I have not seen smooth idle turbo camshafts discussed much, anyways I want to do a 1000 hp build with a smooth-ish idle, I prefer a little to no chop. I’m starting out with a GEN 4 6.0 W/a 6L90 Transmission. I want to put a decent turbo on it no Chinese parts in this build. I would like to stay on the budget friendly side of things, but I understand you get what you pay for. The car will be street driven as much as possible and dragstrip may be a couple times a year not a priority. I appreciate any advice you guys might have.

 

If you watch Richard Holdener much at all, you know he says, "any cam is a turbo cam". And he's right. Get a cam with the idle characteristics you like, and run it.
Then run up the boost as you like. This is all oversimplification, but how it is in a nutshell.
A smooth NA cam is no different than one used with a turbo. You cam for the power curve and idle characteristics you want. Boost just raises the curves to the level the boost takes it.

 

summit ghost cam would be great for what you want.

 

With a turbo your cam doesn't need or want much overlap, and overlap is what leads to idle chop. Look for a cam with a wide lobe separation angle (LSA). That shouldn't be difficult to find since with a turbo, you don't need a big intake lobe since you have a blower forcing air into the motor. The exhaust lobe might need to be big to clear out the burnt gases from a 1000 HP burn. An earlier exhaust opening helps to spool up a turbo.

 

We used an LG Motorsports Executive cam (sleeper cam) with basically stock sounding idle in a 376ci LS running Precision GTS76 turbo. On 14psi it made 1060rwhp and drives like a kitten until you make boost. On 22psi this thing rips in a 2900lb RX-7.
You can see the power falling off after peaking which we found out on the dyno was from not enough wastegate spring. We would command 14psi and then after hitting it ..... boost would fall off. We solved that and she's a beast.

 

In order to recommend a cam that could be smooth but also help you reach your goals, it'd be helpful to know:

• Compression ratio
• Max boost
• Max rpm
• Fuel type
• Heads (and flow values)
• Throttle body size,
• Intake manifold
• Exhaust size
• 1000 wheel or crank hp?

 

T hanks for all the replies
currently I’m dealing with the following however I can change it up due to recommendations I receive. I have a budget to change some things.

COMPRESSION 9.6 to 1 823 heads
1000 at the crank is fine
max boost due to injector size will be 23 lbs
Max RPM is going to be whatever it takes lol however the wide LSA cam might not like 6700
Gas fuel however I have E85 capeabilities ( L96 engine)
Have the stock TBBS INTAKE and a sheet metal mid length
Tubular headers single BB Precesion turbo
I really want good low RPM driveability. I’ve had built other brand engines with choppy cams and I didn’t enjoy driving them around town.

 

You'll need meth injection, E85 or Race Fuel to run 23psi.

The Cammotion LS Turbo Dual Pattern 224/228 115+5 .604/.587 would be streetable with a mild torque converter and could be tuned for mild idle. Probably need about 15-17psi to make your goal.

 

Call Cam Motion or BTR and get a custom cam.

 

Thanks for the suggestions, I’m keeping the e85 for that purpose and I realize that it will be difficult to to make 1k and have a stock idle.
Does anyone think the Hawk cheater cam can get it done?

 

It will, but will require a little more boost compared to the Cammotion in order to do so. If you wanted a little less overlap, Cammotion has a 220/224 115+5 (-8). If you wanted to match the Cheatr overlap, you can have Cammotion grind it on a 220/224 116.5+4.

What's the weight of the vehicle this is going into?