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Author Topic: v6 cams  (Read 2937 times)

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sassanach

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v6 cams
« on: 25 August 2013, 22:01:19 »

if you inadvertently swapped the inlet and exhaust cams on a 3.0 v6,would it run?the reason I ask is basically my my 3.0 elite seems a tad sluggish and im struggling to find anything wrong with it.
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VXL V6

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Re: v6 cams
« Reply #1 on: 26 August 2013, 01:02:16 »

http://www.omegaowners.com/forum/index.php?topic=90500.0

Well it would definitely make a difference as the inlet is a G Cam and the exhaust is an A cam on a 3.0.

On a 2.5 or a 2.6 the Inlet is also an A cam and it's known that putting G cams in place of them can gain 15 - 20 BHP (VX did this on the 2.6 Vectra B GSi's) so I guess the valve open duration must be longer.

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Darth Loo-knee

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Re: v6 cams
« Reply #2 on: 26 August 2013, 08:53:47 »

I came across a V6 where someone had got an inlet cam and a exhaust cam the wrong way around, it ran but a little lumpy... hope that helps
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Marks DTM Calib

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Re: v6 cams
« Reply #3 on: 26 August 2013, 11:57:23 »

It will run but not at its optimum.
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sassanach

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Re: v6 cams
« Reply #4 on: 26 August 2013, 18:01:47 »

It will run but not at its optimum.
it runs smoothly enough,it just seems to have lost its sparkle,its mpg is down a shade too,im convinced it was a lot quicker before I ran out oif talent a few months ago.only two things have changed,i did the head gaskets because I cooked it ,and I put a new exhaust on.
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Nick W

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Re: v6 cams
« Reply #5 on: 26 August 2013, 19:31:00 »

 I was impressed with mine when I got it, but the cambelt change improved it considerably. Correcting the cam timing as it was a tooth out on all four cams made it run smoother, stronger and more economically.
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Darth Loo-knee

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Re: v6 cams
« Reply #6 on: 26 August 2013, 21:49:10 »

Are the multi rams both working? If not some of the sparkle can go plus, mpg will suffer :y
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2woody

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Re: v6 cams
« Reply #7 on: 26 August 2013, 23:32:19 »

On a 2.5 or a 2.6 the Inlet is also an A cam and it's known that putting G cams in place of them can gain 15 - 20 BHP (VX did this on the 2.6 Vectra B GSi's) so I guess the valve open duration must be longer.

Vx did this on the Vectra GSi, yes, but that was with a management system to suit.

its doubtful if this is going to yield many extra ponies on an Omega. I dyno'd a 2.6 once with 3.0 cams and this lost HP.
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pauls

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Re: v6 cams
« Reply #8 on: 26 August 2013, 23:59:30 »

I have 3ltr cams in my 2.6 it shows at the top end of rev range. Dont know about hp though
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2woody

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Re: v6 cams
« Reply #9 on: 27 August 2013, 22:47:46 »

dyno plot at all ?
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chrisgixer

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Re: v6 cams
« Reply #10 on: 27 August 2013, 22:59:21 »

Are the multi rams both working? If not some of the sparkle can go plus, mpg will suffer :y

That was my first thought. But I'm sure Mr Nach would have checked that.
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sassanach

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Re: v6 cams
« Reply #11 on: 27 August 2013, 23:08:07 »

Are the multi rams both working? If not some of the sparkle can go plus, mpg will suffer :y

That was my first thought. But I'm sure Mr Nach would have checked that.
sure did,according to the guides there working perfectly
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Marks DTM Calib

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Re: v6 cams
« Reply #12 on: 28 August 2013, 12:10:32 »

On a 2.5 or a 2.6 the Inlet is also an A cam and it's known that putting G cams in place of them can gain 15 - 20 BHP (VX did this on the 2.6 Vectra B GSi's) so I guess the valve open duration must be longer.

Vx did this on the Vectra GSi, yes, but that was with a management system to suit.

its doubtful if this is going to yield many extra ponies on an Omega. I dyno'd a 2.6 once with 3.0 cams and this lost HP.

We observed the opposite with Mick Dundee's, when he replaced the goosed exhaust it improved further.
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symes

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Re: v6 cams
« Reply #13 on: 28 August 2013, 13:35:43 »

inlet cams are different profile---you going to have to put it right--am not guessing--fact----stripped enough of the v6s to know---it will run but not right--why do you think VX label them it aint for fun :y :y :y
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