Difference in Cowl Induction Breathers (Z28 vs SB) - Team Camaro Tech
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post #1 of 12 (permalink) Old Jun 15th, 15, 04:23 PM Thread Starter
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Larry
 
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Difference in Cowl Induction Breathers (Z28 vs SB)

I notice there are two breathers listed for the cowl induction hood breather for a 69 Camaro.

I'm trying to find out the difference. Could it be the Holley carb on the Z and a Quadrajet on the 350? If so, what is the difference?


http://www.camarocentral.com/1969_Co...8_p/air-41.htm

http://www.camarocentral.com/1969_Co...0_p/air-42.htm
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post #2 of 12 (permalink) Old Jun 15th, 15, 05:19 PM
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Re: Difference in Cowl Induction Breathers (Z28 vs SB)

The difference is due to the carb and intake. I think that the spacer ring for the seal is where the difference comes in to make up the differing height between the high rise intake/holley carb setup on the 302 and the Q-Jet/cast iron manifold on the 350. What are you running on your car? Probably best just to give Camaro Central a call to get the right combo for your ride.

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post #3 of 12 (permalink) Old Jun 15th, 15, 05:33 PM
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Re: Difference in Cowl Induction Breathers (Z28 vs SB)

Correct the spacer is different.


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post #4 of 12 (permalink) Old Jun 15th, 15, 05:52 PM
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Re: Difference in Cowl Induction Breathers (Z28 vs SB)

The bend on the vent tube on the bottom side is different also. BB and Z28 have somewhere near a 45 degree bend but a 350 has a full 90.

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post #5 of 12 (permalink) Old Jun 15th, 15, 07:21 PM Thread Starter
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Re: Difference in Cowl Induction Breathers (Z28 vs SB)

It is a 69 with a 350 (383), Performer Air Gap and a Holley 750. Guess I should measure the height from the carb to the hood. Not sure what this would tell me tho. Guess I'll call and see what they recommend as I dislike sending parts back.

Thanks guy!
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post #6 of 12 (permalink) Old Jun 15th, 15, 08:00 PM
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Re: Difference in Cowl Induction Breathers (Z28 vs SB)

There is an excellent thread here at Team Camaro that details the three versions of 1969 Camaro - Small Block L48, Small Block Z28 302, and Big Block 396, as well as the 70 Chevelle version, including dimensions.

Once you know the distance from carb throat to hood seal then you can see which spacer extension ring, and or intake/carb combinations you will need. You can also have your local metal fabrication shop build you a custom extension ring


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post #7 of 12 (permalink) Old Jun 16th, 15, 05:01 AM
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Re: Difference in Cowl Induction Breathers (Z28 vs SB)

Here is the comparison thread https://www.camaros.net/forums/showthread.php?t=54696

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post #8 of 12 (permalink) Old Jun 16th, 15, 04:26 PM Thread Starter
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Re: Difference in Cowl Induction Breathers (Z28 vs SB)

Excellent information guys, thank you so much. I think a standard 350 assembly is what I am going to order.

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post #9 of 12 (permalink) Old Jun 16th, 15, 07:47 PM
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Re: Difference in Cowl Induction Breathers (Z28 vs SB)

If you have a small block with a high rise aluminum intake, you might want the shorter Z28 extension ring instead of the taller L48 extension ring..

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post #10 of 12 (permalink) Old Jun 17th, 15, 05:17 AM
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Re: Difference in Cowl Induction Breathers (Z28 vs SB)

Or no extensions at all.

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post #11 of 12 (permalink) Old Jun 19th, 15, 09:05 PM Thread Starter
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Re: Difference in Cowl Induction Breathers (Z28 vs SB)

Luck was on my side..... A buddy of mine dropped by last night with his 69 small block. I have never asked if he had the breather under his cowl hood but as it turns out, yes. So, off of his and on mine. No extension needed with an Edelbrock air gap and Holley 750. It mates up perfect. We used some baby powder on the seal and had a perfect imprint on the hood when opened back up. I might add, my engine bay smells like a baby nursery now.

Thanks for all the help guys.

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Or no extensions at all.
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post #12 of 12 (permalink) Old Jun 20th, 15, 01:45 AM
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Re: Difference in Cowl Induction Breathers (Z28 vs SB)



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