yeah, thats not a typo

I purchased this lid for next to nothing and did some experimenting on it. Its a Granatelli and the original purchaser grinded the **** out of it and still couldnt make it fit his base. Frankly, it looked like a blindfolded drunken monkey made it as the rear (4) tabs pointed in all different directions, the 104mm outlet interfered with the base by over a half-inch, the two short sides interfered with the filter tray by 1/8" on each side so there was a 1/4" gap between the lid and filter, AND if you could get the tabs in the slots on the back side, the back corners of the lid interfered with the humps on the back of the base that they forced the entire lid so far forward, the tabs came out of the slots

I'm kicking myself for not getting a 'before' pic but what I did was put it on a flat cookie sheet in a 400deg oven for about 8 minutes. That was just enough time to allow the lid to 'relax'. The front corners were now even with the edges, the tabs all pointed straight back, and the bottom of the outlet was pushed up enough to clear the base. If you make a complete circle with the outlet, you can see how it would come into contact with the base



however, the front corners still interfered with the filter tray - you can see how they still curl up at the corners



so I took my trusty orbital sander and gently smoothed the inner edges of the lid lips in order for them to slide over the filter tray. There's still over 1/8" of material left. I then went over the rough sanded areas with a heat gun to smooth them out and make it look like it was cast that way

you can see how nice and smooth the edges are now and how tight the lid seals to the base now - this pic is with the filter and tray in place



I then went a little further (perhaps too far?) and smoothed out the hump on the top of the lid that normally hits the hood of LS1 cars. On the back side, I opened the mouth to imitate the LT1 throttle body. The neck has also been opened significantly as well as the bend on the bottom side. All this was done with a heat gun an inch or two at a time. Its far from perfect and I plan to smooth it out more when I get time



I have a 22deg 4in PVC bend I plan to do similar work to. I'm thinking some time in the oven plus some gentle persuasion should get me a nice, flat bend that will also mimic the LT1 TB opening. I found a 3in fernco fits but just a bit too tight IMHO... so I'll be using two 3.5in silicone couplers between the lid/bend and bend/TB

 

Looks good when its on the car. Funny thing is alot of people thought I had a LS1 engine at cruise nights just because of the intake setup. lol A 3 or 4 inch cowl hood should allow you to run it without no cutting to the core support or anything crazy like that. I ran a glasstech 4 inch cowl and just notched the underside bracing on the hood and fit like a glove.

Ignore the overflow tank and temporary bleeder valve lol

 

yeah, I failed to mention my goal is to avoid hacking up the base - I plan to drill and weld nuts to the core support and use washers/bolts so it looks like it was installed from the factory

should also mention mine is a '93 so I wont need a MAF

 

Mike, did you have to cut the front metal crossbrace(forget what its called. the thing the lid sits on) so that the Lid sat lower or did you not have to do that?

 

 

No Joe he didn't, Just like I did with the hood is all he had to do but apparently with the FTP lid I had to lower and trim the base.

 

Correct...just had to notch underneath the hood. I may drill and tap a hole for two inner bolts but otherwise if you have a cowl hood, its pretty much bolt on and go.

 

Please post some pics of the underneath of the hood.

 

Swapped to a LS1 front clip so no longer have the hood, I believe there is a pic somewhere in my build thread, give me a couple minutes, Ill see if I can find it...

 

Here is where I cut (rough cut I made, later cleaned it up with a dremel) but just cut to open up the cowl scoop under the hood. Just eyeball where you need to cut and then slowly close the hood and see if you clear, if not, just keep trimming until you do.

 

very clean, one of the best lid swaps iv seen.

 

So how's this coming along? I think it's a pretty good idea to "ovalize" that outlet, looks good.

-Dustin-

 

How much does a guy have to cut on a stock bird hood?

 

So the only thing that needs to be cut is the hood?????

 

I'm going to use it with a WS6 hood I have yet to purchase... so I can only mock it up when I have an hour or two to remove the stock stuff first. My goal is to angle the outlet of the lid directly at the TB so a bend isnt necessary. Havent decided if I'm going to use an oval PVC piece with two silicone connectors or just one long connector

 

its hard to say... I know it was 104mm (4in) to begin with and a 3in fernco could be forced on with lube... afterwards, the same fernco was just as difficult to get on if not a little more

I didnt stretch it too much...maybe just a little. It was real soft and flexible when hot and I got it into the basic shape I wanted and then sprayed with cold aerosol glass cleaner to make it harden again... used a heat gun to finish the rough spots

 

el Cheapo Granetelli ebay lid

A member purchased it and it didnt even come close to fitting his car so I bought it before he chucked it in the trash.