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Old 02-03-2019, 04:08 PM   #1
odds&ends1762
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Default Legal Heads for SS/modified

So I acquired a couple new combination possibilities. One is a 315" sbc that was originally in a C/EA car in the early 90's. Has Pontiac aluminum heads and composite Intake from Brandywine. Its all fresh, just old technology and it was cheap enough to try it out. I believe Brodix cast them back in the day for NASCAR or something. Are these a legal head for say SS/BS or CS? Also, I have a top end complete SB2.2 for this shortblock after I change the necessary components. I was also wondering where that would fit in. If It would be legal in BS or would I have to go into say BM? I have sent a email to tech, but I have not received an answer. Just curious if anyone could help me out.

Thank you
Cory
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Old 02-03-2019, 05:04 PM   #2
FireSale
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Default Re: Legal Heads for SS/modified

SS/CS is cast iron in line valve heads only. Aftermarket heads need to be on the NHRA Accepted Product List. GM and Pontiac are listed separately so I don't know if you can run Pontiac heads on a Chevy. The national record holder in CS is a 302 Ford running NASCAR iron short track heads. They aren't listed but have a factory part number.


Aftermarket aluminum heads, inline or canted, are allowed in SS/BS. Watch out for the Hancock and Lane car from D6 if you build this.


EDIT: I had difficulty getting responses from tech out here on the West coast for Super Stock Modified classes too. I didn't go ahead with my build until I found the Canadian car I referenced above on Facebook, CR and in the NHRA record book. It's a weight to HP group with few engine and valve restrictions.
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Old 02-03-2019, 05:36 PM   #3
LB Racing 3179
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Default Re: Legal Heads for SS/modified

The Pontiac heads were made for the small block Chevy and are legal in Modified. I use the Buick head on a small block Chevy which is legal in SS Modified
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Old 02-03-2019, 05:49 PM   #4
LB Racing 3179
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Default Re: Legal Heads for SS/modified

The Aluminum heads would be legal in SS/BS.
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Old 02-03-2019, 06:43 PM   #5
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Default Re: Legal Heads for SS/modified

Can run SS/BS with either cylinder head, or run SS/AS with the SB2.2.
Can also run SS/AM thru SS/FM with both heads.
Canted valve allowed also in SS/AM and SS/BM.
SB2.2 is a splayed valved head, not canted.
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Old 02-04-2019, 03:52 AM   #6
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Default Re: Legal Heads for SS/modified

I think the 2016 Div 4 SS champ ran a small cu in SB.2 engine in SS/BS.
Two sets of headers came with the car. Looks like a 15-18 deg set and an SB.2 set.
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Old 02-04-2019, 08:58 AM   #7
R Lowry
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Default Re: Legal Heads for SS/modified

SB2 is a canted, not splayed.
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Old 02-04-2019, 09:44 AM   #8
odds&ends1762
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Default Re: Legal Heads for SS/modified

Thank you for all your replies. I really appreciate the info. Now to get it together and make some noise
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Old 02-04-2019, 02:30 PM   #9
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Default Re: Legal Heads for SS/modified

Quote:
Originally Posted by R Lowry View Post
SB2 is a canted, not splayed.
He is asking about the SB2.2, not the SB2.

SB2 valve angles are 12° x 4° Intake and 8° x 0° Exhaust and considered Canted.

The SB2.2 valve angles are 11° x 4° Intake and 8° x 0° Exhaust and considered Splayed with all the intake ports pointing towards the center of the cylinder head.

The 8° Exhaust valve angles towards the intake manifold just like a normal wedge cylinder head.
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Old 02-04-2019, 05:50 PM   #10
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Default Re: Legal Heads for SS/modified

Thanks, did not know that!
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