*URGENT* 350 GTA into my 305 TPI car...
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Senior Member
Joined: Oct 2006
Posts: 512
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From: PA
Car: '92 Camaro Z28
Engine: 305 TPI
Transmission: Built 700R4
Axle/Gears: Unknown 9 Bolt Posi, 3.73s
*URGENT* 350 GTA into my 305 TPI car...
It is possible that I can get my cousins 99xxx mile 350 TPI from here GTA...
I have a 305 TPI in my 92 Z28, would the swap be a lot of work?!?!?!
What is a resonable price for the 350, right now it runs strong in her GTA...
My little cousin though 700 would be a good price...
So anybodies help could be appreciated now, while I'm still talking to her.
Its not like a I don't talk to her... its just she has like 3 other buyers right now...
I have a 305 TPI in my 92 Z28, would the swap be a lot of work?!?!?!
What is a resonable price for the 350, right now it runs strong in her GTA...
My little cousin though 700 would be a good price...
So anybodies help could be appreciated now, while I'm still talking to her.
Its not like a I don't talk to her... its just she has like 3 other buyers right now...
Last edited by Z2EIGHT; Jan 6, 2007 at 10:00 PM.
Member



Joined: Nov 2002
Posts: 474
Likes: 15
From: Washington State
Car: '84 Berlinetta
Engine: ZZ4
Transmission: BTOD stage 3
Axle/Gears: 3.23 posi disc
Does the intake look similar? Chances are (I could be wrong) the only difference between the 350 TPI and the 305 TPI was the PROM chip and possable differences in the intake (trottle body dia., injectors, ect.). It will bolt right up to (as well as the wiring) your camaro.
Junior Member
Joined: Dec 2006
Posts: 77
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From: Qc,Montreal
Car: 1987 GTA
Engine: High reving 332ci monster
Transmission: T-5
Axle/Gears: 3.73 posi
what year is the trans am? because if its a 89 or earlyer your going to need the wire harness and ecm aswell to drop the 350 in your camaro
Regards
Skoda
Regards
Skoda
Joined: Jul 2006
Posts: 686
Likes: 2
From: Davisburg, MI
Car: 87 Evoluzione, 84 TransAm, 05 GTO
Engine: LT1, L98, LS2
Transmission: (2) T56 & (1) 700R4
Axle/Gears: Moser 12-bolt w/3.73 & Stock
Can't he still use all the hardware from the 350 and just get a 350 chip for his ECM?
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Junior Member
Joined: Dec 2006
Posts: 77
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From: Qc,Montreal
Car: 1987 GTA
Engine: High reving 332ci monster
Transmission: T-5
Axle/Gears: 3.73 posi
sry z2eight i'am not going to reccomend any thing further in tell I can figure out myself if the map's wire harness is compatible with the drop in 350 maf system
Regards I'll keep you posted
Skoda
Regards I'll keep you posted
Skoda
Junior Member
Joined: Dec 2006
Posts: 77
Likes: 0
From: Qc,Montreal
Car: 1987 GTA
Engine: High reving 332ci monster
Transmission: T-5
Axle/Gears: 3.73 posi
Hey z2eight
The link below will set you in the right direction you'll need to know on what is needed in swapping from maf to map or map to maf
http://tpiparts.net/installing_tpi_on_your_vehicle
Regards
Skoda
The link below will set you in the right direction you'll need to know on what is needed in swapping from maf to map or map to maf
http://tpiparts.net/installing_tpi_on_your_vehicle
Regards
Skoda
Member
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Joined: Oct 2006
Posts: 177
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Car: 1987 IROC-Z Z28 Convertible
Engine: LB9
Transmission: 700R4
Axle/Gears: 3.23
305 LG4 > 350 TPI
Although I did not do the work, my 1987 IROC has a 1989 TA 350 TPI in it. The prev owner did an entire swap (harness & powertrain) and he told me it was not a huge issue, but had to "pin-match" the IPs on the IROC. Also, even to this day, the headlight wiring has been a problem since the TA has 1/side, the camaro 2/side. the light harness swap is not straightforward.
Joined: Jul 2006
Posts: 686
Likes: 2
From: Davisburg, MI
Car: 87 Evoluzione, 84 TransAm, 05 GTO
Engine: LT1, L98, LS2
Transmission: (2) T56 & (1) 700R4
Axle/Gears: Moser 12-bolt w/3.73 & Stock
Hey z2eight
The link below will set you in the right direction you'll need to know on what is needed in swapping from maf to map or map to maf
http://tpiparts.net/installing_tpi_on_your_vehicle
Regards
Skoda
The link below will set you in the right direction you'll need to know on what is needed in swapping from maf to map or map to maf
http://tpiparts.net/installing_tpi_on_your_vehicle
Regards
Skoda
Even if the 350 is MAF, my understanding is he can run it MAP with the old harness and ECM. For that matter, stick the 350 long block under the 305 intake. Swap the injectors and get a 350 chip for his ECM.
Thread Starter
Senior Member
Joined: Oct 2006
Posts: 512
Likes: 0
From: PA
Car: '92 Camaro Z28
Engine: 305 TPI
Transmission: Built 700R4
Axle/Gears: Unknown 9 Bolt Posi, 3.73s
Well,
I thought it would of been a more straight forward swap... just need a 350 computer and bingo...
Besides the engine... how much in extra parts are we talking about?
I thought it would of been a more straight forward swap... just need a 350 computer and bingo...
Besides the engine... how much in extra parts are we talking about?
Joined: Jul 2006
Posts: 686
Likes: 2
From: Davisburg, MI
Car: 87 Evoluzione, 84 TransAm, 05 GTO
Engine: LT1, L98, LS2
Transmission: (2) T56 & (1) 700R4
Axle/Gears: Moser 12-bolt w/3.73 & Stock
In theory all you need is a 1992 350 chip to replace your 305 chip inside the ECM. Everything else can come from your car or the 350.
Thread Starter
Senior Member
Joined: Oct 2006
Posts: 512
Likes: 0
From: PA
Car: '92 Camaro Z28
Engine: 305 TPI
Transmission: Built 700R4
Axle/Gears: Unknown 9 Bolt Posi, 3.73s
Cool , where can you find 350 chips?!?!
I can't take to much from her car, she is still going to use it...
I can't take to much from her car, she is still going to use it...
Joined: Jul 2006
Posts: 686
Likes: 2
From: Davisburg, MI
Car: 87 Evoluzione, 84 TransAm, 05 GTO
Engine: LT1, L98, LS2
Transmission: (2) T56 & (1) 700R4
Axle/Gears: Moser 12-bolt w/3.73 & Stock
Lots of places. Do a search for TPI PROM. TPIParts.net Skoda mentioned has 'em for $75.
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iTrader: (16)
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Posts: 2,006
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From: Tiffin OHIO
Car: 1987 Iroc-z Convertible
if you are taking the motor just take the ecm too. keep your map setup and swap injectors like was mentioned earlier. If you need any help just pm me I have done probably 3 dozen swaps so no big deal.
Joined: Jul 2006
Posts: 686
Likes: 2
From: Davisburg, MI
Car: 87 Evoluzione, 84 TransAm, 05 GTO
Engine: LT1, L98, LS2
Transmission: (2) T56 & (1) 700R4
Axle/Gears: Moser 12-bolt w/3.73 & Stock
The discussion has been revolving around not knowing what the 350 is. There are Mass Air Flow versions that use a heated wire to measure how much air is entering the motor versus Manifold Absolute Pressure (speed density) that relay on assumptions and look-up tables in lieu physically measuring how much air is entering the motor.
Thread Starter
Senior Member
Joined: Oct 2006
Posts: 512
Likes: 0
From: PA
Car: '92 Camaro Z28
Engine: 305 TPI
Transmission: Built 700R4
Axle/Gears: Unknown 9 Bolt Posi, 3.73s
She has the same intake as mine if that matters...
Okay this dones't sound so bad....
Uh.. Do I need her wiring harness or not? and what kind of injectors do I need and why...
Okay this dones't sound so bad....
Uh.. Do I need her wiring harness or not? and what kind of injectors do I need and why...
Last edited by Z2EIGHT; Jan 10, 2007 at 06:16 PM.
Joined: Jul 2006
Posts: 686
Likes: 2
From: Davisburg, MI
Car: 87 Evoluzione, 84 TransAm, 05 GTO
Engine: LT1, L98, LS2
Transmission: (2) T56 & (1) 700R4
Axle/Gears: Moser 12-bolt w/3.73 & Stock
No you don't need her harness. You do need the larger injectors from the 350. The off the shelf factory PROM for a 350 assumes they are a specific size (22lb/hr?). If you use the smaller 305 injectors (19lb/hr?) your engine won't get enough gas.
If her intake has all the same sensors and connections as yours the swap gets really easy.
If her intake has all the same sensors and connections as yours the swap gets really easy.
Thread Starter
Senior Member
Joined: Oct 2006
Posts: 512
Likes: 0
From: PA
Car: '92 Camaro Z28
Engine: 305 TPI
Transmission: Built 700R4
Axle/Gears: Unknown 9 Bolt Posi, 3.73s
Okay,
350 from an 88 GTA
22# Injectors, specific brand?
90-92 350 TPI PROM
Anything else?
Wait... doesn't her engine have the injectors...I can only find 21# and 24# injectors... where's her injectors?!
350 from an 88 GTA
22# Injectors, specific brand?
90-92 350 TPI PROM
Anything else?

Wait... doesn't her engine have the injectors...I can only find 21# and 24# injectors... where's her injectors?!
Last edited by Z2EIGHT; Jan 10, 2007 at 09:29 PM. Reason: Because I'm a noob!
Joined: Mar 2000
Posts: 43,187
Likes: 43
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
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Aug 12, 2015 03:41 PM





your right he could do that, like the aproch to (KISS)
