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Hood clearance issues
I am looking at creating a little more clearance between the top of the aircleaner and the hood scoop. My first thought is to mill about a 1/4” off the top of the intake manifold. I currently have a performer rpm intake on a 429. My current air filter is about 17/8” high and I would like to put something a little higher or a top that breathes as well.
Any feed back on this would greatly be appreciated, I know it may compromise the original design of the intake but if a loose a little HP I may gain it back in having the motor breath better. |
Lots of info and ideas on CC try a search. Here's a recent thread.
http://www.clubcobra.com/forums/fe-t...ggestions.html |
Hawkeye is this a D&D [?] cobra like in your sig. or a more well known B&B cobra. I own a B&B and I also have the clearance issue. My way around it was to mill off the bottom of a K&N billet air cleaner. I also cut the bottom off an edelbrock air cleaner. They both worked out good. I have the luxury of a tall hood scoop which came as an option. I would not mill the intake as the divided plenum is small enough. This would also negatively effect the turn radius causing a problem with air and fuel mixture.
I have thought of buying another hood and putting a low Harwood scoop on it :D but that's just me. I have an air cleaner that I modified to breath better. Look in my profile under Lou's pictures. Lou |
Yes this is a D&D cobra as in my Gallery. I currently have about 3/16"th clearance but would like to put on a k&n extreme top on the air filter. With the shape of the extreme element I would need a little extra clearence to get it in. Unless some one can recommend a drop filter base for a 9" round filter to gane clearence.
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Doubt you will find a drop base for a 9" filter.Our 460 car with same manifold needed a 3"x14" with Extreme top according to K&N so I did get another hood modify and graft in a Harwood scoop.It could not have worked out better the motor has plenty of clean air and the scoop looks like it was meant to be there.
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I went through this exercise with a different kind of car several years ago. Here is the list of options I remember.
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Here's what I did....bought a K&N X-Stream air-cleaner assembly, found out that with the nicely radiused K&N base there was not enough clearance. I had been using a Mr. Gasket air cleaner that was shorter, so I used that and here's what I came up with:
http://i227.photobucket.com/albums/d...s/101_3298.jpg It is possible to get a shorter K&N 9" cleaner element...which would give additional clearance. One of our members (sure wish I could remember the name) used some flat aluminum stock to mill out a plate for his Holley, but I am using an Edelbrock carb and the choke mechanism would have interfered...if you have a Holley perhaps you can find his thread. IIRC he had a few milled up and was selling them at cost, perhaps he has a few left for sale. Good luck....much as I hate to do it, I think I am going to have to lower the engine in my Cobra replica to get the intake system I want to fit..... Cheers! Dugly :cool: |
I wanted to use a Turkey Pan and replace the old style Stelling & Hellings with a K&N XSTREAM filter. Unfortunately the 2.75 high filter created an overalll height of 4.5. I only needed 3/8 less to clear the hood. In a search on the K&N web site I found a 9 inch dia filter that was 2 inches high. That is PN E-3527. I bounce between removing the Turkey Pan and 9 incher and reinstalling the elliptical filter assembly that came with my Roush 427SR. The CFM is less with the 9 incher but I have not noticed any performance drop. I don't know if this is an acceptable solution for you but it is the maximum CFM when using a Turkey Pan and clearing the hood.
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Dugly,
K&N does custom filters. I had some made for my clearance issue on my old SPF a few years ago. Took a couple weeks :MECOOL: |
Big cfm consumption is only needed when really getting into it.With these cars that is very easy to do,in my case anyway and the very reason I chose the path I did.Always better to have it and not need it than to need it and not have it.
Will say going from the Stellings to the K&N was in incredible increase in seat of the pants feel. |
When replacing my oil soaked, dry rotted Stelling & Helling foam element with a H&N, the only K&N I could find that was close in size, was one about 1/4" too tall. I trimmed the rubber bead seal on both sides, basically eliminating the bead, and it allowed enough additional clearance to fit. If you need it, I could find the K&N part number.
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Thanks for all your input.
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Here is a thread that covers some of the K&N options.
"KNN E-2570 is 8.1 inches X 2 inch. The KNN E-1015 is 8.5 inches X 2.5 inch." http://www.clubcobra.com/forums/era-...stellings.html Here is another thread on the subject: http://www.clubcobra.com/forums/orig...r-cleaner.html I use the 2570, the 1015 was too tall to clear for me. One nice benefit to the 2570 is you can slide the wire mesh from the S&H over this element and it maintains most of the original look (if you care about that). :cool: |
Well I may have found the combination. K&N E-2585 element which is 9" dia. and 1.813" high, with xtreme 66-0901. A lot will be based on what I use for a base plate. I only have a max. 2 3/4" clearance from the top of carb to the undeside of hood. It's going to be close allowing 5/16" for torque. I'll know more once I get hold of the xtreme top and see how much of a peak it has.
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your air cleaner lid is probably only a 1/2 " to an 1" or so above your carb.
i went with an edelbrock foam triangle shaped filter. low cost and seems to allow more air flow |
This is the lowest base plate you can get.
http://img850.imageshack.us/img850/231/img0362ee.jpg Under a Cobra hood scoop with an Xtreme lid and flush mounting hardware it doesn't get much better for the 9". http://img51.imageshack.us/img51/1641/img0364id.jpg |
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