[Shotimes] Re: Dyno day for my project

[Donald Mallinson]

Too big of an exhaust WILL reduce torque on many engines.  
And we aren't talking scavenging here. So at some point, zero 
restriction isn't good.

Maybe the 3" is just perfect, but 300+ HP engines have used smaller size 
pipes and gotten better results.  That is from experience.

Just wondering if he thought about it.

Don Mallinson


Chris Mayfield wrote:

>There's no reason not to run a very large exhaust, so long as it is
>built to insure proper exhaust velocity. SHO or otherwise, if you
>build it properly you will gain power everywhere. Backpressure does
>*not* improve low end torque.
>
>Nice dyno numbers - 50 whp gain is very impressive. Whats next?
>
>Chris
>
>On 4/16/05, Alan Fanning <Awfanning@earthlink.net> wrote:
>  
>
>>3" exhaust for a 2 liter engine? Shouldn't see any back pressure in that!
>>
>>   Alan
>>
>>
>>Scott wrote:
>>
>>    
>>
>>>Focus Sport UDP, Focus Sport CAI, Focus Central Cam Gears, 2000 ported and
>>>matched intake, Custom 3" Exhaust, Focus Central 4-2-1 Race Header, Focus
>>>Central Flex-Pipe, Focus Central 65 mm TB, Screamin' Demon Coil Pack, FR/Denso
>>>wires/plugs, Focus Sport custom tuned SuperChip, Focus Sport Cylinder Head
>>>(10.6-1) and Kent stage 3 cams.
>>>      
>>>
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>>    
>>
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