One more casting # question, BB!
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Freshman User
Joined: Feb 2004
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From: Phoenix Area
One more casting # question, BB!
Hey BB!
You've been so awesome on answering my questions! You really know your stuff!
Anyway, I just want to find out, what is considered a large port intake?
I have C6AE heads and I am looking to purchase an intake with the #s:
C6AE-G on it. Is this a large port? What is the clue? How can I tell which is the large port and the small port intakes?
You've been so awesome on answering my questions! You really know your stuff!
Anyway, I just want to find out, what is considered a large port intake?
I have C6AE heads and I am looking to purchase an intake with the #s:
C6AE-G on it. Is this a large port? What is the clue? How can I tell which is the large port and the small port intakes?
Post Fiend
Joined: Feb 2000
Posts: 5,130
Likes: 8
From: Brea CA
Hey no problem!
Well, I'm home now and all my pics are at work but the C6AE-G sounds like an "S" intake with the small ports. Any intake with a C5 or C4 or C3 etc. will be a large port intake but I wouldn't worry about it, small intake with big head is no problem. It actually creates a low pressure zone at the transistion to keep the manifold from puddling out.
I thought you had to run a EGR, have things changed?
Well, I'm home now and all my pics are at work but the C6AE-G sounds like an "S" intake with the small ports. Any intake with a C5 or C4 or C3 etc. will be a large port intake but I wouldn't worry about it, small intake with big head is no problem. It actually creates a low pressure zone at the transistion to keep the manifold from puddling out.
I thought you had to run a EGR, have things changed?
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Freshman User
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From: Phoenix Area
I still have to run EGR, but I can use any of these stock manifolds with a stock EGR plate, right? Or am I wrong...?
Also, would you say that a small intake with large heads will be a good thing, or would large intake be better?
Also, would you say that a small intake with large heads will be a good thing, or would large intake be better?
Post Fiend
Joined: Feb 2000
Posts: 5,130
Likes: 8
From: Brea CA
Umm, no EGR won't work with those intakes. The stock EGR plate gets it's feed from the little hole in the carb. flange of the later manifolds. Exhaust gas comes up from that hole and goes into the bottom of the EGR plate. Sorry, maybe I didn't explain it right before.
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Freshman User
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From: Phoenix Area
Now I get it. You're right - I checked the picture you gave me. Whole new set of problems. So what year manifold do I need? Obviously one with an EGR hole. Is there a specifice casting number I need to look for?
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Freshman User
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From: Phoenix Area
EUREKA!!! I think I finally got it! So, what I need is ANY manifold (because I can use whatever size with my heads) that has the EGR port in the manifold.
Am I right, or is stupid the only word that describes it...
By the way, this whole d*mn EGR thing sucks!!!
Am I right, or is stupid the only word that describes it...
By the way, this whole d*mn EGR thing sucks!!!
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Post Fiend
Joined: Feb 2000
Posts: 5,130
Likes: 8
From: Brea CA
Yes, any manifold will work with your heads but you'll find that all the manifolds with the EGR hole will be the smaller port.
Good luck on your quest, I admire your enthusiasm! Someday you'll be a cranky old fart like us.
Good luck on your quest, I admire your enthusiasm! Someday you'll be a cranky old fart like us.
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Thread Starter
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Freshman User
Joined: Feb 2004
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From: Phoenix Area
Well, thanks BB, I like to think of myself as a cranky YOUNG fart! 
Anyway - you guys rock! Here's a motto for 'ya!
CHEVROLET: Cheap Heap, Every Valve Rattles, Oil Leaks Every Time
Anyway - you guys rock! Here's a motto for 'ya!
CHEVROLET: Cheap Heap, Every Valve Rattles, Oil Leaks Every Time
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