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05-17-2012, 10:46 AM | #1 |
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bowtie heads?
i was all sold on the phase 3 --0034 heads for modified that the iron heads are required, but i see some other numbers that look good for a hi-winding 302. i need your input and suggestions----thanks
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05-17-2012, 09:30 PM | #2 | |
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Re: bowtie heads?
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05-21-2012, 10:44 AM | #3 |
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Re: bowtie heads?
I know that the Comp Cams RHS 14 degree is legal for SS/CS
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05-21-2012, 03:36 PM | #4 |
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Re: bowtie heads?
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05-22-2012, 07:46 AM | #5 |
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Re: bowtie heads?
Comp got the okay last winter, I'm not sure why it's not in the guide, but I know SS/CS guys have bought some, and may be running them. I sure did'nt want them approved because I was in the middle of building a iron headed LS1.
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05-22-2012, 02:20 PM | #6 |
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Re: bowtie heads?
I'd want to see written approval from Glendora before I tried to build and run a 14 degree aftermarket head engine in SS/CS. I have not even seen a written revision of the rule which states "OEM casting,,,,,,, with OEM number cast into head".
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05-22-2012, 03:26 PM | #7 | |
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Re: bowtie heads?
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The cylinder head, P/N 12561873, was only used for two years on GM trucks with the LR4 and LQ4 engines The LS1 cast iron cylinder head is a truck engine cylinder head. Super Stock stock rules say truck engines are prohibited. I am with Alan here, where is the written proof from NHRA? |
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05-31-2012, 09:40 AM | #8 |
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Re: bowtie heads?
I called Chris at comp cams, and the 14 degree RHS head is not legal for SS\CS.
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07-13-2012, 12:21 PM | #9 |
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Re: bowtie heads?
If anyone is interested, we may be liquidating all of our 304" Chevy SS/CS stuff in the near future. We have run Chevy Bowtie Vortec heads from the beginning, and they can definitely make power.
In addition to the conversation though, there are a couple other iron head castings that we got approved over the winter months - but none of them have shown to be as good (or actually available for purchase) yet as the Bowtie Vortec. Mike Mans |
07-23-2012, 04:49 PM | #10 | |
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Re: bowtie heads?
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