L82 upgrade thread





I would bet that your combo would be really potent with even a 4 speed with those 3.70 gears instead of the turbo 350 trans!





A RS500 5 speed conversion is on the chalkboard. And eventually upgrade to 383 in a few years.
Last edited by DucatiDon; Feb 4, 2013 at 10:07 AM.










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So it has felt like the secondaries were sporadically kicking in, and sometimes not kicking down a gear.
Sure enough, the tranny kickdown cable was too short, preventing full WOT. I adjusted the cable (just enough adjustment to work with the performer rpm) and whaddya know??
She runs like a raped ape. Also set the timing to 36 degrees. Mucho Grande!!
So, with full timing AND full throttle she gets out of her own damn way rather nicely.
Im taking her in for tuning on the dyno next week and have the carb recalibrated for the increased air flow. I will post dyno data when I get it.
Its fun to drive again!






Another short story long:
Took the car in for dyno tuning to Modern Classics here in Portland Oregon.
Steve was very gracious and seemed to know his way around a Qjet so off it went.
Unfortunately once on the dyno it developed a bunch of gremlins. Power steering leak, Transmission leak (All pre-existing), pipe plugs in the heads worked loose and started leaking...choke power wire lost power, etc..ugh..it was a nightmare. Steve kept his cool, set it on the backburner until he could get it in.
He spent hours tuning the Qjet, but couldnt get better than 18:1 AFR at idle.
So rather than continue to fuss, we slapped on an Edelbrock AVS 650.
Tuned in no time and down the road.
He didnt run it very hard on the dyno, so I dont have peak numbers, but by reading teh curve it looks like a solid 300hp at the wheels at 6500 rpm. (modest guestimate)

Peak run was cut short at 4800 rpm. This motor revs nicely to 6500.
Ill be sending the Smog-ra-Qjet out for rebuild.
Timing is at a conservative 12 initial, 28 @ 2200 and he added an adjustable vac can so it sits right at 45. (Ill likely advance that a little and see what I get.)
The carb is jetted at 65/52 rods with 400 jets. Pink Springs.
I now have 12.7:1 AFR at WOT idle and cruise.
Not bad for a 220hp net car.
Now on to the next project..leaks!
PS: My 38k L82 had the heads changed at some point....it had 1.94s not 2.02s....
Last edited by DucatiDon; Mar 25, 2013 at 11:24 PM.





Let me know if you'd still like me to run through it for you and we could probably work something out. I know the late 70's quads real well.


Thx for sharing Don,
cardo0





Trans is probably all original, and needing some love. Since a 5spd is on the future plate, Im not planning on sinking much into the auto.










Good job and let's see the numbers!!!

