To Quench or Not to Quench?
....and I'll add this for food for thought. Ed talks about the 1" lifter thing.....which is a really cool idea and all, but nothin new. Mushroom lifters have been around a LONG time and serve the same purpose. To have more surface area for a more aggressive cam lobe. I am certain since the lifter diameter is .903, like other Chryslers, the slant could accept a mushroom lifter. I know Oregon could grind a mushroom cam. That would probably be more cost effective than the 1" lifter thing. Just a thought.
Only problem I see W/mushroom lifters is that they have to be inserted before the cam & if you ever have problems they can't be removed W/O a complete teardown.
I'll opt for the small added expense of enlarging the lifter bores.
So here's how the rotating asembly stacks up.
12-13:1 CR rotating assembly consisting of 89mm 2.2L KB168 turbo pistons W/-18cc dish running +.070"ish positive deck on 7.005" Molnar rods on a .025" offset ground stock crank (4.175" stroke)
Block will be decked/squared to acieve a satifactory quench distance, somehwere in the .070" area. Block will be prepped for 1" lifters.
Heads will have the deck counterbored @ a nominal bore diameter to a depth that will clean up the quench pads that already exist. The rest of the chambers will be left as is except for a polish to eliminate any potential hot spots. Valves sizes & port geometry to be determined but if possible, small stem diameter valves will have tulip shaped heads to add to the already cramped combustion chamber voluume.
The head deck will be reduced about .110" to achive the desired quench distance values.
Buick straight 8 rockers will be utilized for 1.6 rocker arm ratio.
Cam, valves, ports, induction, exhuast will be sec'ed to maximize TQ in the 3000-5500 RPM range W/peak HP around 5000 RPM carring to 5500 RPM W/O a rapid drop off.
Hopefully CR can be dropped somehow to a level that will allow 93 octane pump gas to be used. If not, perhaps water methanol injection will be employed.
If WM is employed, CR will be kept higher, perhaps as high as 13.5:1.
3000 RPM stal on 4.10 gears W/28" drag radials 2800# wet W/driver.
