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XP/VS/S1X cam's

JDrach

JDrach

New member
So I know I've been tossing up which cam to get the past couple weeks. I'm just trying to find which one would be the best for my situation and driving style. I never ran a 1/4th, and really don't plan on it regularly. Want I want from my car is to keep it like a daily driver that it is, but with some kick. My driving consists of town/city driving. These roads range from 25-50 MPH, so I never really exceed 60mph often. At that, I never really go through more than one gear when going WOT, unless its just a test run on an empty road or something. This is where I'm in a debate

I don't think I'd really need an XP cam for the higher end power for I never really am in that range I don't believe. This leads me to the S1X and the VS. I know some people with the VS and say how its a powerful low end cam that provides the instant increase in power. Also its safe on the valvetrain, and making this car last while modding it is my goal. That's what leads me to VS cam, but others say the S1X is more powerful than the VS but I believe the VS is better suited for the less wear on the valvetrain and the power it can create. Any feedback on my needs would be greatly appreciated.
 


If you put a cam in and think it's valvetrain safe, you better google TommyGloves and learn that stock springs break and have broken on many peoples "valvetrain safe" setups.

Just saying..there's locals I'll ask to drive over and smack you if you don't do springs and retainers.
 
I always thought S1X was low-mid range. I didn't look at the specs if it. I really haven't heard to much about that one in all honesty. And I was going to buy modded retainers, 105 crows, new timing chain and dampener with the VS. I wasn't going to install the cam without any of that.
 
VS is probably what you want. Outside of the performance increases its almost like not having a cam at all, and it is pretty light on the valvetrain. on my old car I probably put 20k miles on a VS with stock valve train with no issues before I decided to upgrade springs. I don't reccomend that but just saying.
 


If you're already upgrading the springs/retainers and you're replacing the timing chain...I don't see why you aren't going with the S1X over the VS since you are still running stock heads.

Like I've said a million times, that's what I'd choose.

I DD'd an XP through all weather conditions for over 40k before the Thrasher setup was built...ran on LS6 springs, stock chain/dampner.

It ran just fine, never had any idle or driveability issues...ran knock free on pumpjunk 91 on a 3.2" with headers/tune/ported blower/LS1 TB, and whatever other odds and ends.
 
As said, the XP and S1X will be very similar.

I would go with a VS cam with 105# springs, or a PRJ LL cam with 110# springs.

VS will have the best manners though.

And, don't stick in a cam without putting on heavier springs.
 


L76 springs are fine for rockers but I wouldn't test them on a cam.

I don't know why people cheap out when it comes to the valvetrain...Crow 105's or Manley 130's would run great with some Modded or Titanium retainers...with any of those cam choices.

Also, lighter valvetrain = rev happy motor...I loved how quick my car revved.
 
blueguy91 said:
L76 springs are fine for rockers but I wouldn't test them on a cam.

I don't know why people cheap out when it comes to the valvetrain...Crow 105's or Manley 130's would run great with some Modded or Titanium retainers...with any of those cam choices.

Also, lighter valvetrain = rev happy motor...I loved how quick my car revved.
Click to expand...

no.

the S1X is "bigger' than an xp as well.

Do springs with any cam you do. The VS is a handy drop in no tune cam that doesnt break the narrowband.
 
S1X: Duration @ .050": 210/221, lobe lifts: .321"/.329", valve lifts with 1.60:1 rocker arms: .514"/.526", lobe separation angle: 115, intake centerline: 111

•212°/224° at .050"
•Intake Lift .325" (.520" lift at 1.6:1 rocker ratio)
•Exhaust Lift .335" (.536" lift at 1.6:1 rocker ratio)
•116 Lobe Separation

So no, the S1X isn't larger than the XP on paper.

Guy.

And your quotes around the bigger part is just another Scott answer where you'll defend it with magic, correct?
 
Spring bind on L76 springs is .520-.530, depending on the source. A VS cam with 1.6 ratio is .512 lift. But, with stock rockers, I would assume the ratio is closer to 1.7. Which would give .544 lift. Not really safe, even though it's been done.

Also, I'd like to ad that I used to run LS6 springs with titanium retainers on my XP cammed car. I switched to steel retainers and 130# springs and picked up a decent amount of power. Don't be afraid of the spring. It won't hurt you.
 


So the VS doesn't gain any noticeable power? I just want more power of course, but was thinking the low-mod range VS cam that I've been hearing would be best since I do alot of driving around town. I don't see the xp being beneficial since I do alot of around town driving and that's for higher end power. Regardless I was getting new chain, dampened, 105 crows and modded retainers for the VS. just trying to find which would be best for my style of driving and the roads I'm on. Never have I raced or punched it through and entire gear on the expressway or something or at the track. I just want something good for daily driving on the streets, so Vs sounds best for the low gear and rpm power....
 
Cam cards? I know the powerbands for the XP is better power throughout the higher rpm ranges of the gears. I understand the concept of them, forgot to use that term though.
 
So which cam would be best for my situation? XP will just help keeping me from slowing down top end correct? and VS just helps me with that more torque/hp when i punch it? Where does the S1X stand?
 
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