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The solid motor mounts work! The frame flex is gone. The vibration is not bad at all, and unnoticeable at speed. No movement when cranking the wheel against the stops, or when revving the engine.
Also, I got to drive with the Borgeson finally. Very nice, very responsive. No slop, very tight, no wondering or constant corrections. The autocross track will tell if it all works.
Excellent! I might have to get some solid mounts at some point too then. I had thought they would be very harsh.
Frame flex because of steering gear? Yikes. Shouldn't be any different stresses than the full manual sector.
I think I may need to make a whole new chassis one day with a proper double wishbone IRS and properly done R and P, and the equinox electric assist steering.
I think I may need to make a whole new chassis one day with a proper double wishbone IRS and properly done R and P, and the equinox electric assist steering.
From: I tend to be leery of any guy who doesn't own a chainsaw or a handgun.
Originally Posted by Luce
I think I may need to make a whole new chassis one day with a proper double wishbone IRS and properly done R and P, and the equinox electric assist steering.
Double A-arm rear suspension doesn't package worth a crap in a C3. Takes a lot of rear bodywork butchery to fit those in.
"Properly done" R&P setups in C3s have been done for years with C4 (and other models) steering and suspension parts.
The Equinox system looks interesting, but again, packaging of that unit, and sourcing a correct width "proper R&P" will take some thought.
I drove the car to work today, across Harris Grade, to Santa Maria. This thread is supposed to be about the weight saved with my Borgeson install, but I can't get over what a difference my solid motor mounts have made. I've always notice the front fenders moving under heavy braking. Not anymore. The fenders don't move, the chassis doesn't move, and the engine doesn't move. Solid, like a rock.
Bee Jay
Thanks on many fronts! The picture on the scale is perfect, I'm working on my '74 and it looks just like yours with the 80-82 tail. I may need to look up your other posts, but what else did you do to lower curb weight?
Here's my list of changes (I like to think they/re upgrades) on my 74 L48 base coupe:
TQ-2 wheels
aluminum heads/intake/water pump
long-tube headers/jet coated/2.5' stainless with mufflers.
aluminum radiator/dual fans
700r4 conversion
(about to pull trigger on) Borgeson upgrade
remove spare
all rubber removed & replaced with poly.
all light bulbs replaced with leds ('cept markers)
removed fume filter thing, plugged link, vented cap
removed mech fuel pump, added electric pump in back, used return line.
high torque starter
Serpentine (from 92 caprice) update, not sure if any gain/loss from this.
Due to budget, I can't do swanky control arms & alum calipers. Also can't do LSx conversion. Already got new rear spring, so no fiberglass. Car has A/c, ('am keeping ac!). Also adding DEI heat shield on tunnel & floor. (not willing to sacrifice climate comfort...my 'application' includes a climate friendly environment for a certain passenger.) And thank you so much for reporting out on solid motor mounts...i already had them ready to go and am psyched for the validation.
I'd love to get to 3000 lbs, but am not sure it will happen. What did you do different on yours? specs say factory curb weight was 3400 I think.
Last edited by Cool bean; Jun 17, 2016 at 12:00 PM.
I forgot to update, but I did add the Ridetech brace. Well worth the money. Nothing moves when I crank the steering now. The front is solid like a rock.