Custom Cams

429244

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Who is using them and why? Why didn't you just use off the shelf cams? Has anyone used Todd Warren NA SVT Camshafts for 3V cams?
Long story short, I have a friend who says that when I am ready, I should use custom cams from Todd NA SVT Camshafts who will spec the cam to my specific application. I did not think my forged rotating assembly but stock heads, 9.8 compression, and TVS blower made for an odd combo that requires custom cams. There is no cost difference for these custom cams.
If I need to get specific, I can but the point of this thread is to confirm how many of you are using or need custom cams, why, and who has experience with Todd NA SVT Camshafts.
Thanks
 
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drive_55_not

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Never heard of Todd Warren, but I did get a set up L&M custom cams for my build, Main reason was I wanted a more phaser friendly cam designed to use limiters.

Mike's profile picked up 25hp over the Comp 127300's I was using and they hold power out to 7800rpm. Limited I made 598rwhp on pump 93, I ended up locking them and dropped to 570.

I don't have the 7800 dyno sheet but this one is to 7300 ... Cams are locked ..

To keep it simple,, No you don't need a custom grind but if I had it to do over again,, I'd get a custom profile cut to be locked out and save youself the headache of tearing back into it when the phaser fails,, and they will ...

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250_ShotNitrous.jpg
 

Juice

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Basically, a custom grind is just that, tailored specifically to your combo and intended use.
 

Midlife Crises

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Is there a Phaser Friendly cam profile at almost 8,000 RPM ? I’m thinking phasers will be locked out with any cam in that RPM range.
 

JeremyH

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I switched from off the shelf comp cams to custom turbo cams for my combo and they were cheaper to boot. I picked up 60rwhp on 2 less lbs of boost. Even a car with similiar mods can benefit based on intended use of the car. Since they often dont cost more it's a no brainer to go custom.
 

Dino Dino Bambino

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Is there a Phaser Friendly cam profile at almost 8,000 RPM ? I’m thinking phasers will be locked out with any cam in that RPM range.

The stock phasers are known to fail with frequent bursts above 6500rpm so if your goal is a 7000+rpm engine. it's better to either lock them out or get the TFS 2v cam sprockets so that the cam timing remains fixed.
 

429244

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Thanks everyone. When I messaged to Mr. Warren, we talked about phaser friendly (not the term we used but it works). He said valve springs were more of a function of preserving the phasers. I get the fact that the cam profile dictates the spring but isn't it more accurate to say a heavier spring is harder on the phaser? He said the spring he sells is easier on the phaser. My goal does not involve going over 6500 rpm and to maintain street friendly driveability.
 

Dino Dino Bambino

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My goal does not involve going over 6500 rpm and to maintain street friendly driveability.

Then you could keep the stock valve springs and either retain the stock cams or go for NSR blower cams. This will also allow you to retain full cam phaser functionality.
The stock valve springs are known to be fine with boost levels up to 11psi. They may still also be fine at higher boost levels if rpm is limited to 6500. You could hedge against valve float by going to stiffer springs, but I don't see how they'd affect the phasers in any way.
 

429244

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Dino, When I started gathering parts for this build, I had no plans of changing cams. Then I started looking at the NSR required blower cams. I was reading some good reviews. However, I saw some reviews of spring required cams (without phaser mods) and thought why bother with NSR cams when for the same money I can get a good idle and more performance with the addition of springs. This is a sickness and trying to select the right cam does not help.
 

Midlife Crises

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The springs required for Comp Cams 127350 blower cams are only slightly stronger than stock and allow a little more lift clearance. :)
 

429244

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The springs required for Comp Cams 127350 blower cams are only slightly stronger than stock and allow a little more lift clearance. :)
Are you referring to the Comp 26113-24 springs? Only slightly stronger but they should still be good for 15 psi of boost and 6500 rpm, correct?
 

Midlife Crises

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Yes, I hit them with 16 PSI and try to shift at 6,500. I also have full operating VCT.
 

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