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  #1  
Old 02-12-2017, 04:31 PM
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RONSIM RONSIM is offline
 
Join Date: Feb 2008
Location: Largo, FL
Posts: 732
Default Exhaust -- four into four?

Has anyone done the 4 into 4 exhaust on a -4? and, if so, any issues on the install?

Thanks,

Ron
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  #2  
Old 02-12-2017, 08:47 PM
ESPRV4 ESPRV4 is offline
 
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Location: Esperance West Australia
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Default Dave Taylor

Hi Ron

My -4 has the Vetterman 4 pipe exhaust. Larry convinced me to go that way and I'm glad I took his advice.! Very easy to install, and efficient as well as sounds GREAT ! The only issue I came across was under the tight -4 cowl it was difficult to fit a carb heat muff. If your injected then no probs.

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Dave
VH-HOC
0320 wood prop
60+hrs
Donation due this year.
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  #3  
Old 02-13-2017, 04:25 AM
fixnflyguy fixnflyguy is online now
 
Join Date: Jan 2006
Location: Winston-Salem, N.C.
Posts: 778
Default Do it !

I have the 4/4 Vetterman on my -4, and its a great system..a unique sound like no other. I have a home-built heat muff and carb heat muff..no issues at all. On another note..we visit Largo Fl. a couple times a year, but havent flown the -4 down yet. Send me a PM if youd like some detail pics of my 4/4 set-up. There are some on VAF from way back, but Im not sure where.
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  #4  
Old 02-13-2017, 04:52 AM
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RONSIM RONSIM is offline
 
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Location: Largo, FL
Posts: 732
Default Thanks for the replies

I feel better about the "challenge" -- helping a fellow RV'r whose original system, 4 into 1, (many years old!) went south on him.

Lots of RV'rs at KCLW -- come on down and warm up!

Ron
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Last edited by RONSIM : 02-13-2017 at 05:13 AM. Reason: 4 into 1
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  #5  
Old 02-13-2017, 02:52 PM
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smokyray smokyray is offline
 
Join Date: Jan 2005
Location: TX32
Posts: 1,588
Default Way back when...

Quote:
Originally Posted by RONSIM View Post
Has anyone done the 4 into 4 exhaust on a -4? and, if so, any issues on the install?

Thanks,

Ron
Ron, I bought one of Larry's first 4 pipe systems for my RV4 when his business and the RV world was relatively new.
My performance was always excellent but more importantly that same system has 2500 hours, 25 years of use and NO cracks whatsoever...something to be said for quality....If the 4 into 4 is half as good you should love it...
V/R
Smokey

PS: what type system are you referring to? Vetterman or something else?

Last edited by smokyray : 02-13-2017 at 06:08 PM.
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  #6  
Old 02-13-2017, 08:17 PM
Michael Henning Michael Henning is offline
 
Join Date: Jun 2011
Location: Nashua, NH
Posts: 394
Default

I have the 4/4 Vetterman system, 200hp injected, sounds outstanding and no problems at all. If you are doing a smoke system, get two injectors.
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  #7  
Old 02-14-2017, 07:09 AM
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Larry DeCamp Larry DeCamp is offline
 
Join Date: Apr 2010
Location: Clinton, Indiana
Posts: 450
Default What does 4/4 mean ?

I just ordered a new 0360 system for RV4 from Clint. Larry V was very convincing that 4 pipes with 20 degree down turns was optimum. I had asked Clint if a 2 into one collector was available for my 0320 / -3 and he said combining pipes would reduce HP 15%. Larry also shared his experience regarding noise. He said a straight pipe pressure pulses interact with the fuse bottom and cause "drumming" due to pulse waves attaching to the fuse. Thus 20% down is preferred.
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  #8  
Old 02-14-2017, 07:51 PM
Michael Henning Michael Henning is offline
 
Join Date: Jun 2011
Location: Nashua, NH
Posts: 394
Default

Mine are turned down, no pulsing. He makes a great exhaust.
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  #9  
Old 03-05-2017, 09:15 PM
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Xkuzme1 Xkuzme1 is offline
 
Join Date: Jan 2015
Location: KC, MO
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Default

I also have the 4 pipe system. I always get compliments on how my airplane sounds. There is a whole lot of exhaust under my cowl. Very tight fit, but heater works great. Carb heat works great. Sound is great. Sound in cruise... perfect.

You won't be sorry.
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  #10  
Old 03-06-2017, 06:57 AM
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grubbat grubbat is offline
 
Join Date: May 2012
Location: Ga
Posts: 439
Default 20deg down

I was getting the drumming from the power pulses and the 20deg did the trick. Vetterman is the way to go!

Quote:
Originally Posted by Larry DeCamp View Post
I just ordered a new 0360 system for RV4 from Clint. Larry V was very convincing that 4 pipes with 20 degree down turns was optimum. I had asked Clint if a 2 into one collector was available for my 0320 / -3 and he said combining pipes would reduce HP 15%. Larry also shared his experience regarding noise. He said a straight pipe pressure pulses interact with the fuse bottom and cause "drumming" due to pulse waves attaching to the fuse. Thus 20% down is preferred.
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