94mxsix said:
I plan on getting a klze but I have heard alot of people say that with the stock computer there is no difference and some people say it needs to be reprogramed for the vris shift points can somebody please settle this matter I want to get the 200hp crank from this motor.
The big power adders in the KLZE conversion are mechanical: better intake, better cams, more compression and bigger head ports result in more airflow giving more power. The KL03 PCM will work for the KLZE but it won't be optimal, but you won't lose gobs of power to it.
The VRIS points are a good example. The correct VRIS points for the KLZE are different than they are for the KL03; 4062/4781/6812 versus 3250/4250/6250 for the KL03. The KL03 PCM will switch at the KL03 points, producing "holes" in the powerband, which can be readily seen
here. As well, the KLZE PCM runs a slightly different VRIS strategy than the '03. The important thing is that the KLZE's power peak occurs somewhere around 6000RPM, a time at which the KL03 PCM still has both VRIS valves open which is good. Correcting the VRIS points will remove a certain amount of lumpiness from the KLZE torque curve but won't add more to the overall power output.
The KLZE PCM omits a ton of the EGR-related logic and it runs a more aggressive timing curve etc. You might gain a few HP back by updating the timing table to KLZE specs, but it won't be a huge gain.
Some KLZE PROMs are not compatible with KL03 hardware, the VAF to be specific. Before springing for a KLZE PCM, make sure it'll work with your VAF.