simmode1 wrote:That's a generalization. The VQ30DET, the VQ35HR, the VQ37VHR, the VR38DETT all handle boost just fine. On the other hand, the VQ35DE's don't (as much). Just depends on the setup from the factory. By your logic, an KA would be better for boost than an SR, which isn't the case. They can be equally good depending on the setup. I prefer not to rely on the strength of my block, but rather proper tuning to keep an engine from blowing.
absolutely, the ka is better than an sr at boost, alex shen at sp engineering, jwt, the cosworth guys would disagree with you.
of course, proper tuning is good for boost...but all other things being equal, i'll take an iron-block over an aluminum block any day.
it's not a coincidence that some of the best boosted engines are the rb, 2jz, vg...all iron-blocks.
sure, the vr38dett is good (and it has plasma-sprayed cylinder liner bores...not your typical aluminum-engine)...but the vq's, at high levels of boost and/or power, require iron sleeves. and you're also speaking from generalizations, do you have a high-boosted vq35hr or vq37vhr?
iron-block engines are a thing of the past because of the focus on emissions and fuel-efficiency, not because of strength and/or performance...you'll notice, performance engines, for the most part, are also a thing of the past...look at honda and toyota. two of the biggest car-makers, and they don't focus on performance cars anymore. weight, i'll give you that. i agree, it's lighter.
always great to debate with you, simmode1.