I wouldnt mind a 350 but im restoring it, the 300 and the st300 are original. besides it will probably never see the track, its just a cruiser.
Ah, I see. My apologies for assuming you were looking for more power. Yeah, the Summit cam will be fine. Its a stock replacement with a little more lift. Sort of a small "RV cam". But if all you're looking for is a stock replacement, call around to some of you local auto shops and see what the price is for a stock regrind. Last time I got one it was only $25 and they're just as reliable as the factory original. If you want a small "kick-in-the-pants" without interfering with the drivability of the car, you could inquire about an "RV" grind from the same manufacturer. Bob
My mistake. I've had a 225 and several 300s over the years. It's just been so long since I was involved with old cars I forgot my formulas!!! lol! If I understand this right, it should be 3.78 (3.75 + .030) * 3.4 * 8 * 3.14 = 322ci. Well anyway, a fresh engine will be much better than an old, tired engine and I'm not racing mine.
Not 322, 305. What you're doing, when determining engine displacement, is factoring together the combined volume for all the cylinders that make up the engine. The way to do this is to determine the volume of one of the cylinders then just multiply that by how many cylinders your engine has. There are two ways to determine the volume of a cylinder: "Pi R squared times the height, times the number of cylinders" or "Diameter squared, times 1/4 pi, times the number of cyliinders" This is how the forumula's work to determine the displacement of your motor: Pi=3.1416 3.75 + .030 = 3.78 (one of the cylinders, bored out .030") 3.78 / 2 = 1.89 (radius of the cylinder) 1.89 x 1.89 = 3.5721 (radius, or "r", squared) 3.5721 x 3.1416 = 11.22210936 (the surface area of the cylinder) 11.22210936 x 3.4 (engine's stroke) = 38.155171824 (displacement, or volume, of the cylinder) 38.155171824 x 8 (number of cylinders that comprise the engine) = 305.241374592 (total displacement of the engine) -------------------------- 1/4 pi = .7854 3.75 + .030 = 3.78 3.78 x 3.78 = 14.2884 14.2884 x .7854 = 11.22210936 11.22210936 x 3.4 = 38.155171824 38.155171824 x 8 = 305.241374592 cu.in. Use either one you wish. Bob
...or... You could simply remember the following: 350, 30 over = 355 350, 60 over = 360 If you run the formulas in my prior post, you'll see that applies to any V8 engine displacing between 260 and 400 cubic inches. Bob
Its cool bob. But I'm in the proccess of rebulding the motor right now, and after some suggestions I'm going to throw the poston 110a in it and do up the valve train. I just wanted to keep the stock block, heads and stuff I am looking for power just not in form of a motor swap. Thanks
I accept all help or suggestions, seeing as this is my first buildup ever. I just need help. Can anyone point me in the direction of a manual to rebuild the 300. Thanks
The 1966 Buick Chassis Service manual gives a detailed description. You can find them on eBay for $20-50. It's a great resource. You'll like it.
Hopefully you find this helpful... http://www.buicks.net/shop/reference/specs_300-340.html ...as well as this... http://www.buicks.net/shop/reference/torque.html (scroll all the way to the bottom, then go up one. That will apply to your engine). You know, I think you've changed my mind about the 300 as well. I've spent years only liking the 350, but I can now see the 300 as a cool little cruiser, with a glassy smooth idle and the most silky of exhaust notes. Thanks for helping me appreciate that. :TU: Bob
That is some good info, Thanks Bob. I always thought the 300 was cool, ever since my brother brought it home i wanted it, now I get to tear it down. The only thing I dont like is the 2 speed. If I put 3.23s in it, man I just dont have enough gears.
Yeah, but you could still do 50 in first! :3gears: (that was a little thing a guy I knew used to brag about with his Mustang). Well, the engine sounds like its going to be mild enough, maybe you could get away with a Metric 200 or the OD version. Either choice will allow you to pick up an extra gear without gaining too much weight. 3.73's + 200-4R = first gear very similar to TH350/4.10 (so it'll really launch) and your 60MPH cruise will be around 1850 RPM. 3.23's + Metric 200 = better gearing than TH350/3.42 and 60MPH cruise will still only be around 2375 RPM. (both calculations assume you retain the 275/60-15 tires you're using now) BTW, I did a little HP/cu.in. math, while I had the calculator out. If you run a stock 4-bbl intake with dual exhaust and use the Poston cam, you should realize a little over 190HP when you're done (stock would be around 150-155). That works out to around 18.4 lbs./HP, based on a 3500 lb. curb weight. That's not bad and with the gear change, probably a lot of fun to drive. Bob
Ok, sorry, I told you it's been many years since I did the calculations. Thanks. That's why I should leave the numbers stuff to guys like you. I hate math!!!!! :eek2:
That dont sound too bad. Oh yah the wheels and tires are the only thing not stock. It has SS Cragars 14x7 up front and 14x10 out back.:Brow:
darkstar, Not a problem. Only the drive wheels are going to affect the engine speed (or is that visa versa?). I thought you stated earlier you were running 275/60-15's on it. Sounds like a bitchin' ride. You'll have to direct me to, or post, some pics of that car when you get it finished. ----------------------------------------------------------------------- gui-tarzan, No apology needed. You seemed adamant that a .030" overbore would result in a larger displacement than that of which I stated, so I was simply showing you how I came to that conclusion, and refreshing your memory on how to calculate engine displacement at the same time. It's all good, man. Bob
Not yet, still pullin stuff apart I only get time to work on it over the weekends cause of work. But Its comin along.
Hi Guy's, It's been awhile. JoeyGS has started a thread on hopping up the little guy. Too bad there isn't a way to transfer these post's over there. A lot of good info here and NOBODY uses the search function. If someone ask's a question that's been answered Three times already, someone will answer. I picked up a '67 / 340 and hope to get it into my '65. Put my 300 Heads and exhaust manifolds on it. Cam and all the other little stuff I did to my 300. Plus paint it Turquoise and put my 355 air cleaner back on it. I have a 600 and 750 Edelbrock carb set. I'll probably stick with the 600. Try the "DOC" intake trick. I've got a few 4 Brl. Manifolds for the 340. They're not as expensive or rare as the 300 intakes. So if I mess One up it's ok. Well, not really. But a 300? OH NO! I have One that I ground all the "Machine Bumps" off of it. Made it nice and smooth. Look's great. Did the same thing to the 350 intake on my car now. It look's a lot better than a stock One with all the extra stuff sticking up from it. Hey, enough. The medication is taking me too far. I'll try to chime in later. PONCH
Ponch, What is the "DOC" intake trick? New to me. ------------------------------------------------------ Its been 3.5 years since Darkstar asked about the cam? My, how time flies. DARKSTAR - what's the latest with the car? Can you post pics of it yet? Bob
