is 3.1L its "max" or is it possible to safly and effectivly bore it out more? what would it be? like a 3.7? that was just a guess, so dont jump on me how much more, conseratvily so i dont f 'up mah engine. not easy to replace a daily driver on minimum wage

 

probably 3.2. maybe 3.3 but probably not. safely that is. you probably could go to 3.4(contrary to popular belief) but it would be extremely dangerous as the walls would be VERY thin .
with a 3.4 block you can go to about 3.5 , that's it. ugg,i dunno, i'm tired.zzzzzzzz

[This message has been edited by CaliCamaroRS (edited April 09, 2001).]

 

Hey Dan,
Wake up
You got a tranny to finish!

------------------
Chat Soon,
KED85
Karl
1985 Firebird 2.8 to 3.4 swap project for Smog Happy LA, CA

 

I don't think you could bore a 3.1 out too much. I think the 3.1 liter 60-degree V6 was in fact a "bored-out" 2.8 liter.

Increasing the stroke could also increase displacement. In either case, I would guess that the max you could safely go would be maybe 3.4 liters.

Wasn't the 3.4 liter V6 in the '93+ F-bodies a "stroked" 3.1 liter?

Anybody else???

------------------
'89 GTA: blk on blk with 5.7 liter, T-tops, leather, N10 dual exh with 76,500 original miles. 100% stock including the ZR50 Goodyear "gatorback" tires.

 

A 3.1L is a stroked 2.8L.
A 3.4L is a bored 3.1L.

3.1 stroker kits were/are available for 2.8s, search the board for the URL if you are interested.

Dale

------------------
The Bird
1986 FireBird
2.8L MPFI
Gutted Cat, No muffler (Sweet Sound)
Was 700-R4 --> Now T5

 

so i could get one of those kits and get an engine shop or w/e to safely bore out mine .3 more? sweet...

thx guys!

 

OK, let's see if I understand this. A 3.4 is basically a bored and stroked 2.8? OK, once I get my hands on the stroker kit, how much am I going to overbore the cylinders? (.030", .060", .090") What crank is used in the stroker kit?

------------------
'86 Camaro SC 2.8 V6, 5spd
Bone Stock, I like to think of it as a blank canvas

3

[This message has been edited by BadBowTie (edited April 10, 2001).]

 

Well...

The bore of a 2.8L is 89mm(3.503937008 in.) and the bore of a 3.4L is 92mm(3.622047244 in.).

Add a little math and Viola

Enjoy
Dale

 

I've seen some guy selling bored & stroked 3.4s on ebay.
Go to the wrecking yard and go get one.
For prices I've been told ($400 - my $800 engine) why waste the effort for this magic item you are trying to create.
Just go get it already done, slam it and & go.
You CANNOT recreate the 3.4 for the low cost of the running used engine from the yard.

Shop for parts costs
Shop for machinst cost
Then go shop the yards.

You'll find out which option wins, hands down!
My machinist would not have charged me hardly a penny except for the parts.
I didn't want to waste his time or mine.
I'd rather have spent the correct & right effort to get my Firebird back on the road, economical & efficently.
For $800 & the gaskets, my own cheap free labor effort (and I sold the left over parts for $105)..
do this math.
Don't waste your time on boring & stroking this little engine.


------------------
Chat Soon,
KED85
Karl
1985 Firebird 2.8 to 3.4 swap project for Smog Happy LA, CA

 

For the record, I am not saying the boring/stroking is a good plan. WAY too much work. 3.4 swap is far less work and money and will work better in the end.

Dale

 

ive never run a car up a jack ramp for any reason besides the ramp you put your nicer cars on for customers to see..and your telling me to drop in a new motor!

 

I was just curious as to what had to be done to the 2.8 to create a 3.4. While I was scoping the Scoggins-Dickey Parts Center site I saw a GMPP 3.4HT crate motor, complete, minus intake and ignition, for a a little over $1700. It's listed as an S-10/S-15 swap but I don't see why it wouldn't fit in an F-body.

------------------
'86 Camaro SC 2.8 V6, 5spd
Bone Stock, I like to think of it as a blank canvas

3