Thread: hp estimate

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I'm building a 355, 530/542 solid lift cam, 1.6 roller rockers, ported 350 heads with 194 valves, 9-1 compression, edelbrock perfromer 750 carb, about how much hp will I be making ?

what casting heads ?

Originally Posted by 86camaro

I'm building a 355, 530/542 solid lift cam, 1.6 roller rockers, ported 350 heads with 194 valves, 9-1 compression, edelbrock perfromer 750 carb, about how much hp will I be making ?

What is the cam duration at .050??

the duration at .050 is 248/252, I'm not sure on the casting number, I know that they have the bigger 194 valves, and the combustion chamber is 76cc giving me the 9-1 compression, I will be porting out the intake and exaust valves and intake and exhaust runners

Originally Posted by 86camaro

the duration at .050 is 248/252, I'm not sure on the casting number, I know that they have the bigger 194 valves, and the combustion chamber is 76cc giving me the 9-1 compression, I will be porting out the intake and exaust valves and intake and exhaust runners

You don't have enough compression to support a cam this size.

Originally Posted by erik erikson

You don't have enough compression to support a cam this size.

Exactly right ....my 305 would outrun that motor if you put that cam in there.

yah that is way too much cam and way too little compression for a cam that big you would need about 10.5:1 or more. the lift is a big factor but the duration is very improtant. the longer the duration more fuel and air go into the motor, and with that low of compression you will lose power and also have very bad fuel consumption i would go with something like maybe 512 lift and 210 duration @.50 something around those numbers should help you produce a lot more power

not trying to be rude or anything but are you going with that cam just so it will sound good.....because there are other ways of getting that huge cam sound, with a small block you can go with a smaller cam and get that huge cam sound something with the abouve mentioned lift will sound great in that motor

Comp cams has the new pro stock sounding cams for a regular motor! Really!!

ok, I just checked the catalog again, I found a 508/508 lift with 249/249 duration at .050, would this be a better cam ? what kind of hp would I make with that ?

Originally Posted by 86camaro

ok, I just checked the catalog again, I found a 508/508 lift with 249/249 duration at .050, would this be a better cam ? what kind of hp would I make with that ?

For a comp. ratio of around 9 to 1 I would look at cams that have a duration at .050 of 230 or less.

you know,if your dead set on that camshaft, you should just save your pennies and get a nice set AFR's or Trick flow heads. you can get 10.5:1-11.0:1 compression with aluminum and also they flow enough to support that type of camshaft. your combo right now, is totally out of whack. a camshaft is as only as good as the heads are. if aluminum heads is out of your price range, then use your iron heads and put a camshaft under 230 duration @.050 and go from there,and if i were you i would use every bit of information from us, because it will increase your chances of having successful engine. good luck on your build!

if want the big cam sound get a cam that works, it'll still give you a decent sound.... and just make it idle like crap by adjusting the idle screws totally wrong... it'll still run fine as soon as you leave the idle circuit.... but it will idle horribly and give that big cam sound

I think the engine will work fine with the cam I chose, I talked to the guys at the local racing parts shop, and I found out that there is a class of circle track racing that uses almost the exact same engine setup as mine, hobby stock class is limited to using production 76cc heads, 9-1 maximum compression, maximum 361 cubic inches, and he said the 508/508 lift cam I was looking at is the best one for that setup, it even noted that in the catalog that, and it's what most of the guys use, he said if I found some 305 heads with smaller combustion chambers that my compression would be upped to around 10.4-1 and the first cam I was looking at, the 530/542 lift would be the better choice, but if I stick witht he 350 76cc heads with the 9-1 compression, the 508/508 will be the better choice.

Originally Posted by 86camaro

I think the engine will work fine with the cam I chose, I talked to the guys at the local racing parts shop, and I found out that there is a class of circle track racing that uses almost the exact same engine setup as mine, hobby stock class is limited to using production 76cc heads, 9-1 maximum compression, maximum 361 cubic inches, and he said the 508/508 lift cam I was looking at is the best one for that setup, it even noted that in the catalog that, and it's what most of the guys use, he said if I found some 305 heads with smaller combustion chambers that my compression would be upped to around 10.4-1 and the first cam I was looking at, the 530/542 lift would be the better choice, but if I stick witht he 350 76cc heads with the 9-1 compression, the 508/508 will be the better choice.

That might be true but now we are comparing apples to oranges.
The circle track cars you are talking about run a lot more gear than you and their car is already moving and they weigh a lot less.