The cams aren't even controlled by the same ECU as the engine. VVEL has its very own "ECU" that gets a single can bus data line from the engine ECU, then makes the adjustments to the cam duration and lift based on that data. It makes things a bit more complicated that just some editing on the tuning program everyone is using.

Now for the real questions ... how many anniversaries does Shumby have ahead of him before his wife will finally let this go? :rofl2:

good luck on both accounts

^^^ lol


thanks for adding that info. Good to hear it from someone in the know.

Really??? Huh... I had no idea. Still learning...:ugh2:

The GTM kit is untunable?

where did you come up with that idea?

Man this really sucks, sure you'll still make a lot of power with stock cats and headers but everything comes down to the tune. If the tuning is limited it will have a snowball effect. I applaud you guys for being the pioneer and still making good #'s, if anything its a prequel on what the Z is really capable of. However I'm going to hold off on any intake mods other than drop in filters or power adders until VVEL is cracked. Unfortunately many tuners/manufacturers are pre occupied with making $ through basic bolt ons and INITIAL F.I. kits, looks like the one who remains patient may have a lot to gain.

:wtf:
Are you just writing random thoughts that come to your brain or are you logically thinking at all?

This is what I got from Uprev yesterday when I brought up VVEL again.

Their reply makes sense. I mean the VVEL allows for perfect and continuously variable cam timing all throughout the powerband so "cracking" it would be useless. If the LTH's are not allowing backpressure to be produced then I wouldn't really blame F.I or GTM for this issue. I'm willing to bet Stillen will run into the same issue if they attempt to tune their kit with LTH's and CBE pre-installed.

Maybe some catted LTH's would allow for some backpressure build up and thus retain pressure in the chamber? I guess someone will need to test this out and see if any gains are made versus stock headers and test pipes combo.

Great info theDreamer +1 rep.

So now we need to knock on some cam manufactures door.

Shumby your in good hands. I'm sure you'll have a big smile on your trip back home.

Edit: Don't for get the DIAMOND ring :tup:

If the GTM SC kit is having problems with a LTH with no cats and not building boost ......... is there going to be a problem with running stock headers and aftermarket HFC's and a larger diameter CBE? I do believe that Stillen and GTM have tested their SC kits on stock cats and a larger CBE and have shown good results. But I don't believe they have completed any tests with aftermarket HFC's.

This is going to be a interesting read on what the outcome is going to be for both GTM's and Stillen's SC kits. I hope that the final outcome isn't that we all have to have stock HFC's and stock headers to have a SC kit ..... that wouldn't be nice and in my mind it would prevent some serious gains with a free flowing exhaust and HFC's. Plus, with the extra fuel/air from the SC boosted intake flow, the stock cats would eventually burn out or worse; plug off from the extra exhaust gases. I basically don't have much faith or generally like the performance of a stock catalytic converter in a stock or forced induction situation.

GTM and Stillen have some serious testing to do answer those questions and I'm awaiting to see the results.

This forum is so on edge over these supercharger kits, it was meant to raise some blood pressures... ;) I know it isn't true.

Ill take an extra 150 whp on stock headers and cats all day long with a SC.

me too at this point. however i do not think HFC will be an issues but RCZ will be the test pig on that one

ah much happier today. woot