aftermarket pistons
Senior User
Joined: Aug 2007
Posts: 388
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From: CANADA
Pistons, speed pro has quality forged piston replacments, with anti friction coating. Part # L2482F I think. Con rods, eagle specialty products has H beam rods in the stock 5.155 length. Not sure of any more off the shelf parts. Most piston and rod manufacturers can make ones for you as well, maybe some titanium rods? where to get them is up to you.
Elder User
Joined: Oct 2005
Posts: 677
Likes: 0
Depends on the CC of the heads you are going to use. Most manufacturers will list pistons by engine application and then give you a compression ratios for CC of the heads. Stock 289 heads are all 58CC.
What will determine the pistons is the heads you are going to use. I would advise against using 64 CC heads of 302s and 351Ws and pop ups to get a decent compression ratios. Stick to the 58 CC heads and flat tops.
I just built a 289 with 64CC 70 351W heads with pop-ups and a retro-fit roller from comp cams with .480 lift and I had a devil of a time tuning it in.... turns out the set-up is detonation prone and needs 100 Octane gas to run and keep the rings sealed properly.
Call the piston manufacturers and get a part number for a 289. Depending on what you are trying to do, you can even get cheepo cast pistons from a place like PAW if you are going to use a stock low lift cam.
If you stay with a 58CC head look for a piston that has about +6.5 CC of relief space which will give you a 9.2 compresion ratio with 58CC heads, which is all you will need.
As for Rods... you can get stockers on E-bay. You don't need the aftermarket rods for a 289 because the stroke is so short rod twisting in not a problem. If you can't find a set of stock rods, Crower, Eagle, Childs and Albert all will make a 5.155 Rod. Some racers use them for long rod 302s (the Boss 302 had 5.155 Rods) You will probably have to call them to get the part numbers for them too.
Once you have the part numbers you can get them from Summit or Jegs, or maybe even NAPA.
What will determine the pistons is the heads you are going to use. I would advise against using 64 CC heads of 302s and 351Ws and pop ups to get a decent compression ratios. Stick to the 58 CC heads and flat tops.
I just built a 289 with 64CC 70 351W heads with pop-ups and a retro-fit roller from comp cams with .480 lift and I had a devil of a time tuning it in.... turns out the set-up is detonation prone and needs 100 Octane gas to run and keep the rings sealed properly.
Call the piston manufacturers and get a part number for a 289. Depending on what you are trying to do, you can even get cheepo cast pistons from a place like PAW if you are going to use a stock low lift cam.
If you stay with a 58CC head look for a piston that has about +6.5 CC of relief space which will give you a 9.2 compresion ratio with 58CC heads, which is all you will need.
As for Rods... you can get stockers on E-bay. You don't need the aftermarket rods for a 289 because the stroke is so short rod twisting in not a problem. If you can't find a set of stock rods, Crower, Eagle, Childs and Albert all will make a 5.155 Rod. Some racers use them for long rod 302s (the Boss 302 had 5.155 Rods) You will probably have to call them to get the part numbers for them too.
Once you have the part numbers you can get them from Summit or Jegs, or maybe even NAPA.
Hotshot
Joined: May 2003
Posts: 11,141
Likes: 25
From: south louisiana
Originally Posted by Boba Fett
Depends on the CC of the heads you are going to use. Most manufacturers will list pistons by engine application and then give you a compression ratios for CC of the heads. Stock 289 heads are all 58CC.
