SPEED PRO PISTON ID ? - Third Generation F-Body Message Boards

SPIKE · 10-03-2007, 08:18 PM

can any one tell me what the numbers on the top of the pistons mean ?

H345NCP .030 = PART# + 4.030 bore

07-130-D2-C = ????

i bought a set of new pistons and the box came in with the seal broke and the # im questioning is different on some of the pistons. there suppose to be a matching set. can i tell by this #

other pistons are.

07-131-D2-B
07-171-L1-A

any help cant find any thing on line from federal mogul.

and if any one can scan in the installation instructions that were suppose to be in the box id appreciate it. i know how i just like to have a copy for my car folder.

thanks
mike

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sofakingdom · 10-03-2007, 09:18 PM

Those other numbers are misc manufacturing stuff; mold cavities, shift codes, casting dates, stuff like that. TOTALLY USELESS once the pistons are in a box.

Sorry, no instructions; even though I've used some like that before. I don't recall any surprises though.

Have you tried going to your local speed shop, and offering the guy behind the counter a 6-pack if he'll pull a set off the shelf and loan you the instr sheet long enough to go to the library and copy it?

I realize it's not "free", like getting somebody to post it on the Net; but it shouldn't cost more than a quarter or so. Might even get to help consume the 6.

InfernalVortex · 10-03-2007, 09:59 PM

The seal on my set was broke also, Im not that worried about it, I dont think youj should be either.

Also, interesting note. I had a HELL of a time finding those pistons. Apparently Speed Pro is moving their production to India and they're having a lot of quality control problems right now, which is why even on summit's site a few of their pistons arent due for another month or two.

I managed to snag a coated set since most of the ebay shops didnt carry .060 over, and the ones that did flat out told me they only had a fwe sets left.

I bought mine since I had a perfectly good set of 7, and I was going to pair up an 8th to it. But the castings were CLEARLY different from my 1 new one to the 7 old ones. The part numbers are clearly the same. After more inspection, pretty much everything about htem is just a little different.

I was going to go get them all balanced up but I figured I'd just splurge for a new coated set for the peace of mind.

Turns out the older set was made in the USA, the newer piston (and my new full set) are made in Italy, and pretty soon they're all gonna be made in India.

So if you want some Italian made ones over some Indian ones, you better snag em up now. Although I doubt it'll be that big of a deal, even if they're currently having quality control problems...

SPIKE · 10-03-2007, 10:04 PM

thanks sofa, your the man. so worried about #s i didnt think of that. i got a great speed shop that will probably make me a copy if i ask. (murrys speed shop).

didnt know if the second # 130 0r 170 was a weight code or something and if they were suppose to weigh close to the same ?

well finally get to put pistons in this thing this weekend

im so close now!!!!!

Bigseth · 10-03-2007, 10:09 PM

Federal mogul is moving there piston manufacturing completely to india. They are out of a ton of pistons. They are actually buying Silvolites and reboxing them on there more popular #s . It is not uncommon to get a set with pistons made in different places. They are still a matched set so you should be ok. The difference in looks doesnt affect the part, or functionality.

Seth

SPIKE · 10-04-2007, 08:20 AM

thanks for all the info, just checked and all the pistons are made in italy and look all the same except for mfg #. guess i got lucky found these h345ncp coated pistons for $99. with rings.