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Gm bowtie blocks ARE pretty damn good,... I have seen them take alot of shit.......1200 hp and 8500 rpm

Both together
 

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EFI/N2O JUNKIE
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17,767 Posts
I have an old GM Bowtie SBC. Don't like the rear main seal adapter deal, but thankfully it has not leaked! Made over 750 passes on the stock bore. Recently honed it .005 over for new slugs. No complaints here at all. Pushing between 600hp and 950hp, depending on N2O or not.
 

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Discussion Starter #8
I have an old GM Bowtie SBC. Don't like the rear main seal adapter deal, but thankfully it has not leaked! Made over 750 passes on the stock bore. Recently honed it .005 over for new slugs. No complaints here at all. Pushing between 600hp and 950hp, depending on N2O or not.
What casting number is yours?
I am going to look at an bowtie engine & wanted to know which bowtie blocks are the strongest.
 

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the full casting number is 10051184 ...part number for block with splayed billet caps 24502503 in the gm performance book rated at 700
 

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Discussion Starter #13
The bowtie engine I am going to look at puts out around 800hp & in the future if I add 100 or 200hp. I'm up to 1000hp.
Is there a bowtie block that can handle this much power?
 

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Discussion Starter #16
Leaving early in the morning to check out the bowtie engine, just want to make sure it is splayed mains.
The block is about 10yrs old, don't know if they changed casting number back then to now?
 

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Hey Greg my 184 block has splayed mains .Great block no concerns here
Same here !!
184 block, all five mains have four bolts, the center three caps are splayed.
 
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