or something similar, rather than retrofit a turbocharger. In my experience, if you really want to go the whole hog on an NA car, then the best gains per £ spent are to be had from nitrous!!!

PNuT · Jan 31st, 2007, 18:36

i would however be interested in knowing what fitting a 15/16g turbo will do to a 2435lpt?

foggyjames · Feb 1st, 2007, 02:06

"+T" conversions are popular on 740s, especially in the US, as finding clean turbo cars is tricky, and as long as you keep the boost pressure down, the compression doesn't hurt.

On a V70...I agree....sell and buy a turbo if you want one.

You should be alright with the stock map with a performance exhaust. Older cars with 'air flow' rather than 'air mass' controlled fuel systems stuggle to compensate for modifications properly, but the more modern systems (early 90s onwards) are more forgiving.

I worry about the true safety (in terms of longevity) of running an off-the-shelf 'remap' designed for a standard spec car (but with elevated boost, etc) on a car with a bigger turbo, etc...but people do it, and I'm not aware that anyone has broken anything doing this. The suppliers claim it's 'safe', but you won't achieve the full potential your car has to offer in terms of power. I'm specifically speaking about the 'chips' for 2/7/940s with LH-Jetronic 2.4 now.

cheers

James

adamsky01 · Feb 1st, 2007, 02:51

unles u can find a v70 T5 that has been ramed up its rear end and buy the car whole and slave over it for a month or 2 u might beabile to turn urs in to a T5 engine out the new one wiring loom ecu ect ect buy the u will be lucky if u save the price of a pint of beer on buying a T5 out right unless there is a atachement to said car then in that case all i say is good luck

Jan 31st, 2007, 08:54	#1
marcv Guest Location:	Retro fitting turbos HI, This is my first post on the site, and this wuestion has probably been answered a hundred times, but I cant find it.... Can you retro fit a low pressure turbo to a 2.5 10v v70 (1998) Also, if I fit a stainless steel exhaust with a 'straight through' silencer, will I have to get the ECU remapped? Sorry for being a Dunce.... I can just about chance a brake disc!

Jan 31st, 2007, 18:28	#3
pyaap Non-T4 T4s RULE!!!! Last Online: Mar 29th, 2017 11:24 Join Date: Nov 2002 Location: Bristol / Bath	I totally agree with PNut on this one; it would be more financially viable to buy yourself a T5 or something similar, rather than retrofit a turbocharger. In my experience, if you really want to go the whole hog on an NA car, then the best gains per £ spent are to be had from nitrous!!! __________________ "An Engine Which Runs Lean Lives on Borrowed Time" http://www.volvoforums.org.uk/showthread.php?t=13998

Jan 31st, 2007, 18:23	#2
PNuT MaDMaN Last Online: Nov 26th, 2022 18:47 Join Date: Sep 2006 Location: Red Lodge	compression ratios on naturally aspirated engines are higher than turbo engines.... a t5 HPT is around 8.5-1 a 2435 lpt is around 9.0-1 yours is around 10-1 i figure it could be done, but you would have to run really low boost at a guess.... & it would require alot of work... flog your motor & buy a T5

Jan 31st, 2007, 18:36	#4
PNuT MaDMaN Last Online: Nov 26th, 2022 18:47 Join Date: Sep 2006 Location: Red Lodge	i would however be interested in knowing what fitting a 15/16g turbo will do to a 2435lpt?

Feb 1st, 2007, 02:06	#5
foggyjames 300 Register Keeper Last Online: Jun 7th, 2024 15:35 Join Date: Dec 2001 Location: Nottingham	"+T" conversions are popular on 740s, especially in the US, as finding clean turbo cars is tricky, and as long as you keep the boost pressure down, the compression doesn't hurt. On a V70...I agree....sell and buy a turbo if you want one. You should be alright with the stock map with a performance exhaust. Older cars with 'air flow' rather than 'air mass' controlled fuel systems stuggle to compensate for modifications properly, but the more modern systems (early 90s onwards) are more forgiving. I worry about the true safety (in terms of longevity) of running an off-the-shelf 'remap' designed for a standard spec car (but with elevated boost, etc) on a car with a bigger turbo, etc...but people do it, and I'm not aware that anyone has broken anything doing this. The suppliers claim it's 'safe', but you won't achieve the full potential your car has to offer in terms of power. I'm specifically speaking about the 'chips' for 2/7/940s with LH-Jetronic 2.4 now. cheers James

Feb 1st, 2007, 02:51	#6
adamsky01 back for now Last Online: Aug 17th, 2016 21:48 Join Date: Aug 2006 Location: gone	unles u can find a v70 T5 that has been ramed up its rear end and buy the car whole and slave over it for a month or 2 u might beabile to turn urs in to a T5 engine out the new one wiring loom ecu ect ect buy the u will be lucky if u save the price of a pint of beer on buying a T5 out right unless there is a atachement to said car then in that case all i say is good luck

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