Spooky expansion

aero07 · #1 11-05-2009, 11:58 AM

Just wondering if anyone has tried the expansion chamber from
Spooky tooth?

DonnnN · #2 11-05-2009, 01:30 PM

I heard it was reallllly loud!

xmikex · #3 11-05-2009, 06:02 PM

i want to know about this also, been looking into getting one for jsurt running without a baffle

1 low 64 · #4 11-08-2009, 10:08 AM

I put one on and couldn’t be happier with the performance gain and the plug burns much cleaner. You get more smoke at idle but it does clear out at speed and depending on your engine placement you may have crank clearance issues. Yes it is very loud and I love it, it’s not deafening, but just loud enough to let the cars around you know that your there. Oh and I think it looks great.

DonnnN · #5 11-08-2009, 03:27 PM

I'm thinking of getting a sbp exhaust pipe.. it would be easy to get it on my bike and tune..

**BarelyAWake** · #6 11-09-2009, 05:06 AM

Thanks 1 low

While I run the SBP pipe - it's good to get a review of another, particularly Spooky's! Didja have crank clearance probs? How did you fix it if ya did? Where in the rpm range did you notice the most change?

Questions... I haz dem

DonnnN · #7 11-09-2009, 09:45 AM

Quote:

Originally Posted by BarelyAWake

Thanks 1 low

While I run the SBP pipe - it's good to get a review of another, particularly Spooky's! Didja have crank clearance probs? How did you fix it if ya did? Where in the rpm range did you notice the most change?

Questions... I haz dem

Hey BA.. How is your SBP pipe? How much more power did you get?

Am seriously considering ordering one..

**BarelyAWake** · #8 11-09-2009, 10:04 AM

How much "more" is a tough question as my top speed didn't change much, there's a definite low to mid RPM effect that does wonders for my acceleration. On a 1/8 mile stretch on my way to work I was able to achieve and hold top speed (from a dead stop), whereas before on the stock pipe it was still winding up when I got to my turn.

I wish we had a dyno for this sorta thing lol

Here's some info;
http://motorbicycling.com/f3/skeptic...ipe-11282.html

...and me runnin' around in circles

;
http://motorbicycling.com/f15/sound-...ber-12466.html

1 low 64 · #9 11-09-2009, 11:18 AM

The biggest improvement was mid to high rpm I picked up about 4-6mph. as for the crank clearance I widened them about 2” to clear the pull start and gave just enough room, but it probably would be a non issue on a mountain bike frame since on average the engine seems to mount higher

**BarelyAWake** · #10 11-09-2009, 11:25 AM

Interesting - I'd bet the difference is in the length of the header pipe, Spooky's is real short in comparison to the SBP one, which seems to go on forever...

Nice that they effect opposite ends of the powerband, good to have a choice out there for people's different interests! I for one got exactly what I hoped, an increase in acceleration - I can see a lot of folks that'd want top end tho.