850 TURBO tuning options.

[jasoncurrie]

Merry xmas everyone,

Might be the new owner of a 850 turbo saloon soon, and I was just wondering what the tuning options were, I have had a search it seems these engines are strong anoth to run to 300BHP standard . Which seems abit unusual because it runs at 225 BHP normally from what I have found out..

why is the engine designed to run far below what it is capable of ? I have also heard about Chipping these cars but I thort with turbos you just raise the boost ?. How much are these chips ? Or can I just get a stainless steel exhaust, good air filter and raise boost ? What sort of BHP could I expect doing just this and can anyone tell me the safe level for the boost is.

Another thing how the hell can this sort or power be managed with front wheel drive I have a 220 turbo at about 190 bhp which is interesting to handle at that power to say the least. Near 250 BHP must be very difficult indeed.

I was also hoping to carry out a compression test on the engine does anyone know what sort of PSI I should be looking at ? and if I am right in thinking there should be less then 10% difference in the cylinders?

Jason.

[Vikingxl]

Best bet is to give Hamish a ring at volvo tuning in bromsgrove
http://www.volvotuninguk.com

[splatt]

hello mate...welcome to the forum..

Yeah...give Hamish a call

The engine as it is will be good for up to about 350 BHP so I understand....beyond that is rebuild time...

All engines are out of the factory to cope with crap fuel...lack of service, poor maintainance....a tuned engine rquires a lot of care....

A simple remap will give you massive power increase and driveability......


Have fun.....

[jasoncurrie]

350 BHP,

There is know way i could handle that,, 250 bhp would be a challenge !!!

I am hopefully looking at this car tommorow and i,m going to bring my trusty compression tester can anyone tell me what sort of psi figures i should expect.

any tips on what to look out for ?

[Mrsmopp]

Welcome to the forum.

225bhp though the front wheels makes for entertaining driving in the wet but the T5 actually handles it really well - you'll have to adapt your driving style a little so you dont end up wheel spinning (its all about timing ) everywhere you go. An 850 T5 will handle about 350bhp on standard set up (you will need a bigger turbo mind you) before rods start bending but its not just a case of upping the boost. The cheapest way to get a little more omph is an MBC (manual boost controller) and you can expect to see about 250-260bhp safely with one of these, fit one with care tho as bost spikes can result in bent rods. The best option is a remap (or chip) which will reprogramme the ECU to upgrade the fueling and timing etc along with the boost and allows you to run 300bhp + safely.

x

[Al115]

Hello and welcome...

There are a bunch of options available to you to get more power from the engine - anything from fitting an MBC through to an ECU remap ("chip), bigger turbos, and so on.

MBCs are apparently easy to fit, although require some care as Moppy said. Might not be a bad place to start?

If you do decide to go with the ECU remap / chip, there a number of companies around vying for your money, the most popular being BSR, RICA, and MTE.

Good luck and let us know what you decide to do!

[Al115]

Oh, and in answer to your other question... I compression-tested my V70 T5 last year and it averaged 165psi per cylinder. Hopefully that is a useful indication.

Big differences between cylinders mean trouble, I don't know what tolerance is allowable.

[jross]

Volvo deliberately developed an engine that could take abuse, which is why you see a good number of T5s with 150k+ miles which are in good shape with just routine maintenance.

That being said, the "safe" amount of power you can push through these is kind of up in the air. I think alot of folks on the forum here are having good success, but my personal experience hasn't been all that great - I blew my motor (see sig) with just ~220whp. Oh well, accidents happen. Just be prudent And the best advice I've ever heard is "don't race if you can't afford to walk away from a disaster"

[jasoncurrie]

Hi everyone,

swapped my 220 rover turbo for a T5,

The engine is smooth. a very nice crusier indeed reminds me of an old bmw 735 i once had.

I do think it needs a kick up the back side though, My 220 was on 12 psi with a stainless steel etc [with cat] seemed to have much more grunt. You could get 70 MPH in 2nd much more on the edge as it were.

The T5 i know is heavier but seemed to be lacking push almost as if the engine was,nt trying don,t get me wrong it,s moterway muncher lovley and smooth.

And having started with a rover 420 turbo 4 weeks ago which i bought for £760 i am very happy indeed to have a beast of a t5 sitting outside my house now.

But this old man needs it grunt back does anyone know how much these chips go for. I considered getting mbc for the time being and was also wondering what sort of PSI would be safe.

[Mrsmopp]

The RICA remap is £280+ VAT (I think) but we get a discount on that for forum members I cant remember what prices the others are but I think they are all similar in price.

x

[jasoncurrie]

Hi Jross the cunfuses me ? that at 220 hp your engine blew ? if there good for 300 bhp + .

Does it come down to condition of engine,lubrication, and coolent working correctly ??

[jasoncurrie]

but we get a discount on that for forum members

sounds good, what sort of BHP etc would i be looking at ?

and can anyone recommend good disks and pads for this car, they really will need doing.

[Mrsmopp]

sounds good, what sort of BHP etc would i be looking at ?

and can anyone recommend good disks and pads for this car, they really will need doing.

You'll get 280bhp and a mountain of torque!!

Pads and disks - the DS2500 come highly recommended from the forum members that use them

x

[Mrsmopp]

Hi Jross the cunfuses me ? that at 220 hp your engine blew ? if there good for 300 bhp + .

Does it come down to condition of engine,lubrication, and coolent working correctly ??

I think he must have been very unlucky as I have been running my last 2 T5's at around the 300bhp mark and they are both still going strong - I haven't heard of anyone else who's engine has given up until they get to silly BHP

x

[Mrsmopp]

http://www.volvot5.co.uk/forums/show...?t=5751&page=1

[jasoncurrie]

Thanks for the info is 280 bhp at wheels ?

and what safe boost level could i run untill i save the pennys, cheers

[Mrsmopp]

Nah, 280 @ the crank. You can get the 300bhp map for the 850 but they dont often reach the desired figures as they are 10 years + and its rare to find one thats in true fine fettle. The 280 map nis more of a "safe" map.

I think about 13 psi is a safe setting for your MBC - I'm sure someone will correct me if I am wrong (its been I long time since I had mine fitted)

x

[jasoncurrie]

Now i am cunfused are most BHP given for the crank or wheels ?

Is the rover 220 turbo 197 bhp and say 24 valve senny 205 bhp at the crank as well ?

Sorry if these are dum questions think i need to read up more LOL

[Mrsmopp]

Most Manufacurers and Tuners will quote BHP figures at the crank.

x

[jasoncurrie]

Just took my car out on my privet track,

and i was wondering if these figures seem right,

2nd = 60 mph
3rd = 90 mph
4th = 120 mph [red line]
5th = 140 mph

checked the boost and it is holding at 1/3 into the white ?

It is fantastically smooth what a cruiser but can’t help but think it is a little flat
Is 140 MPH normal ? must admit my old rover 620 Ti did 145 MPH standard so expected a little higher ? or faster to the same speed.

About the boost control,, on the rover 220 turbo I believe it can’t go above 12 psi on standard internals. Is 13 psi figure Max on T5 because the ecu will not allow anymore. Just wasn’t sure why it couldn’t run higher if the chip can over run 300 BHP on standard engine etc.