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I am late to the Poly party but am here to encourage my friend J.C. and anyone who is interested in building a Poly engine as it is a unique but worthy and rewarding endeavor and we make HUGE average HP & torque with paltry performance parts; IE.

390cid Poly Stroker motor:
4" LA Stroker crank
SIR forged rods
234 @ .050" Hyd. flat tappet or [Email]244@.050"[/Email] Solid flat tappet cam
9.5 to 1 compression w/forged Poly pistons
1.94/1.60" stainless oversize valves
211/164cfm intake/exh. flow @ .500" lift w/stock 1.5 adv. rocker ratio
Ancient 1957 Plymouth cast iron Poly dual quad manifold w/500cfm Edelbrocks
Homemade 1 3/4" Tri-Y style headers
Electronic Ignition with 16deg. initial & 34deg. total advance w/91 octane unleaded swamp water fuel...we achieved the following power:

On the engine dyno (break-in numbers only and not fine tuning) we made peak numbers of 412HP @ 5300rpm and 440ft.lbs. torque @ 3300rpm which is nice but the AVERAGE power is where the Poly shines - from 3500rpm to 5500rpm (you can't hurt an engine at that low RPM range) we AVERAGED 375HP and 428 Ft.Lbs. of torque...and still made 391HP at 6000rpm. Those numbers make power EVERYWHERE and will throw you back in the seat and keep you there. We are making about 300ft.lbs. of torque off-idle and about 360ft.lbs. @ 2200rpm and it just climbs and hangs there.

However, for the aspiring Hot-Rodder with more discretionary income we do have some "trick" HP parts to make 500-600+HP but it depends on your goals. We also have some future R&D that promises to make much, much, more power but those parts will be designed to blow away some powerful B/RB/and Stroker Wedge engines...but for now we can easily satisfy anyone wanting to make an easy (and HONEST) 420HP & 450ft. lbs. of torque with a "boat anchor" throw-away motor where the cores are "free" and there is no added expense of fabbing & modifying your B-body to accept a Big Block (Big Block Mopars are KILLER engines and if that is the route you want to take, we will applaud & watch you trounce the "other" guys at the finish line - no insults here in our Mopar family).

We are approximately three weeks away from finishing the first New Poly aluminum 4bbl. intake manifold in 50yrs. and it is a true High Performance dual-plane intake with modern design enhancements; generous plenum for all HP power levels, tapered & pressure matched runners to prevent A/F pollution of the intake charge during high cam overlap conditions...tall sloping runners designed for velocity and delivering the air/fuel charge as a "straight shot" to the back of the intake valve...

We also have T&D bolt on Poly Roller Rocker setups, TTI full-length Poly Headers, High Flowing Gregg Hekimian CNC ported Poly Heads and other great Poly performance "trick" parts...Hekimian Poly Head Flow:
28" of water
intake 1.94" exhaust 1.625"
11/32" stems
.100" 75/63
.200" 158/105
.300" 218/130
.400" 241/171
.500" 250/192
.550" 256/198
.600" 260/201
.650" 264/205

Take care,
Gary Pavlovich
glpavlovich@cox.net

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