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305tbi 350tbi

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Old Jan 3, 2009 | 09:27 PM
  #1  
blkfirebird91's Avatar
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From: New Milford CT
Car: 1991 Trans Am
Engine: 305tbi to 350 carb'd
Transmission: 700r4
Axle/Gears: Stock
305tbi 350tbi

i just bought a 350tbi and i have a 305 tbi in my car i have plans for the 350 like first a carb and intake because i dont really like the ecm( computer stuff) now i have a question is this going to be a better motor then what i have im swapping my serpentine setup over to it and my headers. Can i do alot more to this motor and get way more power then the 305? any answers would be appreciated thanks .

head casting #14102191
block casting #14093638

heres a pic of the 350 and what ive done so far

305tbi 350tbi-engine.jpg

Last edited by blkfirebird91; Jan 3, 2009 at 09:41 PM.
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Old Jan 3, 2009 | 11:50 PM
  #2  
five7kid's Avatar
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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 are great for low RPM, low valve lift. Try to do much more than stock, and you'll need better heads.
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Old Jan 4, 2009 | 08:39 AM
  #3  
blkfirebird91's Avatar
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From: New Milford CT
Car: 1991 Trans Am
Engine: 305tbi to 350 carb'd
Transmission: 700r4
Axle/Gears: Stock
Re: 305tbi 350tbi

im going carbed like i said do you know five7kid whats the best cam i can go right now with out changing my stock heads for now like a part number also can i get like a high rise intake with a 600cfm holley carb because im gonna buy a carb off of Den71ta its a holley 4BBL electric choke so if anyone knows of a high rise that will fit this motor and the best cam i can go with for stock heads that would be great thanks?

btw thanks five7kid for some infor on those heads so are they pretty good for now and would you know of the redline in this type of motor thanks?

Last edited by blkfirebird91; Jan 4, 2009 at 08:44 AM.
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Old Jan 4, 2009 | 08:49 AM
  #4  
blkfirebird91's Avatar
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From: New Milford CT
Car: 1991 Trans Am
Engine: 305tbi to 350 carb'd
Transmission: 700r4
Axle/Gears: Stock
Re: 305tbi 350tbi

Originally Posted by five7kid
The heads are great for low RPM, low valve lift. Try to do much more than stock, and you'll need better heads.
hey it should be better then that 305 in my car now right five7kid. I can do alot more with this motor also right?
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Old Jan 4, 2009 | 06:52 PM
  #5  
five7kid's Avatar
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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
I wouldn't bother with a cam upgrade until doing heads as well.

Most factory cams don't make any power above 4500 RPMs.
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Old Jan 4, 2009 | 08:43 PM
  #6  
blkfirebird91's Avatar
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Posts: 321
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From: New Milford CT
Car: 1991 Trans Am
Engine: 305tbi to 350 carb'd
Transmission: 700r4
Axle/Gears: Stock
Re: 305tbi 350tbi

yeah but this motor only has 11k miles on it, it still has alot of life in it thats why i dont really wanna buy a set of heads right now.
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