Piston ideas for 1965 425 engine.
#1
Piston ideas for 1965 425 engine.
Hello guys,
Ive been stumped for a few weeks on which type of piston I would like to get for my 425. Forged or cast? Ive heard positives and negatives about both.
I hear forged need more bore clearance because they expand which in turn you get piston slap during start up and while it warms up. I'd like to keep this engine going for a very long time and I don't want to hurt the bores. This motor will not be getting any power adders either which is what forged are good for.
Cast I dont see a problem with but when I ask the car buddies they all say go with forged. I just don't want to have to run into any problems and regret my decision on pistons. They are kinda a big deal. And what do you guys think of the Egge or Kanter brand cast pistons??
The motor has to be bored at LEAST .030 over due to the bore sizes being .010 difference between bores and it's not getting bored till I get the pistons.
Any advice would be greatly appreciated! Thanks! By the way just snagged a 69 cutlass!
Ive been stumped for a few weeks on which type of piston I would like to get for my 425. Forged or cast? Ive heard positives and negatives about both.
I hear forged need more bore clearance because they expand which in turn you get piston slap during start up and while it warms up. I'd like to keep this engine going for a very long time and I don't want to hurt the bores. This motor will not be getting any power adders either which is what forged are good for.
Cast I dont see a problem with but when I ask the car buddies they all say go with forged. I just don't want to have to run into any problems and regret my decision on pistons. They are kinda a big deal. And what do you guys think of the Egge or Kanter brand cast pistons??
The motor has to be bored at LEAST .030 over due to the bore sizes being .010 difference between bores and it's not getting bored till I get the pistons.
Any advice would be greatly appreciated! Thanks! By the way just snagged a 69 cutlass!
#2
I'm definetely not an expert, but this is what I went with for my strictly street 1967 425ci engine... Kanter.com.... http://www.kanter.com///cart.aspx?Tg...Cat=32&Prc=362
I choose the 0.30 low compression pistons, they call them 2 barrel pistons. BTW... these were the only pistons that I could find for my engine at the time. Egge and Badger said they are not currently making them because the demand is not there.
Good luck with your rebuild!
Jaybird
I choose the 0.30 low compression pistons, they call them 2 barrel pistons. BTW... these were the only pistons that I could find for my engine at the time. Egge and Badger said they are not currently making them because the demand is not there.
Good luck with your rebuild!
Jaybird
#5
I've been going nuts trying to decide what I want to do! Hah, I just don't want to get something that I regret down the line. And no it's not going to be a high rpm motor, its gonna be a street torque monster. You should see how clean that block is! You wouldn't recognize it!
#11
dick miller has pistons for the 425 but they are spendy... the name brand escapes me at the moment but i believe that they are diamond. at any rate good stuff and lightweight which is always good.
oldsy, do you mean 425?
oldsy, do you mean 425?
#12
#16
I brought the block in to get pressure checked and magnafluxed and they cleaned it for me! I keep it oiled. I ended up going with a set of cast pistons, sorry such a late response. But I'm not going to be using any power adders and it's not going to be a race motor so cast should be perfect!
#17
I have a set of bone stock factory Hi comp 425 pistons on the rods. came from a low mile engine. pm me for more info.
Also be sure to note when you buy the cam to spec it is a 45* block. Everything else you can think 455 (rod brgs, mains, cam brg, freeze plugs, timing chain) be sure to get the split rubber rear main seal. You may have to specify it as a Ford 460 rear main seal.
Be sure to align hone the mains with the bolts or studs you are going to use. Also deck block for straightness. You can install crank and one piston and check for deck height and decide how much to take off for compression.
Gene
Also be sure to note when you buy the cam to spec it is a 45* block. Everything else you can think 455 (rod brgs, mains, cam brg, freeze plugs, timing chain) be sure to get the split rubber rear main seal. You may have to specify it as a Ford 460 rear main seal.
Be sure to align hone the mains with the bolts or studs you are going to use. Also deck block for straightness. You can install crank and one piston and check for deck height and decide how much to take off for compression.
Gene
Last edited by 64Rocket; November 5th, 2011 at 12:27 PM.
#19
Hey Olds92: Where did you end up getting your pistons from? It looks like Mondelleo might have some 425 pistons.
http://www.mondellotwister.com/PisPinRingBrng.htm
http://www.mondellotwister.com/PisPinRingBrng.htm
#21
I brought the block in to get pressure checked and magnafluxed and they cleaned it for me! I keep it oiled. I ended up going with a set of cast pistons, sorry such a late response. But I'm not going to be using any power adders and it's not going to be a race motor so cast should be perfect!
Good choice. Thats all you will need.
On a side note. Im going to be getting a small shop. Signing the lease this week. Its out in Big Rock,Il you should stop out sometime.
#22
Be sure the pistons from Mondello in Paso Robles Ca are 425 pistons. I bought a set a few years back from him and all they did was mill off the tops of 455 pistons which left the top ring land to close to the top. They didn't last but a few trips down the road. The tops all warp and eat up the rings. They were only good for the trash bin. You need .200 or more from the top of the piston to the first ring.
Sounds from what you have said, cast will do just fine.
Gene
Sounds from what you have said, cast will do just fine.
Gene
#23
Hey Olds92: Where did you end up getting your pistons from? It looks like Mondelleo might have some 425 pistons.
http://www.mondellotwister.com/PisPinRingBrng.htm
http://www.mondellotwister.com/PisPinRingBrng.htm
#24
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