[KingLT1]

Originally Posted by DFW1LE

These results are terrific! Couple of questions, is the Stage 1+ cam an updated version from the original stage 1 cam or is it literally something in-between your stage 1 and stage 2 cams? When adding an ATI U/D is it necessary to retune ones car?

balancer swap shouldn't require any tuning....just reduces parasitic drag on the engine thus freeing up a few ponies.

[PRAY]

Originally Posted by DFW1LE

These results are terrific! Couple of questions, is the Stage 1+ cam an updated version from the original stage 1 cam or is it literally something in-between your stage 1 and stage 2 cams? When adding an ATI U/D is it necessary to retune ones car?

This cam was an adjustment keeping the customers requests in mind. It ended up being a 225/23x 112+x. It had to make power with impeccable street manners. We weren't trying to set the world on fire. I had to balance the can with the converter with the goal of 10.5@130 in good weather.

No tuning changes are needed for the UDP.

I honestly don't think I have duplicated a cam yet. They have all been customs.

[DFW1LE]

Thanks guys, been thinking about adding the ATI. A few extra HP would be nice, but mainly it may provide some extra protection for the engine.

[Balzdeep]

Originally Posted by PRAY

I would have to add it up. This particular build came in with headers, RF, and a coue other things.

4-5 grand?

[ULTRAZLS1]

Does anyone know how big of a cam can be safely run before you need to fly cut?

I’ve never done it. Don’t have the tools. Etc. I’ll probably go with the biggest cam I can fit without a fly cut

[danhr]

Originally Posted by ULTRAZLS1

Does anyone know how big of a cam can be safely run before you need to fly cut?

I’ve never done it. Don’t have the tools. Etc. I’ll probably go with the biggest cam I can fit without a fly cut

not trying to hijack the thread, but TSP's VVT3 cam does not require flycutting, IIRC.

If I remember TSP's stance on it correctly, because these kinds of scenarios come up with ls3 vehicles as well, TSP doesn't want to sell camshafts that require flycutting, because they do not believe that the average owner does not want to flycut their pistons, so they cater their products towards that.

[PRAY]

Originally Posted by ULTRAZLS1

Does anyone know how big of a cam can be safely run before you need to fly cut?

I’ve never done it. Don’t have the tools. Etc. I’ll probably go with the biggest cam I can fit without a fly cut

Why yes, yes I do.

It isn't a specific number like 223 or what not. It seems to be an IVO of about 6* BTDC will clear with a .006" clean up mill on the stock gasket. How you get there is on you.

Now there is some wonky stuff going on with this cam phaser. I have seen some peoples cams have a 9* or higher IVO. If you check PTV with the phaser locked out you won't have clearance past 6* IVO. But I have heard the phaser retards 4* or so upon start up and that becomes the new 0. I can't confirm or deny this. I just don't know how the phaser would be able to retard at all with a 0* phaser limiter in it. Some people say you can pressurize the phaser and check PTV that way. I will say that I pushed it pretty darn far with my NBK cam trying to maximize DCR. I figured I may run into issues. But I spun it to 7,300 or so at the Fest with no issues.

Hopefully someone smarter than me has a better answer.

[PRAY]

Originally Posted by danhr

not trying to hijack the thread, but TSP's VVT3 cam does not require flycutting, IIRC.

If I remember TSP's stance on it correctly, because these kinds of scenarios come up with ls3 vehicles as well, TSP doesn't want to sell camshafts that require flycutting, because they do not believe that the average owner does not want to flycut their pistons, so they cater their products towards that.

The VVT-3 is 235/239 116+4. Puts you back and IVO of 6* BTDC as I mentioned above. People get hung up on advertised cam specs. They are only a representation of valve event. The events are what matter as you know.

[danhr]

You lost me at phaser.

I stopped thinking engines and started thinking star wars.

on a serious note: Would it be a safe assumption that the added PTV clearance with the thicker factory gasket is more beneficial than running the thinner cometic head gasket with less ptv but more compression?

[ULTRAZLS1]

Originally Posted by danhr

You lost me at phaser.

I stopped thinking engines and started thinking star wars.

on a serious note: Would it be a safe assumption that the added PTV clearance with the thicker factory gasket is more beneficial than running the thinner cometic head gasket with less ptv but more compression?

I was wondering that too...cuz ive run the cometics in all my builds in the past

Compression bump vs slightly more aggressive cam

[PRAY]

If you keep the cam smaller you can run a Cometic and still make a ton of power. Ask me how I know. LOL.

[KingLT1]

So it sounds like the PTV is a bit tighter on the LT1 vs a LS3?

[PRAY]

Originally Posted by KingLT1

So it sounds like the PTV is a bit tighter on the LT1 vs a LS3?

I wouldn't say that. I think they come out about the same.

[danhr]

Originally Posted by PRAY

If you keep the cam smaller you can run a Cometic and still make a ton of power. Ask me how I know. LOL.

So the million question, is what are we looking at for a max effort, no flycut, bump up compression by thinner head gaskets and maybe milling heads cam?