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Old 10-06-2013, 09:07 PM   #1
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Turbo cam question

What would be the best cam for a daily driver twin turbo setup. The motor is stock for now and i want to make some good power without beating my valve train. I know there is a lot to look at and the question is very vague. But I would like some more info that people have firsthand experience.
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Old 10-06-2013, 09:10 PM   #2
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Single turbo here, same question.
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Old 10-06-2013, 10:38 PM   #3
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I am very happy with the LS9 cam in my car.
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Old 10-06-2013, 10:44 PM   #4
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The LPE GT9 is the best off the shelf cam for turbos in my opinion, a custom cam is a better option though.
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Old 10-06-2013, 10:47 PM   #5
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How is the Letal Racing Night Fury cam with turbo?
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Old 10-06-2013, 10:57 PM   #6
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Also, who is the best for a custom turbo cam?
What cams are the winning cars running?
Who has their name on a wild turbo car kicking ass out there?
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Old 10-06-2013, 11:19 PM   #7
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Also, who is the best for a custom turbo cam?
What cams are the winning cars running?
Who has their name on a wild turbo car kicking ass out there?
+1



Also what are the specs on the custom grinds
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Old 10-06-2013, 11:45 PM   #8
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The specs on a custom grind cam will be (should be) tailored to YOUR COMBO (which consists of engine size, heads, desired max rpm, type of trans, rear gearing, how much boost you want to run, type of intake, compression ratio, etc etc etc).

For example, my custom centri cam was 610/575 235/260@050, 115+6LSA. My custom turbo cam is slightly bigger than that. I would say the specs but I don't know if CPR wants them out... I love the sound of a big cam and have no issues with a little bucking at low rpm. The centri cam bucked just a small bit and idled at 900rpm. I knew this and gave it a little extra gas when idling through a parking lot under power. I will do the same for the turbo cam.

Who is best is subjective. Common names are Brian Tooley, Pat Guerra, Ed Curtis, Martin at Tick performance. There are many other too.

Pyro, ask yourself how much power do you want at the wheels? The stock LS3 cam will make over 600rwhp. When it comes time to forge the engine, get a custom cam at that time. Save the money now for forging later. Don't waste money on a cam right now if you know you are changing your combo later.

A cam should be the last piece of the puzzle you figure out as it ties the build together.

I am sure the night fury cam will work. It works extremely well for centri applications. Think of this though - most cams such as the night fury, JRE, G6X3 cams are all around $400. A custom cam is also $400. It just takes a couple more days to get it shipped to you because it has to be ground. Talk to your builder and if a cam that is already established has the specs you need, go for it. Otherwise, custom.
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Old 10-06-2013, 11:53 PM   #9
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Starting to wonder why change cam at all in a stock LS3 if you've gone TT. You can max out the motor using stock cam, so why even bother. Get a custom grind in your built motor for sure, but it may be a waste of time in a stock LS3.
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Old 10-07-2013, 12:35 AM   #10
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Very true, 650whp is reaching the stopping point for the LS3 anyways.
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Old 10-07-2013, 08:02 AM   #11
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Ive heard mixed reviews about the JRE blower cam being turbo friendly. Anyone have experience with that? Do most centri cams work similarly to turbo cams?
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Old 10-07-2013, 09:36 AM   #12
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Thanks for all the input. I just wanted power with pushing less boost to my motor. I know there is a lot that comes into play about the cam being tailored to the size of your turbos, how much boost, the internals, hp goals, and a lot more.
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Old 10-07-2013, 10:31 AM   #13
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Boost will not blow your motor up, cylinder pressure (dynamic compression) will. And whether you have 600hp on 15psi or 600hp on 5psi the motor is under the same stress.
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Old 10-07-2013, 01:41 PM   #14
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Boost will not blow your motor up, cylinder pressure (dynamic compression) will. And whether you have 600hp on 15psi or 600hp on 5psi the motor is under the same stress.
I disagree. We have to assume more boost means more heat in the charge.
I think you are better making more power with less boost. At the end of the day, a more efficient combo will make less heat.
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Old 10-07-2013, 02:26 PM   #15
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Will heat increase pressure, yes. Does boost equal heat? Not necessarily. I wouldn't be worried about how much boost it takes to make x amount of horsepower, because the cylinder pressure will be the same nonetheless.
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Old 10-09-2013, 07:08 PM   #16
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Will heat increase pressure, yes. Does boost equal heat? Not necessarily. I wouldn't be worried about how much boost it takes to make x amount of horsepower, because the cylinder pressure will be the same nonetheless.
No, but more boost will lead to a higher chances of knock before MBT is reached.

Any combo that can achieve xyz power level using a lower boost pressure is ALWAYS the safer and more reliable setup.

The only thing that often prevents using compressors large enough to achieve it, is spool. So it's always a compromise.
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Old 10-09-2013, 07:27 PM   #17
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Any combo that can achieve xyz power level using a lower boost pressure is ALWAYS the safer and more reliable setup.
Definitely not...
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Old 10-09-2013, 08:56 PM   #18
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Definitely not...
Ok. You are saying that power is the ultimate limiter on stress concerning the cylinder walls, crank, rods. Ok. I'll buy it. Now, let's talk about pre-ignition, hot spots,etc. you show me how you compress air without heating it up as you increase pressure...
I'm not understanding how you figure it isn't best to have a more efficient air pump before adding boost?
The less you heat the charge, the less chance of chaos. There is no free lunch on a restricted platform like this. Huge intercoolers block more radiator flow, and pre-heat it. Now the coolant runs hotter, as do the jackets, and cylinders,etc.
Never mind the added load of having to soak up more heat because of the extra power.
That's all we are saying. Why run 15lbs of boost and the headaches it creates, when you could improve your air pump to only need 8psi to reach your power goals?
I've dealt with a ton of turbo builds, and I know more boost always looks cheaper and easier, but never is!
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Old 10-09-2013, 09:13 PM   #19
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Improving the method of Forced Induction I can agree with, but a motor with a larger camshaft using 8psi versus a stock engine using 12 psi the difference is negligible.
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Old 10-10-2013, 04:28 AM   #20
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Definitely not...
Definitely yes.
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