Join Date: Apr 2005
Location: Great Pacific Northwet
"The 100+ lbs weight gain does seem to be huge," Depends on the perspective...
For the car that the Vette bits will be added to, let's consider weight gains vs. horsepower gains:
Granted the final #'s aren't in as to where this car will end up weight wise when completed... but from these initial findings... 107 lbs added replacing existing parts... for a stock 2822lb car (US version)... equates to a 3.8% gain in weight. Now then... let's compare changes in horsepower due to an engine upgrade for this car. Stock 2.5L 12v Busso V6 = 160hp. A big bore, naturally aspirated 24v 3.5L Busso, depending on modifications, is rated @ 300-325hp... but for arguments sake let's be conservative and say 275hp (my modified 24v 3L in my 164LS is 250hp). That's still a 72% increase in horsepower over stock configuration...at a minimum. Is a ~4% gain in weight going to be a disadvantage here?
To equate to lbs per hp. Stock config 2822lb/160hp = 17.64lbs/hp. This project, 2929lbs/275hp = 10.65lbs/hp
That's at least a 65% improvement/reduction. I'd say a ~4% weight increase in this scenario does not matter.
Some additional bracing will be employed, but then some interior weight removal, torsion bars removal, and lighter brake calipers & brake rotors will also be used to counter weight. Also the rear IRS cradle will be narrowed, as well as half shafts shortened. So it will be interesting to see where the car finally ends up, weight wise. But in the end, given the BIG HP gains, whatever gains in weight that might be incurred, statistically are not enough to be of a significant detrimental effect. And the end goal here is that I get a bullet proof drive train aft of the flywheel. (Not to mention better shifting, 6 speeds, large selection of gears and final drive ratios, C6 diff upgrades options, large racing/aftermarket support for this Tremec based T/A, better availability and pricing of parts, etc, etc...)
67 Duetto - Angelina
73 GTV - Sharkey for Sale!!!
84 GTV6 - Signore Busso - Skunk works project
95 164LS - Black Bomber - 6sp w/Q2 LSD
Last edited by Renaldo; 02-23-2017 at 12:26 AM.