D16Y7 vs D16Y8: Why did Honda do it?

[Spacemonkey71]

This has bothered me for a while and I'm curious for an answer: Why does the D16Y7 engine have that weird intake manifold layout (specifically the verticle throttle body) instead of a plenum like the Y8?

Here's a theory of mine: The Y7 may exist because a Y8 manifold design without the VTEC on the head might cause only a very small loss in performance as seen by the "average consumer". There's only 20hp difference as it is, and that isn't an insane amount. How much of that 20hp is b/c of the Y8 engine's better intake manifold? Has anyone ever dyno'd a Y8 with VTEC "on" and a Y8 without VTEC just for the hell of it?

>>>> I'm not completely thickheaded, I know the SOHC VTEC will show bigger hp/tq because of the adjusting valve lift, but is it enough of a difference to justify a couple of thousand $$$ more (cost of a Civic DX vs Civic EX; i know the interior trim and rims are better in an EX, but you know what I mean)

I'm just curious b/c I've got a Y7 engine now and I've had a Y8 in the past. I can tell the difference when I think about driving each of them, the Y8 is definitely stronger, but it makes me wonder why they built the Y7's intake so radically different. Why did Honda design 2 intake manifolds instead of using the same one and just disabling the VTEC on the head?

It's a stupid question from a stupid person. aka: intellectual masturbation :jerkit: junkfood for though

[PSINXS]

Thats like wondering why Porky Pig wears a jacket but no pants. We just dont know.

[Spacemonkey71]

LOL! Maybe that's not Porky's tail behind him, he's just doing a "tuck back"

"How many licks to the center of a tootsie pop?"

Boredom, high fever, and narcotic cough medicine = I wish I could feel my teeth...... thank god for Adult Swim on the Cartoon Network and peanut butter M&M's

......... i shouldn't "dope-and-post", should I ? :confused:

night,night

[Vteckidd]

Y8 with Vtec needs the bigger manifold.

Y7 was never intended for performance, it was built for Gas Mileage. the vertical throttle body is a pain in the ass

[Kevykev]

i have a Y7 manifold if anyone needs one.

[scttydb411]

the y7 is strictly built for economy. the downdraft tb and runners are what help it to give it at least some semblance of tq since there is no vtec to help it in the high end. throwing a y8 im in a y7 will not really help performance unless you are trying to get it to flow more if you're boosted.