300 Inch Chrysler Hemi

[Troy Cagle]

Could someone please let me know who remembers what to do to build one for Fuel, idle only, cacklefest deal?.
I've got a very nice WE55 3-5/8" block, crank and cherry 354 heads. I realize alum. rods wont go in from the top & thats not a problem.
Thanks for your time & help,,,,and again, this is not for racing or will it be leaned on.
Troy

[Freud]

Related to Gary Cagle?  He was 300 incher for a long time.

FREUD

[jdincau]

It's been a long time (1968) but a couple of things I remember are; grinding reliefs (or chamfering the bore) to clear the valves, replacing the stock oil pump pickup with a Milodon or Donavan piece and putting a vented plug (also Milodon or Donavan) in the oil passage in the block at the pump output to convert to full flow oiling. If you are referring to the tuneup, I haven't the foggiest.

[SPARKY]

Removed by me because I posted before checking my Senior memory  or my early Chrysler facts.

[Freud]

If crowd entertainment is the goal flames out the exhausts are required. That's tune up related.

It matters not which block you use. A blowup will drew uncontrolled crowd reaction.

That way a block that could be a racer wouldn't be sacrificed.

FREUD

[RichFox]

Kind of my feelings. You have a '55 Windsor block, I guess. Or you could sleeve a 331 to the 300 size. Or destroke it using a Pontiac crank like I said before. But if it's just to lite the candles, burn some Pop, and make noise, Why not just take the easy way out and use a 331? Sell the 300 parts to some racer who needs a D motor.

[salt27]

No need to move along, you're breaking the boredom.

Do you have any pictures to show us?

[jdincau]

And I seem to remember the cams were different 331 vs 300/354 vs 392. We used stock forged rods, shot peened but that was a blown gas motor. I think the fuel guys used Don's boxed stockers.

[SPARKY]

Al Eshenbaugh's  D/FL #36 that just started running this combination.  He has late model heads but he is running the  Windsor block---

[panic]

The tappet bank angle is different between low-deck and high-deck Chrysler Gen-1 hemi/poly engines, there are 6 different cams as to OAL and lobe placement (in addition to different grinds) and each is unique. There are also different nose drive methods.
Dodge 241, 260 (a.k.a. 259), 270: 65 degrees
Dodge 315, 325: 58 degrees
DeSoto 276, 291: 64 degrees
DeSoto 330, 341, 345: 60 degrees
Chrysler 301, 331, 354: 61.5 degrees
Chrysler 392: 59 degrees

[SPARKY]

Rich that crank must have been Pontiac's 1969 303 displacement ---that was not a factory production option---Trans Am Racing eng crank that had a 2.84 stroke that produced 303 displacement.

[Stan Back]

I'm with Rich.  Grind and fill the ID #, let them worry about the displacement.  When was the last time they checked displacement at a cackle-fest?

[RichFox]

i am no math wiz. But when I put the stock 331 bore of 3.815 with the 55-56 pontiac's stroke of 3.250 I get 296.73 cid. a .040 clean up bore comes out to 303 inches. Correct?

[SPARKY]

    your math beats my math lol   

the 326 crank would be much easier to come by 

I keep trying to get there with the "killer" LS heads

[RichFox]

326 has a 3.750 stroke. Same as a 400. Not much help. I think it's pretty much a 55-56 Pontiac 287-316 crank for this deal.