HOW TO DO AN ADVANCED SEARCH.

Mon Jul 08, 2013 3:56 pm by Admin


For the benefit of 944Hybrids users there are two search functions available for you to use.
The purpose of this sticky is to explain the "Advanced Search" function because it is much more powerful and is the best choice when researching information.

When you log on to the site a list of options is shown in a line at the top of the page. One option is labelled "Search", use this option (NOT the search box lower down on the right).

After you click on the upper search option, a drop down box appears. At the bottom of this box is a radio button marked "Advanced …

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Any tips or tricks to fitting a 4" intake setup?

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Any tips or tricks to fitting a 4" intake setup?

Post  robschwieb on Fri Nov 09, 2018 7:28 am

I'm getting close to wrapping up this build but there's one detail I haven't ironed out, the intake. I've looked all the other builds and setups on here as well as an exhaustive search.

From what I can tell, it boils down to "all of these cars have slightly different tolerances so the LS never sits exactly the same from one swap to another". I seem to have drawn the short straw here.

I'd prefer to keep the intake routed as I have it in the pic below. Looks really clean, it's easy to get to, and IATs should be lower over in that corner. From test fitting the hood last night, I appear to be hitting on the raised lip of the hood right near the front edge. Has anyone cut portions of this out to gain clearance?

Below is a pic of my current setup. I've also attached two pics I found over on Rennlist that I used for inspiration. I can't tell, and the thread doesn't specify, but does that look like 4" or 3.5"?

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Last edited by robschwieb on Tue Nov 20, 2018 9:44 am; edited 1 time in total (Reason for editing : fix image link)
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Re: Any tips or tricks to fitting a 4" intake setup?

Post  FrostedFlakeJake on Tue Nov 20, 2018 8:17 am

It appears that the picture of your setup did not load correctly; I can see the other ones.

Unfortunately I'm in the same rut as you. Chiming in hoping someone comes to share their wisdom.
I've mocked up probably 4-5 different aluminum intakes in attempt to put the filter over behind the driver side headlight but they all hit the hood. I cut away all of the hood support structure as well and still don't have enough room.

Just curious, what air filter are you planning on using? Did you have to cut away the structure on the back of the flip-up headlight assembly?

Hoping someone can help you (and me) before I give up and run the air filter through the front nose like a 'vette.


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Re: Any tips or tricks to fitting a 4" intake setup?

Post  rawr on Tue Nov 20, 2018 8:19 am

Mine sits super far forward. I had to remove the popups and weld in a tab for them to be always up and cut the hood latch and use hood pins. I had to cut the bracing off the hood in the front too. This is in an 85 early.

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Re: Any tips or tricks to fitting a 4" intake setup?

Post  rawr on Tue Nov 20, 2018 8:23 am

Jake I had to go with silicone all the way to let it smoosh a little bit when the hood closes

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Last edited by rawr on Tue Nov 20, 2018 10:00 am; edited 1 time in total

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Re: Any tips or tricks to fitting a 4" intake setup?

Post  crashed9xs on Tue Nov 20, 2018 9:31 am

I used silicone around the headlight linkage. I put a bracket below the intake so the linkage didn't rub the hose. My maf sits behind the headlight (above the headlight bracket). I enlarged the stock opening for the original air intake.

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Re: Any tips or tricks to fitting a 4" intake setup?

Post  robschwieb on Tue Nov 20, 2018 9:51 am

My original image link should work now. Thanks for the input and feedback so far guys.

Last night I did some more tinkering and I think I have it sorted. I'll grab a pic tonight and post it. I did the exact same thing as my first pic in the first post but everything is 3.5" and silicone instead of rubber. I shaved part of my headlight bar linkage down a bit, and chopped off the driver side headlight stop bracket. Doesn't seem to affect alignment or stability much but we'll see once it's out on the road.

Right now, the hood latches but I can feel some tension when releasing it. I think once I remove the nasty hood foam, and dent the underside of my 3.5" intake pipe near the driver side headlight bar linkage I'll be done.
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LS3 4" Intake with original hood latch

Post  Porsche951toLS3 on Tue Nov 20, 2018 11:54 am

I did a write up on how I did mine with 4".  It revs to 6600 rpm all day.  Here is the copy/paste.

** 6.2 Liter LS3 480 HP Crate Motor Drive by Wire **

Porsche951toLS3 wrote:I found a solution I would like to share with pictures to show my way of getting around the hood latch while keeping my 4" intake on an LS3 installed in a 1986 Porsche 951.  I thought it would be impossible, but my wife said "NO DRILLING MY HOOD".
Here is what I did.  In the pictures you will see a silver colored chicken wire frame wrapped with  aluminum foil tape to create my mold.  I then waxed the aluminum so it would not stick as I wrapped it with ScotchCast Plus Casting Tape.  It is the same stuff used to make a cast on a broken arm.  Takes about 3-5 mins to dry hard.  I then cut a line on the outside bend to release it from the mold and super glued the line.  While waiting for the glue to dry, I put zip ties around it to hold the shape.  The cast was then covered inside and out with fiberglass resin to seal the pin holes.

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Notes:
1.  I formed the chicken wire loosely to account for the casting tape when it was done.  
2.  The center was made wider to allow for the air volume since I was compressing the circle.
3.  Both ends are still 4" allowing the full air volume to pass.
4.  I will be installing a 3/8" nipple in one of the silicone tubes for the PCV tube from engine.
5.  In one picture you can see where I made a cut on the bottom to press in slightly where it will rest on the headlight bar.  If you account for this while making the mold, you wont have to cut it like I did.  After it was all done I lightly applied a silicone grease on the headlight bar to keep it slick when using the headlights.  I probably did not even need the grease, but I did it anyway.  
6.  Yes, I had to cut the area open next to the latch to allow for this to pass through.
7.  EXTRA NOTE: I turned my throttle body upside down which gave me more hood clearance and set
up my ability to make this modification which all fits under the hood and NO CUTTING OF THE HOOD.
8.  You can see in the picture that I took off the intake cover that is over the top of the intake for clearance.  It still looks the same, but the cover had noise foam in it.  Now it does not touch my hood.
8.  The top silicone tube is a 45 degree angle and I cut out a small corner of the hood latch for
clearance parallel to the silicone tube.  The pictures will help with this.  Hope you enjoy the pictures and
maybe an idea you can use.  All of this allowed me to fit the LS3 with NO CUTTING OF THE HOOD.


Last edited by Porsche951toLS3 on Wed Nov 21, 2018 8:43 pm; edited 1 time in total
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LS3 4" Intake with original hood latch

Post  Porsche951toLS3 on Tue Nov 20, 2018 11:57 am

Also, later I learned how to fix a jerking problem when the air filter was put in the nose of the car.

I did the write up under:

**FIXED** 944 with LS3 bucking or jerking while cruising or low speed problem

I hope all this helps you since I went through the headaches.

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Re: Any tips or tricks to fitting a 4" intake setup?

Post  murrayg on Tue Nov 20, 2018 6:03 pm

Here's what worked for me.  Early 85 / LS6.  I used silicone as well, and allowed the hood to "squish" the 90 a bit.  It's not as bad as it looks.  I also reshaped the headlight support bracket for filter clearance.   I put in a heat shield to keep the headers isolated, and got immediate good results.  AIT went from over 50c to ambient.  The car definitely ran better.  [You must be registered and logged in to see this image.]

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Re: Any tips or tricks to fitting a 4" intake setup?

Post  robschwieb on Wed Nov 21, 2018 8:16 am

Thanks for all the pics guys. This thread is turning into a great resource for ideas.

Ran out of time last night finishing up wiring and didn't get a chance to "massage" the intake pipe near the head light bar linkage but this is what I have right now. Fairly confident I can make it all fit.

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Re: Any tips or tricks to fitting a 4" intake setup?

Post  adeptpro944 on Thu Nov 22, 2018 10:06 pm

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Re: Any tips or tricks to fitting a 4" intake setup?

Post  robschwieb on Wed Nov 28, 2018 10:03 am

Much better with everything being 3.5 inch. Hood closes and after massaging the tube near the headlight bar linkage, no rubbing.

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Re: Any tips or tricks to fitting a 4" intake setup?

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