Hi.
I am building cosworth yb engine i buyed some parts and other are ready:

Holset hy35w turbo with ar 63 turbine housing. (would be equivalent to garrett gt3076)
Ported head 25mm inlet and 24 exh.
Long 133.5,mm rods, custom forged pistons 91.5mm with valve pockets.
Reinz GrA HG with std. Bolts..
std std crank, acl bearings
New HP oil pump...
205 block bored
...
Haltech ecu....

My question is what is the best combination about camshafts.

I already have purchased Bd14 inlet cam. My doub is if bd14 and std exhaust cam will work fine?

A tuner advised me to use bd14 inlet and bd14 exhaust.
Other run bd16 inlet and bd14 exh.

which will be the best combination? To my big turbo and high CR engine.

I will not want more than 430bhp due to the fragility of the block 205, but i would like good power and low torque engine.

My engine will run 8.5 to 8.7 static CR .

Thanks

 

Just use a standard exhaust cam. This will give the most torque.
Also time them for torque instead off top end power.

 

Thank you for answer Bart!
What could be good timming to my spec?

 

That 205 is going to die as maximum cylinder pressure is at max torque and not bhp. Also I see you have increased the CR, which will contribute to the death of the 205.

 

Thanks for your reply, but is very bad news for me.

I thought that using high octane gasoline could prevent detonation, but did not think that torque could get to crack the 205 up to 450bhp.

i want to receive some advice on setting the motor. I want my engine will be reliable, fast and pleasure to drive.

The compression ratio can not be modified because the block is already bored for new pistons. What advice can you give me on parts to use?

if you are sure that I'm in the wrong way, please instruct me to make changes I could buy a different turbo, camshafts ...

Thanks.