By my calculation the KB 107 will put me at 10.88 to 1. Add in some cam over lap and I should be around 10.5 to 1?
I don' mind running 91 fuel as I don' drive the car much.
Thoughts?
I've run those KB107s since 1999. I run them up .005 out of the holes, and with the small Eddie heads., and with an old Hughes 230*FTH cam . It came in at 10.9Scr with the .039FellPros, and IIRC gets me 180 psi
Static compression ratio of 10.9:1.
Effective stroke is 2.79 inches.
Your dynamic compression ratio is 8.72:1 .
Your dynamic cranking pressure is 178.73 PSI.
V/P (Volume to Pressure Index) is 153...............................................
153
The Q came in at .033 plus minus .002.
I run this with a manual trans with a3.09 low gear and 3.55s. It's the most fun you can have with your clothes on. Tons and tons of torque at any legal speed, and plenty of power, and goes 93 in the 1/8th.
Oh yeah, and it has never burned a drop of anything but 87E10. So next time,lol I'm pumping it up to 200 psi, and let that buck!
You can do the same thing with the pistons down in the holes,( I think the 107s came in at .011 down) and run .020 gaskets That will get you a Q around .031, and so a tiny bit more compression. And you can run a 223cam for even more down-low torque, and yet more pressure. and only lose a bit of top-rpm power, where you only ever go once or twice, every now and then.
I ran this for awhile, maybe 3 years until it dropped lobes;
Static compression ratio of 10.98:1.
Effective stroke is 2.85 inches.
Your dynamic compression ratio is 8.94:1 .
Your dynamic cranking pressure is 184.55 PSI.
V/P (Volume to Pressure Index) is 161..............................................
161
This too ran on 87E10 exclusively with 34* timing in at 3400 rpm, and 28* at 2800.
I ran 750DPs on both of them. 93 in the 1/8 translates to 403 hp in the qtr. My 367 cannot possibly have that much power. I don't believe that for a second. The bulletin book expects me to have a 4 speed and probably 4.30s. to hit that forcasted 115. So then it would expect me to run
first up to 45, and then second to 63, and then third to 86, and then drag 4th to 93, finishing at 4970 way off the power
But My GVOD splitter pulls
first up to 44, then first-over to 56, then second to 71, and tops out at 93 =6150 in second-over. Pow!
But I digress.
I'm at 950 ft and I did not enter that into the calcs.
I put the Eddies on OOTB, And some say that is dangerous, but the point is they were un-ported, Both of these cams were installed with the Hughes 1111 springs and both cams pulled hard into the upper 6000s, and most of the time,they have been shifted at 7000/7200. I only run there, cuz the tires never stop spinning, and she sounds outrageous thru the TTIs and dual full length 3" pipes with the Long Dynomaxers. Outrageous I tell you. You gotta build it just to let her sing at 7200! I got over 100,000 miles on that engine now, and the last time out, it was to-the-pin!, business as usual.
You will have to do some oil-system mods to make your rod bearings live at these rpms but they are no big deal to do. I run a 7 qt pan with 5 or 6 qts in it, never more than 6, except the time I went to the track, then I topped her up. You will have to get the stuff balanced, no question about it.
The 223* cam will pull any rear gear........a-n-y gear. I ran it with 2.76s for awhile, and it just lit up the 275s like nothing.I ran that combo with almost every rear gear you can imagine; from 2.76,2.94,3.23,3.55,3.91,4.11,4.30,4.88,and 5.38,. I had 'em, so sue me.
Eventually, I got me a GVOD and ran the 4.30s for like 2 summers. Then I got me a 3.09low/ not od gearset and 3.55s.This has been my favorite now for many many years. I run the GVOD as a splitter which makes it incredibly versatile. You can't touch it with an automatic...in the 1/8th. It's one pull on the stick, and two electric shifts, for a total of 4 ratios, 3.09-2.41-1.92-1.50. You can't touch that!That unit shifts so fast and so hard, I had to take the CFII disc out and install a regular 340 factory disc. No they don't live that long, but stuff doesn't break behind it any more either. It was still too harsh for me and so I shimmed the PP away from the Flywheel to where the hit was much softer below 3000. But When I spin it up,the flyweights take over, and, it's still BAM! and the tires never top spinning at any legal limit. Yeah BFG or Cobras, 295/50-15s,same shite.
You can't go wrong with your recipe, just build it!
oh yeah,
The VP of 161 is a tic higher than what a 69 440 Magnum will math out to.FYI.
