4.8L build to 366 c.i.
03-27-2008, 09:00 AM
#41
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I'm glad someone finally chimed in that has some great info. I like the numbers from the link you provided me. That's about what I would like my truck to run when it's said and done. BTW, what cylinder heads are on that engine? I was planning on running some 317s to help lower compression and I knew that they flow better then the stock 4.8/5.3 heads on the older engines. This information satisfies me now... More cubes is always good, and if I can run less boost and achieve the numbers I want, then I will be very happy. I think I'm going to consider this 3.905" bore with a 4" stroke.
Good luck!
03-27-2008, 11:07 AM
#44
The block will be sonic tested prior to any machine work, and if the machine shop lets me, I will take pictures of the entire process with a full write up to hopefully become sticky'd on this site. That way when a 5.3 to 5.7 question comes up you guys can link the newbies to the sticky.
03-27-2008, 12:55 PM
#45
14 Second Truck Club
My brother has done the 5.3 to 5.7. It ran 14.10's with no traction. Here's a link to what he has. 2nd one on page http://www.nelsonperformance.com/customers2.htm
03-27-2008, 01:29 PM
#46
So what if??
You had a 4.8/5.3 block and u kept standard bore and just went
with the 4inch stroke what would the cubes be at that point i think
thats the way too go if possible. JMHO
with the 4inch stroke what would the cubes be at that point i think
thats the way too go if possible. JMHO
03-27-2008, 04:05 PM
#47
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359ci That would require custom pistons ~$800 vs off the shelf LS1 pistons which would offset the cost of boring which basically means 24 free cubes that many have proven it to be reliable. Of course most would bore the 5.3 anyhow so it would be more like 24 less cubes for $150 more. Not my opinion of a smart investment.
03-27-2008, 08:56 PM
#48
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359ci That would require custom pistons ~$800 vs off the shelf LS1 pistons which would offset the cost of boring which basically means 24 free cubes that many have proven it to be reliable. Of course most would bore the 5.3 anyhow so it would be more like 24 less cubes for $150 more. Not my opinion of a smart investment.
04-19-2008, 11:50 PM
#49
I too was considered doing the 5.3 to 5.7 stock bore, How ever after looking at the cylinder design I am affraid the block might possible be to thin and I dont want to take a chance on this as its going to be a replacement for my DD. If I get another block I will have it sonic checked in front of me and see if we can possible bore it out that much and maintain its reliabilty.
