TD04 turbos

[1996 850 T5]

Ive been searching till the eary hours on various volvo forums about turbo choice and the various derivatives of the TD04 turbo..

Am I right in thinking that all TD04 turbo's are the same besides the different exhauts housing/turbines?

I.e the silver bits are all the same size/shape?

like illustrated in this (very interesting) link:

http://forums.turbobricks.com/showthread.php?t=10961

which shows some of the main derivatives...




now if thats right, and i hope it is, would an actuator like so:

http://cgi.ebay.co.uk/Turbo-Actuator...1%7C240%3A1318

fit one of our turbos? (a 15G to be precise)

basically the actuator i robbed off the old mans 13G will only resist up to about 5/6psi, and i cannot find, by hook or by crook an actuator for the T5...

Hopefully someone in the know can confirm my suspicions

Cheers

joe

[Enigma666]

You should be able to fit any actuator to the turbo mate.......might need a bracket is all

[Alan M]

The Compressor housing and rotating assembley (the silver bit) can be taken from one Volvo TD04HL model turbo and used in others in the range with the same turbine sized housings of 6cm2. Ie the 15g, 16t, 18t, and 19t CHRA will all fit the same turbine housing off either of those listed turbos. So you can use the existing car's downpipe and turbine housing with a larger compressor model turbo. I will soon be using a 19t compressor side with an angled 16t housing. The actuators can be had from ebay for the correct turbos. I am awaiting confirmation off a buyer of one I had for sale so if it falls through I'll let you have first dibs if you like. It is from the later angled turbo models and has the stronger spring of 300/70 spring setup.

[1996 850 T5]

To be frank, I cant be fussed making brackets at this stage in the game, it did cross my mind as I have an adjustable forge actuator lying spare, but id like to just bolt on a 'factory part' if possible.

Alan, that sounds like a plan, what sort of pressure will this stronger spring type crack open at? the usual 10psi? Will it be a direct fit?


Can I also ask (i havent searched for this yet, but will go off and do so now) has anyone back calculated the VE of our 2.3 T5 engines?

Im going to have a route on the net for compressor maps for the usual suspects, and see whats what, im still a bit of an amatuer at reading those things, but getting there slowly!

Cheers all

Joe

[Dangerous Dave]

Yeah, I think I read somewhere that the LPT uses a lower pressure for the actuator and has a different BCV.

Checkout swede demons turbo list, there's also some piccys if you click the links in the table further down the page

http://www.swededemon.com/turbo/turbolist.html

[mk3phill]

Can I also ask (i havent searched for this yet, but will go off and do so now) has anyone back calculated the VE of our 2.3 T5 engines?

would also be interested to know the VE of the engine,.,.being motorsport student though i am thinking of building up a T5 engine for a final prject but tryin to get its VE as high as possible while keeping in with emissions and such.

[Alan M]

I think the stronger spring actuators are set to an opening pressure (depending on car engine model) of about 4-6psi. Its the ECU and BCV that control the pressures the car wants to see. The standard opening pressure of the 15g is 1.8psi IIRC but I'm sure someone will have the list off Vadis and post it for you at some time.

[p fandango]

I think the stronger spring actuators are set to an opening pressure (depending on car engine model) of about 4-6psi. Its the ECU and BCV that control the pressures the car wants to see. The standard opening pressure of the 15g is 1.8psi IIRC but I'm sure someone will have the list off Vadis and post it for you at some time.

the actuator on my 19T is set at 0.68bar (10psi) & sure my old 15g was 0.3bar (4.5psi)

[Dangerous Dave]

Found a list

Engine - Pressure
B5204T - 1.8psi
B5204T2 - 1.8psi
B5204T3 - 2.1psi
B5204T3, from model year 1999 - 2.6psi
B5204T4 - 1.8psi
B5204T5 - 1.8psi
B5234T - 1.8psi
B5234T2 - 4.3psi
B5234T3 - 4.3psi
B5234T4 - 1.8psi
B5234T4 R-line, from model year 1998 - 4.0psi
B5234T5 - 1.8psi
B5234T6 - 4.3psi
B5234T7 - 1.8psi
B5234T8 - 4.3psi
B5244T2 - 4.3psi
B5244T3 - 1.8psi
B5254T - 1.8psi

[Alan M]

Thats the one B.

[1996 850 T5]

So does the BCS just let the actuator see 'x' psi when it wants to put a cap on boost production?

I guess this is to limit wastegate creep? by making it more of an on/off action?

[Alan M]

The BCS works as a kind of electronic bleed valve with the exhaust running back into the induction pipe from the air filter housing to turbo.