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Discussion Starter · #1 ·
:confused: I acquired an old (but still brand new) set of SPEEDPRO pistons with 7006P 030 stamped on the top. Supposedly they are for 350ci. with 5.700" rods and 3.48" stroke. Some of the measurements are 4.030 diameter, (2) 5/64", (1) 3/16" grooves, .910" pin diameter (all SBC I worked on had .927" pin diameter), 1.607" comp height, 3.721" piston overall height (top to bottom of skirt) and flat top with (4) valve relieves. The pistons are forged with 55-99 on the underside of the head. I searched the part number on the internet with no success. Any help identifying the piston will be greatly appreciated. Thank you in advance.
 

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327 Pistons

Hey Friend, This just came up recently on another thread. I'm pretty sure those are 327 pistons. If its the small dome(~.125) its the same as a L2166 Speed Pro. 11.0:1CR w/58cc. Can't explain why your measurements are coming in under. If the pin bore is a little small and the compression height is a little short, maybe your caliper got dropped? olnolan
 

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Discussion Starter · #5 ·
Thanks everyone.
DoubleVision - As I stated the pin diameter is .910" and compression height I'm used to work with on the SBC is 1.560" and 1.540".

302 Z28 - I suspected the set is discontinued and cannot find a local vendor with old catalogs.

OLNOLAN - The pistons are completely flat with four eyebrows, no dish or dome. After taking the measurements I verified my caliper is good and even used another caliper and height gauge.

I got these pistons with the wrong info attached and if I cannot use them I will need the final usage for who ever ends up with them. So keep the research coming fellows. Thanks again.
 

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My Bad

My bad, sorry Fierosum, I got these confused with 7002p post recently. I started hunting again, it looks like Cobalt has it figured out. Apologies for the confusion. :embarrass olnolan
 

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7006p30

Hey Ya'll, Well I finally found a Sealed Power cross reference chart. Had it in my shop books, it was right under my nose the whole time! I had been doing agonizing internet searches. I had spent alot of time reading old post and such trying to ID some 7002p pistons and got that number locked in my head. That's how I screwed up when searching the 7006. Doublevision nailed it to begin with, they are 289 pistons. I'll supply everything from the book to make up for my faux pas. Here goes:
289 engine 4.030 bore x 2.87 stroke
old#7006P30---new# L2218F30
Forged street piston 293CI @.030
compression 9.68w/54.5cc,9.24w/58.2cc,9.00w/60.4cc,8.73w/63cc,8.17w/69cc
compression dist.-1.602
clearance-.014 deck, .005 skirt
flat 4 relief
rings-E-251K 30 sealed power moly, R-9903 30 Speed Pro plasma moly std.fit
R-9343 35 Speed Pro plasma moly file fit
5/64,5/64,3/16
pressed or floating pin, does not give pin size

olnolan :thumbup:
 
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