Re: dual exhausts

[Trisha Bethen <trishab@mv.mv.com>]

On Tue, 20 Aug 1996, Graydon D. Stuckey wrote:

> On Tue, 20 Aug 1996, todd candey wrote:
> 
> > So, it appears that the S6 is a car with an inline 5cyl, 20v turbo motor.
> > Correct?
> 
> How do you divide 2 into 5 evenly?  It wouldn't make alot of sense to 
> split it 3 and 2 unless you sized the twin exhausts perfectly so that a 
> smaller one had 2 cylinders and a slightly larger one had 3 cylinders.  
> They other option would be to split one cylinder into  two, but there 
> would still be a chance that the split cylinder would flow differently as 
> compared to the rest of the cylinders.  The only other option would be to 
> have a small plenum after the headrer to mix all the gases, then run them 
> down twin pipes, but that would defeat some of the purpose of duals in 
> the first place.
> 
> > Could a dual exhaust really make enough of a performance difference to 
> > justify the related expense in hardware? Anybody ever thought about 
> > retrofitting this to other 20v turbo cars, or even 10v turbo cars?
> 
> A dual exhaust might be a little easier to package into the restricted 
> space of the 5KCSTQ cars.
> 
> > Could this be a way to get even less restrictive exhaust than say a 
> > single 3" system?
> 
> I think I'd still go for a 3" system.  (or a 2.5" system with a separate 
> 1.25" pipe for the wastegate only.  Just for grins :-)
> 
> Later, ---------------------------------------------------------- 
> Graydon D. Stuckey 	'85 Mazda RX7 GS, no toys 
> graydon@apollo.gmi.edu 	'86 Audi 5000 CS Turbo Quattro, has toys
> Flint, Michigan USA	'89 Thunderbird SC, lotsa toys
> 
> 
> 
You were talking splitting the ports......such a pain and a definate drop 
in HP......evidenced in the siamesed ports of the older Capris.......