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LT1 intake and cam

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Old Dec 11, 2004 | 10:22 PM
  #1  
evoluzione1's Avatar
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From: ohio
Car: 88IROC vert and a 83 w/evo body
Engine: 400 and 350
Transmission: T56 and 700R4
Axle/Gears: 323 and 373
LT1 intake and cam

Wanted to know if any know how much power could be gained from putting an lt1 intake and lt1 cam on my 305.
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Old Dec 11, 2004 | 10:34 PM
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From: Las Vegas
Car: '88 Trans Am
Engine: 5.7L TPI
Transmission: Slushbox
Axle/Gears: 3.27
i would say possibly 20hp it rally depends on the rest of the acc.ie:headers,ex.....
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Old Dec 12, 2004 | 12:10 AM
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From: San Pedro, Ca
Car: White KSwisses
Engine: 5.3L Gen III
The Lt1 cam is an alright upgade on a 305, but I really dont think u want to put an LT1 intake on a 305.
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Old Dec 12, 2004 | 04:56 AM
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Car: '88 Trans Am
Engine: 5.7L TPI
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Axle/Gears: 3.27
why not it will be just like the 4.3L v8 found in the caprice and it works fine!go for it you can get an lt1 intake with fuel rails for 75.00 and a cam for 50.00 you should be able to do the entire swap for less than 700.00
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Old Dec 13, 2004 | 12:19 AM
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From: San Pedro, Ca
Car: White KSwisses
Engine: 5.3L Gen III
yea run an LT1 intake with ur 305
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Old Dec 13, 2004 | 12:55 AM
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Originally posted by cali92RS
yea run an LT1 intake with ur 305
bahh....let him have his fun. When he gets bored with it he can swap it to a 350.
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Old Dec 13, 2004 | 06:17 AM
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From: Changing Tires
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Nothing wrong with a LB9, its the L03 that stinks. I know guys with built and blown LB9's that can burnout down an entire street. Anyway, you can probably expect a little more top end power compared to the TPI intake, not sure on exact numbers though.
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Old Dec 13, 2004 | 10:10 AM
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Originally posted by 92droptopws6
why not it will be just like the 4.3L v8 found in the caprice and it works fine!...


As if we haven't tried drilling this into everyone's head already. It all about the heads. Heads, heads, heads. If he had heads comparable to what are on that motor, then sure, run the intake. If he is runnignstock heads... ever hear the horror stories of mismatched parts?
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Old Dec 17, 2004 | 08:54 PM
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From: Roscoe, IL
Car: 1991 Trans Am
Engine: LQ4
Transmission: T-56
Axle/Gears: 3.70
i port matched my stock 305 heads to the lt1 intake, lt1 cam, comp rockers, custom chip, slp 1 3/4, 3.73s was good for 13.7 on a 2.0 60' with a weak clutch. before you flame happy guys get going, i payed 5 bucks for the cam, so i figured why the hell not, everything else will get reused on the 383 and it was only a matter of time til the 305 dies, which it finally did with 144xxx on the clock. shouldve sprayed it
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Old Dec 17, 2004 | 09:11 PM
  #10  
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From: ohio
Car: 88IROC vert and a 83 w/evo body
Engine: 400 and 350
Transmission: T56 and 700R4
Axle/Gears: 323 and 373
You know I hear a lot of slaming the 305 but my first one was a L03 and Before I pulled it out to replace with a 400 I had TPI on it and a 488 lift cam and I was running 14.30's. Anyways How can everyone slame a 5.0 when there are a crap load of 4 bangers with less cub's pumping out more power then 5.0 I should be able to get what I want from my little 305. So one day I will hit the combination that works, LT1 intake, cam amd up the compression, whatever, but it shouldn't cost that much if I keep asking questions.
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Old Dec 17, 2004 | 10:48 PM
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From: Kirksville MO
Car: 1987 trans am GTA - sold
Engine: L98
Transmission: 700r4
It's not that it isn't possible to get lots of power from the 305 - it is that there is not as much research and development for the engine as the Asian cars have. Those guys spend thousands of hours and millions of dollars to get 400 h.p. out of a 2.0 engine. The new Evo MR is rediculous. It is the fastest production car in the world period. Even $500,000 production cars cannot out run it in the quarter, 0-60, or top end. When someone puts that kind of effort into the 305 - along with tons of other severe mods for the rest of the car - it might be possible to be really fast. Until then, it is where the most development is - and the 350s seem to have it from what I can tell.

In fact, now that everything is going to the LS1 - it is harder to figure out what to do with the L98 for me. Open any mag - and there are parts gallore for those engines. When I called TPIS to get an idea of how to put serious HP into my L98 - they said after about $4500 I could start keeping up with the LS1 cars. Wow - thats great considering that I can buy a low mileage LS1-T56 package with air and harness for $2500! Go figure.
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Old Dec 18, 2004 | 02:48 PM
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From: SW Chicago 'burbs
Car: American Iron Firebird
Engine: The little 305 that could.
Transmission: Richmond T-10
Axle/Gears: Floater 9" - 3.64 gears
Originally posted by tomclf
When someone puts that kind of effort into the 305 - along with tons of other severe mods for the rest of the car - it might be possible to be really fast. Until then, it is where the most development is - and the 350s seem to have it from what I can tell.
The point is though, it makes no sense to do it with a 3.736" bore and a 3.46" stroke. If you were going to do it anyway, do it with a 4.020 bore and a 3" stroke [basically your good ol' Ford 302 combo with an overbore]. You'll go faster with that combo 305 because you'll be able to run bigger valves and not have the problem of shrouding the valve or having the valve hit the block [2.02 valve in a 305 will most likely hit without clearancing].
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Old Dec 19, 2004 | 07:43 AM
  #13  
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From: Savannah, GA
Car: 1997 Jeep Wrangler
Engine: 4.0L
Transmission: 5 speed
Axle/Gears: 8.8 rear, 4.56 gears, 4:1 transfer
Originally posted by tomclf
..........The new Evo MR is rediculous. It is the fastest production car in the world period. Even $500,000 production cars cannot out run it in the quarter, 0-60, or top end. ...........
Yes high 12's is impressive for a stock 2.0L import out of the box. I wouldn't call it "the fastest production car in the world period" though. Don't even bring up "top end" unless it can do 212mph.

Back to subject, it is OK to run a LT1 intake (well a L99 intake really) on a stock 305. I have had several customers do the same thing with what they say are very impressive results. True heads and exhaust would make alot of difference as would a 350 but if all you have is a 305 then by all means mod it...........
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Old Dec 19, 2004 | 02:00 PM
  #14  
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From: Kirksville MO
Car: 1987 trans am GTA - sold
Engine: L98
Transmission: 700r4
Yes high 12's is impressive for a stock 2.0L import out of the box. I wouldn't call it "the fastest production car in the world period" though. Don't even bring up "top end" unless it can do 212mph.
Just to clarify - the October 2004 issue of CAR magazine tested the new EVO against what the Euro writers call the world's fastest supercar - the Pagini Zonda. The EVO outran the Zonda in 0-60 - would translate to a faster quarter time - it tapped out at 175mph while the Zonda could break into 200mph - I had to reread - I had the numbers wrong on the top end. Still amazing for a street car with a 3 year warranty that can handle a family of five comfortably.

Getting to the point - the R&D for more modern vehicles is amazing. The best R&D for our cars as far as I can tell is these boards - guys on the streets trying new things. The industry has moved on and we are trying to learn how to keep up. I have learned more about my car from guys who post thier stories here than I have anywhere else. Even books on TPI are somewhat outdated. Finding out that a LT1 intake will work is wonderful - But it is going to take some doing and great skills to get it done. What I am Finding out - to have my car - is going to take great research and creativity on our parts - the auto industry is not going to do it for us.
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Old Dec 22, 2004 | 07:12 PM
  #15  
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From: pa.
Car: 1988 formula
Engine: 350 tpi
Transmission: 700r4
i think the lt1 intake would kill off some tq.
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Old Dec 22, 2004 | 10:50 PM
  #16  
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From: Roscoe, IL
Car: 1991 Trans Am
Engine: LQ4
Transmission: T-56
Axle/Gears: 3.70
but gain hp
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Old Dec 23, 2004 | 02:17 AM
  #17  
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From: Elgin, IL
Car: 1997 Corvette
Engine: LS1
Transmission: 4L60E
Axle/Gears: 2.73 IRS
I have yet to get my 305 up and running with the LT1 heads and intake yet, but I'm going to give the heads to my cousin on Christmas Eve to get them welded up, and then all I have to do is send my intake to John to get the distributor hole drilled. Then all I have to do is buy a set of headers, and its all going to proceed. My cam, injectors, and springs are all here. The possibility of buying a ministarter and 1.6 true roller rockers may delay my progress a bit too, we'll see.

Anyways, I think its going to be a very solid combo and I'm hoping to hit mid-low 13s with everything setup right. That is, with suspension mods and gear changes and either a T-5/T-56 or a new torque converter.
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