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B2 Motorsports 369ci SBF Dart Short Blocks....
This would be a sweet little foundation for a 289 style Cobra build. Based on a Dart SHP 8.200" block, 4.155" bore, 3.400" stroke. Appearing externally as a 289-302 sized engine, but having the power potential of a larger Windsor.
Included: *Dart SHP cast iron 302 block *Fully machined/prepped *Scat 9000 series 3.400" crankshaft *Scat forged I-beam connecting rods *Probe forged pistons, 20cc dish (10.25:1 with 60cc heads) *Clevite main/rod bearings *Mahle moly rings *Ford Racing double roller timing chain *Ford Racing cam thrust plate *ARP camshaft fasteners *Comp Cams or Bullet hydraulic roller camshaft *Camshaft degreed/installed *Rotating assembly internally balanced *Short block fully assembled, balance & build sheet included $4899 Other options available including a Scat forged crankshaft, solid roller camshaft, etc. |
Brent,
Do you Crazy Glue the oil rings to keep them from falling out??:LOL: Do you notch the block at the bore bottoms? Is the Dart deeper than other 8.2 blocks? |
JB Weld works wonders... :D
I've never had a Ford Racing block in here, but the complaints I've heard about the pistons coming too far out of the bottoms of the bores were on those particular blocks. However, I've never seen it in person, so I can't really comment on that combination. I see no issues with the Dart blocks....same results as with a regular production block. The oil rings have to have support rails, but there are gazillions of 331's and 347's out there running around without issues. The Dart blocks are good about already being clearanced on the bottoms of the skirts. I've had up to 4.100" crankshafts in their 351W blocks without having to touch them. Of course I always double check just to make sure. |
World used to build a 371" 8.2 and they had to add material to the molds at the bore bottoms and notch accordingly. Dart's are better in that regard.
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That's what I'm talkin' about...
I am considering one of these babies... or maybe a 331 for my 289 car. Hard to decide... thanks for answering all my questions, Brent. (I'm sure I'll generate more:eek:;)) You are a wealth of information. As a fellow engineer, I really appreciate that a guy with a mechanical engineering background and degree is so pumped to talk performance engines, and can explain the different permutations so well.
Last week, I saw the 427W you did for Mark Kassab, and heard it run. Looks awesome and sounds even better... VERY IMPRESSIVE:D! I'm sure his Mustang project is going to be spectacular, as well. Great work! |
There is no substitution for displacement but maybe a 352 (doesn't sound as racey) with a 3.25 stroke could keep the ring lands intact, and RPM quicker?
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Rick, if it were a daily driver meant for 200k miles, I would probably reconsider, but on a weekend toy, I see no reason to worry about oil rings and support rails.
As I mentioned up above, the number of Cobras, Mustangs, and other Ford street rods running around with 347's would probably astound all of us. Shoot, even the Boss 529 that I just built with a 4.420" bore and a 4.300" stroke in a 10.300" block used support rails for the oil rings and that's not even the largest stroke that you can get for a 460. I think personally, for the same money, I'd rather have the extra horsepower and torque. |
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