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Thursday, February 17, 2011

Hemi 426 vs. boss 429

Durring the early 70's nascar was using bigblocks in the stock cars,chevy with the 454 and hemi was on top with the monster 426. but up until the mid 70's Ford was the underdog with thier 400 so they desided they needed to step it up, so they came out with the the boss 429.when the nascar officials seen this they decided to pull the plug on the big blocks  and switch over to small blocks, before the boss 9 ever had a chance against its mopar and chevy compeditors.
now in my opinion being a mopar man myself the boss 9 was a powerhouse but it probably  couldnt out run the original 426 hemi.  nearly 25 years later the legandary NHRA engine builder john kasse wanted to see if the boss 9 could actually do wat Ford said and run the 426 hemi into the ground, so he recreated the boss 429.The race between the boss and the hemi was actually a pretty even race. who'd a thought ford had such a good thing going for them but it never even had a chance in nascar.

9 comments:

  1. Excellent and decent post. I found this much informative, as to what I was exactly searching for. Thanks for such post and keep it up.


    www.gofastek.com

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    1. Not 70's, late 60's. Ford tried with another Hemi engine called the 427 SOHC "Cammer", but NASCAR nixed it off the bat in 1965 and it ended up being used in drag racing. Ford had the 427 wedge that dominated NASCAR even with Chrysler's Hemi, with the exception of 66, 67 and 70 were Chrysler's only years dominating with the Hemi. Ford Dominated the 60's with their 427 FE wedge engine and the Boss 429 in 69. 1969 was Fords last year supporting NASCAR until the 80's. After 1970 Chevrolet dominated NASCAR.

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  2. This is a great website, so many people need this information, thanks for providing it.

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    www.imarksweb.org

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  3. This is entirely wrong, Ford began racing the Boss 429 engine in Nascar in 1969 and kicked the CRAP out of the Chrystler 426 hemi cars. The 429 was a more powerful engine and it was lighter, it was the best big block racing engine ever made.

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    1. I agree, Boss 429 was the most powerful hemi ever !!

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    2. NHRA changed their rules to exclude the Boss 429. They set the maximum bore spacing limit to 4.84" which cannot be adjusted. For reference, Mopar 426 hemi is 4.80", Big Block Chevy is 4.84", and Ford Boss 429 is 4.90". Ford got excluded.

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  4. This is entirely wrong, Ford began racing the Boss 429 engine in Nascar in 1969 and kicked the CRAP out of the Chrystler 426 hemi cars. The 429 was a more powerful engine and it was lighter, it was the best big block racing engine ever made.

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  5. According to Robert Yates - the guy that R&D'd the 429 for Holman Moody the Boss has about 10 HP on the Hemi out of the gate and was 100 pounds lighter. The winged Mopars kept things close - in 1971 when the "special" speedway cars were baned they also restricted all the big block motors - essentially choking down the Hemi and Boss so the GM junk pile 427 had a chance to keep up.

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  6. The HEMI and the 427 were the king, and they still are when it comes to classic muscle cars.

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