Cosworth Supercharger Owners Thread

[Matt@Cosworth]

I would have done the blue one possibly, anyone with ECUtek can obviously tune the car though and the intake on that blue one is a bit 'questionable' shall we say

[TurboBRZ_UAE]

Originally Posted by botbs

Hi Matt,

Nice to see you here and continue to provide support to us!

Just wondering did you help this person to retune his SC? It appears he swapped the 2400cc engine in his BRZ

Thanks!

Interesting - is that a FA24 swap or a bore/stroker on an FA20? I don't know Japanese but it looks like the latter.

If there was a way to mate this blower up to the FA24, I would've gone with a swap rather than a rebuild 6 months ago...

[Matt@Cosworth]

not me, but as there are loads of ECUteks tuners about

[TurboBRZ_UAE]

What's the expected boost of this kit with the 63.5mm pulley?

I got the vehicle second hand with the kit already installed and it feels a lot weaker than my last Avo turbo BRZ which was running 13-15psi. I have a scanguage plugged in which is measuring 5-6 (psi?) which doesn't sound right. I suspect the bypass valve is stuck partially open

Thanks

[weederr33]

Originally Posted by TurboBRZ_UAE

What's the expected boost of this kit with the 63.5mm pulley?

I got the vehicle second hand with the kit already installed and it feels a lot weaker than my last Avo turbo BRZ which was running 13-15psi. I have a scanguage plugged in which is measuring 5-6 (psi?) which doesn't sound right. I suspect the bypass valve is stuck partially open

Thanks

If I remember right, and it's been a very long time since I had my FRS and Cossie kit, but Matt had said it's around 8 psi. And the smaller pulley bringing it to 10 psi or there abouts. The cosworth kit was also built around longevity and not ultimate power, but I would also not compare a turbo kit to a supercharger.

[TurboBRZ_UAE]

Originally Posted by weederr33

If I remember right, and it's been a very long time since I had my FRS and Cossie kit, but Matt had said it's around 8 psi. And the smaller pulley bringing it to 10 psi or there abouts. The cosworth kit was also built around longevity and not ultimate power, but I would also not compare a turbo kit to a supercharger.

Thanks for the input. I was expecting in that ballpark so this is pushing a little low.

Any suggestions to diagnosis? The only thing to check in my mind is the bypass valve.

[weederr33]

Originally Posted by TurboBRZ_UAE

Thanks for the input. I was expecting in that ballpark so this is pushing a little low.

Any suggestions to diagnosis? The only thing to check in my mind is the bypass valve.

Check the hoses and such for a boost leak is also a good start.

[TurboBRZ_UAE]

Originally Posted by weederr33

If I remember right, and it's been a very long time since I had my FRS and Cossie kit, but Matt had said it's around 8 psi. And the smaller pulley bringing it to 10 psi or there abouts. The cosworth kit was also built around longevity and not ultimate power, but I would also not compare a turbo kit to a supercharger.

Originally Posted by weederr33

Check the hoses and such for a boost leak is also a good start.

Boost leak came out clean, which I expected given this is a sealed unit.
My tuner says it's logging 0.4-0.45 bar.

There's 2 avenues I see:
1) Bypass valve sticking open - which would not show up in a boost leak test, as it just bypasses from before to after the screws. How can I figure if this is closing properly?
2) The TVS screws themselves wearing down and losing a ton of efficiency. Does anyone know any shops in the EMEA region that I can send the supercharger to?

Thanks

[TurboBRZ_UAE]

Originally Posted by TurboBRZ_UAE

Boost leak came out clean, which I expected given this is a sealed unit.
My tuner says it's logging 0.4-0.45 bar.

There's 2 avenues I see:
1) Bypass valve sticking open - which would not show up in a boost leak test, as it just bypasses from before to after the screws. How can I figure if this is closing properly?
2) The TVS screws themselves wearing down and losing a ton of efficiency. Does anyone know any shops in the EMEA region that I can send the supercharger to?

Thanks

Update. Have zip tied the valve shut as best as I could (tight fit for my fat fingers underneath the manifold), and saw increased boost levels. It also makes wonderful whistling noises now.

Time to remove the blower and see what's really causing this. I may end up deleting the bypass valve with a blocking plate.