Results 21 to 40 of 53
Thread: B-Bodies or Chevelle?
-
07-11-2014 #21
Registered User
- Join Date
- Apr 2005
- Location
- Colorado Springs
- Posts
- 760
I stand corrected. Hotchkis and Schwartz make chassis components for all makes. I suppose we could also include Comp Engineering and Alston in that list.
However, except for Hotchkis, most of those components require more than simple bolt on modifications. If you are going for an all out upgrade, that may be fine. If you want to retain your numbers matching muscle car and step up its performance, then a bolt on approach may be more desirable.
Even a Gremlin, now that's thinking outside the box! :-)
Yes, and these have been available since the early 70s. However, the Hemi was already so well established in Chrysler architecture and all the racing after market was built around its design, so the Arias heads never caught on.
Remember, all OEMs were working on Hemis during the muscle era. This is one instance where Chrysler was actually ahead of the curve. While Zora Arkus Duntov (father of the Corvette) made Hemi heads for the flat head Ford all the way back in the '20s, they were not an OEM option and never caught on big. When Chrysler first introduced their first Hemis in the early 50s they were the first of the Big 3 to offer them to the general public and produced them in volume for 5 years. Their high output power made them the preferred choice for drag racing but their heavy and expensive design made them a production nightmare, so they stopped them in production cars. Even the Adrun Ford heads had any number of problems with their design that limited their production from ever catching on in a large scale. By then the Big 3 were deep into OHV engine production, so the flatheads slowly faded away as a performance engine.
By the mid 60s Chrysler decided to resurrect the Hemi as a race only engine. Since the heads are the key to it, the designed a new head and slapped it on an existing block to rush it into production. It was so successful that many sanctioning bodies then demanded it become a production engine available to anyone in an effort to make it available to more drivers, so it began production for passenger cars. Once this happened, Ford and GM were now behind the curve in the horsepower wars. Ford answered the call next with the 427 SOHC Hemi or "Cammer" and the Boss 429 Hemi. To stiffle the SOHC entry into competition, Chrysler began working on a DOHC Hemi. To avoid an escalating horsepower race, Nascar banned the Ford SOHC and Chrysler dropped development on the DOHC. Ford did go into production with the Boss 429 which found its way into many Ford products during that time and the Cammer was used for some time in drag racing. But high production costs and engineering weaknesses prevented them from becoming very prolific.
Pontiac was working on a 427 Hemi design on the GM side during this time. However, the extended development time it took and the politics of the GM heirarchy were such that they didn't have a working prototype until the end of the era was all but sealed. Rising fuel costs, rising insurance costs, more complex racing body rules, and the expense of Hemi production all killed off the GM effort. Similarly, a lower cost Chrysler ball stud Hemi design, actually somewhat similar to the Chevy big block, also died. By this time, the 426 Chrysler design was so entrenched in drag racing, that the efforts of Arias were more of a blip on the radar instead of a horsepower revolution. In this instance, it actually was cheaper and easier to run the Chrysler engine compared to the GM, which required a considerable amount of custom parts only available from one company.
The efficiency of the Hemi design has found its way into may other manufacturers since, predominately none US based, and has evolved into many different SOHC and DOHC, over head cam designs. You will be hard pressed to find a 4 or 6 cylinder engine design that doesn't have opposed valves and at least a semi hemispherical combustion chamber these days. However, Chrysler had trademarked the "Hemi" name some time ago so no one can use it in any mass advertisement of their engines. So even though you can build a hemispherical headed Chevy, in the mind of many enthusiasts , as well as in the legal system, it can't be called a "Hemi" per say.TonyC@HP2




Reply With Quote