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305 manual vs. 350 automatic (both TPI)

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Old Oct 8, 2004 | 01:51 PM
  #1  
Liquid_Metal's Avatar
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From: Finland
Car: Red '89 GTA
Engine: TPI LB9
Transmission: T-5
305 manual vs. 350 automatic (both TPI)

What are the differences in handling and performance between these two?

The reason why I ask is that a friend who had driven a 350 auto said my 305 manual seemed to have noticeably less low end torque/power. The wheels wont't spin as easily at low rpm:s.... are these cars that different or is there something wrong with mine. In this case, what?

Should also add that my car has no cat and is chiptuned so about 250 hp. Shouldn't that make it atleast equal to a stock 350???
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Old Oct 8, 2004 | 01:53 PM
  #2  
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From: you aint stealing my car..
Car: 1984 Z28
Engine: 5.7
Transmission: Auto w/ shift kit
maybe your guess of 250hp is a bit much well more than a bit
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Old Oct 8, 2004 | 02:09 PM
  #3  
Liquid_Metal's Avatar
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From: Finland
Car: Red '89 GTA
Engine: TPI LB9
Transmission: T-5
I didn't make the guess so don't know... How much would these mods give then? How many hp:s should my car have stock?
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Old Oct 8, 2004 | 02:51 PM
  #4  
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From: you aint stealing my car..
Car: 1984 Z28
Engine: 5.7
Transmission: Auto w/ shift kit
stock 230@4600 hp and 3200 ft/lbs but the site also says take 5-10hp from the tpi on birds for intake design

i dont know the 350 year your friend drove but most power is this year 245@4400 345@3200 92 91 90 only 15more hp stock but 45 ft/lbs which is alot and u notice the tourque the most

i dont know estimates with though mods
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Old Oct 8, 2004 | 02:58 PM
  #5  
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From: Saskatoon, SK, Canada
Car: '83 Z28, '07 Charger SRT8
Engine: 454ci, 6.1 Hemi
Transmission: TH350, A5
Axle/Gears: 2.73 posi, 3.06 posi
The 350 does have quite a bit more torque than the 305. Any handling difference you might feel would probably be the rear end getting squirelly by getting on the throttle too much.

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Old Oct 8, 2004 | 06:31 PM
  #6  
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From: Norfolk, VA. USA
Car: 86 Trans Am, 88 Formula
Engine: 95LT4, 305TPI
Transmission: T56, T5
What brand/size tires are you running, that makes a huge difference in tire spin.
My 86 LG4 5 Speed Trans Am would roast 225/60/15's all day long without dumping the clutch at low speeds/rpms. With the same setup and 275/40/17 BFG KDW tires the car would bog a bit and then go with no tire spin at all.
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