exhaust tone changes, deeper. when raising VE.

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Jul 28, 2001 | 08:02 PM

snflupigus

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From: Tempe, AZ

Car: 92 RS, 02 Tacoma, 2 73 Porsche 914s

exhaust tone changes, deeper. when raising VE.

this is attributed to what most likely? the increase in fuel demanding more air? what?
minor increase too. .4+ across the board from 1600rpm down. from stock.

this is a stock l03 by the way. im just messing with stuff to get my feet wet for when i need to really have to tune my 69s engine. which i have no basis for. since its a 307 made 30 years ago

. hell i dont even know if its a stock 307. also it has a powerglide so that will be a whole different story for tuning i bet. we will see.
but for now.

maybe you can explain why this note change occurs.

Jul 30, 2001 | 06:51 PM

snflupigus

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From: Tempe, AZ

Car: 92 RS, 02 Tacoma, 2 73 Porsche 914s

ttt

Jul 30, 2001 | 08:58 PM

FastBroker

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The combustion chamber gasses are just burning differently, ie later into the ex manifolds, as with a nice cam change exhaust note difference. I wouldn't read into it too much...

Jul 30, 2001 | 09:58 PM

Grumpy

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From: In reality

Car: An Ol Buick

Engine: Vsick

Transmission: Janis Tranny Yank Converter

Quote:

<font face="Verdana, Arial" size="2">Originally posted by snflupigus:
this is attributed to what most likely? the increase in fuel demanding more air? what?
maybe you can explain why this note change occurs.</font>

Due to the difference in the exhaust gas velocity.
The crackle in a fuelers exhaust is from each pulse still being mach+, and the exhaust pulses hit the atmospheric air.