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STROKIN A 350????


Guest Anonymous

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Guest Anonymous

tell me would i be better off with stock crank and push rods or should i swap them for the 305 crank and push rods i have???? i know i will git more RPM out of the 305 crank but wont i lose torqu??? just wondering

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Guest Anonymous

" Some cast, 2.45" main journal, 3.48" stroke, two piece cranks have the same casting #(3932442) but are balanced differently. Cast cranks used on 267,305, and 350 motors should not be interchanged from one engine size to another because of possible balancing problems, even though they have the same stroke and will physically interchange in medium journal blocks." Ed Staffel, Small Block Chevy parts interchange manual. I also don't see how pushrods are involved, maybe connecting rods? I hope I was able to help.

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My $.02

Short stroke = higher revs, higher POINT at which peak HP and Torque are made

 

Long stroke = lower revs to make HP and Torque, lower RPM of peak Torque

 

I know I'm missing some here but:

engnes with 3.00" stroke are 265, 283 and 302; 3.25" stroke are 307 and 327; 3.48" stroke are 305 and 350 and 3.75 stroke is the 400.

 

4" bore engines are 302, 327 and 350.

 

If you want R's put a LJ 327 crank or a 307 crank in a 4-bolt 350. If you want torque put a 400 crank in a 350 block (383) but don't waste your money (regardless of magizine articles) by putting a 400 crank in the 305 block (335)

 

Longer rods (connecting not push rods, right?) have advantages depending on desired results, but I'll let an expert touch on that.

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Guest Anonymous

Peternell is right. More rev's, less stroke and vice versa. The long rod versus short rod is a long, complicated theory. Long rods fool the cylinder head into thinking that it is bigger than it is by having better cylinder fill and more dwell time at TDC and BDC giving you more airflow potential. Yet, there is a large group that likes to use short rods for different rpm ranges and cylinder head choice. I read an article in Circle Track a ways back and they were comparing engines for restrictor plate use and Martinsville( a very short corner with relatively long straights and 9000+ rpm engine speeds) Under anonymity(?) some engine used long 6.00+ rods and some used short 5.4 or less rods, in both kinds of engines. Another way to look at is to figure out rod ratio. This can be found by dividing the rod length by the stroke. i.e.: 6.00" rod, 3.00" stroke equals a ratio of 2:1. 5.7" rod, 3.48" stroke equals a 1:64.1. The first combination will rev higher and cause less stress to the rotating assembly. Smoky Yunick says it best..."use the longest damn rod you can fit in the engine!!" More on this later, I've got more reading to do... icon_wink.gif

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Larry and Jason just gave you the correct advice--you can make a good informed decision based on that. Also, what will you be using the car for mostly? That should have a large bearing on your decision making process, of how radical of an engine you want to produce. Keep in mind that the larger your cubic inches, the larger the cam you can run and still be streetable. Just food for thought.

 

Davy

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And to add to what DavyZ said, These light cars just can't use a lot of grunt on low end. once you get established on a run, I've found that a torque range that peaks on the high end is more "useful" than one on the low end (again, for spirited street racing).

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Guest Anonymous

in responce to dumb ass post i think you know who im talking about

 

 

i cant beleve that dumb ass a 305 327 and 350 are the same cep bore and stroke and yes a 305/327 cam will fit in a 350 and is a shorter stroke dumb ass i was asking people who know more than me like what i might end up with not you telling em i cant do somthing i know i can

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Guys, am I missing something here? Is there something in the water? Has Bin Laden actually spiked the water which is turning people into trolls????

 

Unless I am completely mistaken, and forgive me 82racecar if I am, but YOU ASKED FOR INFORMATION, and Jason quoted a reliable source for you. I have reread your post and cannot figure out how you seem to "know" what you can and cannot do, yet you post the question anyway. You apparently have no idea about what the spirit of this is supposed to be. If I have misread your post, I am truly sorry, so please use puncutation next time.

 

Have a nice day icon_smile.gif

 

Davy

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Guest Anonymous

Oh and by the way 82dipsh!t, do yourself a favor and go back to elementary school... There they might teach you how to spell. While you're at it you might as well pick up a basic grasp of grammar and punctuation. Then again that might be asking too much of your room temperature IQ. Have a good day.

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OK Guys... This has gone on LONG ENOUGH. Keep the language in check and NO NAME CALLING. If it happens again people WILL be banned, no exceptions and no excuses. This site WILL NOT TOLERATE THIS. Re-Read the mission statement and make your decisions to stay or go, but be polite in doing so.

 

Mike Kelly

Administrator

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Mike, you'll never hear me swear, but I do get irritated at such displays of complete and utter disregard for accurate information--for goodness sake, Jason quoted a reliable source. I do my best at staying civil and enjoy the maturity and friendliness of this site. Getting slapped in the face after being nice to someone is not my cup of tea, but I will always try to stay civil in my posts.

 

Long live HybridZ icon_smile.gif

 

Regards,

 

DavyZ

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Guys,

I'm in 100% agreement. You guys were provoked and It was wrong. However, We have got to get a handle on it. The individual that started this thread has been contacted, and I'd appreciate all of you guys keeping your head. I'm locking this thread and if any of you want to e-mail me offline to discuss it, please do!

 

Mike

 

[ October 23, 2001: Message edited by: Mikelly ]

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