Two seperate exhausts

OberonViking Seriously Crusin Dubber

124 posts · joined Mar 2008 · 14 Dec 2008, 8:35 am

#684429

Can you set up an air-cooled vw engine to have a left and a right exhaust that do not meet in any way?

Just curious to know if it is something that can be done.

I think it would be harder to balance the engine, especially if it was a twin carb set up. I reckon it would look cool though.

1970 Baja - waiting in the paddock for some TLC.

Joel Now containing 100\% E-Wang

9,368 posts · joined Feb 2006 · 14 Dec 2008, 9:01 am

#684431

twin cannons for buggies have been around for decades and few have been adapated to beetles/kombis

im stuck working on 3 trikes with them and trust me from a performance point they suck
bottom end is crap with twin exhausts

for proper scavaging effects an equal length 4into1 header is best

that siad tho alotta ppl run twin cannons on buggies and bajas etc and are happy with them but most of those ppl havent ever experienced their cars with a properly tuned zorst system

barls Administrator Causer of Chaos and Mayhem

9,473 posts · joined Jun 2004 · 14 Dec 2008, 9:56 am

#684437

i run a twin muffler set up on chaos and im just about to change it back to a single due to overheating problems

“We all pay for life with death, so everything in between should be free.” Bill Hicks
the chaos project - click me

Bizarre Moderator The artist formerly known as blue74l

12,789 posts · joined Aug 2002 · 14 Dec 2008, 9:56 am

#684438

A "true" fully merged exhaust will have a pipe order the same as the firing order -1-4-3-2

To do this properly you need that extra length to get the pipes round to line up
Most semi-merged shorter exhaust go 1-4-2-3

see here trace it out - you can clearly see 1 and 3 next to each other

What i am trying to say is the best is the fully merged full scavenging set up

The worst would be single exhausts

Dual cannons is 2nd last

Futue te ipsum!!!

Bizarre Moderator The artist formerly known as blue74l

12,789 posts · joined Aug 2002 · 14 Dec 2008, 10:02 am

#684439

OberonViking wrote:. I reckon it would look cool though.

You are right on there though

Richard Holzl built a "clodhopper" buggy
HUGE mudtyres on the back
Motor cycle tryres on front 4" Fuchs
2L dual webers and these cannons out the back

LOVED IT

A picture here
http://forums.aussieveedubbers.com/viewtopic.php?tid=27919&page=1#pid224791

candy apple red now

Futue te ipsum!!!

DirkHedde Slammed & Awesome Dubber

91 posts · joined Oct 2008 · 15 Dec 2008, 2:19 pm

#684567

four into one systems would be the way to go for performance and sound i reckon. the dual cannons ive heard sound like a sloppy fart after a feed of green apples. or a harley.

modulus Veteran Volks Folk

2,009 posts · joined Jul 2003 · 15 Dec 2008, 3:05 pm

#684574

Eveny on V8s, V12s and the like, for a street engine a balance pipe between the banks adds torque and, for moderate amounts of cam timing, even horsepower.

hth

Peter Hill
1975 Type 2 Double Cab
modulus.com.au

cram Officially Full-On Dubber

368 posts · joined Jan 2005 · 15 Dec 2008, 4:22 pm

#684579

for a buggy - I'd like to see a merged exhaust going forward - merging maybe over the gearbox?
Then twin pipes coming out the sides like the 'canons'. These can then be protected (along with the belt) from soft hands.
The benefit is that pipe work is not hanging out the back - cage can be shorter and doesn't need all the crappy mesh over it...