Re: [Amc-list] AMC 304 V8 Stroker Build (327-cid AMC V8!) - Final Answer

[Davis Martin <martin-davis@xxxxxxxxxxxxx>]

The edelbrock Heads would not be a direct fit on a 304 the valves would hit the block due to the small 304 bore size.  
stover@xxxxxxxxxxxx wrote:
  Not that it's crucial regarding what your engine is with the parts and
modifications it has but you are comparing apples to oranges when
comparing a mid seventies or later 360 rated at 160 horses net to a 210 to
225 gross horsepower rated 2bbl or 4 bbl 304/290. The 304 net with the
'70/'71 higher compression probably netted out at 132 to 135 maximum.
The stroker aspect with the fairly light pistons is a reasonable combo
for revvability. Optimise the flow/velocity through the heads and you
can get decent power. Personally I'd use the Edelbrock heads because
they have a superior detonation threshhold ( not holding up better once
it occurs but that detonation would occur under higher compression )
and a combustion chamber shape that promotes higher cylinder pressure.
You could get higher velocity flow and more flow at low lifts- though
you should shrink the valves down to 194ish/150ish and get get max
airflow through lift. Also the 50 lbs weight savings is that much less
weight to work against. True, they ain't cheap- but unless you've
ported iron heads already the difference is about 7-8 hundred.
Regarding the 290 SS/AMX- he's revving the pee-pee out of the motor and
if everything else were equal on the 401 equipped AMC's he wouldn't be
beating them.
Steve


Hi Davis,
I am building the 304 stroker, because I have nearly ALL of the parts
for it, and they are nearly ready to go together, and so, the trouble
and expense won't be all that much 'now', as compared to doing a 360
(which I have) or a 401 (which I don't).

I began engineering that stroker engine 12+ years ago and want to finish
it and get it running. It's been moth-balled for about 9 years, since
the twin-turbo race car project was nixed ... and it's time to finish
it.

Were I to start with the current 360 in my Jeep (60K on it), the cost
would be A LOT higher in rebuilding, especially to the specs that the
304 is built to. I looked into putting the 390 crank/rods into the 360,
to make a 383" stroker, but I would have more $$ to put into the 360
block to prep it. The 304 block is nearly done and the build up is
internally balanced, weight-matched on components and should make more
power than most would expect. Garrett Ghezzi's SS/C '69 AMX with a 290
v8 (0.060" over) can attest to that. He's pushing close to 480 HP and
just under 400 lb/ft torque with a super stock engine & square port '69
heads. He routinely beats out 401-powered AMC's with that car.

While I don't expect my stroker 304 to make that kind of power, I am
estimating that it will be in the 275-300 HP range and torque should be
quite nice for the Jeep.

Please note that my current 360 makes about 200 HP roughly, with 4-bbl
carb/intake, headers & single exhaust and a stock 8.25:1 producing a
whopping 160-hp (stock). The stock 9.0:1 304's made 210 hp and 10.0:1
290's w/4-bbl made 225 hp.

Sincerely,
Greg Taylor

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