Re: Red Ram Hemi

[Follow Ups] [Post Followup] [Dodge Power Wagon Forum]

Posted by MoparNorm on Tuesday, June 26, 2001 at 9:45AM :

In Reply to: Re: Red Ram Hemi posted by RDavis on Tuesday, June 26, 2001 at 8:24AM :

Hi RD,
The HEMI was very expensive to build because the heads used a double rocker arm and shaft system to take advantage of the hemispherical combustion cambers. That is why the spark plugs were in the center of the head. Mopar went to the Poly heads to lower production costs. The Poly was basically the HEMI block and HEMI heads, BUT with only one set of rockers, this placed the spark plug back into a more conventional position. Poly production cost was still higher than Mopar could afford, based upon sales, so in 1967 the Poly was discontinued in favor of the Wedge. Less performance than the Poly, but lower weight and lower production costs. However you have to install high dollar, trick, Mopar Performance Heads to make an 'LA' flow as good as the stock 'A' Poly, HEMI type heads.
MoparNorm

The 61- 71 Dodge Truck Association

Follow Ups:

318 LA outperforms 318A poly... - Fred Coldwell 11:12AM 06/26/2001

Re: 318 LA outperforms 318A poly..www classic hemi - Mike M. 1:09AM 06/29/2001

1957-58 truck 315 poly numbers - Fred Coldwell 12:49PM 06/29/2001

Re: 318 LA outperforms 318A poly... - MoparNorm 5:39PM 06/27/2001

Re: 1968 net HP is 177 - Fred Coldwell 10:25AM 06/28/2001

Not so fast... History of HP nosedive in 1973... - Brian in Oregon 5:49PM 06/27/2001

Wasn't trying to start a fact feud, just curious - - - - RDavis 11:54AM 06/26/2001

But... - Brian in Oregon 1:11PM 06/26/2001

Re: 318 LA outperforms 318A poly... - AAA 11:22AM 06/26/2001

Re: 318 LA outperforms 318A poly... - arne 0:29AM 06/28/2001

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