612 BBC Dyno results??
 

Getting ready to dyno my new 612 bbc and thought id see what everyone thought the results might be.. :lol: I was hoping to get the best guess on the HP and Torque number the dyno will show.. AND maybe what rpm it will make the best HP or Torque numbers at.. :roll:

dart big m splayed cap 10.2 block
callies 4.750 crank
6.7 eagle rods w/l19 bolts
diamond -3.2 cc flat top pistons
.010 deck height
.048 cometic head gaskets
Dart pro 1 cnc ported heads.. 355cc . 230/1.88 .118cc chamber
10.6 compression ratio
Sniper intake cnc ported
solid roller cam.. 714/714 .. 261 271 @50 ..112 center
jesel rockers 1.75 int. 1.70 ex
chuck nuytten 1250 dominator modified to 4 circuit
hooker super comps 2 1/8

also going to run a single plate nitrous system at 150hp but just lookin for a guess on engine alone ... no behind door #1 for the closest guess but you get to puff out your chest a little and say..I knew it all along... :shock:

Must be a pump gas or street motor with the lower compression and cam.

Sounds like a beast though.
Goodluck with it, Charles

Yeah it's a pump gas.. street.. go to church on sunday mornin ..Im always running late kinda engine :lol:

yea im thinkin you probably wanna keep as LITTLE nitrous in that motor as possible!!!your lookin at a 1.125" piston height to wrist pin.ive heard that a 1.250 is really about as low as you wanna go with nitrous.i built a 572 with the 6.7 rod and 4.5 eagle crank and my je flattops had piston pin through oil ring land on piston.my max nitrous intention is about 250-275 shot.

as far as your guesstimation...id say 800 tq@4600 rpm and 850 hp@6000.

im guessing that that cam will be a torque king!strong midrange power but a little limited to 6000-6400 rpms.but with that big arm youll have all the midrange power youll need to bend a stock suspension car into a pretzel unless it has atleast a small cage! good luck and let us know your experiences-russ

dyno done !!
 

Well Damn you were close.. at least on the rpm.. and HP
Torque was 884 ft lbs @ 4500 :shock: :shock: :shock:
HP was 868 @6000
HP went down to 843 running thru the 3" borla mufflers ( now thats a good muffler!! )

These are real world uncorrected #'s...!!! :lol:
I cant wait to get this beast in the chevelle and go a huntin !! :twisted:

Cant imagine how this is gonna feal with over 800 ft lbs of torque from 3900 to 5400 rpm.... :shock:
might have to take along a roll of toilet paper the first couple times out :oops:

cranking compression was @ 170lbs
so this is one stump pullin pump gas combo..

I didnt have it in me to even try out the 150 shot of NOS..I'll save that one for later...much later!!! :roll:

That is some great #'s on the new motor. So be very careful on the street with that kind of power. Have fun with it.