71 429 information
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Laughing Gas
Joined: Apr 2001
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From: West Union, OH USA
71 429 information
I aquired a 71 429 2V. The #'s on the block are C9VE-b. The heads are D0VE-A. How good are these. Also I will rebuild this to drive every day so how can I lower the compression to run on 87 octane.
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Excellent head/block combo, highly sought after by builders.
I would recommend dished pistons to lower the CR. You could go to D3 heads but then you have to not only buy more heads, but the rockers arms and pushrods are different.
Careful cam selection to lower the static CR is also important.
I also run 87 octane in my bone stock '69 429 by retarding the timing, with a subsequent loss of power and economy. It works but it's not the best route.
I would recommend dished pistons to lower the CR. You could go to D3 heads but then you have to not only buy more heads, but the rockers arms and pushrods are different.
Careful cam selection to lower the static CR is also important.
I also run 87 octane in my bone stock '69 429 by retarding the timing, with a subsequent loss of power and economy. It works but it's not the best route.
Last edited by scroob; May 13, 2004 at 05:53 PM.
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Dished pistons in a '71 429 are going to lower the compression from 10.5-1 to about 9.8-1. The power loss is not worth worrying about. The ability to get along with today's pump gas is well worth it. There is a lot of power to be gained elsewhere.
Here's a good site on building BBF engines. The URL is so long it's hard to post at all.
http://www.reincarnation-automotive....rformance.html
Here's a good site on building BBF engines. The URL is so long it's hard to post at all.
http://www.reincarnation-automotive....rformance.html
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Originally Posted by 78Extended
why would you want to lower the compression ratio? you would lose power. i run a 69 429 in my truck on 93 and its fine.
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Originally Posted by fordguy76
I aquired a 71 429 2V. The #'s on the block are C9VE-b. The heads are D0VE-A. How good are these. Also I will rebuild this to drive every day so how can I lower the compression to run on 87 octane.
Dished pistons will put you in the 9.2-3:1 range. With the proper cam and ignition set up, you should be able to use 87 octane, but you will be near the limit. I run my 429's with flat tops, so I can't say where to find dished pistons for them. Maybe Summit or Jeg's can get them. The pistons and crank are what make the difference in a 429 and 460. Dropping in a 460 crank opens up the door to a lot more options, it might be another option. More cu. in. is alway's a good thing.
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Cross-Country
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seems silly
it kinda seems silly to me that someone would want to upgrade to a 429 for more power and than rebuild it without getting the most out of it you can. you might as well leave the original motor in it. neverenough what octane do you run with your flat tops? and at what timming?
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It's also silly to have to pay $2.59 a gallon for 92 octane gas when you don't have to. That's what it costs here. As I mentioned, there are plenty of ways to get awesome power out of a 429 without running high compression.
Also, he never said he wanted to build the motor for more power, but as a daily driver that would run lower ocatne gas.
Also, he never said he wanted to build the motor for more power, but as a daily driver that would run lower ocatne gas.
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Originally Posted by 78Extended
it kinda seems silly to me that someone would want to upgrade to a 429 for more power and than rebuild it without getting the most out of it you can. you might as well leave the original motor in it. neverenough what octane do you run with your flat tops? and at what timming?
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Laughing Gas
Joined: Apr 2001
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From: West Union, OH USA
Thanks for the replies! Yeah, I'm planning on driving her everyday, I guess I could just pay extra for 93, but if I'm going to need new pistons I figured I could get szome dished pistons. And I still havent found any. I really don't want to get new heads or crank.
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Laughing Gas
Joined: Apr 2001
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From: West Union, OH USA
I found some sterling dished pistons. what do you guys think.
http://store.summitracing.com/defaul...stons&x=15&y=9
http://store.summitracing.com/defaul...stons&x=15&y=9