dooe-r timming
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dooe-r timming
Working on a 557 with dooe-r heads in a rear engine dragster (bracket car). On race gas @ 14.5 compression, what is best total timming for the old school, cast iron heads?
I have seen dyno sheets @ 44 That I find hard to believe, bsfc was over 1.
Can anyone give me any insight ?
TIA Charlie
I have seen dyno sheets @ 44 That I find hard to believe, bsfc was over 1.
Can anyone give me any insight ?
TIA Charlie
mach1charlie- Posts : 38
Join date : 2009-08-15
Re: dooe-r timming
Thanks Lem, thats what I expetced, all my chevy buddies looked at me like I was nuts !
Charlie
Charlie
mach1charlie- Posts : 38
Join date : 2009-08-15
Re: dooe-r timming
With a good intake, a lot of cam and dome for compression in a small motor w/big bore. 35 has usually been the max. Generally around 33* is the sweet spot, maybe up 1.
Tell the Chevy guys you don't need 50cc of mountain for the flame to climb over!
Bret
Tell the Chevy guys you don't need 50cc of mountain for the flame to climb over!
Bret
Bret Powell- Posts : 133
Join date : 2009-08-30
Re: dooe-r timming
Bret Powell wrote:With a good intake, a lot of cam and dome for compression in a small motor w/big bore. 35 has usually been the max. Generally around 33* is the sweet spot, maybe up 1.
Tell the Chevy guys you don't need 50cc of mountain for the flame to climb over!
Bret
or have a 120cc's of valley for the valves and spark plug to hide in.........
dfree383- BBF CONTRIBUTOR
- Posts : 14851
Join date : 2009-07-09
Location : Home Wif Da Wife.....
Re: dooe-r timming
I can't see 44 degrees being right for any engine unless the pointer is not correct(most likely). I can't believe that 33 degrees would be far from optimum one way or the other.
DaveMcLain- Posts : 399
Join date : 2009-09-15
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