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Old 03-21-2011, 12:51 AM
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Scat con rod id

i have a set of rods marked "scat 60". did a search on the interwebs and found nothing. i know there 6" rods as they came out of the second hand short block 383 sbc i picked up.

is there any way to find out if they are cast or forged?

Also as a bonus question i installed my xfi280 cam and have cam to inside con rod clearance issues. just tappin the lobe a few degrees before full lift i clearanced 2 myself and ran out of daylight, im not taking off alot just enough to get .050 ( checked with a zip tie that just so happens to be .052) should i be conserned about balancing issues now?
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Old 03-21-2011, 12:58 AM
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usually to tell if something is cast or forged u look at it and if its cast ull see mold marks (the cast the liquid metal was put into) they will look like little bumped up lines. idk about the cam.
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Old 03-21-2011, 01:08 AM
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a picture is worth a thousand words hope this helps
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Old 03-21-2011, 03:03 AM
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those look like they r cast. cause of the mold marks on the side of the connecting rod.
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Old 03-21-2011, 03:04 AM
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the pistons look like they r after market and forged
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Old 03-21-2011, 03:06 AM
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scat is a very good brand that i have found.
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Old 03-21-2011, 04:56 AM
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Quote:
Originally Posted by TMF Lindbeck
i have a set of rods marked "scat 60". did a search on the interwebs and found nothing. i know there 6" rods as they came out of the second hand short block 383 sbc i picked up.

is there any way to find out if they are cast or forged?

Also as a bonus question i installed my xfi280 cam and have cam to inside con rod clearance issues. just tappin the lobe a few degrees before full lift i clearanced 2 myself and ran out of daylight, im not taking off alot just enough to get .050 ( checked with a zip tie that just so happens to be .052) should i be conserned about balancing issues now?
That's actually "6D". The rod is a 6" forged, piston is 0.040" over forged. There are no cast rods from the aftermarket for the SBC that I know of- even stock rods are forged.

Take off as little as you can to get the 0.050" clearance, the balance will still be fine.

BTW, because of how the pin intrudes into the oil ring groove an oil rail support is used w/these pistons.

Last edited by cobalt327; 03-21-2011 at 05:01 AM.
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Old 03-21-2011, 05:06 AM
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Quote:
Originally Posted by cobalt327
That's actually "6D". The rod is a 6" forged, piston is 0.040" over forged.

Take off as little as you can to get the 0.050" clearance, the balance will still be fine.

BTW, because of how the pin intrudes into the oil ring groove an oil rail support is used w/these pistons.
Really its 6D? i need to have my eyes looked at actually i just rechecked the markings and as far as i can tell having it in my hand its "60" you seem to know what your talking about from what ive seen from snoopin around on here so thank you. i did look up that p/n on the srp piston and you hit that on the head too.
do you think this setup with a scat crank will hold up to a 100 or 150 shot of nos?
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Old 03-21-2011, 05:24 AM
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Quote:
Originally Posted by TMF Lindbeck
Really its 6D?
That's what it looks like on my monitor:



Quote:
do you think this setup with a scat crank will hold up to a 100 or 150 shot of nos?
As long as the engine's right (ring and valve seal good, bearing clearances correct) and you have sufficient ring gaps, and the set-up is correct for cam and ignition timing, air/fuel ratio and octane (the usual stuff, in other words), you'll be fine.
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Old 03-21-2011, 05:29 AM
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ok yea i see that now the flash distorted the picture a bit but i assure its a 0.i just reviewed another pic of the rod i took on my computer and it looks has the same distortion in the pic because of the flash. thanks for the help
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Old 03-21-2011, 05:51 AM
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Now that you mention it, I do recall seeing "60" (IIRC) on a set of Scat rods. Was some time back, though.
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Old 03-21-2011, 01:52 PM
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Cobalt has filled you in pretty much correct. It is 60, they leave the . out and it stands for 6.0" length. The 5.7" rods say "57" on them.

All Scat rods are forged, and like Cobalt has said I don't think there was ever a cast SBC rod in all of history, closest thing to cast would be the powdered metal rods in use today.

You're cam clearancing of the rods is correct, and don't worry about the balance, you are removing less than 2 grams. I usually just do all the rods whether they need it or not, so they all are the same weight.

250 shot of NOS would be no problem as far as the rod and piston is concerned. Cast steel Scat 9000 crank would also be fine at 250 shot if that is what you have.

Your rods are Scat ProStock rods, 3/8" bolt.
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Old 03-21-2011, 02:46 PM
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the bolts have "SCAT AI 0505" if thay means anything tq to 64 ft lbs I bleave
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Old 03-21-2011, 03:16 PM
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I'm really happy with the $700 I spent on this short block. The truck it came out of was cherry I checked all the fluids and took it for a spin and ran like a rapped ape, and that was with sportman s/r iron heads and a cc 08-302-8 cam I'm bumpin it up to a XFI280 cam with AFR195 heads for my 87 corvette
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Old 03-21-2011, 03:39 PM
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64 ftlbs is way too high, you will stretch and fail the bolt. 63 ftlbs is the spec for 7/16" rod bolts of 8740 material, the 3/8" bolts are torqued to 45 ftlbs using the ARP moly lube.

Specs are on Scats web site, in the Tech section. You have the 8740 material bolts.
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