Swap A 350 TPI Into A 92 Firebird
Swap A 350 TPI Into A 92 Firebird
So as the title suggestions, I'm looking at eventually swapping a 350 into my Firebird. It currently has a 305 TBI, with an automatic transmission.
I wouldn't be doing the swap anytime soon, I'm more so looking at what kind of 350 I should put in it. I'd like to pick up a beat up engine, and rebuild it over time. The current engine has somewhere around 170k miles on it, and I'd like to have an engine ready when that day comes. I feel I would enjoy rebuilding the engine, and it'd help me learn a little more about them.
If anyone has any suggestions on what type of 350 I should put in it, feel free to post. Off the top of my head I was thinking of just trying to find the 350 that they put in my year, just to make the swap a bit easier down the road. I appreciate any help.
I'd also like to add in, if it is possible to convert an auto to a manual, and about how hard it is to do so.
I wouldn't be doing the swap anytime soon, I'm more so looking at what kind of 350 I should put in it. I'd like to pick up a beat up engine, and rebuild it over time. The current engine has somewhere around 170k miles on it, and I'd like to have an engine ready when that day comes. I feel I would enjoy rebuilding the engine, and it'd help me learn a little more about them.
If anyone has any suggestions on what type of 350 I should put in it, feel free to post. Off the top of my head I was thinking of just trying to find the 350 that they put in my year, just to make the swap a bit easier down the road. I appreciate any help.
I'd also like to add in, if it is possible to convert an auto to a manual, and about how hard it is to do so.
Joined: Apr 2005
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From: Not in Kansas anymore
Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: Swap A 350 TPI Into A 92 Firebird
Joined: Apr 2005
Posts: 7,736
Likes: 14
From: Not in Kansas anymore
Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: Swap A 350 TPI Into A 92 Firebird
Spend enough $$ and you can get a 454ci SBC that is same size as a 305 on the outside
Click here
http://www.hotrod.com/techarticles/e...e/viewall.html
A truck motor will be different to a Hp engine
But once you rebuild it,what it was has no bearing on what it will be if you change internal parts
You can buy any 350 engine and make it into anything you want;$$$ permitting
Last edited by vetteoz; Jan 9, 2012 at 05:52 AM.
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Re: Swap A 350 TPI Into A 92 Firebird
^^^ What he said
Be aware though, if you use a newer 350, you can get one with the factory roller cam setup; which is MUCH cheaper to build than the original roller system with link bars, and both more reliable and better running than a non-roller. A 96-up truck motor would be a great core to start out with for that reason, as well as having the best stock heads that 350s have ever come with.
I would not recommend swapping "TPI" into a car. EFI of various other sorts, yes; TPI, no. Not only is it a handicap to the motor's potential, but also, pretty tough to get a swap right, because you will basically need a complete donor car to get all the parts off of. Not the best possible path.
Be aware though, if you use a newer 350, you can get one with the factory roller cam setup; which is MUCH cheaper to build than the original roller system with link bars, and both more reliable and better running than a non-roller. A 96-up truck motor would be a great core to start out with for that reason, as well as having the best stock heads that 350s have ever come with.
I would not recommend swapping "TPI" into a car. EFI of various other sorts, yes; TPI, no. Not only is it a handicap to the motor's potential, but also, pretty tough to get a swap right, because you will basically need a complete donor car to get all the parts off of. Not the best possible path.
Re: Swap A 350 TPI Into A 92 Firebird
Why is TPI a handicap to the motors potential? I thought it was considered a staple in performance engines, if not then what would be better to put in it? Like I said I'd be rebuilding this over time, so if I can pick up a quality part over a junk part and have to spend a little bit more, that's ok. I'm just not looking to spend $600 that will gain me 1hp, I'm not building this to see just how much I can pull out of it. More or so I'm looking to build the best for the cheapest.
Joined: Apr 2005
Posts: 7,736
Likes: 14
From: Not in Kansas anymore
Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: Swap A 350 TPI Into A 92 Firebird
http://xtremecarzone.com.au/index.php?showtopic=386
Forget what engine or the Hp numbers in the writeup.
Just focus on the rev range and torque curve of each intake in the graphs and where it runs out of steam
Long tube runner intakes like TPI all flat line about 5K with awesome bottom end torque
Short runner intakes run at higher revs but give up some bottom end
Pick your poison.
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Re: Swap A 350 TPI Into A 92 Firebird
Read this
http://xtremecarzone.com.au/index.php?showtopic=386
Forget what engine or the Hp numbers in the writeup.
Just focus on the rev range and torque curve of each intake in the graphs and where it runs out of steam
Long tube runner intakes like TPI all flat line about 5K with awesome bottom end torque
Short runner intakes run at higher revs but give up some bottom end
Pick your poison.
http://xtremecarzone.com.au/index.php?showtopic=386
Forget what engine or the Hp numbers in the writeup.
Just focus on the rev range and torque curve of each intake in the graphs and where it runs out of steam
Long tube runner intakes like TPI all flat line about 5K with awesome bottom end torque
Short runner intakes run at higher revs but give up some bottom end
Pick your poison.
Can the auto transmission be swapped to a stick without that much modification?
Joined: Sep 2005
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Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: Swap A 350 TPI Into A 92 Firebird
Cheeeeeeeeeeeeeeeeepest?
Keep the TBI; upgrade to 350 injectors, knock sensor, ESC module, and chip.
You want cheeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeep, or you want GOOD? Not at all the same thing.
You get, AT BEST, what you pay for. Pay the least, you get ..... ,,,,, you do the math.
Depends on your definition of "that much".
Is brain surgery "that much" work for a brain surgeon? Maybe, maybe not. Do you want ME rattling around inside your skull with a scalpel? Also, probably not.
Personally I find it MUCH easier (there's that elusive "much" again) to buy a stick shift car and put the motor I want in it, than to buy an auto car and swap it to stick. But that's just me.... but you gotta remember, I'm far from the sharpest knife in the drawer.
Keep the TBI; upgrade to 350 injectors, knock sensor, ESC module, and chip.
You want cheeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeep, or you want GOOD? Not at all the same thing.
You get, AT BEST, what you pay for. Pay the least, you get ..... ,,,,, you do the math.
Can the auto transmission be swapped to a stick without that much modification?
Is brain surgery "that much" work for a brain surgeon? Maybe, maybe not. Do you want ME rattling around inside your skull with a scalpel? Also, probably not.

Personally I find it MUCH easier (there's that elusive "much" again) to buy a stick shift car and put the motor I want in it, than to buy an auto car and swap it to stick. But that's just me.... but you gotta remember, I'm far from the sharpest knife in the drawer.
Last edited by sofakingdom; Jan 9, 2012 at 08:12 PM.
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Re: Swap A 350 TPI Into A 92 Firebird
Cheeeeeeeeeeeeeeeeepest?
Keep the TBI; upgrade to 350 injectors, knock sensor, ESC module, and chip.
You want cheeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeep, or you want GOOD? Not at all the same thing.
You get, AT BEST, what you pay for. Pay the least, you get ..... ,,,,, you do the math.
Depends on your definition of "that much".
Is brain surgery "that much" work for a brain surgeon? Maybe, maybe not. Do you want ME rattling around inside your skull with a scalpel? Also, probably not.
Personally I find it MUCH easier (there's that elusive "much" again) to buy a stick shift car and put the motor I want in it, than to buy an auto car and swap it to stick. But that's just me.... but you gotta remember, I'm far from the sharpest knife in the drawer.
Keep the TBI; upgrade to 350 injectors, knock sensor, ESC module, and chip.
You want cheeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeep, or you want GOOD? Not at all the same thing.
You get, AT BEST, what you pay for. Pay the least, you get ..... ,,,,, you do the math.
Depends on your definition of "that much".
Is brain surgery "that much" work for a brain surgeon? Maybe, maybe not. Do you want ME rattling around inside your skull with a scalpel? Also, probably not.

Personally I find it MUCH easier (there's that elusive "much" again) to buy a stick shift car and put the motor I want in it, than to buy an auto car and swap it to stick. But that's just me.... but you gotta remember, I'm far from the sharpest knife in the drawer.
Re: Swap A 350 TPI Into A 92 Firebird
As far as cheap goes, I'd like to just get my firebird up to a stock level. If you bought 92 firebird with a 350, it came stock with TPI.
As for the stick, I was just wondering. I traded my bike for the car just to get out of the cold, and saw the car and wanted it. I would have liked stick obviously, but its not too much of a big deal. If I could swap stick in, and it wasn't outrageously expensive then I'd consider it. Then again, I'd also like to have t-tops but not really wanting to chop the top up. Either way I can still build the 350 I want, and down the road throw it in a bird or camaro with stick, and t-tops.
As for the stick, I was just wondering. I traded my bike for the car just to get out of the cold, and saw the car and wanted it. I would have liked stick obviously, but its not too much of a big deal. If I could swap stick in, and it wasn't outrageously expensive then I'd consider it. Then again, I'd also like to have t-tops but not really wanting to chop the top up. Either way I can still build the 350 I want, and down the road throw it in a bird or camaro with stick, and t-tops.
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