Quote:
Originally Posted by DavidBoren
Personally, I would retain the vvt. The more aggressive of the vvt cams available from comp cams is actually very comparable to the LS9 cam.
LSA: 198/216 .480/.480
LS9: 211/230 .562/.558
Comp vvt cam: 218/222 .566/.578
All with a ~114 split.
I think the benefits of the vvt would be worth keeping.
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Mixed bag here - depends on your goals.
With HP desired, will not make it even close with these milder cams. Running a more aggressive cam with VVT requires a phase limiter to prevent piston to valve clearance issues. Once you do that, benefits of VVT are greatly diminished.
This is a dual-equal VVT as well (single cam) - not a DOHC or even cam-in-cam (ala Viper). Benefits of VVT are already not nearly as good with dual-equal.
VVT benefits include dilution (for FE and emissions) as well as broadening TQ band. Seeking these power levels means FE is not a top priority. Going in an older car - so emissions not an issue. The need to broaden TQ band on a positive displacement SC engine is also not an issue. Depending on front end clearance, VVT hardware requires truck FEAD (front end accessory drive) or at least spacing further away from block. And more s**t = more s**t that breaks.
I love VVT - especially with DOHC - but need for it in this application I'd question.
Dave