Quote:
Originally Posted by My5ABaby
It's my understanding (please correct me if I'm wrong) streetporting adds top end but also reduces low end torque and fuel economy. As such, if it's just for a daily driver/weekend fun car, it's not necessarily a good thing.
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well, generally speaking, if you go ape-shit with the port, then you're right. what i mean is there was a time when you could adjust both open timing and duration significantly. each has their own effect on the powerband, and of course, another effect when used in tandem. for the record, i haven't had the chance to work with a Renesis firsthand yet, and until my Rx-8 engine needs to be pulled, i probably won't get the chance.
with that said, from what i understand (from the few people that have worked with Renesis engines) there's virtually nothing to be done with open timing, so that leaves some duration changes on the primaries and a little on the secondaries. it doesn't sound like going ape-shit is an option any more. i also think the Rx-8 is somewhat unique in how the intake is setup, in that, i believe the engine would retain it's response on the low end, while gaining on the top. if i recall, i think that's what Charles Hill had reported when his car got ported years ago. at any rate, i don't want to go too far off topic on this, but i think a streetport will give you more benefits than drawbacks.
however, just for the record, i was simply saying the logic behind saying the gains are not on par with the old engines was not something i saw as a valid reason not to port. the engines are different. yes, they are both rotaries, but they are not the same, and i just think one can get in one's own way by trying (or not trying) something based on how that "thing" worked on the old engines. that's all.