Milling 243 Heads For 5.3 at George Ashcraft blog

Milling 243 Heads For 5.3. I would run them the way they are and. The 4.8 and 5.3 come with 799(243) heads from the factory nowadays. If you're still interested in running the 243/799 cylinder heads on an lm7 5.3l i would highly recommend milling the cylinder head at a minimum of 0.025 to bump up the. Iit picked up 46hp over the stock. The 799/243 head is great for flow, but given that your engine originally came with 706 heads, it likely. If you want to make power with a 5.3, you need compression or boost. A.035 mill on 243/799 heads will yield 59 cc chambers, add a.040 head gasket and you'll be a little bit over 10.1:1. I'm trying to puzzle out the best way to get a gen4 5.3l from 10:1 up to around 10.8 or so. You can mill the heads to maintain the compression, but the. I used a comp 219/227.607/.617 (ish) cam on a 2008 5.3l w/ longtubes and stock 243 head. Heads are milled.125 total, from stock from what i can tell. I cc'd again and got 46.75cc. Ended up with a 7.300 pushrod lifter.

243 heads LS1TECH
from ls1tech.com

A.035 mill on 243/799 heads will yield 59 cc chambers, add a.040 head gasket and you'll be a little bit over 10.1:1. If you're still interested in running the 243/799 cylinder heads on an lm7 5.3l i would highly recommend milling the cylinder head at a minimum of 0.025 to bump up the. If you want to make power with a 5.3, you need compression or boost. Iit picked up 46hp over the stock. Ended up with a 7.300 pushrod lifter. I'm trying to puzzle out the best way to get a gen4 5.3l from 10:1 up to around 10.8 or so. You can mill the heads to maintain the compression, but the. Heads are milled.125 total, from stock from what i can tell. I would run them the way they are and. I used a comp 219/227.607/.617 (ish) cam on a 2008 5.3l w/ longtubes and stock 243 head.

243 heads LS1TECH

Milling 243 Heads For 5.3 A.035 mill on 243/799 heads will yield 59 cc chambers, add a.040 head gasket and you'll be a little bit over 10.1:1. A.035 mill on 243/799 heads will yield 59 cc chambers, add a.040 head gasket and you'll be a little bit over 10.1:1. I would run them the way they are and. The 4.8 and 5.3 come with 799(243) heads from the factory nowadays. Ended up with a 7.300 pushrod lifter. If you're still interested in running the 243/799 cylinder heads on an lm7 5.3l i would highly recommend milling the cylinder head at a minimum of 0.025 to bump up the. I cc'd again and got 46.75cc. Iit picked up 46hp over the stock. You can mill the heads to maintain the compression, but the. I'm trying to puzzle out the best way to get a gen4 5.3l from 10:1 up to around 10.8 or so. The 799/243 head is great for flow, but given that your engine originally came with 706 heads, it likely. I used a comp 219/227.607/.617 (ish) cam on a 2008 5.3l w/ longtubes and stock 243 head. If you want to make power with a 5.3, you need compression or boost. Heads are milled.125 total, from stock from what i can tell.

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