Did gm upgrade rod bolts in zz4?
03-14-2015, 06:45 PM
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Car: 1986 z28
Engine: 350 hsr
Transmission: probuilt 700r4/edge 2800
Axle/Gears: stock 4th gen 3.23
Did gm upgrade rod bolts in zz4?
Hi I'm getting ready to build an engine and was looking to use zz4 shortblock but I was wondering if gm upgraded the rod bolts in that engine as that's the weakest link in the sbc bottom end. Also if they didnt and I replace them with arp rod bolts would I have to have the rods resized? looking to spin it to 6,500 max.
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03-14-2015, 08:09 PM
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Car: '86 Bird, 96 ImpalaSS, 98 C1500XCab
Engine: LG4, LT1, L31
Transmission: 700R4, 4L60E, 4L60E
Axle/Gears: 3.73 Tors, 4.88 spool, 3.73 Eaton
Re: Did gm upgrade rod bolts in zz4?
I can't tell you what type of rod bolts are in it, but no, it would be a bad idea to change the bolt type without resizing the rods.
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