289 build

mrmustangconvert · 05-11-2007, 03:06 PM

well since i got the 84 mustang out of the way im now going to start on my 66 stang now. so far i have a 289 motor that is a c8 casting, it came with a 2bbl from factory with 8 to 7 compression. right now im looking for forged piston, rods, and crank kit that has a 10/5 compression, if i can get away with it ill keep the stock crank to save a little money. but i looked in the summit catlog and the smallest kit was a 306, im shure that they have the kits avalable but i dont know where to look. also i dont know what the best company to go with. plus i want to keep the stock displacement if possible.

coupe · 05-11-2007, 03:11 PM

If you're not looking to make HUGE horsepower, the stock rods and crank are not bad at all. I would consider having them checked, possibly recondition the rods, and get a set of pistons for it. That thing would purr like a kitten.

There's alot to be said about keeping it 289 cubic inches. I like the idea.

Summit probably won't help you much on this project.

LeeH · 05-11-2007, 09:48 PM

302 pistons will work in a 289, The difference in stroke is made up with the connecting rod length. The compression height of the piston is the same(1.60 nominal) but the rods are 5.155(289) and 5.09(302). The stock 289 rods and crank are plenty strong for any street car.

86nu · 05-15-2007, 05:31 PM

nothin beats winding the piss out of a 289, Dad had one when I was younger, seemed like he just revved and revved and revved that thing and it never NEVER missed a lick

Wall96cobra · 05-15-2007, 05:50 PM

Hey I have a new still in the box comp cam (270H) for a 289 if you're interested. I bought it years ago for my old 67 fastback but sold the car before it was finished like an idiot. Anyway if you want it I'll take $50.

05-11-2007, 03:06 PM	#1
mrmustangconvert Senior Member Join Date: Oct 2006 Location: at your moms Posts: 407	289 build well since i got the 84 mustang out of the way im now going to start on my 66 stang now. so far i have a 289 motor that is a c8 casting, it came with a 2bbl from factory with 8 to 7 compression. right now im looking for forged piston, rods, and crank kit that has a 10/5 compression, if i can get away with it ill keep the stock crank to save a little money. but i looked in the summit catlog and the smallest kit was a 306, im shure that they have the kits avalable but i dont know where to look. also i dont know what the best company to go with. plus i want to keep the stock displacement if possible. __________________ 13.068 @ 102 with a 1.732 60 ft, 4:30 gears and drag radials, 2.5 inch exaust, x pipe w/ flowmasters, stock motor and trans

05-11-2007, 03:11 PM	#2
coupe Super Moderator Join Date: Dec 2004 Posts: 6,313	If you're not looking to make HUGE horsepower, the stock rods and crank are not bad at all. I would consider having them checked, possibly recondition the rods, and get a set of pistons for it. That thing would purr like a kitten. There's alot to be said about keeping it 289 cubic inches. I like the idea. Summit probably won't help you much on this project. __________________ " If you can't explain it simply, you don't understand it well enough. " - Albert Einstein

05-11-2007, 09:48 PM	#3
LeeH Senior Member Join Date: Dec 2005 Location: The conservative underground Posts: 341	302 pistons will work in a 289, The difference in stroke is made up with the connecting rod length. The compression height of the piston is the same(1.60 nominal) but the rods are 5.155(289) and 5.09(302). The stock 289 rods and crank are plenty strong for any street car. __________________ 89LX Hatch 89LX Coupe 89GT 90GT 93GT

05-15-2007, 05:31 PM	#4
86nu Senior Member Join Date: May 2007 Location: orlando florida Posts: 165	nothin beats winding the piss out of a 289, Dad had one when I was younger, seemed like he just revved and revved and revved that thing and it never NEVER missed a lick

05-15-2007, 05:50 PM	#5
Wall96cobra ooooo cake!!! Join Date: Dec 2004 Location: Saks, AL Posts: 1,630	Hey I have a new still in the box comp cam (270H) for a 289 if you're interested. I bought it years ago for my old 67 fastback but sold the car before it was finished like an idiot. Anyway if you want it I'll take $50.