| Aluminum Intake [message #362347] |
Fri, 12 February 2021 17:34  |
Greg C.
Messages: 224
Registered: October 2019
Location: Knoxville, TN
Karma: 0
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Hi all:
I recently obtained an A4 casting number aluminum intake for a late model 307 Olds. I plan to use this intake on my 1977 403. It is an EGR version, and I have been able to remove the two recirculation tubes that go in the primary bores and plan to plug those, as well as the carb heat and EGR valve ports. I have an electric choke.
My question is do I need to use a turkey tray type gasket with this?
I plan to purchase the Paterson gaskets and block off plates if I don't need the turkey tray.
Greg Crawford
KM4ZCR
Knoxville, TN
"Ruby Sue"
1977 Royale
Rear Bath
403 Engine
American Eagle Wheels
Early Version Alex Sirum Quad bags
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| Re: Aluminum Intake [message #362361 is a reply to message #362347] |
Sat, 13 February 2021 06:40  |
94nubble
Messages: 275
Registered: July 2011
Location: Chesapeake VA
Karma: 3
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The casting number should be 22504068 for the correct 307 manifold.
Tom McManus
1977 Royale
Chesapeake VA
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| Re: Aluminum Intake [message #362366 is a reply to message #362347] |
Sat, 13 February 2021 11:02 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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Are the runners on a 307 manifold as big as for a 403? If smaller it might be good for off idle response but not capable of 12,000 GVW road load. I have a computer controlled Qjet Olds 307 in my 84 Riviera and I find it adequate (just) and make sure the Qjet opens properly, but couldn’t imagine it in a higher GVW vehicle.
John Lebetski
Woodstock, IL
77 Eleganza II
[Updated on: Sat, 13 February 2021 11:03] Report message to a moderator |
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| Re: Aluminum Intake [message #362367 is a reply to message #362366] |
Sat, 13 February 2021 13:16 |
94nubble
Messages: 275
Registered: July 2011
Location: Chesapeake VA
Karma: 3
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The 22504068 manifold has large ports that match the 403 heads and other than being aluminum, it's almost identical to the cast iron. The only thing is it doesn't have the mount for the fast idle assembly.
Tom McManus
1977 Royale
Chesapeake VA
[Updated on: Sat, 13 February 2021 13:16] Report message to a moderator |
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| Re: Aluminum Intake [message #362368 is a reply to message #362347] |
Sat, 13 February 2021 15:20 |
Greg C.
Messages: 224
Registered: October 2019
Location: Knoxville, TN
Karma: 0
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Yes, I've heard it is the identical casting except for ridges on the floor. An Olds performance article said that this was for better fuel atomization, but the author said it was crap over 4500 RPM. As Chuck
Boyd said in one of these conversations the ridges might actually help fuel atomization at lower RPMs, and I don't plan on running 4500 on my engine.
I am glad to know I don't need to run the turkey tray.
Greg Crawford
KM4ZCR
Knoxville, TN
"Ruby Sue"
1977 Royale
Rear Bath
403 Engine
American Eagle Wheels
Early Version Alex Sirum Quad bags
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| Re: Aluminum Intake [message #362369 is a reply to message #362347] |
Sat, 13 February 2021 15:21 |
Greg C.
Messages: 224
Registered: October 2019
Location: Knoxville, TN
Karma: 0
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Senior Member |
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Oh, yes, that is the casting number mine has.
Greg Crawford
KM4ZCR
Knoxville, TN
"Ruby Sue"
1977 Royale
Rear Bath
403 Engine
American Eagle Wheels
Early Version Alex Sirum Quad bags
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| Re: Aluminum Intake [message #362371 is a reply to message #362368] |
Sat, 13 February 2021 18:06 |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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Greg C. wrote on Sat, 13 February 2021 16:20Yes, I've heard it is the identical casting except for ridges on the floor. An Olds performance article said that this was for better fuel atomization, but the author said it was crap over 4500 RPM. As Chuck Boyd said in one of these conversations the ridges might actually help fuel atomization at lower RPMs, and I don't plan on running 4500 on my engine.
I am glad to know I don't need to run the turkey tray.
Greg,
Without the hot crossover, those ridges will do little good. They were really there to try to diminish the wet fuel washing the bores. As you are going to close off the manifold heater pass (crossover), yes, the turkey tray will not be required. The real function of that is to keep oil from cam and lifters from getting on the hot part and coking up so the chunks could fall back into the valve gear.
Blocking off the heater pass is always a good idea if you don't plan to run her hard in Zero degree weather when you should have just driven gently for a mile.
The OEs have to make everything work for everybody all the time so some stupid things have to be included.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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