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1958 - 1981 Pontiac Tech & Restoration Firebird - GTO - Fullsize

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Old 03-18-06, 06:34PM   #1
Gtogtx
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Default Fiberglass hood

Before I go bolting on my Formula hood do I need to change hood springs? I know that after market fiberglass hoods require very light springs on the hinges or none at all. I don't know about the factory hoods though
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Old 03-18-06, 07:45PM   #2
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I didnt, I used the same hinges and springs. The stock formula hood is pretty heavy compared to a aftermarket.
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Old 03-19-06, 05:14AM   #3
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Yeah, what Chuck said.
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Old 03-20-06, 07:41PM   #4
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And one last question on the hood. Is my Performer RPM going to be too tall for the formula hood? I love my RPM but it sure is a pain to fit on an F-Body
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Old 03-20-06, 08:15PM   #5
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I'm running a edlebrock performer with a 1" spacer, holley carb, and 2" air cleaner on my 75 with about an 1/2" of clearance between the air cleaner and hood. So I dont think you'll have a problem with a rpm intake.
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Old 03-20-06, 08:31PM   #6
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Thank Jebus. The RPM is a great intake but can be a pain in the butt
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Old 03-21-06, 04:22AM   #7
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I have a '79 Formula and I'll tell you now that it won't fit. I had to use a drop air cleaner with only a 2" filter just to be able to lower the hood. It still wouldn't latch. A Torker will fit, barely. I then went to a 4" cowl hood ( which I'll sell! ) but finally said the Hell with it and cut a hole in my factory hood so I'd have a reason to go with dual quads/tunnel ram. There's just no room under a formula hood!
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Old 03-21-06, 06:44AM   #8
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I forgot to mention I'm using a drop base also.
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Old 03-21-06, 04:34PM   #9
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I'm using a drop base too. I've been thinking about going back to either my stock hood or one of my Formula hoods with my new build. I have a glass 75 and a steel 76. My question is, will a 2" element feed a 550 horse 463? I have my doubts, so I think I'm going to be stuck with the 4" cowl hood.
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Old 03-21-06, 07:46PM   #10
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I have a 77 formula with a rpm and my hood won't fit. I did cut it and run a 5" filter, but would like to get a cowl hood. ( jayster 2506, you have a cowl hood you would sell? ) how much?
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Old 03-21-06, 10:15PM   #11
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Well in that case is there an intake that performs as well as the RPM but isn't such a hassle to fit under the hood? I want the formula hood and don't want to cut it up. www.up22.com has a smaller 2 1/4 inch cowl hood that is well priced for those of you that are interested
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Old 03-22-06, 07:35AM   #12
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Quote:
Originally Posted by tweety
I'm using a drop base too. I've been thinking about going back to either my stock hood or one of my Formula hoods with my new build. I have a glass 75 and a steel 76. My question is, will a 2" element feed a 550 horse 463? I have my doubts, so I think I'm going to be stuck with the 4" cowl hood.
The 2" will work if you use something like K&N's flow-through air cleaner lid. And yes to 77formula, I have a cowl hood to get rid of. I'll email you the info. Jay.
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Old 03-22-06, 04:45PM   #13
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Thanks Jayster. I have a K&N flowthrough lid, but wasn't sure about using it when it was that close to the hood. K&N said in the instructions that it needs 2" clearance to work right. But it's worth a try. I'll see what happens when I get this build done.
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Old 03-24-06, 05:44AM   #14
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i run a performer under my formula hood. i have a 3" drop base air filter. there's less than 1/2 of clearence
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