volvo v40 2.0t not reaching power

[peejay2104]

Originally Posted by 960kg

What is your engine code on the timing cover label?

You will need an adapter for the 15T turbo as it uses a different manifold studs etc.

Engine code is b4204t3.
Does a 14t turbo fit without adjustments? Dont really feel like messing around with adapters and stuff. Unless with the adapter it is a straight bolt on

Grts
Pj

[peejay2104]

Or would it be possible to do a conversion?
To change the 12t to a 15t?
Or if anyone knows where i can buy an adapter for the manifold of the 15t?
pj

[Clan]

Originally Posted by peejay2104

Il'll do that this weekend, haven't done that yet thanks. What should the reading be?
The car does run on gas aswell and does the samen thing on gas. Lack of power in the higher rpm range :/

Pj

fuel pressure should be around 3.5 bar stable and not dropping off when you get to 5000 - 6000 rpm at full throttle
If it does the same on LPG it could be something more fundamental . Cam timing ok ? Have you had the cam pulleys off ?
Did you fit a restrictive intercooler at the same time?

[trufauru]

If I were you, I would try and find the cluprit for the missing power before trying to change the turbo to a bigger one and find the bad way that something was on the way out.

I found strange that you have the right torque numbers but missing horsepower.

[peejay2104]

Originally Posted by Clan

fuel pressure should be around 3.5 bar stable and not dropping off when you get to 5000 - 6000 rpm at full throttle
If it does the same on LPG it could be something more fundamental . Cam timing ok ? Have you had the cam pulleys off ?
Did you fit a restrictive intercooler at the same time?

Have not checked the cam timing, i'm not assuming this is off as i've never touched that. i've not fit any other intercooler
I just put the car on the dyno again, but without the air filter and the drop of in power is even worse without the airfilter which makes me think it could be just the MAF sensor.
Ordered one today, will see what it does in a couple of days

pj

[peejay2104]

Originally Posted by trufauru

If I were you, I would try and find the cluprit for the missing power before trying to change the turbo to a bigger one and find the bad way that something was on the way out.

I found strange that you have the right torque numbers but missing horsepower.

Yes, this is ofcourse what i would prefer. But assuming that it might be the turbo i'll change this after the MAF sensor if that did not help.
I can not think of anything else that might cause this problem other than the MAF sensor or turbo :/
The ecu also tells me that the car is running rich above 5000rpmish.

Not sure what to think else, maybe a boost leak? Are there any common places where it could leak?

pj

[960kg]

Originally Posted by peejay2104

Hi everyone,

i'm currently having a bit of an issue with my 2003 volvo v40 2.0t.
A couple of days ago i've had it remapped, so it should have around 210hp.
Now for some reason it's not getting this, and i only get to about 170-180hp.
I've changed plugs, coils, decatted the exhaust and put on a new wastegate actuator. Turbo is running at around 14psi.


If anyone else has some ideas, please let me know as i really don't know if it could be something else.

Many thanks!
pj

Originally Posted by peejay2104

Engine code is b4204t3.
Does a 14t turbo fit without adjustments? Dont really feel like messing around with adapters and stuff. Unless with the adapter it is a straight bolt on

Grts
Pj

Your problem is i believe is because you have the later B4204T3 which should give you 165bhp as std. with around 8.7psi of boost.

The max. safest boost with this inferior engine to the T4 is 12psi and i should think your ECU as it it the later model is reducing the boost so although you have had a remap the ECU says you can`t have more boost to keep the engine safer from letting go.

The boost cut does happen around 13 to 14psi so you are lucky to get to 14 unless your guage is not accurate?

It is far more complicated than just bolting a bigger turbo on as the rest of the engine cannot take the power. The safest power on here i heard of was 197bhp with this engine.

You are tuning it to rag it so it is best to go the T4 way or maybe the 2litre T5 which is also not so good engine ....Head gasket failure, split liners etc.

These later models all have two boost sensors to limit boost!

Your question about 14T ...yes it does bolt straight on the studs are the same as the 12T.

[peejay2104]

Originally Posted by 960kg

Your problem is i believe is because you have the later B4204T3 which should give you 165bhp as std. with around 8.7psi of boost.

The max. safest boost with this inferior engine to the T4 is 12psi and i should think your ECU as it it the later model is reducing the boost so although you have had a remap the ECU says you can`t have more boost to keep the engine safer from letting go.

The boost cut does happen around 13 to 14psi so you are lucky to get to 14 unless your guage is not accurate?

It is far more complicated than just bolting a bigger turbo on as the rest of the engine cannot take the power. The safest power on here i heard of was 197bhp with this engine.

You are tuning it to rag it so it is best to go the T4 way or maybe the 2litre T5 which is also not so good engine ....Head gasket failure, split liners etc.

These later models all have two boost sensors to limit boost!

Your question about 14T ...yes it does bolt straight on the studs are the same as the 12T.

Hi, did not know all of this. Is it really possible for the ecu to reduce the boost? It's been set manually to always boost to around 14psi. I do not have a gauge, the garage measured this straight at the turbo. Even if it does not boost to the full 14psi, i should have more hp then 170 right?

According to the garage (which does solely volvo and saab engines) the engine should take 250hp, but that's pushing it. So i'm more aiming to get 220-230. Use the t4 turbo, if mine is really broken and set that to a max of 10-11psi.

Is installing a boost gauge a difficult thing to do?

Grts
Pj

[peejay2104]

Alright, so i went ahead and got myself a boost gauge insteaf of using the OBD to read the boost on the turbo. According to the ecu, there is 13psi of boost. But the gauge only shows around 8psi. Looked for leaks, but everything seems fine.
Someone who knows a bit more with this info?

Pj