Good News Concerning the D4-S Boxer!

[White Comet]

Originally Posted by Gost

Unfortunately, I'm really unhappy with the direction Honda/Acura has been heading which is why I'm looking elsewhere for my next car.

I don't blame you. Honda was my entry point into this wonderful import car world, and their cars of late have been shit. This latest Si has been too little, too late; the RSX was canned; the S2k now canned with no real successor in sight; the NSX successor has been on again, off again (and they weren't going to make it even MR!); the new TSX is uglier and not more powerful, the Accords keep getting fatter...

Honda is going to find out just what Toyota is now starting to. Lose the enthusiast market, and it will eventually make its way into the general public perception as well.

[Gost]

man I never even liked the TSX. That's when Acura decided to change their target audience and wanted a more mature sophisticated image to compete with BMW and Lexus. And the TSX is their entry level model. They should have kept the Integra/RSX. I'd still take a DC2 over a DC5 tho.

[micmic]

Originally Posted by Shevon

K i am not familiar with boxer engines what is the difference between UEL headers and El headers and what they all about. aal i know is impreza?sti sound like its choking or sputtering.

This is a good comparison of UEL vs EL.

[cyde01]

i like the clean sound of inline 4s way better than the boxer burble!

[Shevon]

Originally Posted by cyde01

i like the clean sound of inline 4s way better than the boxer burble!

agreed though the rumble could take some getting use to

[YourFearlessLeader]

hell no! that rumble is a great characteristic of the sub motor!

[NESW20]

Originally Posted by OldSkoolToys

Actually TVIS was developed to improve low-end torque, whereas VTEC was made to improve high end power, if I'm not mistaken?

they basically do the same thing: allow for different intake flow characteristics for different RPM's. both allow for a more "normal" low RPM torque curve, and then allow for better-breathing high-RPM operation. more torque and more power. different ways to achieve the effect, but still going after the same thing.

-Mike

[micmic]

Originally Posted by cyde01

i like the clean sound of inline 4s way better than the boxer burble!

Agreed... I love the sound of B18.

[aspera]

Originally Posted by NESW20

they basically do the same thing: allow for different intake flow characteristics for different RPM's. both allow for a more "normal" low RPM torque curve, and then allow for better-breathing high-RPM operation. more torque and more power. different ways to achieve the effect, but still going after the same thing.

-Mike

Don't forget to include Subaru's TGV (Tumble Generator Valves) and their camshaft phasing technology.

Just like TVIS, TGV gets ripped out to make big power. Let's hope the new car doesn't have it.

I like the boxer rumble, but I'd give it up to make power. BTW, the best sounding engines have an offbeat rumble (Harley Davidson) or have a whole bunch of cylinders (Ferrari V12).

Going back to the original post...did anybody understand the part about the intake runners? It sounded like the engine might use both long and short intake runners. That's sort of like TVIS, but each runner would feed both intake valves instead of switching between one valve (swirl) and both valves (tumble).

EDIT: I just re-read it and I think he confused me by using the word "runner" instead of "primary". Runner is an intake manifold term.

[scape]

well subie also has AVCS: http://www.drive.subaru.com/Win05_WhatsInside.htm but that's been around since 2005sh i think

[Lincoln Stax]

I'm not sure why disguising the sound of the engine so it sounds like something it's not is considered good news. If it's got a flat-4, then I want it to sound like a flat-4.

[NESW20]

Originally Posted by aspera

Don't forget to include Subaru's TGV (Tumble Generator Valves) and their camshaft phasing technology.

Just like TVIS, TGV gets ripped out to make big power. Let's hope the new car doesn't have it.

I like the boxer rumble, but I'd give it up to make power. BTW, the best sounding engines have an offbeat rumble (Harley Davidson) or have a whole bunch of cylinders (Ferrari V12).

yeah, my car doesn't have any TVIS hardware any more. i'm not making as much power as i'd like, but that's another story...

i honestly don't think i'd want the FT to sound like a subaru UEL header boxer. everytime i started my car, i'd look around for the WRX/STI near by, and then be confused by its absense. my GF's MY07 2.5i w/ Prodrive round tip sounds FANTASTIC, and no real hint of the boxer rumble. i'd want something like that for this car, but smaller and more rev-happy.

-Mike

[OldSkoolToys]

Originally Posted by aspera

Don't forget to include Subaru's TGV (Tumble Generator Valves) and their camshaft phasing technology.

Just like TVIS, TGV gets ripped out to make big power. Let's hope the new car doesn't have it.

TVIS doesn't get ripped out to MAKE big power, it gets ripped out in LIEU of big power.

IE: you tune/upgrade the engine to the point that the powerband has changed so much, TVIS is no longer helping you, rather, hindering you by how it manipulates the air-inflow.

Thats the standard in 4A-GE engines at least. Taking off TVIS before doing any major tuning on a 4A is typically seen as being a mistake, as its there to actually help the car in low-revs.

[subyota]

i think i'm in the minority among the suby faithful, i love the sound of my EL headers, plus the performance u get from them is so much better than the heavy ass stock UEL headers.