joekickass

Hi,

I am a Chinese in Taiwan, it is really great to see many Firebird fan here, the US cars are not welcomed in Taiwan anymore due to the QC problem but I still love Pontiac.

I bought a 2.8 V6 few months ago, now here is a engine and tranny problem, I can not fix it myself but I have to find parts and ask my friend to fix it. My friend is like the others engineer dont know GM car well, please help me if I can swap a 3.1 or 3.4 into my car, will it be as easy as put same 2.8 into my car?? if so, I would like to order bigger V6 engine from your country and drive it everyday!!

Thank for your attention

Joe

Cronic3rd

a 3.1 from a newer (91-92 i think) firebird should bolt right in. I do not know about a 3.4. If you really need a new engine why not put a v8 in there? Crate motors are everywhere and so are parts. I mean why not have a car that is actually fast? I will gaurentee that it will blow the FWD crap you have around there outta the water.

Nixon1

A 3.4 is very swappable...and you go from 135 hp as in a 2.8 up to 160 hp in the 3.4. Quite an easy swap...and a cheap one. V8 swaps get pricey...mostly dealing with bypassing or replacing computers, etc...it gets complicated. The 2.8, 3.1, and 3.4 will all link up to a v6 700-R4 transmission from any Third Gen F-Body.

Dale

iTrader: (12)

Somewhat correction.

The 3.4l BLOCK will swap, but you will have to use the intake from your 2.8l

Same with the 3.1l unless you find the engine wiring, and ecm from a 90-92 3.1l car and make it work in yours.

Nixon1

Why would you have to use the 2.8 intake? Sure the ECM programs are different between 2.8's and 3.1's, obviously, but what does that do with the intake? Except the fact that 2.8's are MAF cars and 3.1's and I assume 3.4's are Speed Density...

Dale

iTrader: (12)

Correct, 2.8l is MAF where the 3.1/3.4l are MAP. I thought that the way the vacume lines are ran, the intakes were different for that.

Nixon1

The only differences I'm aware of is that the 3.1 utilizes a very small vacuum line out of the back of the intake for the MAP sensor.....I guess the 2.8 lacks this..but what else is so different about the manifolds?

joekickass

Thank you for you guys, I really don't know about the ECM or intake, but you can tell me what parts should I prepare, so I will not meet the problem, Thank you

Dale

iTrader: (12)

Ok, your best bet is to purchase a used 3.4l engine from a 93-95 camaro/firebird.

Then you mix and match the parts.

quick overview of which parts to use...........

From current engine (2.8L)
Intake, fuel rail, Thorttle Body, timing chain cover, water pump, valve covers, distributor, oil pan, all accesorys (alt, power steering, ac).

From "new" engine (3.4L)
Block, heads, cam, crank, pistons, connecting rods, pushrods, fuel injectors.

While doing the swap, install new timing chain, and rear main seal.

Also, what year is your car?? You may have to get a new flywheel. Is it automatic, or manual??

joekickass

It is really great to receive your reply. My firebird is 1987 V6 with auto transmission. How about the computer and auto transmission? What should I use?

Dale

iTrader: (12)

Ok, with the parts swap that I mentioned, you will use same computer, and same transmission.

Being an 87, you will need a new flywheel/flexplate from 88-92 2.8/3.1l auto engine car.

Reason for this is that 87 and earlier, the flywheel was balanced via the flywheel/flexplate. 88 and later was balanced on the crankshaft.