gasket matching and heat shield

opelenvy · 11-14-2003

What are you all doing when gasket matching the Weber to the intake? The phenolic gasket is open, the heat shild has two separate holes. Are you cutting out the heat shield to match the gasket and porting the intake to match that?

Jim Branham · 11-14-2003

They are making sure there is no obstruction to the flow of gas and air to the manifold due to to misalignment or improper fit

opelenvy · 11-14-2003

Originally posted by Jim Branham
They are making sure there is no obstruction to the flow of gas and air to the manifold due to to misalignment or improper fit

Thank you Jim, I know what gasket matching is.

My question is are "they" leaving the two separate holes in the heat shield when using the thick spacer/gasket that only has one big hole, or cutting/grinding out the heatshield to match the thick spacer?

Jim Branham · 11-14-2003

Sorry there opelenvy, I am not sure about that. Good question as I will be going through that myself pretty soon. My bet would be that it's all cleared out for the least amount of obstruction.

72Rallye · 11-14-2003

Bob L. recommends using the 2-hole spacers and not the peanut type that you are talking about.
If you have to use the peanut type and the heat shield is placed between the manifold and spacer (which I think is the standard configuration) then you need to match the shield to the spacer. Otherwise the gas flow expands into the spacer and is then obstructed by the 2 holes, causing flow losses.
If the shield is on top of the spacer it really doesn't matter.
Just make sure the shield clears the bores of the carb.
Thomas

opelenvy · 11-14-2003

Yea, I saw in Bob's article that he recommended that spacer. But mine is one hole, and the one GT Source sells is the same. The spacer has to go between the carb and the heat shield. For one it represses the heat from getting to the carb from the intake and heat shield, also the carb has clearance issues directly on top of the heat shield.
Thanks

oldopelguy · 11-14-2003

If you play around on e-vil-bay much, you may want to look a bit at something like the following:

http://cgi.ebay.com/ws/eBayISAPI.dll...category=29402

http://cgi.ebay.com/ws/eBayISAPI.dll...category=36352

You could use that phenolic material to make your own 2 hole spacer. It's super easy to cut or file to shape, and the price is certainly right.

opelenvy · 11-14-2003

Huh, well look at that. Thanks. Mine is 1/8" thick. I know the thicker gives you higher top end with a loss in low end. I like my low end torque.

I rarely go over 90mph anyway.
I'll ask them if they have a thiner one.
Thank ya kindly.

11-14-2003	#1 (permalink)
opelenvy Driver Join Date: Nov 2002 Location: Cedar Park, TX ('Burb of Austin) Posts: 1,179 Real Name: George	Unanswered: gasket matching and heat shield What are you all doing when gasket matching the Weber to the intake? The phenolic gasket is open, the heat shild has two separate holes. Are you cutting out the heat shield to match the gasket and porting the intake to match that? __________________ Born to Drive 73 GT Sport suspension, lowered 2", polyurethane bushings, Koni Reds, adjustable pan hard rod, 205-60/13 Falcons on 13x6 aluminum rims, Ported intake, custom cold air intake, sprint exhaust manifold, 2" free flow exhaust, 4-core radiator, Getrag 5-speed, Momo steering wheel, Saks heavy duty clutch, Euro style driving lights, tinted windows, seats from Acura Integra, 3 point retractable seat belts from a '75 Manta, flush mount aircraft style gas cap

11-14-2003	#2 (permalink)
Jim Branham Opel fan Join Date: Mar 2003 Location: N.J. Posts: 380	They are making sure there is no obstruction to the flow of gas and air to the manifold due to to misalignment or improper fit __________________ Jim B.

11-14-2003	#4 (permalink)
Jim Branham Opel fan Join Date: Mar 2003 Location: N.J. Posts: 380	Sorry there opelenvy, I am not sure about that. Good question as I will be going through that myself pretty soon. My bet would be that it's all cleared out for the least amount of obstruction. __________________ Jim B.

11-14-2003	#6 (permalink)
opelenvy Driver Join Date: Nov 2002 Location: Cedar Park, TX ('Burb of Austin) Posts: 1,179 Real Name: George	Yea, I saw in Bob's article that he recommended that spacer. But mine is one hole, and the one GT Source sells is the same. The spacer has to go between the carb and the heat shield. For one it represses the heat from getting to the carb from the intake and heat shield, also the carb has clearance issues directly on top of the heat shield. Thanks __________________ Born to Drive 73 GT Sport suspension, lowered 2", polyurethane bushings, Koni Reds, adjustable pan hard rod, 205-60/13 Falcons on 13x6 aluminum rims, Ported intake, custom cold air intake, sprint exhaust manifold, 2" free flow exhaust, 4-core radiator, Getrag 5-speed, Momo steering wheel, Saks heavy duty clutch, Euro style driving lights, tinted windows, seats from Acura Integra, 3 point retractable seat belts from a '75 Manta, flush mount aircraft style gas cap

11-14-2003	#7 (permalink)
oldopelguy Have Opel, Will Travel Join Date: Mar 2002 Location: Saint Michael, MN Posts: 1,727 Logbook Entries: 3 Provided Answers: 2	one more idea If you play around on e-vil-bay much, you may want to look a bit at something like the following: http://cgi.ebay.com/ws/eBayISAPI.dll...category=29402 http://cgi.ebay.com/ws/eBayISAPI.dll...category=36352 You could use that phenolic material to make your own 2 hole spacer. It's super easy to cut or file to shape, and the price is certainly right. __________________ 1958 Rekord Sedan, 1958 Olympia Wagon, 1959 Opel Olympia Sedan, 1967 Kadett Coupe, 1967 Admiral Sedan 4L CIH-6, 1968 Kadett fastback 1.1L, 1970 Kadett Wagon Turbo 2.2L, 1971 Kadett Sedan 1.1L, 1975 Manta Wagon 4.3L V-6

11-14-2003	#5 (permalink)
72Rallye Opeler Join Date: Mar 2002 Location: San Diego Posts: 15	Bob L. recommends using the 2-hole spacers and not the peanut type that you are talking about. If you have to use the peanut type and the heat shield is placed between the manifold and spacer (which I think is the standard configuration) then you need to match the shield to the spacer. Otherwise the gas flow expands into the spacer and is then obstructed by the 2 holes, causing flow losses. If the shield is on top of the spacer it really doesn't matter. Just make sure the shield clears the bores of the carb. Thomas

11-14-2003	#8 (permalink)
opelenvy Driver Join Date: Nov 2002 Location: Cedar Park, TX ('Burb of Austin) Posts: 1,179 Real Name: George	Huh, well look at that. Thanks. Mine is 1/8" thick. I know the thicker gives you higher top end with a loss in low end. I like my low end torque. I rarely go over 90mph anyway. I'll ask them if they have a thiner one. Thank ya kindly. __________________ Born to Drive 73 GT Sport suspension, lowered 2", polyurethane bushings, Koni Reds, adjustable pan hard rod, 205-60/13 Falcons on 13x6 aluminum rims, Ported intake, custom cold air intake, sprint exhaust manifold, 2" free flow exhaust, 4-core radiator, Getrag 5-speed, Momo steering wheel, Saks heavy duty clutch, Euro style driving lights, tinted windows, seats from Acura Integra, 3 point retractable seat belts from a '75 Manta, flush mount aircraft style gas cap

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