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Stock tune with cam swap

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Old Mar 15, 2008 | 10:16 AM
  #1  
335_GTA's Avatar
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From: wapak,ohio
Car: 1991 GTA trans am
Engine: 305 tpi
Transmission: 700r4
Axle/Gears: 3.73
Stock tune with cam swap

Im getting ready to start the lt1 cam swap in my 305 tpi

The car now runs 14.4 on motor and 13.5 on 100shot

But its the stock cam so I figured I could gain a little with the lt1 cam swap


But im worried that the stock tune is not going to run with this cam.... I have heard that it does and I have heard that it doesnt...... So does anyone have any ideas on if this is going to work?

We just put a zz4 cam in my mostly stock 350 tpi and it runs great without tuning..... But I dunno any imput is great.
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Old Mar 15, 2008 | 12:57 PM
  #2  
maroon88iroc's Avatar
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From: mid GA
Car: 88 IROC
Engine: 305 TPI w/ l98 cam
Transmission: T5 5-speed
Axle/Gears: 3.45 posi disc 9 bolt
Re: Stock tune with cam swap

Originally Posted by 335_GTA
Im getting ready to start the lt1 cam swap in my 305 tpi

The car now runs 14.4 on motor and 13.5 on 100shot

But its the stock cam so I figured I could gain a little with the lt1 cam swap


But im worried that the stock tune is not going to run with this cam.... I have heard that it does and I have heard that it doesnt...... So does anyone have any ideas on if this is going to work?

We just put a zz4 cam in my mostly stock 350 tpi and it runs great without tuning..... But I dunno any imput is great.
just curious as to what mods you have on your 305 now to run a 14.4?
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Old Mar 15, 2008 | 04:18 PM
  #3  
335_GTA's Avatar
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From: wapak,ohio
Car: 1991 GTA trans am
Engine: 305 tpi
Transmission: 700r4
Axle/Gears: 3.73
Re: Stock tune with cam swap

3.73 gears
1.6 rr
ported plenium
ported intake
ported runners
afpr
airfoil
t/b bypass
edelbrock shorties
3" exhaust
Flowmaster 80 series
good tires
factory aluminum driveshaft



Thats all that I can think of off the top of my head...

The car runs real good but just looking to see what it can do.
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Old Mar 15, 2008 | 08:00 PM
  #4  
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From: louisville, ky
Axle/Gears: '01 3.42 10 bolt
Re: Stock tune with cam swap

it will run with the LT1 cam, but as with any modification, it will not live up to it's potential without proper tuning.
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Old Mar 15, 2008 | 09:16 PM
  #5  
335_GTA's Avatar
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From: wapak,ohio
Car: 1991 GTA trans am
Engine: 305 tpi
Transmission: 700r4
Axle/Gears: 3.73
Re: Stock tune with cam swap

So i will have a slight gain but not the complete one b/c of the tuning issue?
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Old Mar 15, 2008 | 09:56 PM
  #6  
Orr89RocZ's Avatar
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From: Pittsburgh PA
Car: 89 Iroc-z
Engine: 555 BBC Turbo
Transmission: TH400
Axle/Gears: MWC 9” 3.00
Re: Stock tune with cam swap

yep i'd say it will run ok with that LT1 cam, but yes, a tune will get the most out of it. A tune will wake up a stock motor let alone a cammed bolt on motor.

but be careful with LT1 cam and 1.6 rockers, that will probly put you over max lift for the heads which is around .480"
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Old Mar 15, 2008 | 10:03 PM
  #7  
335_GTA's Avatar
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From: wapak,ohio
Car: 1991 GTA trans am
Engine: 305 tpi
Transmission: 700r4
Axle/Gears: 3.73
Re: Stock tune with cam swap

Well thats what im going to try..... replace the springs and see if I can get that used cam fit and the 1.6 rr

Hope all goes well
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Old Mar 15, 2008 | 10:32 PM
  #8  
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From: Pittsburgh PA
Car: 89 Iroc-z
Engine: 555 BBC Turbo
Transmission: TH400
Axle/Gears: MWC 9” 3.00
Re: Stock tune with cam swap

if it dont clear, then run 1.5 rockers or get valvespring shims and offset retainers or offset locks to raisethe assembly up abit to get more clearance
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Old Mar 15, 2008 | 10:56 PM
  #9  
335_GTA's Avatar
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From: wapak,ohio
Car: 1991 GTA trans am
Engine: 305 tpi
Transmission: 700r4
Axle/Gears: 3.73
Re: Stock tune with cam swap

Thats what I planned on doing...... Im going to start tonight and see what happens
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