SoCal Jet Boats
Tech Talk => Engine Mechanical / Electrical => Topic started by: GAWnCA on June 17, 2009, 11:28:01 PM
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Just a quick question... What is the difference between 18* and 23* Chevy heads? How do you tell the difference?
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I believe it's the valve angle in relationship to the bore..................the price tag
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Would the number on the heads tell the information needed? I think they are "Bowtie" heads?
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yes, I think you'll need a manifold and maybe other related valve train components with them.
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If they are bowtie heads then all you need is a manifold I believe the valve train all works out
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I just need the information for adapting Stahl flanged headers to the Chevy Heads.
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Greg post some pictures here some pictures of some bows in my shop the ex port are all the same now if you have sb2b heads or real race heads there split ex ports and intake like Cleve ford has and dizzz is in front they got it right finally and know longer to be in
the performance parts, the heads in the picture have the guides moved or off set for a bigger valves and to help in the push rod set up they will use split guide plates or two piece, picture of the headers to would help the chamber in these heads have been laid back to.
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The motor is at JBP. SO I can post a photo but you can what I know by looking and the 3rd photo here.
http://www.socaljetboats.com/index.php?topic=7095.0
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do you have pictures of the Stahl flanged headers to the Chevy Heads. am not
up on them :banghead: any small block header that is port matched to heads will
work i f the ex port is opened up to same size.
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I'll run over tomorrow and take a photo of the Stahl header flange. They want $118.00 for the adapters but I needed to know (their question) the head degrees. That was a new one on me. It's been about 40 years since I messed with Chevy motors.
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thems are 23 deg heads 18deg are mostly after market heads and 5 deg is not
that mutch in header deg he probley has + or - 2 deg in his jig. and 10 deg if made
mexico or chino.
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That's what Quickjet said as well. SO I guess I'll take the chance and order up the adapter plates and be ready for the motor when Tom gets around to being able to send it. Moving is a PITA.