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lt4 hot cam with stock intake?

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Old Jan 26, 2011 | 03:06 PM
  #1  
89lt1's Avatar
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From: silver lake indiana
Car: 1989 firebird formula, 1991 z/28
Engine: none LSX! one day, 350tpi
Transmission: none t56 one day, t5
Axle/Gears: 9-bolt 3.45, 10 bolt 3.73
lt4 hot cam with stock intake?

has any one done this? if you have do you have any results. I have a 350tpi. I am aware of the intake's restriction. Just curious. if it doesnt work that well i have an lt1 intake i may convert.
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Old Jan 26, 2011 | 03:09 PM
  #2  
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From: Chicagoland Suburbs
Car: 1989 Trans Am GTA
Engine: LT1, AFR 195cc, 231/239 LE cam.
Transmission: M28 T56
Axle/Gears: 3.23 10bolt waiting to explode.
Re: lt4 hot cam with stock intake?

Originally Posted by 89lt1
has any one done this? if you have do you have any results. I have a 350tpi. I am aware of the intake's restriction. Just curious. if it doesnt work that well i have an lt1 intake i may convert.
It'll run and drive.

But you'll be missing out on a bunch of power that could be had with a matching intake.

You can run it with a TPI style system as long as its all hogged out and upgraded.

A LT4 hot-cam would probably run great with a FIRST LTR setup.
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Old Jan 26, 2011 | 03:10 PM
  #3  
89lt1's Avatar
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From: silver lake indiana
Car: 1989 firebird formula, 1991 z/28
Engine: none LSX! one day, 350tpi
Transmission: none t56 one day, t5
Axle/Gears: 9-bolt 3.45, 10 bolt 3.73
Re: lt4 hot cam with stock intake?

How well would the lt1 intake work? and how high do you think it will pull w/ the stock intake
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Old Jan 26, 2011 | 05:13 PM
  #4  
Thirdgen89GTA's Avatar
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From: Chicagoland Suburbs
Car: 1989 Trans Am GTA
Engine: LT1, AFR 195cc, 231/239 LE cam.
Transmission: M28 T56
Axle/Gears: 3.23 10bolt waiting to explode.
Re: lt4 hot cam with stock intake?

Originally Posted by 89lt1
How well would the lt1 intake work? and how high do you think it will pull w/ the stock intake
Max power at 5000 to 5500 I'd guess. Not much use spinning beyond that. The heads will hold it back a lot.

My stock head/cam/intake LT1 makes max power around 5k with all boltons. It's a b-body lt1, smaller cam than F and Y cars.
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Old Jan 26, 2011 | 08:40 PM
  #5  
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From: Warrior AL
Car: 89 Iroc
Engine: 350/Dart heads/hotcam/TPI
Transmission: T56
Axle/Gears: 3.45 9bolt
Re: lt4 hot cam with stock intake?

I used the LT4 Hot cam in my build, with TPI. I have fully siamesed SLP Runners 2.5 inches in siamesed in my stock base with the base ported to a 1205 Gasket. My heads are ported Iron Eagles. Here is the thread on the build.
https://www.thirdgen.org/forums/tpi/...-my-305-a.html
I made 290/358 @ the wheels. The power under the curve is amazing. I absolutely love the combo.
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Old Jan 26, 2011 | 09:06 PM
  #6  
Thirdgen89GTA's Avatar
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Joined: Sep 2004
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From: Chicagoland Suburbs
Car: 1989 Trans Am GTA
Engine: LT1, AFR 195cc, 231/239 LE cam.
Transmission: M28 T56
Axle/Gears: 3.23 10bolt waiting to explode.
Re: lt4 hot cam with stock intake?

Originally Posted by Artisan
I used the LT4 Hot cam in my build, with TPI. I have fully siamesed SLP Runners 2.5 inches in siamesed in my stock base with the base ported to a 1205 Gasket. My heads are ported Iron Eagles. Here is the thread on the build.
https://www.thirdgen.org/forums/tpi/...-my-305-a.html
I made 290/358 @ the wheels. The power under the curve is amazing. I absolutely love the combo.
Yeah, but your combo is no-where near close to what he's proposing.

Your combo is well matched, you've upgraded everything. TPI's weakness is the poor flowing heads and poor flowing stock intake. Without upgrading both of those a cam swap will leave alot of potential on the table.

3.8 TransAm did car he called "Thor". Thor was making some serious power and trapping very nicely. It was a vortec headed, ported TPI setup with a LT4 hot-cam.

The original poster's proposal of just doing the hot-cam and on a stock intake will produce very little gain and cause a whole bunch of problems.
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Old Jan 26, 2011 | 09:21 PM
  #7  
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From: Warrior AL
Car: 89 Iroc
Engine: 350/Dart heads/hotcam/TPI
Transmission: T56
Axle/Gears: 3.45 9bolt
Re: lt4 hot cam with stock intake?

I agree with what you are saying. Anytime you change cams you must do the supporting mods or its a complete waste of time
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