HP output? pllllleeeeeaaassseee

[dammitmitchell]

ok guys i pulled my heads today and well i found some goodies me OR the PO diddnt know about so.. needless to say im freaking excited here.. and im sorry if i seem noobish.. it's been a while since ive torn down an American motor..

block
350 bored .060 over
gm 5.7l
the number next to it is 14010207
next to that is a stamp says M27
side of the block states 207
front id states V0901ZBA
105122952

Federal Mogul 350 cast pistons .060 over

crank is
3932442 3.48 69-85 2.45/2.10 cast large journal

heads are casting number 462624
76-87 1.94/1.50
& 2.02/1.60 76 CC Chambers

cam
RENEGADE PN 158881
dur@.050 Int 234 exh 244
vaulve lift int .488 exh .510


intake edlebrock perfromer RPM highsise
spacerplate (1in)
carb holley 670 carb with factory jetting..
(i might have to jet it up.. not sure yet..)

and "nothing special" for the distributor just a stock hei
(not sure because i diddnt buy it..)

once again i do appreciate all of your input!
you guys rock!

[mongoose]

300 or less..

maybe a little more depending if those pistons are flat tops.

[dammitmitchell]

domed....

[Marv D]

Hopefully you won't get too excited here.. the suffix code, ZBA, used in 1979 for the manual trans, 4bbl carb corvette motor. Output,, a measly 225HP. Remember we were in the meat of the emmissions era then. NOTHING made any power.

ZBA was also used in 1983 for the crossfire injected Corvette 350, delivering a whopping 200 HP.

The 14010207 was only used from 1980-1985,, making your BLOCK the latter from a 83 corvette ORIGINALLY

Kind of disappointing eh. Thing is, it's +.060 already, the block is all done. If the bores just need a touch hone your OK, but if there worn or scratched that would take a boreing bar to clean up. It's junk.

The heads are 1975-1986 typical emmissions era smogger heads. Probably better then the late model light weight castings, but not necessarily a performance head either.

So you know where some of the components came from. Just keep in mind as the engine re-manufacturers put things together in these shops the 'original' application means very little. Yours has been bored +.060, apparently no longer has the crosfire injection, and take that as a HUGE plus

The cam is probably capable of 300-320HP in a 350 with a well tuned motor,, assuming it's configured with a flot top piston, normal deck and somewhere in the 9:1 compression range.

that's my take anyways.

[dammitmitchell]

so what is the crank
gosh.. well i pulled the heads to find out what the deal is..
buuutttt.. was wondering finally ya know.. cause i want 300 HP by the end of the summer grrr... well at least after a little cleaning it looks great inside
heads will be swapped next summer..

dang.. i was reeeaaaally hoping for a stroker hahahah

[dammitmitchell]

ok gentlemen...
with "this stuff" i'll admit.. i an NOT good with numbers.. so can you explain to me how the individual parts effect the HP gain.. i have to be pushing more then 250...
there's no way i can be doing burnouts in second with 37's with 250 hp......

NOT OT ARGUE.. ever.. just wondering if yall can explain this to an avionics guy... i thin in OHMS not CI.. and HP..

how does the effect my TQ rating.. cause that bad boy and move some weight when i want it to....
thank you for your patience..
and if u think im just being retarded let me know...

[Marv D]

This is why I hate the 'horsepower' thing all together.

Horsepower is: 550 ft pounds of torque per second

Torque and horsepower are equal at 5252 rpm because,
torque * rpm / 5252 = HORSEPOWER

Horsepower is really a meaningless thing for 90% of all street cars. It's not Horsepower that let's you spin the tires at 2000-2500rpm, It's not horsepower that you feel in the butt-o-meter when you stomp the gas,,,, it's TORQUE

The emmissions era motors were cam'd to make BIG torque numbers at low rpm's. For 99.999% of all street cars: a motor making 300 ft pounds of torque at 2200rpm will feel 10 times more powerfull on the street than a 400 or 500HP SBC motor. Why?.... most high HP motors make their power in a high rpm range. In fact if you look at dyno sheets most race SBC's make their peak power at 7200-7400rpm. To make those big HORSEPOWER numbers you have to sacrafice low end torque in favor of making up the power on the high end. Also most dyno sheets don't even start logging power till 4500 to 5000rpm because it's meaningless to the racer. The numbers are so low down there we don't care. So we have to put insain 5.43:1 rear gears, 5000 stall convertors in the thing to get the motor up into the meat of the torque curve to be a usable motor.

On the street you are not launching at 4500-6000 to get into the 400+ ft pound of torque range,, the motor is cam'd to make 300+ ft pounds of torque available at 2500-3500rpm.
So take 300 ft pound of torque, times 3000rpm, divide by 5252 and you have a whopping 171HP. That makes the 'HORSEPOWER' numbers look dismal, but ... if you were to put a 3000rpm limit on the 600'HP" race motor, the 171HP car wouuld probably beat him to the 330 mark.

TORQUE it king on the street. Torque is what accelerates the car not HP. Just forget about the HP and HP ratings,, build your street motor for as much torque as possible and you will be MUCH better off.

[grinch4om]

amen Marv

[dammitmitchell]

i agree..
and i apologise for focusing on the HP aspect only, im sorry i got a little excited here...

it DOES spin 37's no problem on asphalt/cement and small cars..
do you have an estimate for tTORQUE?
i have attributed the "balls" of my truck to gearing mainly..
and i do apologise.. i am NOT good with numbers.. and this IS stuff i should know..
but everyone has their own weaknesses.

give me a wire or tell me to make something. then i'll be in my "bubble"...
thank you all for your input it is appreciated.

[Marv D]

dammit mitchell, do not appologize

gear ratios, the lack of traction on the street surface, tire compound, and TORQUE (you knew that one was coming) is why you roast the 37's on the street.

Does this help.. 1HP is 745 watts. Take a low speed high torque electric motor , vs a dremmell or wood router motor. Both may be able to do as much work, but the low speed high torque motor will rip the gearbox out of something intended for the 22,000 rpm's of a dremmell. Once at speed the dremmell may be able to nibble away at the wood and do the same work, as the low speed motor swinging 5 pound knives like a commercial planner.
Which will require more wats, the low speed 1HP motor, or the 22000rpm motor spinning knives that only weigh ounces, but rely on the rpm to do the work.

Making assumptions about torque is like trying to guess the weather IMO. You need a LOT of info to make educated guesses. If you want to take your truck to the track for a time slip, get a weight, measure the frontal area so we could estimate aerodynamics, and give us exact MPH and ET to increments on track, what gear and what rpm you were running at each one of those increments, then... yup,, no problem we can hit the torque # dead on the head

For the most part,, a stock emmissions era 350 will make 300-350ft pounds of torque from about 2800 up to about 3500, and closer to 400 ft pounds in the 380-4000 range.
Later TBI motors made about as much, but lowered the RPM's 500rpm or so. The 70's motors (and motors using the smogger era heads) are typically all done around 4000-4500, TBI motors typically are all done around 3600-4000ish, somewhere in those neighborhoods anyways.

[dammitmitchell]

thanl you that's the dose of reality i was looking for...
i appreciate it

[Outlaw72]

This is also why you are supposed to tune with your MPH and not your ET. Torque is what gives you that MPH.......That 300-400 Hp talk is for the bench racers over in the general discussion forum