Junkyard BEAST!
You want me to design you somethin on my computer dyno? gimmie some parameters...like what you want out of it.
well i dont want to sound like a lazy bum, but its more cam selection im after and if i can get decent compression out of this thing. I still want it to have a rough idle and give me some good performance..If this thing hits a mid 12 in junkyard form ill be very pleased...faster, hell even better:thumleft:
no stock head stuff either. Brian's RHS or im even thinking now of some eddy aluminums, although obviously flow is down quite a bit from the RHS
I just dont know where to begin with it being a low compression build- not sure what changes in terms of cam choice over something with say 10.5:1 and .040" quench that i was going for before
i like this one, except with maybe more lift to utilize all RHS heads have?...
http://www.hughesengines.com/Index/...el2=V2hpcGxhc2ggSHlkLiBSb2xsZXI=&partid=26252
you gonna use a set of Hughes roller rockers on those RHS heads?
LOL you really love those things eh...all kidding aside, it looks like i probably will. My plan is to do the top end and rest of the motor the way i want to, but leave the bottom end stock for now. Then later on when I have the money, i can buy the bottom end to stroke it and already have the top end to support it (and a cam change to realize the full power gains of a new combo)
I like this build hypothesis.
Its very similiar to my own.
I could offer some input.
You will need to figure your estimated Compression Ratio.
That will require CC'ing the dish in the pistons, and the Combustion chamber of the heads you will be using.
Once you verify your CR is over 8.5:1 (stock advertised CR...btw)
I would recommend a camshaft that has a split duration grind on the Intake and Exhaust.
The Cam Card grind should read like:
224I/232E @ .050 .540"I/.550"E 112*
I would use a windage tray if you dont already have one.
I would install a NEW double roller timing chain and NEW HV oil pump.
I used a late model timing chain tensioner on my 360 to see if there were solid gains there...like more stable ignition timing....so,....food for thought.
Then, have the heads gasket matched, the intake gasket matched, and use a FULL 2.5" Dual exhaust system, and it should make over 350rwhp.
Good for mid 12's if you can hook it up and put it down.
Hey Prine, yes, when i was thinking of this i remembered your build. Im going to cc the pistons, but atleast i know what its advertised at (Thanks!). Just gotta figure out how far down in the hole they are as well, and then factor in gasket thickness, and i can truly figure compression
That cam you recommended looks good, except im not sure it will give me the idle im looking for. Seems like quite a low duration number and a wide lsa (is that because of the compression?)...I dont mind spinning this motor to 6500rpms if i have to, so that is not a concern
Motor will be getting all the basic parts of a rebuild- its stock windage tray bac, new ported oil pump, pickup tube, double roller timing set, rings, bearings, etc.
Im hoping a mid 12 is doable since the chassis is setup to run faster- caltracs with 9 way ranchos, /6 torsion bars with calvert 90/10's and RMS UCA's up front...should be a surprising combo if i can get it to run
