What would that give you as far as ci? Can you get the 350 pistons in there without boring over .060? And, what are the 289 rods compared to the 302...I figured they were the same rod.
would still be a 302. stock 302 rods are 5.090. 289 rods are 5.155. The longer rod will keep the piston at the top of the cylinder longer. for better combustion.
5.090" rod divided by 3.00" stroke = 1.69:1 rod/stroke ratio 5.155" rod divided by 3.00" stroke = 1.72:1 rod/stroke ratio Been there, built that, liked the t-shirt.
I used a stock 80,000 mile 1991 5.0 engine home ported e7 factory heads b303 ford racing cam,performer rpm intake,600 holley carb [for now] t5 mustang trans,headman headers,2.5 exhaust,3.89 gears.I have always built Big Blocks,this is my first small block and all i can say is this thing pulls hard,and gas milege,i've averaged 24 mpg not babying the car.I'm very pleased.Derek.
If both use a 4" bore, then the chevy 350 is just a little more stroked than the ford (about like the 347)? I never knew...in fact, I have a hypereutectic (sp?) 350 piston on my desk at work as a paperweight (blew up on it's first race within the first 5 miles, so it is really clean). I never paid much attention to how big it is compared to a 302.
I'm interested about the 289 rods, thanks for the info About the 351C and 351W, which cars (or trucks) commonly had these engines. Maybe I could bargain the heads and get a reasonable price. I just want to know if they're good, just in case. thanks
If you use the longer rods you have to use a piston with a lower compression height - thats why the 350 piston is used. I would have to look it up to see if it is the right height or not. You could leave your stock pistons in place and have them cut down but that would cause holes in the pistons because you would weaken the tops by shaving them.
When I used this combo I used KB pistons. BUT when you order the pistons you can't just call up and order an off the shelf set of pistons. On the Chevy 4 cylinders have the int. & exh. valves reverse from that of a ford. You will need to order 8 of the ones that the valve releafes correspond to the ford configuration. The 289 rod and 350 piston will put the piston at .000 to +.004 deck height.
350 is 3.48" stroke x 4" bore and 1.5" compression height. 302 is 1.6" comp height. Using the shorter piston, you open up .1" for use with extra stroke or rod length. The really good part is that being Chevy, manufacturers make seemingly unlimited numbers of variations that can be had right off the shelf. And cheaper than anything for a Ford. You can get numerous comp heights, piston materials, domes/dishes, etc... With some imagination and math skills, you can adapt them to most any rod/crank combo you can think of and maybe save a bit of money if you shop smart. It has been a long time since I have studied the available combos, but there is a common piston that can be used to put a 5.4 rod in a 302. It is even possible to use a 400 SBC rod in an SBF if you are brave. 5.595" length. Dave
for the 289 rods/350 pistons the only mod that needs to be done is to the piston pin end of the rod. all that has to be done is resize of the end to fit the larger pin from the 350 piston. if your block is .010 overbore you will need .010 over 350 pistons no extra block or crank mods needed.
