C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Which one flows more?

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Old Mar 31, 2002 | 02:39 PM
  #1  
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Default Which one flows more?

Does it matter?

The lid on the left is from my 93. The opening is 28 sq in.
The side inlets are approximately 48 sq in(probably less, I had to guess)

The lid on the right is from my 95.
There are 24 louvers totalling 48 sq in.
The inlet is about 36.23 sq in.

What do you think?




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Old Mar 31, 2002 | 02:42 PM
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Default Re: Which one flows more? (Mr Mojo)

Left. (just a guess)
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Old Mar 31, 2002 | 02:44 PM
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Default Re: Which one flows more? (Mr Mojo)

I would guess the 95 but who knows...I cut my lid as well.
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Old Mar 31, 2002 | 02:45 PM
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Default Re: Which one flows more? (RadPolo96)

Well, I put the 95 lid on the 93, we'll see if any difference pops up at the track. I'm thinking no, but you never know.
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Old Mar 31, 2002 | 03:48 PM
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Default Re: Which one flows more? (Mr Mojo)

Why waste the time switching, they both restrict flow beyond belief. Just cut it open and call it a day.

Or if you really want to keep the original, buy an extra and butcher it up.
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Old Mar 31, 2002 | 03:58 PM
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Default Re: Which one flows more? (LPDesRoche)

Lee, I have two spare lids right now. So far an open lid hasn't made a difference over a stock one which is why I don't think there is much difference here.
I'll most likely be putting the SLP on just for looks.
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Old Mar 31, 2002 | 04:34 PM
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Default Re: Which one flows more? (Mr Mojo)

The '93 pulls the air from the sides not the top. So I'm guessing it takes in colder air. Which one flows more, I don't know:confused:.
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Old Mar 31, 2002 | 05:06 PM
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Default Re: Which one flows more? (Mr Mojo)

I actually got a true .5-1 mph increase at the track with the open lid. Did a few back to back swaps just to see.

Even played with it on the dyno just to see, it was a 7hp increase I think. Can't remember, but all the cars are different. So what works for one generally doesn't do the same for another.
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Old Mar 31, 2002 | 07:40 PM
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Default Re: Which one flows more? (LPDesRoche)

Open lid sounds better, too. Sounds a little more evil under WOT :yesnod:
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Old Mar 31, 2002 | 07:46 PM
  #10  
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From: Exit 89 GSP,Lakewood,NJ The Land Of Mojo
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Default Re: Which one flows more? (95_C4_convertible)

Tell you what, that '93 sounds pretty mean with everything stock still in it.
At WOT it roars.
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Old Mar 31, 2002 | 07:48 PM
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Default Re: Which one flows more? (Mr Mojo)

Frank, maybe you should repeat the intake swap test after you've freed up the exhuast system a little. The engine may now have all the air it can expel.
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Old Mar 31, 2002 | 07:56 PM
  #12  
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Default Re: Which one flows more? (65Z01)

Actually Jim, at the Show and Go this year or Test and Tune, I'm going to bring the '95 out both with the open lid and stock and K&N and Stock.
I can compare that to the eliminators now that the Corsas are on.
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Old Apr 1, 2002 | 05:01 AM
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Default Re: Which one flows more? (Mr Mojo)

Im gonna guess and say the 95 is less restrictive. For 2 reasons. 1. GM redesigned it for some reason. 2. Its not making the air do another 90 degree turn.
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Old Apr 1, 2002 | 02:19 PM
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Default Re: Which one flows more? (Red 86 4+3)

Looks like they went back to the late L98 lids with the later LT1's. I would guess that there's negligible real world performance difference between them, most likely the changes were made for noise reasons (just a guess).
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