Topics

1

Maintenance / Solid Lifter Valve / Carburetor Adjustment(s)

« on: September 12, 2020, 07:08:38 PM »

Stock DZ302, Holley 4053 - While I've had numerous SBCs over the years, I've never owned a solid lifter motor / car until now. I am interested in checking the valve clearance as it seems a tad noisy to me. I read from the Chassis Service manual that the clearance should be 0.030" (intake and exhaust) while hot. I understand the manual to say that they should be adjusted with the motor idling (?). I've adjusted newly assembled hydraulic lifter motors running numerous times but am not clear how this would go with feeler gauges and the solid lifter motor running. Please advise on what the preferred method is - statically with the motor warm? Other? I don't know for a fact that the cam, etc is stock but believe it to be.

Also the car doesn't want to idle warm less than about 1200 rpm. I know the spark plugs were replaced before I purchased it. I need to verify other basics like the points, timing, etc. but am interested in other's thoughts regarding purchasing a rebuild kit for the Holley 4053 if other basic parameters check OK. The external portions of the carb look great but have no idea how old the internal parts are. The inability to lower the idle and have it maintain a normal idle is something I want to correct. Thank you!

2

General Discussion / '69Z Coil Spring Suggestions

« on: August 10, 2020, 04:31:07 PM »

Hello, I am a new owner of a pretty correct / older restoration '69 Z28 and brand new to the site. Reproduction E7015 tires that were on the car when I bought it rubbed when turning sharply.  Measuring from the fender lip, the drivers side is approximately 1/4" lower than the passenger side measured at the wheel centerline. I haven't found a good reference to what the stock ride height is supposed to be but feel that my springs have sagged.

I bought a set of 235/60-15 BFG Radial T/As to run on 15x7 rally wheels based on several tire size references with positive experience (no rubs) within this group. Unfortunately, the new tires, shorter but wider than the E70s, also rub.

I am thinking it's time to replace the coil springs. I have found references to a couple of different Moog part numbers - 6308, 6320, and possibly others. I am interested in other's experience and advise on whether spring replacement is the right move and if so, what the recommendation is. My goal to be clear is to have a stock height and no tire rubbing with my new tires. Thank you!