Advice on Intake Manifold
Thread Starter
Melting Slicks
Joined: Dec 2000
Posts: 3,363
Likes: 303
From: Lansdale 19446 PA
2024 C3 of the Year Finalist- Unmodified
St. Jude Donor '10-'11, '15, '19
Advice on Intake Manifold
I have a 69 350/350 with the stock cast iron boat anchor intake manifold. I'd much prefer a nice shiny aluminum intake but something made by GM in that era - don't want an aftermarket intake. Well, not for now, anyway.
Anyone know of a stock GM aluminum intake available in the late 60's or early 70's that will work?
Thanks in advance!
John
Anyone know of a stock GM aluminum intake available in the late 60's or early 70's that will work?
Thanks in advance!
John
Melting Slicks
Joined: Mar 2006
Posts: 3,456
Likes: 102
From: Piedmont Va
St. Jude Donor '11-'12-'13,'19-'20
GM had dual plane aluminum intakes they put on LT1 and 302's and such motors that came with Holleys in 69-70. I'm sure if you search around in hemmings or on line you could locate one. GMPP also has a current version they sell but I think they all have EGR port.
Thread Starter
Melting Slicks
Joined: Dec 2000
Posts: 3,363
Likes: 303
From: Lansdale 19446 PA
2024 C3 of the Year Finalist- Unmodified
St. Jude Donor '10-'11, '15, '19
Yeah - saw the LT1 intake & thought they looked tall. All others I have seen har the EGR.
I am trying to keep the stock Rochester look if possible. Maybe Camaro's or Chevy's had something.
I am trying to keep the stock Rochester look if possible. Maybe Camaro's or Chevy's had something.
Le Mans Master
Joined: Apr 2005
Posts: 6,359
Likes: 428
From: Seattle Area WA
You are going to be limited by your choices with a Q-jet, its not GM but a Weiand 8004 doesn't look bad.
http://blog.scottsvettetalk.com/2008...e-rebuild.aspx
http://blog.scottsvettetalk.com/2008...e-rebuild.aspx
Thread Starter
Melting Slicks
Joined: Dec 2000
Posts: 3,363
Likes: 303
From: Lansdale 19446 PA
2024 C3 of the Year Finalist- Unmodified
St. Jude Donor '10-'11, '15, '19
You are going to be limited by your choices with a Q-jet, its not GM but a Weiand 8004 doesn't look bad.
http://blog.scottsvettetalk.com/2008...e-rebuild.aspx
http://blog.scottsvettetalk.com/2008...e-rebuild.aspx
Thanks for the link. Hadn't thought about the posibility of the fuel line. I may not get what I want but I sure will be well informed!!!!!
Melting Slicks
Joined: Mar 2007
Posts: 2,100
Likes: 12
From: Frederick Maryland
If you're happy with how your current intake is performing why not get it plated or powder coated? Given equal design, the air doesn't care if the intake is made of cast iron or aluminum. Aluminum has the advantages of lighter weight and faster heat dissipation, but no inherent advantage in performance per se.
Racer
Joined: Jan 2007
Posts: 350
Likes: 0
From: Louisville KY
If you're happy with how your current intake is performing why not get it plated or powder coated? Given equal design, the air doesn't care if the intake is made of cast iron or aluminum. Aluminum has the advantages of lighter weight and faster heat dissipation, but no inherent advantage in performance per se.
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Thread Starter
Melting Slicks
Joined: Dec 2000
Posts: 3,363
Likes: 303
From: Lansdale 19446 PA
2024 C3 of the Year Finalist- Unmodified
St. Jude Donor '10-'11, '15, '19
Great Idea!
If you're happy with how your current intake is performing why not get it plated or powder coated? Given equal design, the air doesn't care if the intake is made of cast iron or aluminum. Aluminum has the advantages of lighter weight and faster heat dissipation, but no inherent advantage in performance per se.
I hadn't thought of powdercoating the original manifold. Hell, I can do that myself. Now to find a good powder supplier for the chrome/aluminum look.
John
Le Mans Master
Joined: Oct 2000
Posts: 8,897
Likes: 1,357
From: Santa Ana CA
You could probably use the alumium manifold from a midyear HP engine (e.g., 327/350 hp or 365 hp). These were raised slightly but allowed for a stock hood and also provide the necessary distributor nipple clearance.
Nipple clearance is also something to consider. When I put a Performer RPM on my '64, I had to reclock the distributor "1/2 tooth" over so that the vacuum port was accessable.
The real advantage will be the weight savings.
Nipple clearance is also something to consider. When I put a Performer RPM on my '64, I had to reclock the distributor "1/2 tooth" over so that the vacuum port was accessable.
The real advantage will be the weight savings.
Last edited by toddalin; Feb 4, 2008 at 09:28 PM.
Le Mans Master
Joined: Apr 2004
Posts: 7,106
Likes: 38
From: Newark DE
You could probably use the alumium manifold from a midyear HP engine (e.g., 327/350 hp or 365 hp). These were raised slightly but allowed for a stock hood and also provide the necessary distributor nipple clearance.
Nipple clearance is also something to consider. When I put a Performer RPM on my '64, I had to reclock the distributor "1/2 tooth" over so that the vacuum port was accessable.
The real advantage will be the weight savings.
Nipple clearance is also something to consider. When I put a Performer RPM on my '64, I had to reclock the distributor "1/2 tooth" over so that the vacuum port was accessable.
The real advantage will be the weight savings.
John, this wouldn't be my first choice for your motor, again because of the front oil fill tube, but if you wanted to try this route let me know as i may have someone that has one or two of the 461 intakes available.
Thread Starter
Melting Slicks
Joined: Dec 2000
Posts: 3,363
Likes: 303
From: Lansdale 19446 PA
2024 C3 of the Year Finalist- Unmodified
St. Jude Donor '10-'11, '15, '19
Hi Barry! I have seen a couple pre-69 intakes but the oil fill tube is not an option. While the lower weight of the aluminim intake is nice, I don't want this to be a butcher job.
So far I am favoring the powdercoating idea.
Hi L!
So far I am favoring the powdercoating idea.
Hi L!
Race Director
Joined: Jan 2003
Posts: 15,176
Likes: 88
From: State of Confusion
the issue on that choice would be the hole for the oil fill tube in the front of the intake. You would need to either find a way to block off the opening or leave the oil fill tube in place which would look out of place on a 350ci motor which already has the oil fill in the valve cover. not to mention that the aluminum 461 intakes from the SHP C2 motors (350hp and 365hp) are pretty pricey if you find one in good condition. i've seen them go for $500 - $600 on eBay - less if they are in a less pristine condition but still in the $200 - $300 range but than a good low pressure glass beading will bring it back looking good as long as the casting is still in good shape.
John, this wouldn't be my first choice for your motor, again because of the front oil fill tube, but if you wanted to try this route let me know as i may have someone that has one or two of the 461 intakes available.
John, this wouldn't be my first choice for your motor, again because of the front oil fill tube, but if you wanted to try this route let me know as i may have someone that has one or two of the 461 intakes available.
I have an older Chevy intake, that I 'believe' is a 327 CID / 365 HP piece, and I 'believe' the part number is '3844461' (it is on a car I have in-storage over 1000 miles-away and can't confirm the number, so I am going from-memory here..... ), which I bought at a swap meet in '81 for $10.
Le Mans Master
Joined: Apr 2004
Posts: 7,106
Likes: 38
From: Newark DE
..... by '461' intake, I assume this is the last 3 digits of the part-number?
I have an older Chevy intake, that I 'believe' is a 327 CID / 365 HP piece, and I 'believe' the part number is '3844461' (it is on a car I have in-storage over 1000 miles-away and can't confirm the number, so I am going from-memory here..... ), which I bought at a swap meet in '81 for $10.
I have an older Chevy intake, that I 'believe' is a 327 CID / 365 HP piece, and I 'believe' the part number is '3844461' (it is on a car I have in-storage over 1000 miles-away and can't confirm the number, so I am going from-memory here..... ), which I bought at a swap meet in '81 for $10.
These last three digit references are also commonly used on other parts also, such as heads, blocks, etc to identify them from other casting part numbers, such as a "870" block (most 327 block castings - casting number 3782870), "962" ('65 396 block - casting number 3855962), etc.
If you got a 461 intake for $10 you picked up a great deal. Of course back in '81 none of the pricing is what it is today but find another 461 intake and see what it will cost you now!!
Thread Starter
Melting Slicks
Joined: Dec 2000
Posts: 3,363
Likes: 303
From: Lansdale 19446 PA
2024 C3 of the Year Finalist- Unmodified
St. Jude Donor '10-'11, '15, '19
I'm going to trek over to Contemporary Corvette this morning & see what they have.
I Might just pick a spare intake that I can bead blast & powder coat. If I don't lke it, nothing lost. Better make sure it fits in my oven FIRST!
I Might just pick a spare intake that I can bead blast & powder coat. If I don't lke it, nothing lost. Better make sure it fits in my oven FIRST!
Le Mans Master
Joined: Apr 2004
Posts: 7,106
Likes: 38
From: Newark DE
John
cool place that Contemporary Corvette. Andy and I were there last year digging up a part for his '79 Greenwood.
If you find a good intake there do you have your own glass bead cabinet and powder coating equipment?
cool place that Contemporary Corvette. Andy and I were there last year digging up a part for his '79 Greenwood.
If you find a good intake there do you have your own glass bead cabinet and powder coating equipment?
