Jimbo1367

thanks !

cam

iTrader: (9)

I've read that too and posted about it as well. However I scour many boards keeping my eyes peeled for proof of phaser failures but I havent stumbled across one yet. That said I havent seen too many builds where anyones running big cams, dual springs and VVT yet either

pillagenburn

iTrader: (2)

I don't see how it would be physically possible for the cam phaser to fail under any circumstances short of it simply being defective. The phaser isn't doing anything, physically, to the cam itself - it is simply operating as a valve to allow pressurized oil into the body of the cam to do its thing... GM is using basically the same VVT system as Toyota... and their system has been subjected to all kinds of high spring pressures and all manner of other stresses. Until we see an actual failure directly attributed to stiff springs, I'll call this one a myth.

cam

iTrader: (9)

Time will tell. I just prefer to err on the side of caution myself

kballs

iTrader: (1)

I knew if I waited, the right people would pull through on this topic. A year ago, I bought a nice L92 donor for my 71 chevelle and asked around about VVT programming and cams. The most common answer was 'just throw all that stuff out and run ls3 parts in it'

I've been a tech at BMW for 6 years and know first hand that VVT or Vanos like the germans call it is not going away and it is the way everything will be going.

Same way people feared HEI distributors and swapped points dist. back in and tore off efi intakes from tpi engines and threw carbs on.

The car went for it's last drive of the year with the 500ci/tko600 combo and will be going back together with the L92/T56 setup or the tko. Trans hasn't been decided yet.

Jimbo1367

Still waiting.

SweetS10V8

iTrader: (4)

This made perfect sense, I googled it and Comp has done this. I just dont know if everyone knows about it yet.

Comp Cams #5456 (Early phaser)
http://www.byunspeed.com/product_inf...ducts_id=11722


Comp Cams #5460 (New phaser)
http://www.byunspeed.com/product_inf...ducts_id=13488

Jimbo1367

Any time to check on that MATT?

Sales2@Texas-speed

iTrader: (5)

Not yet, Jimbo I've been out sick and am way behind on everything currently. I'll try to get some info sooner than later.

Coban

iTrader: (14)

Thanks! I eventually stumbled onto a comp catalog update that specified this as well.

I tried to get a cam kit from TSP, but the part number off the phaser seems to be required in order to figure out which cam core/phaser is needed. For a daily driver, its just a difficult thing to do.

I really wonder how people are tuning without the cam phaser timing data that TSP provides with their custom cams. That's what originally got me interested, but it is a $100 premium....

cam

iTrader: (9)

The tuning "secrets" of VVT are seriously holding back development for a lot of guys. Now that I have three VVT equipped vehicles I will be playing around like mad with the tunes. Plus HPtuners only has VVT tuning in the current beta so support from their end is minimal as well.

Jimbo1367

Thats the problem. I bet that these tuners(most) aren't touching any VVT tables. Just not trying to change the phasing at all, merely the timing and fuel.

I am leaning towards TSP if they ever do some LY6 R&D

cam

iTrader: (9)

A lot of tuners dont and it works but I've seen other people brag of how much power is left on the table under the curve if you optimize the VVT tables for power rather than fuel mileage which is what GM uses the VVT for primarily. So not tuning the VVT specifically for your set up is leaving a lot of performance on the table. It seems kind of senseless to me to run a hopped up VVT engine without getting the maximum benefits from it. So more info needed and we're working on it

futureuser

iTrader: (1)

I just started a new thread on this subject. I spoke with Mast today and they just finished testing it with 509hp. It is uncompromised for DOD or 5.3 applications. I hope HP tuners and efi live can step up support it without using the Mast ecu.

Jimbo1367

Glad to hear. I am curious if its the same cam they call LY6HO/480HP. MAst probably just retuned it.

Jimbo1367

THIS>>>>>>> is eggs-actly what I am talking about.

futureuser

iTrader: (1)

According to Mast, new cam. 509hp.

-TheBandit-

iTrader: (1)

I'll give Mast a call on this as well. I'm curious if it's the same as their L99/L92 "SS" cam (230/237 .588/.607 111LSA). The learning curve should eventually flatten out for VVT tuning now that the L99 is in so many Camaros. Give it some time. I would think if you asked nicely enough Mast or Comp would give you their dyno-developed cam timing table.

-TheBandit-

iTrader: (1)

I haven't been able to get ahold of Mast yet, but I was looking at their new 2011 catalog and they've listed a lot more and a lot more aggressive VVT cams than listed elsewhere on their site. See page 15: http://www.mastmotorsports.com/2010/...ts_Catalog.pdf

964-106 225/241 .614/.624 110LSA 113ICL
964-107 229/245 .617/.626 110LSA 114ICL
964-108 233/249 .621/.626 111LSA 115ICL
964-109 237/253 .624/.627 112LSA 116ICL
964-110 241/257 .626/.627 112LSA 116ICL

I'm curious about P-to-V clearance with these cams. The LSAs are a little tighter also.

cam

iTrader: (9)

Id like to try that one. I wonder what lobes they use?