347 stroker = how much hp?

my understanding is...you are having "someone else" other than yourself build it...
you can get a ...crate engine... with...500 FWHP...
either way someone else is building it...

......

 

did you build yours , what HP are you running .crate engine companies arnt offering a NEW Boss 347 with a heavy cylinder walls and 4 bolt mains for a way ,way stronger crank , I was just told today that the new Boss 347 pushed 500 hp and a 300 shot of NOS for 800 hp and stayed together .Im building it by choosing the parts i want or have already bought Cam Heads ect,ect and hoping to get my 480 hp 4 weeks and it will be dyno tesrt time

 

Boss 347 stroker show race car , ET 10:60 on pump gas or bust ,thats my goal and if that wont cut it then i already have the intercooled turbo set up for 2010 season thanks for the help Stephan Moore .This is a realistic goal, P.S ,whos splitting hairs

 

crate engines are just so impersonal. theres something to be said about being able to shake the hand of the person who is building your motor. there are alot of areas druring a engine build that need attention to get every last avaible pony out of and I just dont feel that crate engine builders are puting that level of detail in to them.

 

Some are.....it all goes back to "you get what you pay for"

 

I'm curious to see how your build goes. I too am building a 347. (having the short block built)

I myself cannot be called a builder as there are many aspects to building the motor that the layman with basic hand tools cannot/should not do if you are expecting to get the best possible life and power out of it. There are just too many aspects to being a builder that can only truelly come from someone with that experience. But there is a difference in having a motor built and buying a crate motor just as there is a difference in buying a completed car versus buying a beater and making it the way you want it. There is pride in knowing that you had a hand in making it your own and not just picking out a number in a catalog and saying give me one of those. Trust me if I had the skill and knowledge to build it myself I would. But if you've read some of my other trouble posts you'd know I have neither. So there you have it... Theres builders, theres buyers and then there are those of us who fall somewhere between.

BTW. Any bit of knowledge I do have comes from the fine folks in this community and trying it myself. Thanks for the help and experience guys.

 

GrabberGT .I agree with your post ,hell i have a pretty good shop ,most of the things a guy would need to race ,ie parts wash tank ,12 ton bearing press, 5 foot laith 5 hp compresser ect ,but im no machinest that will make sure my clearance of .0025 is on ,i would fail that side of the build for sure .I could put this engine together , yes i do have a really good torque wrench , why not leave that part to the pros . I also agree with you on the knowledge here ,but there are some with a much larger knowledge of certain things than others and thoughs are the ones that you keep your mouth shut and your ears open when they talk. Just my 2 cents

 

and..."crate engines are just so impersonal".

"There is pride in knowing that you had a hand in making it your own and not just picking out a number in a catalog." (so how did he get the parts he took to them)

if they don't reach your #s...."you took them the wrong parts"...you can't point your finger at them...

with a crate motor...you just bought all the right parts to make a certain...HP/TQ. no guessing...this cam will work with these heads...this intake w/this carb...so-n-so said "this or that"....JMO

i bought all the parts for my build...had the machine work done (to my specs.) took it all to a shop and had it put together (cam set at my specs.)...did i "build" my motor ?...

i didn't..."Shut-up and Listen"... because i wasn't interested in learning how to build an engine...i cleaned and painted parts...something i know how to do...

...:Handshake...

 

You would think that TL was on the board in this thread somewhere! I get the impression that everyone is taking this rather personally and I'm not sure why.

Truth be told, there is a difference between a builder and an assembler. And as far as the crate motors go, you get what you pay for. The advantage to a crate motor in my mind is that it's all new parts. Most of the builders and assemblers work from cores. Is one better than the other? I feel that a crate motor is not much different than purchasing a production line motor (take offense if you will, but it is not intended) albeit a higher performance version since it doesn't have to meet emissions and such. I compare it to buying a suit off a rack vs. buying one that is tailored for you. You get something that matches more of what you require (and have more control over how much you spend). I also think that matching parts in a build is not black magic. If you start out with your goals in mind and build to that specification and match parts to those specs it is not all that hard. The information is out there and there are many people and companies (Edelbrock comes to mind immediately) willing to help and to show you how to achieve your goals. There is a certain amount of experience that helps you build a reliable motor to meet these goals that an assembler just just doesn't have (why a certain motor came apart at a certain rpm with certain parts at a certain clearance). But I ask, how many people build 40 motors a month to get this experience and knowledge? I build one every couple of years myself so I consider myself an assembler. The failure rate is more of a concern to me than making the HP. I feel that making the numbers is relatively easy, reliability on the other hand...not so easy! I personally don't build a motor for a hp goal...I build it with an ET in mind and the parts fall in place from there. I do feel that many HP numbers are way overinflated (in the magazines and in peoples minds) and at the risk of offending someone, very unrealistic in many cases. I see so many people let down when their magazine build engine with just bolt ons doesn't reach the HP goal when it actually see's a dyno. As a side note torque in my opinion is a much more accurate yardstick for measuring power.

In the end take a look at what it takes to put a car in the 10.60's in the quarter mile. I will use the Fox bodied Mustang as an example since I see so many of these in AZ running 10's. Most claim to weigh 3400lbs. Using the formula hp=(5.825/ET)cubed X vehicle weight you get an uncorrected hp of 572. I would argue that that making this kind of hp is not as difficult to make today as it was 20 years ago. This is evidenced by the number of cars running 10's today as compared to the 1980's.

So anyway, take all this for what it's worth. I just thought that I'd chime in with my thoughts on the subject.

Oh and one last thing, you can have all the horsepower you want, but if you can't get it to the ground...it's as useless as grandma's car!

 

Thank you MNTony, i approve this comment, bottom line is ill be parting with 8 grand next week for a awsome engine and what ever i get for HP and and hopefully a ET of mid to low 10s in the quarter mile ill have to live with for a few years . Any how ,what ever i get will be fast enough for me to have a lot of fun at the track and on the street. I cant spend more than 8 grand on engine as i also promised Bev Grabbergirl719 i would do a complete show car resto this year on her 71 grabber and im starting hers rite after my new engine is back in my car next month . cheers friends

 

Frank it would seem to me that your reply has a bit of a loop hole....
"YOUR" specs yet you claim to only know how to paint
now that's funny right there no matter who you are

You guys crack me up

FFL when he lets me that is.....:Handshake

 

...I'm just trying to follow this thread...

09/22/08... "Well folks ,ive been buying high end parts for a year now to build my next street/strip engine . Today I took all my parts to the machine shop that will build my engine .Im useing a 1968 mexican 302 block."
" i wont be happy with less than 480 hp,end of story.",

09/23/08..."just put my order in for my brand new 302 boss 4 bolt main block to start my build ,480 hp here i come."

09/24/08... "347 stroker show race car , ET 10:60 on pump gas or bust ,thats my goal."

09/26/08... "bottom line is ill be parting with 8 grand next week for a awsome engine and what ever i get for HP."...

...i'm just trying to use this build as a guide to building a "347 stroker"

it goes from...Mex. block to 302 Boss block...480 HP...10:60 ET

to the last post ..."8 grand and whatever HP"...

maybe you could edit the thread for me (us) and update it on what parts used at this point...

...:Handshake...

 

Do you see... "ONLY" ...in front of..."know how to do"?

FFL...(at the moment)

 

Naw I know you old guys have lots of XP

 

Not to chime in unwanted, but I have to agree with frank. I am as well confused about if you have already placed the parts there, and are waiting to pay for it, or are doing it sometime in the future, as well as, the boss vs. mexican block... HOWEVER, i dont really care about the specs. I'm not here to start anything with you either, This is your thread, and treat it how you want.

Now, with that said, when you first asked for opinions, you didnt ask "specifically" for a professional racer w/ a 347 high output engine to chime in, you asked "what do you guys think"....So thats why I posted a reply. I dont care if you think I have no professional, personal, or all around general experience, It pissed me off how you put it. But, I digress... I just replied because you said if you didnt get 480hp you werent going to be happy. Now, at first I'm assuming you wanted 480 at the Rear Wheels from a chasis dyno. Thats why i posted what I did.

Assuming a 18% powertrain loss through an automatic trans, and we could be conservative, so i'll go 12% for sake of argument.... So, 12%. Again, we know what assuming means, but lets assume you get 480 flywheel HP. 480 x .12 = 57.6
Then we'll take 480 - 57.6 = 422.4 assumed RW HP. So you can see how to get 480 RW HP, you need into the 500's to achieve your goal. Some will say an automatic can take up to 30% powetrain loss, but I pretty much halved it just because.....
530HP+ is attainable to get your 480 at flywheel, I was just stating that I hope you get your numbers, however, with your parts, you may not...

Now 480 flywheel is certainly attainable with the supposed parts and running electric utilities, I.E. - waterpump, fuel pump, and an electric fan. and if that'll make you happy, then awesome. Thats basically in a nutshell what i was trying to explain. No hard feelings.



Also,

FRPP does, its rated at 450 flywheel HP from jegs, but has rear sump youd have to change over, and the flywheel. http://www.jegs.com/i/Ford+Racing/397/M-6007-Z347/10002/-1 plus, it's out of the 8,000 range you wanted.