By request: INTENSE FWI on a Series 1 L67: - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 05-30-2007, 12:11 AM   #1
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Default By request: INTENSE FWI on a Series 1 L67:

Note, this is for 94/95 L67'*. The coupler for the FWI will not fit a 91-93 L67 TB, and the 3.5" tubing is far too much for those years, and will not produce laminar flow and accurate MAF readings.

For 94/95 L67'* and 'top-swapped' 91-93'*, here'* your guide in a nutshell:

I ordered the 97 SSEi kit, and asked for extra tubing. I don't recall if it was half or a full foot extra, but I don't think I needed any of it. Total length of mine is 26" of tubing, but it could be a little shorter or longer and work fine.

Install the TB adapter, but push the aluminum insert/sleeve past the IAT hole to block it:
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Can you see the bright aluminum in the hole?

Route your tubing into the old hole in the fender for the evap canister. You'll need to replace your double washer reservior (if you have it like I did) with a SINGLE purpose reservior from an SE/SLE. I simply swapped between my two cars. Be creative in how you hold the filter in there.
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Relocate the evap purge canister in an UPRIGHT position. I haven't done final mounting on mine yet.

In the OTHER bright aluminum sleeve (for adapting the tubing to the filter) drill a hole and install a bushing for the IAT:

Note that I have fabric (black) tape around this sleeve to either side of the bushing for cosmetic reasons.

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This puts the IAT directly above the filter.

Here'* a view of the filter location with the camera pointing up at a 45 degree angle, looking from front to rear at the front driver'* side tire:
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Because of the lack of shielding, I strongly suggest any 92-99 H body SHEILD this from road splashes and debris. I'm not, because I don't drive this car in the winter.

Finished look from the top (without final relocation/mounting of the Evap canister):
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Old 05-30-2007, 12:36 AM   #2
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awsome writeup

but question and I hope its not off topic but what are l27 owners options when it comes to a fwi? top end swap?
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Old 05-30-2007, 12:38 AM   #3
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No, there is no top swap for an L27 in the sense we're talking about here. The L67'* have two different SC'* and TB'* in the Series 1'*. Jwikoff and I are running 94/95 top ends on our 92/93. L27'* don't have anything other than the smaller of those two sizes.

I think a 3.5" FWI would kill an L27. Stock airbox with drop-in K&N would be better.
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Old 05-30-2007, 12:48 AM   #4
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how about a cai? mild enough not to kill it? and would a fwi be a possibility with supporting mods or is a l27 forever restircted to not having a fwi?
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Old 05-30-2007, 12:52 AM   #5
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Sounds like a different topic to me. I've had 3 requests in the last week specifically regarding the FWI on a Gen 3 Series 1 L67.

CAI topics abound.....but you're welcome to start one.
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Old 05-30-2007, 12:57 AM   #6
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what about using a 3.5 to 3.? coupler on the TB side and then using the intense provided silicone coupler for the IAT? would that not work?
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Old 05-30-2007, 01:18 AM   #7
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No, it won't work....and what are we talking about here? I didn't need a 3.5 to 3" reducer. I have the same size TB as a S2 L67. Any 94/95 L67 does.

If you have a SMALLER TB, this topic isn't about that. This is a very SPECIFIC topic by request of 3 members who are interested in the fitment of an INTENSE FWI on a 94/95 L67.

On anything with a SMALLER TB (91-93 L67 or L27) a 3.5" tube necking down that far is a ridiculous amount of mismatch and turbulence, probably hurting performance. Those TB'* only have a 2.25" throttle plate.

Can we get back on topic please?
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