How to Install ½" Head Studs in a Dart LS Next Engine Block
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- Опубліковано 4 жов 2022
- Ever wondered how an engine block is converted to using ½" head studs. Follow along and find out as we go over the process of converting a Dart LS block to ½" head studs for our Project Orange Blaze engine build.
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Yolls way works without any engine dimensions to go off of. I used to do it that way and it worked fine most times. Once i started swappin heads and movin head bolt holes i learned to locate with blueprints. Locate hole drill hole 1 in #8 the same, then i adjust the table on the Y (left-right) as facing machine, to the last bottom bolt hole in #2 using the indicator on the table, say like 18.025, and i drill the hole as if there was not a hole to begin with. Ive found cast blocks of all qualities off by substantial amounts. Once i changed to locating off of dimensions, my heads fit better with studs being actually square to the deck. Head gaskets dont seem to fight as much on dissasembly either. Typically most builds have a larger level of tolerance to allow machining abnormalities without much negative consequences. Thanks for sharin. I never seen an ls 1/2 conversion
Tap should be in a collet, and you leave the belt loose to slip when the bite is too heavy.
How much extra work needs to be done to the heads to accommodate the bigger nuts?
Just depends on the heads but most of the time it's just drilling the bolt holes larger to fit the 1/2" studs
Typically how much is this service?
It’s typically $450 for the ½ head stud conversion and that includes machining the holes larger in the heads as well
I was under the impression you could already order the Dart Pro with 1/2" studs...
You can but it takes a little longer to get the block than if we get one off the shelf and do the machine work ourselves.
You will be better off using a pricey spiral fluted tap. The cheap plug taps don't do a very good job and wear out quick.
Do you never do the outer bolt holes with 1/2" studs? So all 6 bolts per cylinder are 1/2" studded?
Also.....How did you use the drill bit to spin the tap in under power, can;t that risk stripping the hole fast? I saw it wasnt totally tight and it was slipping while spinning, is that the key, so it kind of grabs a little at a time and slowly takes little bites as it taps into the hole?
There's just not enough material in the outer holes to drill them out to 1/2". Yes power tapping can strip a hole quickly if not done correctly. A chuck typically cannot hold the tap well enough to keep it from spinning which is the biggest key to power tapping. It's very similar to how tap holders work for cnc machines.
OK, cool, thanks for the info.@@pageracingengines