Alexes parts has them for around $110.00 for all. Buy a 1.78 intake and 1.46 or 1.56, undercut, swirl polished stainless valves. " If you want to modify the heads, here’s one suggestion that I do. 289 hipo for sale professional#If your combustion chambers are too small, you can have them enlarged a bit by a professional head porter. I would not run dished pistons as this reduces the quench which can increase the potential for detonation. If the engine is apart, you can have the block milled so the pistons are within a few thousands of the top of the block. Also, using a head gasket that is the same id as the bore might help a little. If the pistons are below the block surface, you can run a thinner head gasket. 042” of clearance between the top of the piston and the head. You can run around 9.7 - 10.0 static compression with iron heads with proper ignition timing and engine cooling and gearing and premium gas, however, one trick to doing that is running between. If the right seats are used, they will not hit water either. Neither the opening if the stock seats or blending the bowls will run into water. 289 hipo for sale install#You can install the 1.78 and 1.56 valves in the stock seats or you can install seats if you want. I use titanium retainers from Doug Herbert racing. 250, then buy short lash caps and use those so the top of the stem doesn’t get beat. If the tips of the valve stems are longer than. If you want to modify the heads, here’s one suggestion that I do. In other words, you will get more flow with stock valves and ported heads than you will with bigger valves and non ported heads. If you install a bigger exhaust valve the entire exhaust port should be ported, otherwise you will not get much benefit from the bigger valves. As far as installing bigger valves goes, the bowls need to be ported if you do that. You can have your cylinders checked for thickness but some shops charge around $200.00 to do that. 040 over, I would definitely never bore a 289 to. As far as the block goes, if it has a core shift or the cylinders are very rusted on the inside of the water jacket, it might run hot at. If you do other mods, you might want 3.73 gears etc. In other words, I wouldn’t put a roller cam or hydraulic cam or something like that in it then use an aftermarket intake. To me, the whole point of having a factory hi po is to have it run similar to one and look like one or look like a Shelby with the Shelby intake etc. Sell it, and get a crate motor and be done?Īny opinions/comments appreciated as you may mention something I haven't even considered in my decision. So what do my fellow Classic Mustang aficianados think? I know rebuilding engines today isn't cheap.) I've had this engine in the garage for almost 20 yrs, and now I find myself torn between wanting a running HiPo, for nostalgia and traditional reasons, or just using a 302-based crate motor an be done with engine concerns, (and maybe sell the HiPo, or its parts, to offset cost of the crate motor. As best as I can tell, the block and heads are casting number, and date-coded around the same time. I don't know if it can be cleaned up at only. That's pretty small, and I've yet to find out any information on whether the early heads will allow any larger valves, whether they be the later 1.78" stock valves, or 1.94" intakes that later heads can accept.Īnother concern is that the block bores are already. Depending on what I read, the stock CR for that engine is between 10.5-11.5 to 1.Ī second concern are the 1.67" intake valves. I know I'll have to probably use stock-type, or custom, dished pistons to get the compression ratio (CR) down so that it will run on today's pump gas. This is an early, 1963 289 HiPo (HiPo's came in Fairlanes and Comets that year), with the smaller combustion chambers and smaller intake valves. One of the things with the HiPo that is a concern is the compression ratio. I'll be giving the car the Shelby look with the wide, over the top stripes and side stripes. Other than the fact that it was my wife's father's car when she was a kid, there's nothing unique about the car. I'm restoring a red 65 Fastback, originally a 2-V car with factory disk brakes and AC. I find myself procrastinating on whether to rebuild a 289 HiPo motor that I have, or to buy a crate motor to use.
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