Originally Posted by radomirthegreat
It'* good to see you experimenting with more stuff and letting us know. Why do you need the replacement engine to have good compression if you're going to work on it? This may be a lousy question, but I'm sincerely interested. Wouldn't you port and polish the goods and adjust everything on either a bad engine or a good engine if it goes inside the Zilla?
You may have missed the topic where a 16-year old blonde chick pumped 87 octane into my car causing me to pop a piston 5 miles later?
I'm only swapping BOTTOM ENDS. My current top end including heads will go on the new bottom end. The only performance change is a MILD custom intercooler for next year. I'll get back to a 2.0" pulley on pump gas, on the hottest summer days.
I'm dialing in the fuel pressure for the 32lb injectors in order to give myself a starting point for spring scans/tuning.
The current BOTTOM end in the Zilla will be rebuilt at my leisure after the new bottom end is installed, and I already have the needed replacement piston. It will be set aside as a spare for either of my cars that may need it. The reason for this is simple:
1. Only about 5000 Bonnevilles from 92-95 were produced with L67'*.
2. Very few other cars were, and this limits the number of available engines that are getting older each year.
3. The population density (and car population density) in the pacific NW is very sparse. This limits the numbers of available engines without paying horrible shipping costs.
I'll have a rebuilt spare short block for either car. Well-oiled and sealed in plastic. The replacement motor I found has about a 10% compression advantage over the current Zilla motor, and that'* not counting cylinder-cylinder %.
So the plan for the Zilla is:
1. Good compression replacement block, crank, rods, pistons.
2. My current ported cylinder heads, custom pushrods, and 1.8 rockers move to the new bottom end.
3. A NEW LIM and SC (machined for intercooler) move to the new bottom end, ported to match the heads, and with the intercooler parts.
1. Port the heads from the new motor to match the Zilla'* so that I can:
2. Use the Zilla'* current over-ported LIM and ported SC on the 95.
Because if I cam the Zilla next year, I can go back to stock 1.6 roller rockers on it, and move the 1.8 rockers to the 95.
Cylinder heads, LIM'*, and SC'* are compatible between both cars.
It pays to plan ahead.