Plugging the stock air box hole - Dyno numbers

///Marshall · 2nd December 2007, 02:36

Just got back from RPi today. Once again it was great to meet
Keang24, m5baller, and Myke951. We had a chance to test
what, if any, gains were to be had by plugging the hole at the
bottom of the airbox. Eloy manufactured a less ghetto method
of doing this through aluminum vs duct tape (no offense Deknight!

)
So the results are these: It appears that I lost about 10hp on the
top end BUT I gained about 5-10hp and 5-10tq in the rest of the band!
Very interesting and seems to me to be a good thing. Attached
is my dyno sheet. The blue run is without the plugged hole. Please
discuss.

Another interesting note is that another m5 owner was there today
that had headers. Otherwise his setup is exactly like m5ballers.
He ran a 428hp and 310tq (I think). Compare this to m5baller's
runs which unfortunately I cannot locate at the moment.

Edit: The only numbers I could find for baller was 404hp 293tq. I'm
thinking there are different numbers though...baller?

Myke951 · 2nd December 2007, 03:00

Yeah, The torque increase you gained is much more useable... The hp decrease will only affect your top speed... I think I did a great job with the dyno drum brake and think Eloy should hire me for that part time job operating it!

///Marshall · 2nd December 2007, 03:08

Quote:

Originally Posted by Myke951

Yeah, The torque increase you gained is much more useable... The hp decrease will only affect your top speed... I think I did a great job with the dyno drum brake and think Eloy should hire me for that part time job operating it!

LOL! Sorry, I should have acknowledged this in my original post.
Yes, rarely will you see a person operate the drum brake as adeptly
as yourself.

keang24 · 2nd December 2007, 03:37

Damm, you are fast on the post, man. Just got home.

Good to meet you all: Steve, Mike&Mike (isn't your show on ESPN radio???)

Thanks, STeve for accompany me back to my car

I didn't consider this trip a waste for my stupidity, meeting other members and a COUPLE of beers is PRICELESS>

///Marshall · 2nd December 2007, 03:49

Quote:

Originally Posted by keang24

Damm, you are fast on the post, man. Just got home.

Good to meet you all: Steve, Mike&Mike (isn't your show on ESPN radio???)

Thanks, STeve for accompany me back to my car

I didn't consider this trip a waste for my stupidity, meeting other members and a COUPLE of beers is PRICELESS>

Oh man...you make that sound kinda bad! Oh well.

Sorry you have to make that trip again on Monday...You're going
to hit some serious traffic if you try to leave early. But headers
are worth it.

m5baller · 2nd December 2007, 04:23

Stephen, you correct, mine is 404 hp. A guess is the headers equate to 24 hp to the wheels!

Kenny, what's the inside to your "stupidity" comment? You have to come back up on Monday? Is Eloy installing the headers all day on Sunday and Monday?

For clarification, we had more than a "couple" of beers!

Stephen, Eloy, great to see you guys again! Kenny, a sincere pleasure to meet you in person. I don't know what it is, but I'm excited for other guys getting their cars modded!

Thinking about it, it like, like watching a porno! Seriously, I don't know about you, I'm not having sex! I'm watching some other dude get off on some chick, and it seems to satisfy some need! I guess its in our DNA. Watching you guys get your new mods is my substitution for porno!

I'm gonna run an tell my wife, I'm cured!!!!

Edit: Kenny, I think I understand, you couldn't get a car and you drove the M home! Sorry, but it was worth it. GOOD LUCK with the headers!

keang24 · 2nd December 2007, 04:38

Quote:

Originally Posted by m5baller

Stephen, you correct, mine is 404 hp. A guess is the headers equate to 24 hp to the wheels!

Kenny, what's the inside to your "stupidity" comment? You have to come back up on Monday? Is Eloy installing the headers all day on Sunday and Monday?

For clarification, we had more than a "couple" of beers!

Stephen, Eloy, great to see you guys again! Kenny, a sincere pleasure to meet you in person. I don't know what it is, but I'm excited for other guys getting their cars modded!

Thinking about it, it like, like watching a porno! Seriously, I don't know about you, I'm not having sex! I'm watching some other dude get off on some chick, and it seems to satisfy some need! I guess its in our DNA. Watching you guys get your new mods is my substitution for porno!

I'm gonna run an tell my wife, I'm cured!!!!

Edit: Kenny, I think I understand, you couldn't get a car and you drove the M home! Sorry, but it was worth it. GOOD LUCK with the headers!

Pleasure is all mine. Just to meet you guys is worth a trip up itself. I guess nobody would expect the car rental to close at noon

Still got some beers left in the fridge at RPI. Help yourself when u there.

deknight · 2nd December 2007, 06:03

Quote:

Originally Posted by ///Marshall

Just got back from RPi today. Once again it was great to meet
Keang24, m5baller, and Myke951. We had a chance to test
what, if any, gains were to be had by plugging the hole at the
bottom of the airbox. Eloy manufactured a less ghetto method
of doing this through aluminum vs duct tape (no offense Deknight!

)
So the results are these: It appears that I lost about 10hp on the
top end BUT I gained about 5-10hp and 5-10tq in the rest of the band!
Very interesting and seems to me to be a good thing. Attached
is my dyno sheet. The blue run is without the plugged hole. Please
discuss.

Another interesting note is that another m5 owner was there today
that had headers. Otherwise his setup is exactly like m5ballers.
He ran a 428hp and 310tq (I think). Compare this to m5baller's
runs which unfortunately I cannot locate at the moment.

Edit: The only numbers I could find for baller was 404hp 293tq. I'm
thinking there are different numbers though...baller?

Man sorry I missed you guys, I did not see the pm until it was too late. I have to take my car in to see what happens with my results. I would think that blocking the holes would deliver more exaggerated results in real life where there is more air flow. The funny think about those results is that my car feels more free at top end, where as before it felt restricted when the holes were not plugged. See should of used duct tape!

///Marshall · 2nd December 2007, 07:23

Too bad you couldn't make it. Yeah, I'm not sure what to make
of it petering out at around 7900rpm. It's not something I'm going
to lose sleep over though. I'm pretty happy that I'm getting more
power in the "usable" range.

I'd be interested in seeing your results. You have one strong car!

keang24 · 2nd December 2007, 07:31

Quote:

Originally Posted by ///Marshall

Too bad you couldn't make it. Yeah, I'm not sure what to make
of it petering out at around 7900rpm. It's not something I'm going
to lose sleep over though. I'm pretty happy that I'm getting more
power in the "usable" range.

I'd be interested in seeing your results. You have one strong car!

Or you can redyno again before the headers install, just to verify. Doesn't make sense why lose 10hp even at the peak, but more torque make sense.