What to do, to build an S65?

[Morally Gray]

@ Roman.. If only that was the only reason people rebuilt

Yeah pretty set on a stronger stock motor locally built. If I can reuse my pistons I likely will, better rods, clearances, bearings, bolts and other bits.

[Verify]

Originally Posted by MFKN3

I agree with Roman. I run 8-9 psi and was told the fuel system probably wouldn't keep up if I went any higher. That and my CR is already 12.0:1

It's how I wanted it though, lots of torque and nice and bouncy around tracks yet still okay on the street. I honestly couldn't use more power, it would be too hard to control. Other builds I have seen is to stroke/bore and lower compression but run 15+psi boost. My pistons were replaced with newer forged ones to be stronger and also because I had a full build to keep compression high. The stock pistons are forged, but I'm unsure how they compare.

I don't think there are many stories of detonation because I heard the ECU does a good job at managing and intercepting but could be wrong.

What failed on your motor?

[MFKN3]

Originally Posted by Serpico

What failed on your motor?

Bearings failed, stretched some rods and damaged the crank. Another local spun his bearings and also damaged the block

[OM VT3]

Originally Posted by Roman@ESS

The only reason to do a full motor build is if you intend to lower your CR for high boost FI application. Lowering your CR allows for higher boost levels to be run safely or adds more safety to existing boost levels. Running anything more than 8-9 psi on the S65 really requires lower CR if your interested in reliability. This can be done with a custom drop in piston or sleeving the cylinders and adding new custom pistons. If you do lower the CR and raise the boost past 9 psi you will need a custom fuel system like the one DLSJ5 runs on his VT3 setup. It is not enough to simply build the motor and crank up the boost.

We do not have the time to build and support custom motor builds. These builds require dedicated time, staff and work space. We have dealers that are more than willing to take on these builds and have built them for customers in the past. If someone has a built motor, a proper fuel system and is running our supercharger it is easy for us to supply the hardware for high boost and software needed but we do not do tech support on these.

What build have you guys done on your car and what kind of sleeves and fuel system has been used?