About a year back. Never had any problem with the morels, they were just noisy when hot. I saw a few threads where JW said he was no longer using the Morels and had switched over to the Johnsons. I talked to Jim about it, and asked him, if this was your engine, would you swap out the morels? His answer was yes.
Im going out to the garage today and check, take pics. I got a bunch of traveling to do today Weird how they're in a box marked SB Chevy BUT they have a full shroud
I don't understand why the Buick V6 lifters would be too tall. Can someone explain this? I thought the valve train geometry of the V6 was the same as the 300. Jim
Same chevy part #, says American Made. Johnsons? https://rover.ebay.com/rover/0/0/0?mpre=https://www.ebay.com/ulk/itm/192581440049
No. Its closer to a sbb 340 with 2 less cylinders with a 3.400" stroke the same as a sbb 300 and the bore size of the sbb 350.
GM/Buick changed the block to taller lifter bosses like they did with Chevy and uses the longer Chevy lifters. They would be out of the hole at higher lift in the older block. The FWD V6 lifters are close to the stock lifter length. That's why the FWD V6 shorter lifters work in the older motors.
The Johnson lifters are short travel with a faster refresh rate. Preload is limited to .035. I went half a turn on my roller rockers. The push rod cup is .230 deeper so longer pushrods.
Mark, get a straight edge to line up the roller wheels exactly to see oil hole & band comparison. Almost looks like oil hole is same spot or higher than morels.
Looks like the band and oil hole are a little lower. Johnson oil hole is on the side instead of front.
Yes it is slightly higher than the Morels, oil band is also smaller/narrower also. TA's instructions say under no circumstances should the oil supply hole enter/intersect the oil galley. I'll put a straight edge on the wheels tommorow
OK, I just find this a bit confusing. How exactly is it NOT going to connect to the galley, and if it doesn't how is it going to get any oil? In one case it is drilled into the oil clearance band, in the other it is connected by the notch? clarification please. Jim
Where the heck is the side oil hole & notch in the Johnsons? Is it higher up than TA's oil hole? That would be worse for bleeding off pressure I would think. If those new rollers don't increase pressure, are you going to mic that frt cam jrnl?
I think the reason it shouldn’t directly intersect the oil galley is it would be on the path of high volume/full pressure oil, verses being somewhat shielded. My machinist was telling me about a 455 roller motor he had on the Dyno that had Chevy style rollers, and there was WAY to much oil going to the top
