Let's have a discussion. IS .040 over to much for a boosted motor?
#1
Let's have a discussion. IS .040 over to much for a boosted motor?
So as some of you know. My block took some scaring and I am considering boring it out to .040 over. I have heard an entire fleet of sides on this. Some say no issues what so ever. Others say NO WAY. Yet I have yet to see any FACTUAL reason why nor has anyone showed any proof of issues w .040 over. Let's have this discussion. I already have another stock block on the way to me. I may just punch that block to .020 over and run or maybe I will run this 1 at .040 over. I would LOVE to hear some ideas or better yet proof as to what is so dangerous and why YES or why NOT. I've spoken with a few machine shops local and abroad. There does not seem to be a general consensus. To those against. The idea I am getting is either A: the sleeve is too thin and will crack (yet no one seems to know of a cracked sleeve of any kind under 8-900whp) or B: it will cause more heat on the coolant and cause cooling issues. I would love to have and more so hear from those more knowledgable than I.
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#8
New Member
iTrader: (23)
True, it's also 50+ year old Technology and is a Sand Casted Block.
Meaning, that the Cores used in the Sand Casting Process can shift or move as much as .060" or more.
.030" over is the first size available back then. Then .060", and then .090"
Meaning, that the Cores used in the Sand Casting Process can shift or move as much as .060" or more.
.030" over is the first size available back then. Then .060", and then .090"
Last edited by OldManZ350; 12-07-2015 at 06:53 PM.
#12
Registered User
iTrader: (2)
Nobody even knows what you're talking about.
LSX and SBC machining clearances for sleeves are different than VQ35 clearances. As in how much you can take out of one sleeve is different than the other.
You do this kind of thing a lot man. I'm not upset, and I don't think anyone else is, but you find really weird and non-nonsensical ways to buttheads on here.