Intake Manifold Question?

[shofan33]

I recently disassembled my intake to clean it. And i saw that after you take off the butterflies there's tubes inside the tanks. I was wondering if I discard them will it perform better or sound better? Or if i pierce them will it make a supercharger whine after 4k? Please help.

 

[TheKrazyRaven]

i took mine out, really didnt make a difference

i was told they just restrict the flow more than anything

 

[Ishodu]

The are there to tune the length of the short runners, you may get a little bit of top end, (may) at the cost of a loss of low end TQ.

 

[Rockledge]

What Marcel said. You have to keep in mind that there is a certain theory behind a "tuned" intake.

http://auto.howstuffworks.com/question517.htm

I'd have to think that Yamaha knew what they were doing when they designed the SHO's upper intake. It certainly looks like they spent a lot of time on it (somebody recently posted links to some of the patents - interesting stuff). So IMO it's probably a better idea not to fiddle with the horns.

 

[AREA 91]

I believe the general concensus here is to leave the "horns" in your intake, unless you have BBB's or EX runners.

 

[nkb93]

When I removed the intake horns, my butt dyno sensed a slight loss in torque right around 4k RPM (when the secondaries snap open), but the sweet intake sound that resulted was worth it, IMO.

 

[somedude_001]

The are there to tune the length of the short runners, you may get a little bit of top end, (may) at the cost of a loss of low end TQ.

FYI the intake horns he is refering to are on the secondaries (short runners) so there will be 0 loss at low rpm's so the only effect is at 4K+

 

[shofan33]

Well i bought my bbb's and was going to slap'em on without the "horns", that will make the personing im passing on the freeway very scared!