To be fair, the 427 and 363 have the same bore - at least the most common variants do at 4.125. A dart block will take a helluva lot more than that.I’d imagine that a vacuum pump won’t discriminate between the two engines. What’s good for the big engine, is equally good for the smaller one. A vacuum pump usually goes hand in hand with any race engine built with low tension rings, regardless of the power adder. A vacuum pumps’ primary purpose is for crankcase ventilation, NOT to suck oil to the rings Nor to provide vacuum for you PBB.
And as to your question about which is a better engine, Hands down the 427 is. Better Rod ratio, not a maximum over bore, better piston ring land design, buttloads more power with less effort.......No contest.
Same bore different stroke . I’d build a 363 if it were me . I was supposed to get that but we won’t go into how that happenedMight as well do a big bore 363 in a 8.2in deck Dart block. I think the same crank from a 347 is used with bigger bore. Not as involved as a 351 swap.
The 363 - The Hottest Ford Stroker - Hot Rod Magazine
News flash: Bigger bores mean more displacement. Enter the 363 Stroker. We call upon ARP, Dar, Edelbrock, Fel-Pro, Holley, Milodon, MSD, and Summit to help us check things out. Let's hope this leads to something astounding. - Hot Rod Magazinewww.hotrod.com
Yup . 8.2 is 4.125 , 5.400 , 3.400 . They make some power !!I've never built a 8.2 based 363. The 351 block has a taller deck and needs a different ratio.
AMENI've still yet to see anyone come up with a good explanation of why anyone would need a 427 over a dart 363 in a street car when running an aspirated engine.
What, so you can run like 3 pounds of boost less?
At this level of build, that number is negligible. If you were talking a stock 302 bottom end, a few lbs is a lot, each one creeps you closer to some level of risk, that's a time when lower boost matters.
I still believe the 351 adds complexity and cost, without really giving anything in return.
You want the 4.125 Dart with the Siamese bores. Youre not going to get 363 inches out of a 4.000 bore dart block. If youre planning on a 363 youd want atleast the 190s but a 205 11r would fit the bill .This is interesting to read bc I’ve now been contemplating a stroker. Came across a new dart block but it’s the 8.2 4.00 bore and not the mentioned 4.125. Can one not stroke this to a 363 or would that be pushing the limits? I wanted a 347 but thought well why not 363? Go figure!! A buddy of mine is all about NA big blocks, and is always pushing me to do a 351 based 408 or 427, but then I’d have to swap all my goodies to accommodate the 351 motor which I’d rather just transfer what I can over vs having to buy new intake, headers etc. So I run TFS 11r190s and on lmrs page they have 2 363’s motor a ford boss and dart. The dart 363 specifically says that this motor will not work with TFS twisted wedge heads. Is this only bc of the pistons that this motor comes with? Back to the beginning here, on that dart shp 4.00 bore is this a good block to pick up in regards to stroking or is the 4.125 better?
They’re the exact same block. Both can be taken to near 4.200 and are Siamese boresYou want the 4.125 Dart with the Siamese bores. Youre not going to get 363 inches out of a 4.000 bore dart block. If youre planning on a 363 youd want atleast the 190s but a 205 11r would fit the bill .
For some reason i was always under the assumption that they were two different castings I don’t know why , I stand corrected on that one !They’re the exact same block. Both can be taken to near 4.200 and are Siamese bores
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