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how good is this set up?

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Old Dec 21, 2002 | 11:54 PM
  #1  
MattW's Avatar
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From: Greenwood, Indiana
Car: 1984 Trans Am
Engine: Vortec 355
Transmission: TH-700R4
Axle/Gears: GM Axles and GM 3.73
how good is this set up?

SBC 350


-vortec heads
-cam: Specifications:
* Advertised duration: 282 intake/292 exhaust
* Duration at .050 in. cam lift: 224 intake/234 exhaust
* Gross valve lift: .465 in. intake/.488 in. exhaust
* Lobe separation: 114 degrees
* RPM range: 2,200 to 5,700

-performer RPM intake

700R4 stock or 2000stall
3.73 gears


what 1/4 mile would it get me?
would it compare to a LT1 or LS1?
thanks
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Old Dec 22, 2002 | 07:11 PM
  #2  
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
The heads will need a good bit of work to handle that much lift. You'll need a Vortec-specific manifold. The lobe separation sounds a little high, but should be okay for a good idle.

You're going to need more stall. At least 2500.

What are your exhaust plans?

Too many "power to the pavement" unknowns to give a good ET estimate, but you should be well over 100 mph.
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Old Dec 23, 2002 | 01:14 AM
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MattW's Avatar
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From: Greenwood, Indiana
Car: 1984 Trans Am
Engine: Vortec 355
Transmission: TH-700R4
Axle/Gears: GM Axles and GM 3.73
well the motor is already done and has been in another car, he is rebuilding it for me.........its already had the right mods to the heads to make it handle the lift............would a XE262 or 268 cam b better? cuz that is what i wanted to put in it...........

also the reason why i asked what it would run in my car is becuz his car has 3.08 gears with a 4-speed and a crappy carb'
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Old Dec 23, 2002 | 01:48 PM
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From: Annandale, VA
Car: 1991 Formula Firebird
Engine: 2001 LS1 Modded
Transmission: 2001 4L60E Yank SS3600 TC
Springs and pushrods may buy you some more top end. Are you using F/I or carb?
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Old Dec 24, 2002 | 01:52 AM
  #5  
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From: Greenwood, Indiana
Car: 1984 Trans Am
Engine: Vortec 355
Transmission: TH-700R4
Axle/Gears: GM Axles and GM 3.73
carb
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Old Dec 26, 2002 | 04:46 AM
  #6  
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From: Maryland; USA
sounds like a pretty good setup.
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Old Dec 26, 2002 | 08:45 PM
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From: Greenwood, Indiana
Car: 1984 Trans Am
Engine: Vortec 355
Transmission: TH-700R4
Axle/Gears: GM Axles and GM 3.73
well i called up comp cams and they told me that this cam would be the best for my setup


http://www.compcams.com/information/...umber=12-404-4


now how does this compare to a XE 262 or XE268
cuz i have roughly $100 in store credit at jegs for returning a part so i would like to use that money for a cam and i dont think they have the one that they suggest.........
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Old Dec 26, 2002 | 08:50 PM
  #8  
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From: Greenwood, Indiana
Car: 1984 Trans Am
Engine: Vortec 355
Transmission: TH-700R4
Axle/Gears: GM Axles and GM 3.73
sorry i guess i should have researched a little more b4 i said that jeg's didnt have it
cuz they do

but its 120 whereas XE cams are only 98


im still wondering if there is a big diff in how they will make my motor perform.....
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