Aftermarket tpi intake or Lt1???
Thread Starter
Junior Member

Joined: Mar 2004
Posts: 68
Likes: 0
From: Reading Pa
Car: 1989 irocz convert
Engine: 383 tpi
Transmission: 4 spd auto
Aftermarket tpi intake or Lt1???
I am putting a 383 together for my 89 convertable. I was wondering if an aftermarket tpi intake or a stock Lt1 intake would be best suited for the fuel delivery job. Joined: Feb 2001
Posts: 13,758
Likes: 560
From: Cincinnati, OH
Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
LT1. It is really hard to max this thing out. It has so many benifits and an almost unlimited potential right out of the box.
What do you plan to do with the car?
Not sure what either has to do with fuel delivery...maybe air delivery. How much air does your engine require?
I was wondering if an aftermarket tpi intake or a stock Lt1 intake would be best suited for the fuel delivery job.
Not sure what either has to do with fuel delivery...maybe air delivery. How much air does your engine require?
Thread Starter
Junior Member

Joined: Mar 2004
Posts: 68
Likes: 0
From: Reading Pa
Car: 1989 irocz convert
Engine: 383 tpi
Transmission: 4 spd auto
I really do not have any specific plans for the car besides driving the hell out of it on the street.
Removing a few mustang and ***** doors along the way would be a nice bonus!!
A bunch of senior members on this site say you must get bigger injectors when putting in a bigger cubic inch motor. I was just weighing out my options on replacing the old 305 tpi and intake or working with it.
Seems like the consensus is just to go with an LT1. How much is a new one??
Removing a few mustang and ***** doors along the way would be a nice bonus!!
A bunch of senior members on this site say you must get bigger injectors when putting in a bigger cubic inch motor. I was just weighing out my options on replacing the old 305 tpi and intake or working with it.
Seems like the consensus is just to go with an LT1. How much is a new one??
Member
Joined: Sep 2002
Posts: 158
Likes: 0
From: Elizabethtown, KY
Car: 89 Formula 350
Engine: L98 w/ Stealthram
Transmission: 700R4
Axle/Gears: 9 bolt 3.27
Talk to John Millican.
http://www.lt1intake.com
http://www.lt1intake.com
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Thread Starter
Junior Member

Joined: Mar 2004
Posts: 68
Likes: 0
From: Reading Pa
Car: 1989 irocz convert
Engine: 383 tpi
Transmission: 4 spd auto
Upon further review i have decided to just work with the old tpi intake. I know i need to replace the injectors with bigger ones.
Anyone know what brand and size injectors i should be looking for??
Thanks in advance for any help!!
Anyone know what brand and size injectors i should be looking for??
Thanks in advance for any help!!
Junior Member
Joined: Nov 2004
Posts: 95
Likes: 0
Car: 1989 Iroc_Z
Engine: 350 TPI
Transmission: 700r4
Get a holley stealth ram intake. http://www.holley.com/HiOctn/ProdLin...MSM/7540P.html
Great aftermarket mod, if you dont care about emissions. 30-40 hp gain. It is a higher rise intake so you need some good hood clearence so now wouldnt be a bad time to use this as an excuse to pick up a nice cowl. Also note that the stock TPI plenum has 2 thick metal pieces inside it aburting the air flow, for some reason gm put these inside. Unless you want to port the plenum yourself your flow wont be as good. Stealth ram is only 350 satin finished. Not a bad intake at all.
Great aftermarket mod, if you dont care about emissions. 30-40 hp gain. It is a higher rise intake so you need some good hood clearence so now wouldnt be a bad time to use this as an excuse to pick up a nice cowl. Also note that the stock TPI plenum has 2 thick metal pieces inside it aburting the air flow, for some reason gm put these inside. Unless you want to port the plenum yourself your flow wont be as good. Stealth ram is only 350 satin finished. Not a bad intake at all.
Junior Member
Joined: Aug 2002
Posts: 31
Likes: 0
From: Reading, PA
Car: 1970 Tube chassis Camaro
Engine: 632 Big Chief
Transmission: Rossler TH400
Yeah dude, I think the Stealth-Ram is the way to go...
I think we can get it under your hood... If not, Jensen can mill a little off the runners and maybe give you another 1/2" or so of clearence...
I think you should order it awhile, so we can lay it on top of the old 305 to check for hood clearence...
I think we can get it under your hood... If not, Jensen can mill a little off the runners and maybe give you another 1/2" or so of clearence...
I think you should order it awhile, so we can lay it on top of the old 305 to check for hood clearence...
Supreme Member
iTrader: (1)
Joined: Feb 2000
Posts: 2,361
Likes: 1
From: Savannah, GA
Car: 1997 Jeep Wrangler
Engine: 4.0L
Transmission: 5 speed
Axle/Gears: 8.8 rear, 4.56 gears, 4:1 transfer
Guys/gals, he called off the intake swap. He is now asking for injector info.........
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