Quote:
Originally Posted by KILLSHOTS
I wasn't attempting any comparisons whatsoever. Even though I've moved on from my Z, I have a soft spot for the LT5 and always will. Comparing a C4 ZR-1 to a new Stingray is the epitome of "apples and oranges".
If you truly want to refocus, then please try re-reading my statements vis-a-vis post #17...
Dom suggested that the LS/LT guys try making big power with stock heads. I pointed out that the Z06 has stock heads. Only THEN was the Z06’s supercharger brought up. So I responded with examples of easy big power without superchargers. I did not – and my intent was certainly not to – compare the LT5 to LT1/LT4 engines. Further, this thread is about Lee’s cool experiment with an open plenum, not about what current gen LT engines can do with 25-year newer tech and cheaper parts.
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No offense intended; really not taking issue at all. As it happens, whenever the LT5 modifications/performance topic comes up, virtues of the current GM motors comes up as predictably as sunrise w/o acknowledging the "apples to oranges" aspect of the comparisons.
By "refocus", I meant to examine the scenario at hand; that is, the 5.7L LT5 platform modifications/results, specifically to the exclusion of other platforms to limit contaminating the discussion.
As far as Dominic's post goes, I don't know for sure, but "reading between the lines" I suspect Dom may have been endeavoring to expand the LSx performance characteristics comparisons to include the near idle or low speed drivability comparisons accompanying the performance spectrum ; i.e.,
smooth or near smooth idle (would be my guess). For example:
Likely as not, when id comes to performance mods, driveability (especially at idle or stop and go traffic) gets the short shrift; some even go so far as to say, "who cares if it idles rough as long as (speed/power) is achieved?"
Well, perhaps that's all that matters to some. But, to others, myself included, a rough-idling, over-heating in traffic, often stalling beast with high stall rpm converters, or no off-idle torque...is no fun to drive: been there, done that!
So, another way of evaluating performance is to include
drivability (stock or at least nearly stock smooth idle and manners in traffic with the AC turned on and meeting emissions criteria ;
"Having your cake and eating it too!" in other words). When you do that, a lot of motors (big cammed especially) go out the window. But, this is where the DOHC shines! (I think is at the core).