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Iron D-Port Heads All iron d-port heads, flow number and performance results

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Old 02-05-17, 04:59AM   #61
rexs73gto
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I've been a member here for almost a year now & this is the 1st time I can say we have some good posts here. For awhile it was a bit on the slim side. I hope it continues so the weirdo's over on that other site sees there losing their member to us over here & they have to realize they don't hold the top spot & they all come over here & then they have to ask/beg everyone to come over there,, LOL , but we will stay right here & enjoy the great post we bring not them. Lets keep it up & hope everyone has more to bring here in all the sections.
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Old 02-06-17, 09:52PM   #62
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Quote:
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Thanks I wasn't aware that the 3 holes in the crank saddle had those 3 holes going to separate areas of the block. I do know about cutting a slot in the bearings but thought it was just for better oil flow & not better to go to all the 3 areas. I will be opening the bearing up to help the oil flow,,, it is 1 of my plans when I get the block back from the shop. Thanks for helping out & letting me know how it is for the flow.
Here's a mode some do to the block fore better oiling....
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Old 02-07-17, 01:16AM   #63
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Here's the bearing mod for that.
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Old 02-07-17, 02:30AM   #64
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Thanks that looks like it would be a good thing for the extra oil for the big crank. Thanks .
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Old 02-07-17, 11:37AM   #65
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I think one could do the mod to the back of the bearing shell if wanted to avoid altering the block..
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Old 02-09-17, 12:06AM   #66
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At least GM caught on. They started doing it right at the factory on the GM 3.8 blocks.
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Old 02-09-17, 01:22AM   #67
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What method do you thing they are using to cut that groove like that ? Milling it or grinding it?
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Old 02-09-17, 04:32AM   #68
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I think you may be able to do that in the block with a die grinder & a 50-60 ths disc. Just have to make sure you clean the block real good after you do that.
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Old 02-09-17, 11:03AM   #69
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I think the GM one that Mb125 posted was casted in.
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Old 02-09-17, 12:18PM   #70
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Charlie you may be right. I will clean it up with some carb clean and see if I can see any machine marks.
They may have cast it that way then machined the mains later.
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Old 02-09-17, 01:47PM   #71
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Charlie you may be right. I will clean it up with some carb clean and see if I can see any machine marks.
They may have cast it that way then machined the mains later.
What block is that LS?
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Old 02-09-17, 06:30PM   #72
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Nope
1999 3.8 v6
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Old 02-09-17, 06:54PM   #73
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Oh ok. Do you know anything about the v6 that came in the CTS Cadillac . 2005 . Looking for a forged lower end for that motor. I was told that its not possible ..
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Old 02-10-17, 02:10AM   #74
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The pic of the 3.8 is most likely cast in but the other pic was a Pontiac block that could have been cut in with a die grinder as it would look like that as you cut it deeper the center would have been deep & the edges would be shallow & pointed from the cutting wheel.
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Old 02-10-17, 11:54PM   #75
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Here's some cool info on what's going on with the oil bearing an journal... Check out the picture and watch the video. It gives you a good understanding of what really is going on with bearing and journal's


https://www.youtube.com/watch?v=7OY170iaGSA
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