1970 Duster AlterKtion, 4 Link, LS/T56/Turbo and Minitub
A couple more updates. Got the new 4.8 pistons to the machine shop yesterday with the gen 4 rods. Also we looked at his piston chart he has from Mahle that says to gap the rings .005 per inch. Thats what he had done which puts me at around .019. I told him that wasnt enough for the boost and beating I'm running. So I told him at LEAST .008 per inch. Basically telling him .030 to .032 for the ring gap. So they should have the bottom end all back together next week with the new bearings and the rings gapped. I've put enough motors together now I have no shame having a machine doing the bottom end on a motor thats getting the **** beat out of it since they have all the correct measuring tools. Where as I have a micrometer, calipers, mag base with a dial indicator and a hammer.... thats about it for precision measuring tools. Hopefully I'll have better luck this go around!
Just in case anyone here didn't know and is pondering LS things, the 4.8 pistons are flat top pistons where a 5.3 are dished. The 4.8 and 5.3 share the same bore where as the 5.3 and the 6.0 share the same stroke. However, the 4.8 uses a different rod length so the wrist pin location hole on the pistons are in the same spot. There for you can put a 4.8 piston in a 5.3 and it makes a 10.3:1 5.3 just like the L33 5.3 (high output) or the LQ9 6.0 is that comes in the Denali.
A couple more updates. Got the new 4.8 pistons to the machine shop yesterday with the gen 4 rods. Also we looked at his piston chart he has from Mahle that says to gap the rings .005 per inch. Thats what he had done which puts me at around .019. I told him that wasnt enough for the boost and beating I'm running. So I told him at LEAST .008 per inch. Basically telling him .030 to .032 for the ring gap. So they should have the bottom end all back together next week with the new bearings and the rings gapped. I've put enough motors together now I have no shame having a machine doing the bottom end on a motor thats getting the **** beat out of it since they have all the correct measuring tools. Where as I have a micrometer, calipers, mag base with a dial indicator and a hammer.... thats about it for precision measuring tools. Hopefully I'll have better luck this go around!
Just in case anyone here didn't know and is pondering LS things, the 4.8 pistons are flat top pistons where a 5.3 are dished. The 4.8 and 5.3 share the same bore where as the 5.3 and the 6.0 share the same stroke. However, the 4.8 uses a different rod length so the wrist pin location hole on the pistons are in the same spot. There for you can put a 4.8 piston in a 5.3 and it makes a 10.3:1 5.3 just like the L33 5.3 (high output) or the LQ9 6.0 is that comes in the Denali.
