Aluminum Intake

G

Greg C.

Active member
Oct 11, 2019
256
23
28
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
 
You do NOT need a "turkey Tray". The Paterson gasket with the block-off plates is your best choice.
--
Carl Stouffer
'75 ex Palm Beach
Tucson, AZ.
Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles,
Solar battery charging. GMCSJ and GMCMI member
 
Are the runners on a 307 manifold as big as for a 403? If so 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
 
The 22504068 manifold has large ports that match the 403 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
 
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
 
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
 
> 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,

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
 
You must log in or register to reply here.
Applied GMC
Get your shine on at www.cruzingear.co

Share this page

Share this page
Top Bottom
Back