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Hypers are cast pistons with a higher silicon content, this allows for less expansion so engines can be built with tighter tolerances.
For me the down side is when over rev'd cast pistons will crack and sometimes break a skirt off, hyper pistons will break and often damage the cylinder wall.
Both types are rated to a max of 6000 rpm so I personally don't see any gain with the higher cost of hypers over cast.
Forged pistons will bend before breaking and will take much higher rpm's without failing
I do not plan on anything past 5k with this engine build so I’ll be good for this one. Next future build will feature more quality and support mods for HP
Ring end gap critical with hypers, look it up...….
Yep yep, current end gap is .016 and I need to bring it to .022. 2nd and oil rings can stay at stock gap but I kind of want to open the second gap another .002 or so. Not sure if it’s negligible or not
no, I purchased some hypereucectic pistons for this go around. My worry with getting the honeycomb springs is their poundage might be too much on the cam with it being a flat tappet, even after break in. I found a awesome forum of using a old rocker shaft, 2 rockers welded together and then two of the stands that worked out awesome, so I will keep these springs I have since I found a way to do it
I used the Bee Hive Springs on my 447FE. Here they are in the head.
When I get back to my engine I'm going to look at the bee hive springs again, first I've got to find a company that'll do the custom grind I'm wanting.
Actually it's more of when I can afford it.
Comp Cams 33-000-9 Custom Core is what I started with. Comp did the custom grind and gave me serial number for my cam using that core to what the engine shop and I came up with for my build. Now since I had an engine performance shop get it through Comp I don't know if you can just get it as a retail item. Summit Racing lists the core in the catalog so maybe you can, but Comp did say to use the Bee Hive Springs with my cam.
Thanks I'll look into it
I'm looking for a roller cam without a lot of lift, something in the 220-230 .050 duration but not over .550 lift for longer spring life, .525-.540 would be better.
Seams like everyone making retro fit rollers want to put race roller lifts on them in the .575-.600+ range
Not looking for big hp or mega rpm's like years ago, just a nice street cruiser with a little sound that doesn't need new valve springs every year.
Lunati’s Voodoo series of camshafts deliver more area under the curve than any other series of camshafts. This means more throttle response, quicker acceleration, more vacuum and better efficiency. These factors, combined with maximum horsepower and torque, make Voodoo camshafts the perfect choice for a wide range of high performance applications.Retro-Fit Hydraulic Roller Cam. Excellent HO replacement type cam with noticeable torque and HP increases throughout the RPM range. Works with stock mass-air type injection systems.
Well... more wonderful luck for me now. Finally got my block back with my new cam bearings installed and I go to put my new camshaft in and when it gets to the last 2 bearings it absolutely will not go in without tapping. I tapped it in a bit just Incase my assembly lube was screwing with it and the cam would not rotate in any way. My patience is wearing extremely thin on this engine and I am extremely close to selling it for someone else to do with.
I will test out a old cam to see if I possibly got a bad cam instead, which I’d prefer. But I’m better news I did manage to get myself a new (to me) pickup! Not a ford but I am pretty happy with it...
I've got a set of 17" Dodge Wheels on my 69 F-250 Camper Special. DODGE 17 inch Wheel 2004 Ram 2500 Series Trk I removed my B.F Goodrich premium 16.5"x35's Load 2800# to install Dodge Nitro used 17"x35's Load #1750 Guess they don't make them like they used to my old tires were quite larger even though they were 16.5's. I only paid $125.00 for the set of tires and rims so I planned to upgrade the tires anyway. Fitting the 2004 Dodge Rim on my 69 F-250 Camper Special ...needed 2" thick spacers 8x6.5 on 8x6.5
Well... more wonderful luck for me now. Finally got my block back with my new cam bearings installed and I go to put my new camshaft in and when it gets to the last 2 bearings it absolutely will not go in without tapping. I tapped it in a bit just Incase my assembly lube was screwing with it and the cam would not rotate in any way. My patience is wearing extremely thin on this engine and I am extremely close to selling it for someone else to do with.
I will test out a old cam to see if I possibly got a bad cam instead, which I’d prefer. But I’m better news I did manage to get myself a new (to me) pickup! Not a ford but I am pretty happy with it...
Nice Truck! Sorry to hear about the new problems. When your working with these old Trucks ... one must be prepared .. make your best plans and then expect unexpected anyway.
