How much boost for 4.8 short block?
02-06-2008, 03:16 AM
#1
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How much boost for 4.8 short block? A guy i know just blew his motor up in his truck. He has a stock short block 4.8 Regency with arp rod bolts, ported stock heads, blower cam, full fuel system, procharger with 12psi and put down i think it was 480whp. Well i told them why it blew up because it was to much boost and he told me its safe to run that much 
I have always been informed 5-9psi. He dosnt have alcohol but the kit came with a inter cooler. He has thrown a stock 6.0 in it for now and he is going to build that motor now. I was just wanting to know how much can stock LSX motors handle safely for a DD. They have not yet pulled the heads off the 4.8 they said it was lack of oil pressure for that much power but the pressure gauge was reading good
I have always been informed 5-9psi. He dosnt have alcohol but the kit came with a inter cooler. He has thrown a stock 6.0 in it for now and he is going to build that motor now. I was just wanting to know how much can stock LSX motors handle safely for a DD. They have not yet pulled the heads off the 4.8 they said it was lack of oil pressure for that much power but the pressure gauge was reading good 
02-06-2008, 05:18 AM
#2
You are correct, there is a reason why the ProCharger kit for the 4.8/5.3 is listed for 8-9 psi, shown here. http://www.exoticperformanceplus.com....html?item=988
12 psi is waay to much boost on the stock bottom end. Bob
12 psi is waay to much boost on the stock bottom end. Bob
