Ls3 mods cam only

[vxr2010]

Any advise please , i have an ls3 , vcm done and cat back has been modded , noise level is about where I want it , I was thinking of a remap and mf magic cam , but not doing cats or headers due to increased cost , is it worth doing it or do cats and headers need to be done to make it worth while , any suggestions and any idea as to power increase and how noticeable it is , cheers in advance

[r8black]

Recently had the monkfish cam fitted and yes you will notice a big improvement
With it. Fully recommend this and your quite welcome to test drive mine Before
You make a purchase and I'm sure you'd be extremely happy with the result

[ARAF]

vxr2010 said:

Any advise please , i have an ls3 , vcm done and cat back has been modded , noise level is about where I want it , I was thinking of a remap and mf magic cam , but not doing cats or headers due to increased cost , is it worth doing it or do cats and headers need to be done to make it worth while , any suggestions and any idea as to power increase and how noticeable it is , cheers in advance

I agree with your thinking, and I would think there will be a noticeable increase - in mid range urgency, rather than outright power.

You need to remember that flow rates only come into play at WOT and high revs, and you're hardly ever doing that on the road. I know that Mf are the retailer, so have a declared interest, but they will be able to tell you what modifications were made to their blue Maloo, and have dyno graphs from the various meetings at SRR.

[SturdyHSV]

ARAF said:

WOT and high revs, and you're hardly ever doing that on the road

bloody old timers!

Or maybe it's just my old ox-cart doesn't have enough power?

[Tattooboy]

SturdyHSV said:

ARAF said:

WOT and high revs, and you're hardly ever doing that on the road

bloody old timers!

Or maybe it's just my old ox-cart doesn't have enough power?

Perhaps if you cleaned all the crap off, you'd gain a few more MPH's !!

[SturdyHSV]

Tattooboy said:

Perhaps if you cleaned all the crap off, you'd gain a few more MPH's !!

Too risky, what if I lost traction?

[jonnM]

If "noise level is about where I want it" then don't fit headers, they are obscenely loud on the LS3
But I would have thought you'd need to fit them to get the most out of the cam?

[EmmaJ]

SturdyHSV said:

Tattooboy said:

Perhaps if you cleaned all the crap off, you'd gain a few more MPH's !!

Too risky, what if I lost traction?

I leave my TC on so clearly any slip that the TC allows must be ok

[SturdyHSV]

EmmaJ said:

I leave my TC on so clearly any slip that the TC allows must be ok

I find (found) the TC to be worse than letting it slip, it's all snatchy and nasty with TC on as as soon as you start to correct it it cuts all the power. I say that, I have had it turned off for 3 years, so I can't really comment reliably any more on what it's like

[vxr2010]

Is the thought that it wound still work very well with out headers and sports cat or not worth doing unless I do headers and cats

[jameshsv]

vxr2010 said:

Is the thought that it wound still work very well with out headers and sports cat or not worth doing unless I do headers and cats

N/A you need all restrictions removed for the full benefit of a cam.Take R8black offer of a drive you will be surprised how well it goes.

[007 VXR]

Noticed a big inprovment in mine when i had a MF Cam fitted

[r8black]

And of course obviously the cam appears to work better with black cars for some unknown reason

[ARAF]

jameshsv said:

vxr2010 said:

Is the thought that it wound still work very well with out headers and sports cat or not worth doing unless I do headers and cats

N/A you need all restrictions removed for the full benefit of a cam.Take R8black offer of a drive you will be surprised how well it goes.

Only at the top end!

[EmmaJ]

SturdyHSV said:

I find (found) the TC to be worse than letting it slip, it's all snatchy and nasty with TC on as as soon as you start to correct it it cuts all the power. I say that, I have had it turned off for 3 years, so I can't really comment reliably any more on what it's like

I was joking

In the wet mine can easily overwhelm the TC in all gears up to 4th

Yeah TC is more likely to kill you than save you with the instant power cut

[djwilk]

jonnM said:

If "noise level is about where I want it" then don't fit headers, they are obscenely loud on the LS3
But I would have thought you'd need to fit them to get the most out of the cam?

This is what I thought before I fitted my Proflows to the existing decat WP Supercar. It doesn't sound louder. Just different. Throatier. Perfect in my opinion.

[jameshsv]

ARAF said:

Only at the top end!

Any End

[jonnM]

djwilk said:

jonnM said:

If "noise level is about where I want it" then don't fit headers, they are obscenely loud on the LS3
But I would have thought you'd need to fit them to get the most out of the cam?

This is what I thought before I fitted my Proflows to the existing decat WP Supercar. It doesn't sound louder. Just different. Throatier. Perfect in my opinion.

I like to hear your car one day as I've got the WP Supercar cat-back as well ( but Wortec headers).

[ringram]

ARAF said:

You need to remember that flow rates only come into play at WOT and high revs, and you're hardly ever doing that on the road.

Incorrect Sir.

Flow occurs all the time at all throttle positions. Why would it not?
A cam most definitely affects flow through the engine even at part throttle.

[ARAF]

ringram said:

ARAF said:

You need to remember that flow rates only come into play at WOT and high revs, and you're hardly ever doing that on the road.

Incorrect Sir.

Flow occurs all the time at all throttle positions. Why would it not?
A cam most definitely affects flow through the engine even at part throttle.

I don't think I was saying that flow doesn't happen - just that restrictions won't be a problem until you reach the maximum flow rate of each component, and unless you have seriously mismatched components that doesn't happen until the engine is spinning hard and the throttle butterfly is wide open (otherwise the restriction is the throttle body and intentional).

I've yet to find any meaningful figures for the flow rates of hot exhaust gasses in the exhaust headers and systems that can be compared with the figures for unburnt mixture in the inlet tract. I know you always say that big is beautiful, but it would be good to have a bit of science to back that up.

A gas when hot will move faster than when it is cold, but it will also be less dense. Is this relationship linear? Will the same mass be able to move through a given pipe diameter, whatever the temperature?