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Old 04-03-2012, 07:27 AM   #1 (permalink)
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Best Exhaust Note - V6 Category

To my mind a in line 6 engine makes the best noises next to a V12, and all of the 4 cylinders are a pale substitute, but I came across a V6 that sounds petty darned good - a VW VR6. Brilliant exhaust system and remeniscent of a race car as it winds by you. Wish our cars sounded half as nice.

It is a narrow V with only a 15 deg. separation, so it fits in places made for a 4 - and would add some power in an NA and sound a lot better....... The engine uses a single had (like the old V4 Lancias) with DOHC and is quite compact.

It is two decades older than the Ecotec so of course isn't as advanced in terms of technology, but it is still a pretty sweet motor - here's a Turbo Magazine article on a 686 BHP project they did.

Volkswagen Golf VR6 Turbo - EIP Tuning Turbo Kit - Turbo & High-Tech Performance Magazine

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Old 04-03-2012, 07:41 AM   #2 (permalink)
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Very nice

I like this one

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Old 04-03-2012, 11:07 AM   #3 (permalink)
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i really like the G35/37 exhaust note. even at idle you can hear it a little but at take off it sounds amazing
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Old 04-03-2012, 12:09 PM   #4 (permalink)
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^ I was about to say, I really like the Nissan VQ exhaust notes.
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Old 04-04-2012, 10:36 AM   #5 (permalink)
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That does sound like a nice V6. My only experience has been straight 6s fans always complained that they could never make them sound as nice as a V8s, and if if didn't sound as nice as a V8 than it couldn't possible perform as well as one.

Hijack alert. I was just wondering yesterday how how does the number of cylinders/displacement affect performance? In other words, if the CCs of a 4 cylinder equal the CCs of a 12 cylinders why do they sound/perform so differently?

This is coming from wondering why since modern tech is improving the performance of V8s every year why companies don't consider producing smaller V8s? You'd still have the allure of a V8 without being penalized as much by the there's no replacement for displacement crowd (even if it could be proven that a 4 or 6 can perform just as well). Because for whatever reason there still seems to exist the mentality that it's not the displacement that counts as much as it's the number of cylinders.

I imagine V12 lovers think the same way about V8s.
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Old 04-04-2012, 11:04 AM   #6 (permalink)
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Quote:
Originally Posted by LowLife1 View Post
Hijack alert. I was just wondering yesterday how how does the number of cylinders/displacement affect performance? In other words, if the CCs of a 4 cylinder equal the CCs of a 12 cylinders why do they sound/perform so differently?

This is coming from wondering why since modern tech is improving the performance of V8s every year why companies don't consider producing smaller V8s? You'd still have the allure of a V8 without being penalized as much by the there's no replacement for displacement crowd (even if it could be proven that a 4 or 6 can perform just as well). Because for whatever reason there still seems to exist the mentality that it's not the displacement that counts as much as it's the number of cylinders.

I imagine V12 lovers think the same way about V8s.
To get power in a race engine requires RPM. To keep it together requires a fairly short stroke, and thus a large bore, which works with the other requirement that you need enough combustion chamber area for large enough valves, although going to a 4 or even 5 valve lay out can optimize a bore that might be cramped if you were using only 2 valves.

There are several nice small V8s about - Lexus, BMW etc., and in the old days, Daimler had a 2.5, and the Lamborghini Urraco came with as low as a 2 litre V8.

Having the extra cylinders (and friction) isn't worth it though, if you can get a 4 or 6 that will perform the same. The coming thing today is competent V6s - the new Ford is a good one.

As for sound, yes the V12s sound really, really good, although many people brought up to believe that only a big slow reving V8 is manly will say that only a V8 gets their juices flowing....
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Old 04-04-2012, 11:20 AM   #7 (permalink)
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PS - small pistons and lots of them has a point of diminishing returns even in racing. BRM found that out with their V-16 F1 engines.

They had pistons less than 2" in diameter and put out 400 BHP/litre - 600 BHP out of under 1500 cc. back in the 1950s. Sounds a bit frenetic....understandable at 12,000 rpm.


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