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Engine Swap Everything about swapping an engine into your Third Gen.....be it V6, V8, LTX/LSX, crate engine, etc. Pictures, questions, answers, and work logs.

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Old 03-12-2009, 07:27 PM   #1
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v6 to v8 swap fuel pump.

i just purchesed this car around 2 weeks ago it did not run. it has been sittin for around 3 years. but it ran when it was parked. it had a 2.8 v6 in it which was fi i beleave. but when i got it it has a 350 in it. i replaced plugs and wires and battery. it will only run if i put fuel in the carb. i blew the fuel lines out. so i think it is the fuel pump because it aint even turning on. the fuel line has a regulater near the carb on it to settle the pressure. so i beleave the fuel pump is still in the tank. i am needing the fuel pump. so i just need to replace the fuel pump for a v6 or v8? which pump would i need.
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Old 03-13-2009, 08:27 PM   #2
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Car: '84 Trans Am WS6
Engine: LQ9 w/ Wegner LS6 heads
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Re: v6 to v8 swap fuel pump.

Back in '87, all the carbureted V8 camaros had a low-pressure pump in the tank, feeding an inadequate mechanical pump on the engine block, and that fed the carb directly. Not a bad way to go. The TBI pump in the tank will support over 310 horses (at the crank, not at the rear wheels), but you don't have to do all that. Just put a new pump in the tank, and keep using your regulator. ask for the pump for an '88-'92 Camaro RS with the TBI 5.0L, called the LO3, vin code E. Also get a new strainer sock for it. Some on here will tell you to just cut a hole in your trunk to access the pump, but I've done that, and it really is way better to drop the tank. Also, if you can get a tank from a '92, those were all baffled like the 1LE.
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Old 03-13-2009, 08:58 PM   #3
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Car: 82 Berlinetta(2)/57 Bel Air
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You might as well get a TPI pump while you're at it. They all mount exactly the same. More flow capacity, and the regulator will keep the pressure at 4-7 psi just fine.

Speaking of the regulator, it has to be a return-style regulator or it will burn out the pump. If this regulator does not have a return line on it, get one that does (like the Mallory 4309) before you power up the replacement pump.

That is assuming the current pump is getting power. You might want to determine that before you go to the trouble of dropping the tank. It's a real downer to replace an expensive and difficult to replace part, only to find out when you're done that the real problem was with something else.
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Old 03-13-2009, 09:13 PM   #4
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Car: 81z-28,89gta,91z-28 03 1500
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Re: v6 to v8 swap fuel pump.

yeah sethorama,like five7kid said,find out what you have goin' on first and if you have a fuel pump for a 2.8 multi port eng.(not carbed or tbi) its the same as a tpi 305 or 350 fuel pump.If so,get the correct reg. for the higher pressure.
Don't make the same mistake this guy did.http://www.thirdgen.org/techboard/co...my-yellow.html (Life and Death of My Yellow Beast)
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Old 03-14-2009, 04:15 AM   #5
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Re: v6 to v8 swap fuel pump.

thanks for all the info. i found out the fuel pump is the stock v6 fuel pump. i am looking to order a new one now. and the regulator is for the v8. i had it all checked. so what would be the easiest just replaced the pump with the v6 pump or just get a tpi pump or what?
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Old 03-14-2009, 11:01 AM   #6
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Car: 82 Berlinetta(2)/57 Bel Air
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It's exactly the same amount of work. The pumps mount in the same place and look the same. It's the internals that are different.

"V8 regulator"? I'm not buying it. Most likely it's a $20 dead-head regulator. If so, that's what killed the pump (if indeed the pump is dead - have you verified it's getting power?).
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Old 03-14-2009, 11:01 AM
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