GSR switches to vtec at 4400 rpm on the 94-01 models, which is very low.. but because of the intake manifold design they were able to produce more low end torque that way. I'm not sure about the older gens. The Redline is 8,000 (arguably). USDM GSR is rated 170 HP.. the JDM version is closer to 180 hp. And in reality.. it's much lower on a dyno as most everyone knows.
JJ240 wrote:As thought provoking as you may think that post was in actuality it was pretty stupid. Most of the people here understand what vtec is and what it does. Ram air is fairly useless providing minimal gains and only at high speeds and I dont see what connection this has to vtec integras. Compression doesnt affect anything except horsepower and torque really so why mention it separately. By third gear power to weight ratio isnt that important anymore it comes down to pure HP. Isnt volumetric efficiency and hp per liter about the same thing? And wtf is up with ::and lets not forget Hp and torque:: I dont think anyone has forgotten that considering it was in 80% of the posts so far. Your post is worthless, you didnt say anything regarding what people were discussing. Maybe if you had thrown out some 1/4 mile timeslips of integras or dyno printouts of integras we would have gotten some use from your post. You dont need to come here and bash people it isnt welcome. Im sure a nice forum like
http://www.honda-tech.com loves having fools like you running around connecting their name with rant posts like yours.
So maybe I didn't read 80% of the posts.. I stopped after the first couple of retarded ones. I'm not trying to provoke anything.. but I think rather than sitting around whining about "vtec integra" *some* people could be learning about interesting facts instead of making uninformed comments like "VTEC is not all that great unless its from a NSX" or "the old b18c5 type r's have such weight loss."
Which is why I threw out those topics. Some of them were irrelevant.. I can see that.
So uh yea.. sorry for not reading the entire thread. Just for you (I bet you're proud) I went back and read it... and I'll admit now, my post looks way out in left field. I was in a hurry and I didn't stop to notice that not everyone here is an idiot.
Now.. since you're wondering, there is a connection between vtec (or "vtec integra" as you say) and ram air at high rpms. Which is just that. Vtec allows more air to become rammed into the cylinder as engine rpm increases. That is the sole purpose of its existence. I don't see why you say it has "minimal gains." If it was minimal gains, you wouldn't see these large humps at 5,700 rpms:
This is a stock ITR dyno example of which I found. You said I should post one so here it is...
Volumetric efficiency can be tied into HP/Litre, but when discussing it by itself it really doesn't refer to horsepower. It's simply the relationship between the amount of air required to fill the cylinder at atmospheric pressure vs. the amount of air that fills the cylinder during the intake stroke. Intake/exhaust system design and valve timing affect volumetric efficiency the most when were talking about a n/a motor. The more volumetrically efficient your engine is, the more power it will make at high rpms.
Anyways, your comment about me mentioning honda-tech wasn't too pleasing. I mentioned that site because that is where I spend alot of my internet time and I've done alot of learning there. Chances are if you have a question about anything that relates to Hondas, you'll find an answer there.
Anyways, I didn't come over here to troll or start sh*t, I came over here to learn and help others. Sorry that my last post was kindof F'd up... I'm done.