looking for a lost thread - Chevy Impala SS Forum
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post #1 of 24 (permalink) Old 04-01-2019, 05:40 PM Thread Starter
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looking for a lost thread

I was recently pointed in the direction of the "First" intake manifolds and was curious about them. One older member (Old Coot) apparently installed one modified for the LT1 around 10 years ago and started a thread about it, unfortunately the thread was started in July of '09, talk about bad timing (August of '09 anyone? Bueller? Bueller?) so I'm hoping someone still has a copy of the info floating around somewhere? Probably not, but I figured I would see what anyone remembers. So far I can't find any other references to the intake on here, and that one thread made it to 7 pages in the incredibly short time it was still around. Probably a fair amount of good info, it'd be shame if it's gone for good.



https://www.impalassforum.com/vBulle...t1-intake.html


https://firstfuelinjection.com/

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post #2 of 24 (permalink) Old 04-01-2019, 06:22 PM
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The thread he started on the subject, which I have fading memories of reading with tumescent eyeballs, is either temporarily misplaced or permanently lost.

However:
Quote:
Originally Posted by Old Coot, Feb 2nd '10, 09:45 PM View Post
I have the FIRST long runner TPI intake on my L99 Caprice. The pictures on their website are my car.
Originally, the intake was going on our LT1 car, but when the engine decided to puke a rod bearing, I had to make other plans.
On the L99, the engine starts to pull hard about 1,000 rpm sooner than with the factory intake. My trip to work everyday is over a fairly steep mountain.
With the factory intake, I had to stand in the throttle far enough to force it to downshift into second gear and it would upshift to third at the top.
Now, I can pull the hill in 3rd and the torque converter will lock up before I get to the top. What does that mean? It is taking less throttle input to pull the car over the hill.
Less throttle to do the same work should equal more economy … but I can't keep my foot out of it to see if it really gets any better mileage.
If I ever get around to it, I would like to swap the current B-Body cam for a factory TPI 305 roller and advance it a couple of degrees for more low end power.
Under 6000RpM, more plenum volume is better for atmospheric engines. Heck, even the LS7 inlet manifold has more plenum volume than our LT1.
For pressurized engines, the benefits of additional plenum volume go beyond 6000RpM.

If you ever managed to make a manifold like this seal properly in a boosted application, the extra plenum volume would ALSO make room for chilling provisions …

Shoot Old Coot a PM, invite him to wax prosaic about it here.

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post #3 of 24 (permalink) Old 04-02-2019, 08:01 AM
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Interesting topic. Not able to back into that thread but this popped up:


FIRST intake LT1 build | Grumpys Performance Garage
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\'96SS SOB: SSRI, Herter Tune, Tri-Y II, , 3000 Edge, F/HO bars, METCO extendeds with CV MMC, Bilsteins, currently Vredestein Ultrac Sessanta (315/35 rear). Finally, wait for it... LT-4 knock module!
\'96FWB BUW-Butt Ugly White: PCMPerformance tune, HDFA w/ swissed filter, 1/2 SLP s.s. catback with H- and Flow Super 50s, oem opti rebuilt 3 times, SS Bars, METCO LCA, Airlift 1000, Monroe SS, PowerTrax No-Slip, CTS wheels with +1 rubber. Finally, yes again... LT-4 knock module!
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post #4 of 24 (permalink) Old 04-02-2019, 08:35 AM
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Quote:
Originally Posted by schlicky13 View Post
I was recently pointed in the direction of the "First" intake manifolds and was curious about them.....

https://firstfuelinjection.com/
Would this be something similar to the Super Ram intake or is this a LS-style manifold for Gen-1 and 2 small blocks??

Gotta ask since I can't see the pictures from the web site....

KW

1996 BBB SS, 398ci Solid Roller LT4, TorqHead 24x Conversion


1995 DCM SS, LS3, V-max 90mm TB, Lingenfelter GT1-1 cam, Headman 1 7/8 LT Headers, 2 1/2" cat-back, 3200 Circle-D TC, 3.73 gears -- 493HP/434TQ @ the wheels (Daily Driver)


2014 Chevy SS; Low Lash Solid Roller 429ci LS3 -- 548HP/464TQ @ the wheels....

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post #5 of 24 (permalink) Old 04-02-2019, 09:32 AM
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Looks like in the Archives there is a gap
from 8/13/2007 post 5184 LT4 Heads - Best Valve Spring Replacement? from 08/13/2007 on page 13 of Engine Performance section

to 8/6/2009 post 3033 TRE fuel pumps? from around 8/6/2009 on page 21 of Engine Performance section

the thread titles are there but no posts. So looks like the forum did lose some data.

your post is from
3127. The "FIRST" long runner LT1 intake.

You can ask the admins if we are SOL or if there is a way to view the data.
Or try yourself
https://archive.org/web/

Good Luck
-ALF out....

EDIT: pretty sure it's gone forever
Post #9
https://www.impalassforum.com/vBulle...-old-days.html
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Last edited by angelo; 04-02-2019 at 09:54 AM. Reason: fixing brain fart
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post #6 of 24 (permalink) Old 04-02-2019, 09:56 AM
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I've had sporadic luck finding TGDL era threads by typing the title into DuckDuck. But there's even 51 hits inside the forum with 'long runner intake', and this one seems either close to, or actually within, that time void:
https://www.impalassforum.com/vBulle...-manifold.html


Links point off in different directions too.


So at least B-'s have 4" runners. Just a dumb ? - did GM use a different length for lighter F/Y-bodies? Not 15" but more than 4"?

\'96SS SOB: SSRI, Herter Tune, Tri-Y II, , 3000 Edge, F/HO bars, METCO extendeds with CV MMC, Bilsteins, currently Vredestein Ultrac Sessanta (315/35 rear). Finally, wait for it... LT-4 knock module!
\'96FWB BUW-Butt Ugly White: PCMPerformance tune, HDFA w/ swissed filter, 1/2 SLP s.s. catback with H- and Flow Super 50s, oem opti rebuilt 3 times, SS Bars, METCO LCA, Airlift 1000, Monroe SS, PowerTrax No-Slip, CTS wheels with +1 rubber. Finally, yes again... LT-4 knock module!

Last edited by 96 Black; 04-02-2019 at 10:00 AM.
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post #7 of 24 (permalink) Old 04-02-2019, 12:36 PM
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Quote:
Originally Posted by 96 Black View Post
So at least B-'s have 4" runners. Just a dumb ? - did GM use a different length for lighter F/Y-bodies? Not 15" but more than 4"?
Unless it's an LT4 intake, an L99 / LT1 intake, is an L99 / LT1 intake.

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post #8 of 24 (permalink) Old 04-02-2019, 04:40 PM Thread Starter
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Quote:
Originally Posted by Marky Dissod View Post
The thread he started on the subject, which I have fading memories of reading with tumescent eyeballs, is either temporarily misplaced or permanently lost.

However:Under 6000RpM, more plenum volume is better for atmospheric engines. Heck, even the LS7 inlet manifold has more plenum volume than our LT1.
For pressurized engines, the benefits of additional plenum volume go beyond 6000RpM.

If you ever managed to make a manifold like this seal properly in a boosted application, the extra plenum volume would ALSO make room for chilling provisions

Shoot Old Coot a PM, invite him to wax prosaic about it here.

Hm, interesting. I have a pretty good idea on how to definitively seal any of these manifolds even under boost, but I lack access to the required equipment. Give me a couple days on a CNC and I could machine in provisions to just o-ring everything and even if I need a custom o-ring, I know a guy that makes obsolete gaskets and o-rings and similar stuff for restoring old cars. I've actually made a couple molds for him on the cnc before. I could make up the needed molds and he could pour whatever I needed. From the looks of it though, I'd believe that the FIRST would be far easier to seal up than the Lingenfelter, the top lid on that is notorious from what I read after buying it. I was less worried when I was planning to stick with NA, as I've got a few tricks up my sleeve for that one. Under boost though it could be more of a challenge. And although I've got an air to air cooler with the kit for the procharger, I'd also considered maybe adding some sort of water or methanol injection system when I want to run all out. Of course I've also heard that NOx can cool the charge rather effectively as well.

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post #9 of 24 (permalink) Old 04-02-2019, 04:42 PM Thread Starter
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Quote:
Originally Posted by KW Baraka View Post
Would this be something similar to the Super Ram intake or is this a LS-style manifold for Gen-1 and 2 small blocks??

Gotta ask since I can't see the pictures from the web site....

KW

I tried pulling some pics, that website is weird. I'll keep trying, but I might just end grabbing some screenshots.

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post #10 of 24 (permalink) Old 04-02-2019, 04:47 PM Thread Starter
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Managed to pull a decent pic from a search engine. It's got some interesting features and is fairly adaptable. I don't know if Old Coot modified it himself for the LT1 (which I assume is mainly just block off the distributor hole in the back) or if he special ordered it. You can even move the throttle body over to the driver side if you want, that's what the side plate there is for, it's just blocking that opening and it's interchangeable to the front. Since it's built for the older TPI motor, it should mount a standard LT1 throttle body just fine, but I also saw a lot of pics on the website with what appeared to be newer LSx style throttle bodies also mounted to these things, which I wouldn't hate.


Edit: I just remembered that I think the bolt pattern is different between the sbc manifold and an LT1 manifold, would probably need to re-drill for that if it can't be ordered with the LT1 specs, but that wouldn't be too big of a deal to accomplish.
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Last edited by schlicky13; 04-02-2019 at 05:04 PM.
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