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Thread: BOSS 502 Hemi Engine (BOSS 302)

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    Forum Regular fatherprofuel5's Avatar
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    Question BOSS 502 Hemi Engine (BOSS 302)

    OK,I need your opinion on this Ford Small Block,Coy from BRODIX told me to prototype this engine would cost me a FEW HUNDRED THOUSAND DOLLAR INVESTMENT,Here's some of the specs:
    BOSS 502 Hemi Engine Block (502 Cubic Inch)/ (BOSS 302)
    A-356 Billet Aluminum Skirted Alcohol Block
    8-Bolt Mains
    Siamesed Cylinders (?)
    10.200 Deck Height
    4.500 Bore Spacing
    4.200 Bore (Maximum)
    4.530 Stroke
    Reinforced Lifter Valley
    .400 Raised Cam Location w/Wide Pan Rail
    .937 Lifter Bore Housings
    55 mm Roller Bearings
    8-Bolt Titanium Main Caps
    Dry Sump
    Intake Port (H):2.65 x (W):1.88
    Intake Port (H):2.50 x (W):1.75 (?)
    Exhaust Port (H):2.00 x (W):1.75
    BOSS 502 Cylinder Heads
    85cc Combustion Chamber
    2.700 Intake
    2.100 Exhaust
    290cc Intake
    130cc Exhaust
    My question is can this engine be built to the forementioned specs,Here's photo of a stock BOSS 302 Engine Block
    [ATTACH=CONFIG]31412
    Attached Images
    Last edited by fatherprofuel5; 26-01-2015 at 02:27 PM. Reason: photo & typing

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    1 man disaster zone xy-transit's Avatar
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    Default Re: BOSS 502 Hemi Engine (BOSS 302)

    Ummm well if Coy says it can be done I guess so. Apart from that, I really have no idea.

    I take it it will be for competition use?

    What I would be weighing up would be is there a product that would / could be built to suit your needs?

    Would that sort of money be better spent looking at improving an existing product?

    On the other hand would this be a big improvement over what is on offer? And how long would it take to pay off the investment outlaid from sales? Would it be a sole effort or a group investment?

    Does it have to be pushrod?
    plasma cutter + TIG + 2k paint= to infinity and beyond!

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    Forum Veteran Stevo's Avatar
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    Default Re: BOSS 502 Hemi Engine (BOSS 302)

    My opinion? Not feasible.
    Those valves won't fit in that bore
    Titanium main caps. Why? Ti caps will not be stronger than steel or aluminium
    Port volume too small.
    Siamesed cylinders? If this is a drag racing engine, there's no nee for a water jacket, so block can be solid

    I wouldn't invest that kind of money without approval from sanctioning bodies first.

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    Forum Regular fatherprofuel5's Avatar
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    Default Re: BOSS 502 Hemi Engine (BOSS 302)

    Stevo,What I've done is I combined both BOSS 302/429 Cylinders into 1,I was thinking of using the BOSS 429 85cc Combustion Chamber on BOSS 302 Cylinder Heads, compared to 58cc Combustion Chamber,Also u got to consider the 4.500" Bore Spacing for the 4.200" Bore for the BOSS 502 Hemi Engine,The BOSS 502 is a Tall Deck BOSS 302,My question is on the BOSS 502 Hemi Engine be allowed in Top Doorslammer and weight break be with a Small Block compared the Chrysler 426 Hemi



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    Default Re: BOSS 502 Hemi Engine (BOSS 302)

    There is no weight break for engine types, only for supercharger types. The only engine rules are maximum bore space 4.900 in and 5.25 lb/cu for screw type blowers and 4.96 lb/cu for rootes type blowers.

    Note that the ANDRA rules state that anyone wishing to compete in Top Doorslammer MUST apply for a Top Doorslammer Application Pack and that only full ANDRA members may apply.

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