Cam package/kit needed for L99 to LS3

[JANNETTYRACING]

Originally Posted by Jason 98 TA

The main reason shops sell VVT delete kits is they don't have experience with VVT to run it properly.

I respect what you are doing with VVT cams.

But your Statement is misleading and untrue, I have been working with VVT cams for more than 6 years.

The reason we eliminate VVT is because VVT limits you on how big of a cam you can run because as the cam gets bigger you have to limit how much the VVT system can advance or retard the cam to avoid Piston to valve Crashes.

The other reason is, if you want to rev the engine higher you have to run heavier valve springs, Heavier valve springs put more load on the VVT system and in most cases the VVT system can't deal with heavy valve springs for long.

We have Seen what a failed VVT system does to Valves and pistons.

I will Not dispute the advantages of VVT for making power with Small Cams but most guys don't want small cams they want big cams that lope and sound cool.

Ted.

[Jason 98 TA]

I understand your concerns with the Vvt based off fords vvt issues, but the gm system is different. We've run large camshaft very well with vvt. Case in point my personal 475rwhp a6 heads cam l99 car.

You give me any camshaft you can design & I'll give you the vvt equivalent that will out power it at almost every rpm point.

But what do I know I only have 300 dyno pulls on a l99 on my engine dyno. One day we will all look back to these times and wonder how the crap some people thought vvt wasn't a huge step forward.

[Jason 98 TA]

We have vvt camshafts in the 230s duration that has made over 100 hp gains on my engine dyno.

[JANNETTYRACING]

My only concern was your quote.

I applaud what you guys are doing with Cams and testing.

Ted.

[Jason 98 TA]

Ted I am just wanting people to study what makes vvt so special. The ability to move the camshaft throughout the rpm band is a amazing feature.

Also pv contact Is not a issue because the camshaft limiters prevent the camshaft from moving into p/v interference range.

[mlee]

I'm picking up some new L92 Scoggin heads tomorrow and will definitely be doing a VVT delete... Time to go Cam shopping now...

[hot ss]

someone make a vvt blower cam with heavy lope, please?

[Jason 98 TA]

Have you not heard the VVT-3 we posted video clips & dyno data from? The camshaft made 100 flywheel horsepower gains & chops just like any LS3 camshaft would chop.

Just because it's a VVT camshaft doesn't mean it doesn't chop, I dont know who started that rumor, but it's ridiculous!

My current L99 automatic car makes 475 rear wheel horsepower with the VVT-3 camshaft & PRC ported heads. I don't think you'll find another heads/cam L99 car making that.

[Jason 98 TA]

Here's a cam only automatic with the VVT-3 camshaft!

[Screaminz2002]

Jason/Ted how is the longevity of running a VVT cam over a traditional setup? Which would be more prone to failure as a daily driver?

[Andy@Livernois]

Originally Posted by Screaminz2002

Jason/Ted how is the longevity of running a VVT cam over a traditional setup? Which would be more prone to failure as a daily driver?

I dont think anyone can comment for certainty. Every shop has their own opinion on the VVT vs. Locked Timing. I personally am still not at the point that VVT can be recommended to keep by us. The GM system is actually very similar to the ford system. If you look at the basic design there are some very strong similarities between them. Of course there are differences as well, but more similarities than those differences.

I think the biggest question to ask is how is it going to hold up on a 25k mile car, 50k mile car, 100k? we all know oil pressure drops with wear/tear. Being the system is directly tied to oil pressure it absolutely can be a failure point. It also takes a very large volume of oil to run taking that oil flow away from other areas such as cam bearings.

We have noticed on numerous vehicles with vvt, afm, and vvt/afm combined that there seems to be a prevalent amount of cam bearing wear on these when compared to a traditional LS engine.

For these reasons, we delete afm and vvt. Our standpoint is keep the HP, we want proven, time tested durability. We know you can make more HP.

Another way to look at this. We run a minimum clearance of .100 PTV on any of our builds, even though running a bigger cam with less clearance might make more power. Plenty of people run cams at .050 and less PTV and have no issues, but we would never do so on any of our builds, even if it meant making slightly less HP, the peace of mind is well worth it to us.

[Buffnshine]

Originally Posted by Busy_Boi

I got my conversion kit here http://www.lingenfelter.com/mm5/merc...gory_Code=C379.

Hows it coming

[JANNETTYRACING]

Originally Posted by Screaminz2002

Jason/Ted how is the longevity of running a VVT cam over a traditional setup? Which would be more prone to failure as a daily driver?

Ditto What Andy Said, He is Right On Point!

[Busy_Boi]

Originally Posted by Buffnshine

Hows it coming

Start build next week sorry I am giving up on the vvt.