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The Pub For General Automotive Related Talk |
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#1 | ||
Regular Member
Join Date: Apr 2016
Posts: 44
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Hi All, I was reading the forums on exhaust systems a while back where somebody commented from my recollection that the barra six sounds like crap because of the variable valve timing. I dont know whether their is any truth to the comment but I do agree that these engines do not sound as tough as the older generation RB26 turbos for example.
Can a turbo barra sound as tough as those old turbo skylines? Could I just run standard cam timing on my G6ET if I preferred sound over substance and was not chasing performance and/or economy? Cheers |
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#2 | ||
Donating Member
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Posts: 11,429
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In what way does it sound like crap?
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#3 | ||
Regular Member
Join Date: Apr 2016
Posts: 44
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I didn't say they sound like crap I think. I just said that in my opinion they did not sound as tough as the older skylines. Happy to be proven wrong and pointed in the direction.
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#4 | ||
Regular Member
Join Date: Apr 2016
Posts: 44
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Just reread my original post an yes I did say crap - sorry my bad. FYI my exhaust is completely stock but I have no intenion of changing it (unless I can get one of those muffler deletes in NZ) until it's not my daily driver. Probably 5 years time
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#5 | ||
FF.Com.Au Hardcore
Join Date: Sep 2010
Location: Melbourne
Posts: 934
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In the way that it sounds like a leaf blower.
Factory RB26 engines feature solid cams.. Most modified RB 2.5 - 3.0L+ engines use wild duration cams either hydraulic or solid. Add in the fact that it's a smaller capacity and a different design of motor and you have your answer. I've heard one good Barra in my life and it was Dion Amato's de-stroked 3.7L [GMKILR] on youtube |
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#6 | ||
Donating Member
![]() Join Date: Feb 2008
Posts: 11,429
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Okay, that makes sense. I can understand the leaf blower sound being an issue. Yet some like it.
A good performance exhaust system, starting with a set of headers will get rid of that. Although, some of the turbo exhaust manifolds aren't too bad compared to the old style logs. On the flip side, I'll offer, as inline 6 cylinder engines with 120* crankshafts the engines have enough in common to inherently make similar exhaust notes; differences being pulse frequency (rpm) and sound frequency of each pulse (cylinder displacement). The modified part, we all know how that goes. The more powerful the state of tune and spec, the more powerful the exhaust sound tends to be. Should mention, for folks who have never hot rodded an engine, always design the induction and exhaust after deciding on engine spec and tune. Maybe the OP didn't do enough research for his intended goals prior to purchase? |
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#7 | ||
FF.Com.Au Hardcore
Join Date: Mar 2005
Posts: 5,250
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What sort of exhaust system/extractors are fitted to the G6ET?
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#8 | ||
Moderator
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Location: Melbourne
Posts: 7,940
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#9 | ||
Donating Member
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It's alright, you relayed that someone said it sounds like crap and that you think it doesn't sound tough as the older skylines.
In which way? Can you describe specifics? Also answering CBs question can help others understand what you would like to improve. |
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#10 | ||
FF.Com.Au Hardcore
Join Date: Oct 2007
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#11 | ||
Regular Member
Join Date: Apr 2016
Posts: 44
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Yes sound is very subjective. 20 odd years ago i had a XW with a 221? ci 6 running twin pipes with a balance line(3 into 1) and I thought it sounded tough as nails for a 6. It was all blow and not much go but it sounded the part in my opinion.
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#12 | ||
Donating Member
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Posts: 11,429
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Without modifying the exhaust system, I'm not sure how much benefit locking out the VCT phasers will help you.
You can close up the LSA, which actually can help with turbo in some situations but at some point the turbo will lose efficiency and the close LSA will hurt your power. Probably destroy fuel usage too, I am not sure how any rumble from the added overlap will come through the stock exhaust. Edited: sone = some and situation = situations Last edited by solarite_guy; 03-04-2018 at 01:20 PM. |
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#13 | ||
FF.Com.Au Hardcore
Join Date: Aug 2009
Posts: 2,256
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![]() "Could I just run standard cam timing on my G6ET if I preferred sound over substance and was not chasing performance and/or economy?" |
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#14 | |||
FF.Com.Au Hardcore
Join Date: Oct 2008
Location: Victoria
Posts: 7,854
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Quote:
In comparison your G6ET is a much larger 4L running a standard exhaust?
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______________________________ 2015 Territory Titanium RWD Diesel - SOLD 2016 BMW X5 xdrive 30D Msport Seadoo Challenger 210SE 310HP |
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#15 | ||
Donating Member
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I realize this isn't a Ford in the article, however, the article discusses closing up the LSA via computer control and shows benefits in certain conditions. Locking the LSA in a closely separated condition could get old very soon with the turbo.
http://www.enginelabs.com/news/spool...ing-for-boost/ |
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#17 | ||
FF.Com.Au Hardcore
Join Date: Oct 2008
Location: Victoria
Posts: 7,854
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Indeed, the standard Exhaust on the skylines of that era is pretty subdued, very rare to find a standard one now - even back then.
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______________________________ 2015 Territory Titanium RWD Diesel - SOLD 2016 BMW X5 xdrive 30D Msport Seadoo Challenger 210SE 310HP |
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#18 | ||
FF.Com.Au Hardcore
Join Date: Feb 2008
Location: WA
Posts: 3,705
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Go see ratter.
He is doing ghost cams for the 6. Even better, chuck a clevo in.
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#19 | ||
Regular Member
Join Date: Apr 2016
Posts: 44
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Excuse my ignorance but what is the idea/logic around a ghost cam for the inline 6?
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#20 | |||
FF.Com.Au Hardcore
Join Date: Feb 2008
Location: WA
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Quote:
__________________
www.bseries.com.au/mercurybullet 2016 Falcon XR8. Powered by the legend that is - David Winter. XC Cobra #181. 1985 Mack Superliner, CAT 3408, 24 speed Allison. |
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#21 | ||
FF.Com.Au Hardcore
Join Date: Dec 2014
Location: St Marys Tasmania
Posts: 3,556
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Big fan of our Barra . She's a beaut . Who's the sound police anyway . It's all subjective . Opinions on how a car sounds are like bums , everybody's got one including me . Last year about this time we had a bunch of new Ferrari's in the area at Targa Tasmania time . I had a good listen to these turbo charged V8 's as most were and they didn't impress me but they are superb engines and are famous for how they go..Still couldn't get especially excited about the sounds though . The next bloke would have a totally different feeling on them absolutely no doubt . .. .
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#22 | |||
Donating Member
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Quote:
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#23 | ||
Peter Car
Join Date: Dec 2004
Location: geelong
Posts: 23,145
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I think you will find the VCT on the turbo variants to be non active. The whole factory vct tuning tables are all zero's.
So the original theory that it sounds crap because of vct is just ridiculous. I'm surprised this wasn't posted on April 1st. |
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#24 | ||
Donating Member
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Then what would the lobe separation angle be under operation?
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#25 | ||
Regular Member
Join Date: Apr 2016
Posts: 44
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I guess I was remembering the old school late 80's early 90's Nissans with single turbo's and non vct?. A mate had an older RB26 with a adustable wastegate boost control valve? vented off inside the cabin and it sounded pretty tough to me as a then 20 year old. Another had a RB30 powered Fairlady Z? with a massive exhaust 3-4"? that just sounded like pure evil at idle/low rpm with low speed turbo whistle.
I would hate to own something like that as a daily driver but when I do retire the G6ET to weekend joyrides etc I wouldn't mind an exhaust note that scares the local wildlife. |
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#26 | |||
Donating Member
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Quote:
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#27 | |||
Peter Car
Join Date: Dec 2004
Location: geelong
Posts: 23,145
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Quote:
With the new sct software giving access to the vct tables it can be activated now by the sound of it though. |
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#28 | |||
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Quote:
When I first read the article I posted earlier on page 1, I actually laughed that some only now realize what the old time hot rodders have known and put into play since putting down their WWII air craft tools and starting up the post war aftermarket industry. Even still, it seems many are shunning it because it's strange and new in their world. If limits remain in place for vct, etc, options for example, like Haltech still exist. One of the next steps in this area is to re-engineer the phasers so the blind concept of lockouts and limiters can go the way of the Edsel. Folks are still thinking "in 1 dimension" when it comes to valve timing. |
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#29 | ||
2009 xr turbo,2004 fiesta
Join Date: Oct 2017
Location: Perth wa
Posts: 659
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I had a twin 2.5 venom system on my stock g6et and it sounded better than stock,not too much louder at idle but once opened up it sounded a lot crisper.
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#30 | ||
VFII SS UTE
Join Date: Apr 2007
Location: Central Coast
Posts: 6,353
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the only good sounding 6 that I heard, 245 hemi..
under gentle throttle sounded great, nice bark..
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