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Post  SkapeGote on Fri Jul 11, 2014 2:24 pm

Hey Guys,

I am looking to buy some .030 pistons for my 460 rebuild. I have decided on using Edelbrock heads, the 94cc ones. As for pistons, I was looking at Speed Pro flat yops. Has anyone here used them before?. If they are crap, who would you recommend buying from. I am looking for a piston and ring kit. This engine will only make 450 - 500 hp. I am using truck rods and a Performer or Weiand intake. Please make your recommendations.

Thanks,

Skape

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Post  SandHillsHillbilly on Fri Jul 11, 2014 2:38 pm

What kind of compression ratio are you looking for?
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Post  SkapeGote on Fri Jul 11, 2014 3:12 pm

Nothing to specific. I have access to 93 octane fuel here so as long as it will play well with that I am happy.

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Post  Dave De on Fri Jul 11, 2014 6:03 pm

Probe or Diamond are first choice for me. If you run flat tops the compression ratio will be close to 10. Plug the numbers into Diamonds cslculator and see what you get. Make sure you know how much they are in the hole.
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Post  69F100 on Fri Jul 11, 2014 6:43 pm

I have the cheap speed pro flat tops in my 460 with dove c heads mine is 10.6 c/r I have turned it 6500 rpm with truck rods when I freshen the engine after two seasons when I pulled it to put the 552 the pistons still looked new. The ETs my truck ran and Wallace Racing Cals said it made 536hp. If you are on a budget they are cheap and seem to be ok for the money but are heavy if the budget is not real tight get the better pistons from Ross, Probe or some other name brand that deals more in racing pistons.
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Post  supervel45 on Wed Jul 16, 2014 4:59 am

Probe 460 SCJ/P51 forged with -15cc dish..........$399.95                Another Option. These are at Cars by Carl, and may only be for .060 over, if he still has any.

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Post  dfree383 on Wed Jul 16, 2014 8:13 am

10661 probe flat tops are a great bank for the buck.


Last edited by dfree383 on Wed Jul 16, 2014 1:06 pm; edited 1 time in total
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Post  Paul Kane on Wed Jul 16, 2014 10:49 am

SkapeGote wrote:Hey Guys,

I am looking to buy some .030 pistons for my 460 rebuild. I have decided on using Edelbrock heads, the 94cc ones. As for pistons, I was looking at Speed Pro flat tops. Has anyone here used them before?. If they are crap, who would you recommend buying from. I am looking for a piston and ring kit. This engine will only make 450 - 500 hp. I am using truck rods and a Performer or Weiand intake. Please make your recommendations.

Thanks,

Skape
I have not much cared for the speed pro flat tops since the time they have been manufactured in India and at which point QC dropped substantially. I have not seen a set as of late to know if this is still the case.

If I were building a street engine that will generate less than 500hp (and much of the time that engine will not be making WOT, peak rpm, 500hp), then I might run the KB 3109 cast pistons (7cc dish), which will put compression ratio at about 9.5:1 (with the pistons about 0.005" in the hole).  For a flat top, I'd consider the KB137 hyper which would put compression ratio at about 9.8:1 (at zero deck).

The catch with the KB 137 hyper is that it is almost as much as a forged pistons, so at that point you might then consider the Probe 10661 forging.

I realize this is off the subject but for what it's worth you really don't need to spend the money on aluminum heads to make 450-500 hp.
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Post  Rabbit on Wed Jul 16, 2014 8:26 pm

Icon make a set just for your heads but there forged  #IC636 3.4cc and they make a set 15cc I think there the same people that make KB pistons uempistons.com
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Post  69F100 on Thu Jul 17, 2014 2:16 am

Rabbit wrote:Icon make a set just for your heads but there forged  #IC636 3.4cc and they make a set 15cc I think there the same people that make KB pistons uempistons.com

The Icon in my 552 are made by KB
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Post  rmcomprandy on Thu Jul 17, 2014 8:42 am

FIRST,  there is a large difference between material and design of just the forged pistons available ... then there are the cast pistons, also.

As cast pistons go ... the flat top Speed-Pro CAST-hyper piston works very well in regular to moderate high performance engines.


Last edited by rmcomprandy on Thu Jul 17, 2014 6:40 pm; edited 1 time in total (Reason for editing : typo's galore ... fixed.)

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Post  IDT-572 on Thu Jul 17, 2014 12:39 pm

rmcomprandy wrote:FIST,  there is a large difference between material and design of just the forged pistons available ... then there are the cast pistons, also.

As cast pistons go ... the flat top Speed-Pro CAST-hyper piston works very well in regular to moderate high performance engines.


This gets my vote at the hp level your after................... and with the aluminum head your compression will be able to run pump gas.

Debur piston tops and chambers and get your quench around .040 This combo works well.
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Post  SandHillsHillbilly on Thu Jul 17, 2014 11:02 pm

Been watching this closely as my needs are similar except TFS street heads with 74cc chamber.

After reading the comments about SpeedPro pistons. I started looking elsewhere for an economical forged piston similar to SpeedPro but better quality control.

I found a Probe FRS piston with the same part number as SpeedPro. Forged and economical P2404F with a 24.4cc dish should give me about 9.6 compression. Does anyone have any past experience with this piston?
http://www.probeindustries.com/Ford_460_24_4cc_Dish_Top_FPS_Pistons_p/p2404f.htm

I think their specs are off cause the numbers don't add up right. According to their specs the piston ends up at 10.286. I hope it is not that far down in the hole.
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Post  rmcomprandy on Fri Jul 18, 2014 8:45 am

SandHillsHillbilly wrote:Been watching this closely as my needs are similar except TFS street heads with 74cc chamber.

After reading the comments about SpeedPro pistons. I started looking elsewhere for an economical forged piston similar to SpeedPro but better quality control.

I found a Probe FRS piston with the same part number as SpeedPro. Forged and economical P2404F with a 24.4cc dish should give me about 9.6 compression. Does anyone have any past experience with this piston?
http://www.probeindustries.com/Ford_460_24_4cc_Dish_Top_FPS_Pistons_p/p2404f.htm

I think their specs are off cause the numbers don't add up right. According to their specs the piston ends up at 10.286. I hope it is not that far down in the hole.

THAT Probe piston is a dish-top, NOT a flat-top.

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