[monte61]

just finished building my motor and was wondering if someone could give me an educated guess on approximate hp/tq based on my basic componets. 4 bolt main block .30over355ci
3.48 stroke
6'' h beam rods
wiseco forged pistons
12.5 cr
64ccpatriot aluminum heads 190cc 2.055 int.1.60 exh. 1.60 rollers. hurricane intake msd 6al box w6500 chip msd billet dist holley750 carb.
thanks for any help

[techinspector1]

I don't have any idea how much power it will make, but I do know that the 6500 chip won't work. At 12.5 c.r., you'll need a cam that will make power from 4,500 to 8,000.

[monte61]

its a lunati voodoo cam # 60104
rpm range 2200-6400
duration@.50 233\241
lift 504\525

[DR132]

if I were to guess I would put horsepower numbers somewhere in the 425-450 range, torque I'm not so great at guessing so I won't bother...if I remember to I might fire up the other computer and run your specs through desktop dyno...

[techinspector1]

Originally Posted by monte61

its a lunati voodoo cam # 60104
rpm range 2200-6400
duration@.50 233\241
lift 504\525

OK, let me put it another way. This cam was designed to be used with 10.0-10.5:1 static compression ratio.
If you use this cam in a motor with a static compression ratio of 12.5:1, the early intake closing point will trap an excessive amount of mixture and the motor will detonate like shaking rocks in a tin can, followed closely by the disassembly of the top ring lands on the pistons and cracks running through to the wrist pins. Maybe that will be a little easier to understand.

[monte61]

Ok then.so the cam is too big i thought as much i got it for free. a buddy had it and said i was going to hate it. bought the pistons when gas was half what is today!!!!!!!!!!!!! Im thinking of a nice set of flat tops. best bang for the buck. forged??? or hypereutectic.??? with the cost of racing fuel i need to get the comp. down to pump gas range. or am i going the wrong way keep the pistons and change the cam or both... I have a crane cams blue racer
488/510 with a duration of 234/244 ,, I need to get it in gear. the wife is driving me nuts. she wants to drive it real bad !!!!!!
thanks for your help keeping me on track


monte61

[techinspector1]

No, you misunderstand. The cam is too SMALL for the available static compression ratio. If you want to do this properly, please provide some information.....
type vehicle and weight
intended purpose of the vehicle
trans type and rear gear ratio
is idle quality important?
will you need to operate vacuum operated accessories such as power brakes?
do you want to keep the 6" rods?
operating range of the motor.....idle to 4500, 1500 to 5000, 2000 to 5500, 2500 to 6000, 3000 to 6500 or what?