Thread: Any website that calculates HP?

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Anyone know of a website that will let you list all the components of an engine build and give you an estimated horsepower number? I'm not building a race car but I have two different motor combinations I can go with (basement full of parts) and would like to get a 'in the ballpark' idea of what the 2 combo's would do because,though it'll be a far cry from a race car or even considered a hotrod,,,,I don't want to be out ran by just anything!
And before I get my chops smacked,,,,(i know I will on this one but also know that this is the site that will give 'real' info) let me say that due to limited green,I am forced to use what I have.Looking for a site with calculator and not really what others would use instead of what I've got
edit: guess I should add that the choices I have to choose from will produce different power ranges but would like to stay under a certain HP but over a certain HP #,thus the request for a calculator.

post the combo's and i will e-mail tham to a friend that has a few of those dyno programs.. and post them up for you may take a day or so...

Well,,,combo #1,this is what I'd like to go with if it would move a 3100-3200 lb vehicle into the low 15's in the quarter.Not sure of all you need but here goes,
283 bored .060"=292 c.i.'s.; right about 9.2:1 CR with the pistons and heads I have,these heads,though production 'smog' heads do work on fast NHRA stock & superstock cars;cam 447 lift,306 duration 114 lsa;Offy intake with 600 Holley;
Need more let me know.Weakness in this is build is C.I. and heads but again,,,low 15's
And by the way,rear gear will be 411 and converter around 2300 stall,but I can change that depending on what HP I'll have.

fisrt were do i get a horse that works on car???? do you have any flow number ?? do you have the cam card?? the lsa doesn't tell me anything i need the event timing numbers. there the ones on the card that say ivo? ivc? evo?evc? if you have those number that and the lift you posted is all he will need as for cam spec's. is that a duel plane intake??

A stock 283 with any mild cam should get you in the 15 second range. My std bore 283 in a 3400lb car with me in it ran 15 sec with 3.55 gears/4 speed and a cam with about a .470 lift. the 600 holley is perfect on mine, it does better than the edelbrock 600 I had. Put together what you have and run it, it's already paid for. If it is not working right you can easily make a cam change latter.

Intake is a high riser dual plane.Offy 360 design;cam specs,@ .050 In.-1/41,E.-49/7;advertised In.40/86 Ex.88/38
Some flow #'s lift cfm
350 170 In/105 Ex.
400 182 /107
450 189 /109
500 195 /110

~300 HP at 6,500 rpm. Will make ~300 hp from ~6,000 rpm out to ~7,000 rpm with dual plane manifold and street headers/mufflers.

I think it will run ~ 14 sec

Kitz

you should be fine for what your looking for like mr kitz says its around 300. the only thing i would strongly suggest. if your could go to a 1.6 rocker this will give you .477 lift and make alittle more hp for free. and the next thing your going to think i'm crazy but i would put a 8-9" convertor 4500-5000 stall. you can get a hughs from jegs that will work well. the converter will NEVER go that hi with the power you making more like 2800-3100. i have a 8" hugh in a 350cid pump gas 10to1 same gear, weight with about 100 more hp but it only goes to 3500rpm and it advertised as 5000.. it would go there if you were to run a 600-700hp engine.. just remember the smaller cid and lack of torque you will need a smaller convertor and alot higher advertised stall speed. your going to have to trust me on this one.. just alittle info we pulled out a 5000stall from behind a 496 bigblock because the stall was going 5900 and installed it into a 454 that made 200hp less and it would only go 4700. we were looking for a home for it and final put it in a chevy power mustang with a small block that made 180hp less then the 454 and it would only go 3600. so as you can see the converter went over the advertised stall all the way down to 1400 under advertised stall..

Thanks a million guys. But I have a question(I'll show my ignorance on this one) but,this cam supposedly lets a motor 'flaten out' around 5500 rpm,and so would these heads I think. 500caddy,I know to use a little more converter than the cam needs, but 4500-5000 stall? I'm not questioning your experience,and I don't know alot but are you baseing that on the rpm potential due to it being a small cubic in.motor or??? Please explain.

I do like the idea of 1.6 rockers. One thing that captures my attention is we haven't been told what heads you have and valve size. I know you said they ran well on stock and super stock engines. Does it have 1.94 intake valves or 2.02's. Increasing lift with the smaller bore 283 (+ .060) can experience shrouding and possible material contact depending on the chamber size and valve size. If the valve will not interfere when open, consider shrouding and if it may pose a problem for your application.

Heads are as stated 'smog' heads and if I would make any changes it would be here. They are 305HO '416' heads,1.84 in.,1.5 ex.,58cc chambers,,,yeah I know,,,YUK! Not a good head for a hipo build but I can't see why they wouldn't flow enough to get a 3200 lb. vehicle in the low 15's.
They have been used on NHRA stock and SS cars with some work.

My heads are off of a 305 1981 chevy truck. They run as good as the 1.94 camel humps that were on it.

Originally Posted by chevydrivin

My heads are off of a 305 1981 chevy truck. They run as good as the 1.94 camel humps that were on it.

I heard others say the same thing,that the 305HO heads are as good as 1.94 camel humps and Hotrod mag.printed a reply to a question I asked in the June 06 issue,'pit stop' section,pg.161 and said that these '416' heads have 350 head intake runners with a higher compression chamber.
But they ARE NOT what anyone would consider a hi-performance or hotrod head,but are decent for a daily driver needing a little more compression do to the wrecking yard charging less than the machine shop or aftermarket.
But again,if I were serious about making power they would be the first thing to go.

Originally Posted by FAYLUR

Heads are as stated 'smog' heads and if I would make any changes it would be here. They are 305HO '416' heads,1.84 in.,1.5 ex.,58cc chambers,,,yeah I know,,,YUK! Not a good head for a hipo build but I can't see why they wouldn't flow enough to get a 3200 lb. vehicle in the low 15's.
They have been used on NHRA stock and SS cars with some work.

Down to 287 hp with those heads ..................

The HP is very flat from 5500 to 7500 but I don't think that will help you that much drag racing. In addition you need really good springs and lifters or you will float your valves well before 7,000 rpm ...........

Kitz

Well my heads had been rebuilt and had new stock springs installed. My engine runs up to 7,000 with no problem, Ran 6,200 rpm through the traps with my 3.55 gear. Now with my 3.7 gear i hope to gain a little more rpm.