[BadAss70Nova]

My freind is building a nasty 283, its punched out .30, keith black domed pistons, steel crank, solid roller cam, h-beam rods, studded bottom end, brodix heads 2.02/1.60 IK200, Hurricane intake, 700 holley dp, hes looking to see how much hp and tq he can crank outta this thing, any idea of a ballpark estimate?

 

[BadAss70Nova]

Building a nasty 283

My freind is building a nasty 283, its punched out .30, keith black domed pistons, steel crank, solid roller cam, h-beam rods, studded bottom end, brodix heads 2.02/1.60 IK200, Hurricane intake, 700 holley dp, im wondering how much hp and tq u can crank outta this thing, any idea of a ballpark estimate??

 

[Ryan V64SS]

A 283 bore is too small for the 2.02 valve from what I was told. But if the bore was notched then maybe. My guess is around 460-475 hp.

 

[BadAss70Nova]

A 283 bore is too small for the 2.02 valve from what I was told. But if the bore was notched then maybe. My guess is around 460-475 hp.

i see, but wut do u mean by if the bore was notched?

 

[Ryan V64SS]

The 2.02 valve can hit the top of the bore on a 283 so if a notch is machined there then it could be ok.

 

[BadAss70Nova]

The 2.02 valve can hit the top of the bore on a 283 so if a notch is machined there then it could be ok.

would that depend on wut kind of pistons ur using also?

 

[veno]

300

 

[veno]

nope total valve lift.....


2.02+1.60 = 3.62 add .050" space between the valve faces= 3.67...
283 bore= 3.875+.030=3.905/2=0.1175" clearance per side wall... High rpm valve deflection Wit a .750 lift... will clank...

 

[bowtie0069]

would that depend on wut kind of pistons ur using also?

Only if the bore is under 4.00"

This isn't a Chevy, but it shows the notching needed to clear large valves with small bores:

 

[JRouche]

A 283 bore is too small for the 2.02 valve from what I was told. But if the bore was notched then maybe. My guess is around 460-475 hp.

Wow!! 460? That ambitious... We dont even know the CR. How do you see 460hp?? I was thinking closer to 375, maybe. But we will never know unless its put on the tug. But 460hp sounds a lil high. Even with race gas and a 11:1 CR I dont see above 400. Interesting. JR

 

[tnblkc230wz]

I'm thinking that is a hole lot of head and intake for a 283 unless he plans to run it to 8K RPM.

 

[Paul Wright]

If you get a pretty decent 1.25 hp per cube you are looking at 340-360 hp at 7000 rpm

 

[283nova]

more then 300 there buddy.id say a stout 400 horse is in order. how big is the cam and how much compression? not to be rude but why didint he go .125 over? ive got a cam for a 287 sitting here haha, my good buddy jerry clayton some of you may remember him from the keeling and clayton california charger cars of the 60's-70's? i got a solid roller crower form him from a car he was building in the 70's a monza with a 287 this cam is .734-.690 launched at 8500 shifted at 10. id say a stout 400 horse is in order. nobody ever gives these little motors credit and its downright ignorant.:bored:

 

[fastbruce]

more then 300 there buddy.id say a stout 400 horse is in order. how big is the cam and how much compression? not to be rude but why didint he go .125 over? ive got a cam for a 287 sitting here haha, my good buddy jerry clayton some of you may remember him from the keeling and clayton california charger cars of the 60's-70's? i got a solid roller crower form him from a car he was building in the 70's a monza with a 287 this cam is .734-.690 launched at 8500 shifted at 10. id say a stout 400 horse is in order. nobody ever gives these little motors credit and its downright ignorant.:bored:

The old 283 blocks are terrible .30 over is dangerous, they have terrible core shift and are 40+ years old the cylinder walls are very weak, the iron used was very pour quality, the best place for a 283 is under the hood of a 57 Chevy.......That wont be driven

 

[BadAss70Nova]

more then 300 there buddy.id say a stout 400 horse is in order. how big is the cam and how much compression? not to be rude but why didint he go .125 over? ive got a cam for a 287 sitting here haha, my good buddy jerry clayton some of you may remember him from the keeling and clayton california charger cars of the 60's-70's? i got a solid roller crower form him from a car he was building in the 70's a monza with a 287 this cam is .734-.690 launched at 8500 shifted at 10. id say a stout 400 horse is in order. nobody ever gives these little motors credit and its downright ignorant.:bored:

very nice setup, my freind will be using a .600 lift solid roller camshaft, and a nice pair of brodix IK200 heads

 

[Ryan V64SS]

Wow!! 460? That ambitious... We dont even know the CR. How do you see 460hp?? I was thinking closer to 375, maybe. But we will never know unless its put on the tug. But 460hp sounds a lil high. Even with race gas and a 11:1 CR I dont see above 400. Interesting. JR

My 406 is around 1.4 hp/CI on pump gas, he stated Domed Pistons so obviously it has high comp, solid roller, good heads, i see that motor over 8k RPM 283's like to rev. 283x 1.5 is close to 460. Thats just a guess. For a 283 on kill that is not too unreachable.

 

[BadAss70Nova]

the compressiion ratio he is gonna be a 11:1

 

[Ryan V64SS]

The old 283 blocks are terrible .30 over is dangerous, they have terrible core shift and are 40+ years old the cylinder walls are very weak, the iron used was very pour quality, the best place for a 283 is under the hood of a 57 Chevy.......That wont be driven

283nova's point exactly

 

[BadAss70Nova]

283nova's point exactly

which is wut??

 

[veno]

300 jeesss.......

super comp 268ci.. 8:20 in the quarter... ultralight winberg crank, Al rods. gas ported super light Teflon 4 button pistons.. low drag ring pack(0.043)

slighty more that 300hp...