Dodge LA to magnum heads
Pulled my own mag'um heads today, off my truck. Cracked and burning exhaust valves.
Weeeee
Pulled the valve springs and tested a few...
80-90lbs [email protected] max to coil bind.
I have replacement "sheistmaster" mag'um heads ported, 1.94/1.60 255/200 cfm int/exh 60.5-61cc chambers with comp 986 springs 132 seat and 240-250 [email protected] [email protected].. .065 washers under the rockers give about .025-.030 preload.. rockers are cutting it close at that height..but I dykem tested with a rubber mallet and it's in the ball park. Will the rocker bolts hang in there with 50lbs more spring. 130 is getting near the roof on the cast roller I know.. lol ah yeah..isnt this fun. Finishing it up tomorrow.
Plenum sucked a layer of the gasket of course... it was sucking oil too... scraped crust from pistons....no ridge @290k.. dont know if the motor had been changed before though...
Pulled my own mag'um heads today, off my truck. Cracked and burning exhaust valves.
Weeeee
Pulled the valve springs and tested a few...
80-90lbs [email protected] max to coil bind.
I have replacement "sheistmaster" mag'um heads ported, 1.94/1.60 255/200 cfm int/exh 60.5-61cc chambers with comp 986 springs 132 seat and 240-250 [email protected] [email protected].. .065 washers under the rockers give about .025-.030 preload.. rockers are cutting it close at that height..but I dykem tested with a rubber mallet and it's in the ball park. Will the rocker bolts hang in there with 50lbs more spring. 130 is getting near the roof on the cast roller I know.. lol ah yeah..isnt this fun. Finishing it up tomorrow.
Plenum sucked a layer of the gasket of course... it was sucking oil too... scraped crust from pistons....no ridge @290k.. dont know if the motor had been changed before though...