DIY Exhaust Mod – Gain of 10+ HP!!!

[cWadeb]

A tad embarrassing but I'm missing something so simple I can't see it. Went out to drill a couple of holes inside the exhaust tips into the muffler chamber per the example in the earlier post.
No deal: the angle of the drill wouldn't let the bit bite, it just keeps wanting to move around, attempted to use smaller bit with the idea of working up to the 1/2" but no luck.
How did you do it?

Thanks

[tonkasdog]

Hi, I had the same problem, I started with a standard cordless drill & the bit just spun all over the inside of the pipe. I got a bigger mains powered drill, put all my weight behind it & pushed like f**k! This is why I had to go more to the back of the pipe as there is no way I could have put a hole where crioas did with the tail pipe on, couldn't get the angle. Does anyone know what is directly behind the hole I've made as per my previous post?

[blue2000s]

Originally Posted by cWadeb

A tad embarrassing but I'm missing something so simple I can't see it. Went out to drill a couple of holes inside the exhaust tips into the muffler chamber per the example in the earlier post.
No deal: the angle of the drill wouldn't let the bit bite, it just keeps wanting to move around, attempted to use smaller bit with the idea of working up to the 1/2" but no luck.
How did you do it?

Thanks

You will want to use a center punch to place a "dent" where you want the drill to go through the wall. Any hardware store has them.

[crios]

Center punch as suggested by blue2000s, or/and you'll have to push in and to an angle, agaist the wall to use as leverage, leaving some cuts on the pipe. You can also cover up the drill with ducktape where it hits the wall to help prevent these cuts. Go slow, into you establish a groove where the drill will stay in place.

See pic below:

[MidMotor2TrunkToter]

Don't be a :chicken:! Still interested to hear if anyone is enough of a rebel to drill more than 2 holes per side.

Lov'n the Crios! :dance: