Intake manifold clearance
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Joined: Apr 2006
Posts: 52
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From: Fairfield Connecticut
Intake manifold clearance
Im currently rebuilding a 73 corvette and over the summer i built a new 350 engine. It seemed to be going well until i started to take the old engine out, when it dawned on me that with the manifold that i had put on the new engine the the whole engine height would be about 2 - 4 inches higher than the original engine causing clearance problems with the stock small block hood. I was just wondering if anyone had any ideas about possible solutions like switching to an l88 hood or possibly getting new motor mounts that lower the engine, or maybe even getting a lower sittiing air cleaner. Does anyone have any ideas about what i can do to solve my predicament.
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Joined: Jun 2006
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From: cudjoe key fl
intake
what kind of intake are you using? I just installed a zz383 with edelbrock air gap rpm manifold and 1 1/2 drop air cleaner , 3 inch filter 770 cfm holley street avenger carb and everything fits under the hood of my 78 l-48
Intermediate
Joined: Sep 2006
Posts: 35
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From: Lloydminster Saskatchewan Canada
Hey how did you do it?
Looks to me like every one has hood clearance issues with taller than stock manifolds. I myself was prepared to limit my intake selection to performer only. I don't have the stock airfilter unit. Not a drop design either just a 2 inch Mr Gasket type filter on present GM stock intake.
The drop filter you mention, does it work with all Holley 4 bbl carbs
Like the 770 CFM
Looks to me like every one has hood clearance issues with taller than stock manifolds. I myself was prepared to limit my intake selection to performer only. I don't have the stock airfilter unit. Not a drop design either just a 2 inch Mr Gasket type filter on present GM stock intake.
The drop filter you mention, does it work with all Holley 4 bbl carbs
Like the 770 CFM
Burning Brakes
Joined: Feb 2006
Posts: 1,173
Likes: 5
From: Paducah Ky
I am not sure where the break is but I think the earlier C3's do not have the hood clearance of the later models.
Also, an L-88 hood would give you plenty of clearance. I've never heard of anyone fixxing this problem by dropping the engine.
Also, an L-88 hood would give you plenty of clearance. I've never heard of anyone fixxing this problem by dropping the engine.
Instructor
Joined: Apr 2006
Posts: 174
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From: Wallaceburg Ontario
Originally Posted by gyopp
I am not sure where the break is but I think the earlier C3's do not have the hood clearance of the later models.
- Chilli
Safety Car
Joined: Nov 2005
Posts: 3,961
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From: Lompoc, CA. Santa Barbara County
Originally Posted by gyopp
I am not sure where the break is but I think the earlier C3's do not have the hood clearance of the later models.
Also, an L-88 hood would give you plenty of clearance. I've never heard of anyone fixxing this problem by dropping the engine.
Also, an L-88 hood would give you plenty of clearance. I've never heard of anyone fixxing this problem by dropping the engine.
Last edited by Bee Jay; Sep 27, 2006 at 09:13 AM.
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Joined: Jun 2006
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From: cudjoe key fl
ckeckervette,
the air cleaner i'm using is a holley 1 1/2 drop base air 14inch diameter air cleaner with 3 inch element. i bought it at advance auto for about $39.00. only have about 3/4 clearance but that is enough. i was worried too but it all worked out. i was about to buy another hood!
air cleaner is sitting on holley 770 cfm street avenger manifold with edelbrock air gap rpm manifold.
the air cleaner i'm using is a holley 1 1/2 drop base air 14inch diameter air cleaner with 3 inch element. i bought it at advance auto for about $39.00. only have about 3/4 clearance but that is enough. i was worried too but it all worked out. i was about to buy another hood!
air cleaner is sitting on holley 770 cfm street avenger manifold with edelbrock air gap rpm manifold.
Last edited by capt.t; Sep 27, 2006 at 09:10 AM.
Safety Car
Joined: Nov 2005
Posts: 3,961
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From: Lompoc, CA. Santa Barbara County
Nope, same hoods. It's a good looking hood too in my opinion. It would be cheaper for me to make my stock hood work, and rig up some type of cold air induction. I don't like the stock twin snorkel with hoses setup.
Drifting
Joined: Nov 2002
Posts: 1,951
Likes: 1
From: Shore NJ
Edelbrock air gap manifold, Demon carb, 1/2" billet spacer used for the clearence needed to use vacuum connection off the manifold here. Use a drop base air cleaner from a 72 and you'll have no problem.....
Instructor
Joined: Apr 2006
Posts: 174
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From: Wallaceburg Ontario
Typically, I think Demons are a little bit taller than Holleys; at least at the surface where the breather sits. If that's the case, you should have no clearance issues. Others here will know better than me.
- Chilli
- Chilli
Intermediate
Joined: Aug 2006
Posts: 31
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From: Lynn Ma.
Originally Posted by Chilli
Typically, I think Demons are a little bit taller than Holleys; at least at the surface where the breather sits. If that's the case, you should have no clearance issues. Others here will know better than me.
- Chilli
- Chilli
Russ