slip fit parabolic

[tracerbob]

I found out that if I apply a little sand paper on a dowel to the inside of my .21 parabolic pipe it will slid over my MAC 21's header. Kinda like a trombone. If I set it up like this, am I asking for trouble?

 

[Don Ferrette]

I found out that if I apply a little sand paper on a dowel to the inside of my .21 parabolic pipe it will slid over my MAC 21's header. Kinda like a trombone. If I set it up like this, am I asking for trouble?

I run mine like that & it works great! I just taper the inside of header to give it a smooth transition. My single & twin 84's with the AB67 pipes are the same way. B)

 

[Bob Morton]

I found out that if I apply a little sand paper on a dowel to the inside of my .21 parabolic pipe it will slid over my MAC 21's header.  Kinda like a trombone.  If I set it up like this, am I asking for trouble?

I run mine like that & it works great! I just taper the inside of header to give it a smooth transition. My single & twin 84's with the AB67 pipes are the same way. B)

Hummmm a little sanding on the header works for me.Same results

Bob Morton B)

 

[tracerbob]

Don, you taper the inside of the header? My pipe fits over the header, so I wouldn't need to taper the inside of the header. Do you or should I still use a silicone coupler?

 

[Don Ferrette]

Don, you taper the inside of the header?

Yup!

My pipe fits over the header, so I wouldn't need to taper the inside of the header.

Yes you should. You want a sharp edge on the header for smooth flow, not a blunt edge. Every little bit helps, especially on a 21.

Do you or should I still use a silicone coupler?

Yes.

 

[tracerbob]

Ohhhhhhhh, I see what you meen now. You taper the inside of the header so as to not disturb the exhaust flow. I think we're on the same sheet now. BTW, are the MAC pipes/headers made to fit that way? And why are'nt you out blowin something up. It's the fourth of July! We're fixin to!

 

[Don Ferrette]

"And why are'nt you out blowin something up. It's the fourth of July! We're fixin to! "

You're talking to someone who has 25 gallons of pure nitromethane sittin' in his shop. I definitely am capable of blowing things up. Pardon me while I go light the fuse..........

 

[tracerbob]

I see your point..Don't wanna make the 6:00 news. "Mans garage goes up like an atomic bomb...details at 11:00" :lol: You have have safe and great rest of the holiday and we'll chat later. Thanks for the input.

 

[Shnick]

You shoulda seen the neighbors run when i tied a string of 500 black cats onto the back of my Nitro Quake and sent it down the road...

Wish i had a camcorder handy...

Happy Birthday America!!!!

Shnick