drtybrd

Has anyone tried one of the 2.8 stroker kits. I was looking on-line and found Anderson Racing Industries who makes kits that stroke the 2.8 to either a 3.1 or a 3.4. It doesn't look like the kits are that much more expensive then a rebuild kit. I'm torn between swapping to an 8 or rebuilding the 6 mainly a choice between power or money.

AntiVTEC

Where'd u find the kit from? Web site? lemme know!! I'd say (since were on the v6 board anyway) rebuild that v6! How much of an embarrasment would it be for an 8 to lose to a 6? hehe.. payce.

------------------
85 2.8L Sport Coupe 5-speed.
Mods: Hpertech chip and powerstat, MSD 6A-L, Crane fireball coil, Dynomax hi-flow cat and catback system with a dynomax magnum race bullet muffler on the i-pipe, K&N filterchargers, Eibach and Tokiko springs/shocks setup, Global west sub frames, Suspension techniqs front and rear sway bars, and good ole 88 IROC wheels with Kumo Ecstas on em!
"I'm out to seek those pesky VTEC boys!" (don't get me wrong, I'm asian myself! hehe)

Wins: 2000 V6 Accord, 69 302 Mustang, 2000 Auto VR6 Jetta, 89 Toyota MR2, 90 Civic Si, 76 350 Camaro.

drtybrd

Here is how I found the page, go to www.ask.com and type in 2.8 stroker, the company name says ARI. They have a web address but I don't have it yet.

Brian K

I plan to eventually drop a small blcok 400 in my car, but that is about 5 years off because of cost and stuff, but within a year or two I plan to bore and stroke my old 2.8 and use a little NO2 to help it play.... Who knows I may keep the 6 and just buy a old 84 vette like I want to get my V8 fix.

FBODY-ADDICT

Enjoy www.engine-parts.com/gm28stroker.html

KED85

I've seen these guys on ebay, alot.
Anyone here purchase a block from them?

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

Camaro_hunter_d

hell these guys are right next door too me..I am in illinois so I may just have them do the porting to my heads...I wonder if they have something a little better for the 3.1. I know the 2.8 and 3.1 aerre the same block but different bores...

x55Cam

JMO, but if your going to go thru all the trouble of stroking the 2.8 you might as well replace the block and internals with a 3.4. There's no such monster as a 3.4 stroker kit nor can you squeeze out 3.4 from a 2.8 block. The bore size won't support it. A 3.1 is a stroked 2.8. A 3.4 is an entirely unique block design with a larger bore and a 3.1 crank.

mulot30th

I always though the 2.8/3.1/3.4 had de same block!

------------------
1999 30th anniv. TransAm #877
** BESTS:60ft=1.935 1/4 ET=13.08 MPH=111.8 ** (Only 3.5K miles)
T-TOP,6M-Hurst,12cd, TCS
!EGR * !MAF Screen * ported and polished MAF * !silencer baffles * ! lid baffles * ported and polished TB * removed primary and secundary baffles * sealed ram-air * 9.4k timing-tricker * !CAGS * Mobil 1 * Lou's short stick * BMR panhard rod * BMR poly/poly LCAs * !DRL * Polished SLP resonator catback * 2 Ractive mufflers * 3x3 'fernco' mod * K&N * TB stop grind * Grotyohann headers * offroad Y-pipe* Power pedals * 19+ coats Zaino * WHITE gauges cluster * blue door TA badges * pontiac windshield decal * Polished momo shift **** * 4.5" brosal exhaust tips * Kenny Brown DD SFC
Ordered:
Polished: Calipers * Hood struts * Air tubes * Valve covers,Heat shields , etc.
Later:Cam + spring + pushrods swap + stage II heads
2000 Black Z-71 K1500 5.3l
ext.cab * !intake baffle * !MAF screen * !EGR mod

KED85

Same engine design.
Totally different block, IN THE SENSE THAT,
the 2.8/3.1 is the max overbore one can do a safe.
Which is why I went to a 3.4 swap. I got the best, largest of the 60* V-6 series, from the get go.
FIND OUT HOW THEY STATE THEIR CLAIM OF THE 3.4 from a 2.8, please CHD!

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

Ovrclck350

What can a 3.4 be stroked to?

drtybrd

The company doesn't sell just a kit for 2.8/3.4 but they say they are working on it. However it says that you can use the 2.8 heads, and that it is a 2.8 block you buy with the 3.4 conversoin done already. You can get there 3.4 kit for $975, and I think the 3.1 kit is only like $475.

FBODY-ADDICT

Yeah that's the 3.4 shortblock for 975, if you notice they state this engine has been known to make 180 hp with the right camshaft and fuel intake, so I'm pretty sure it wouldn't pull 180 ponies with the stock 2.8 heads and camshaft. I actually thought about getting the stroker 3.1 kit but then I realized that 160 hp is what the used 3.4 would give me anyway, plus I have the better flowing 3.4 heads and more room to upgrade( cam, intake, porting and polishing, rockers, springs.....nitrous???...nah!! leave the N2O out of this)

FBODY-ADDICT

Check this info out on stroking the 3.4 overclk http://members.aol.com/_ht_a/gpxss/index2.html

Go to the rebuild section

[This message has been edited by FBODY-ADDICT (edited June 01, 2001).]

x55Cam

I really would like to see this 'kit' that takes a 2.8 block and makes it a 3.4. Do they have a website? It's very easy to tell a 2.8/3.1 block from a 3.4 in that the 3.4 will have a casted stamp '3.4' on the side of the block not to mentioned a ribbing design that strengthens and reinforces its outer walls. If they make a kit that strokes a 3.4 thats a different story. But boring out a 2.8 in addition to stroking it to a 3.4 is risky.

x55Cam

Read it more carefully. It makes no mention of 'stroking' the motor other than it's stock spec. Only boring limititions for each block. To stroke the motor, it would require a customized crank/and or rods which is a VERY expensive option at this point since their are no companies that make such a kit, up til now anyway.

KED85

2.8 & 3.1 cam profiles are the same.
Really
2.8 & 3.1 heads are the same.
Really

When I did my 3.4 swap, I DID NOT SEE ANY STAMPING THAT SAID 3.4
I SAW NONE.
Extra ribbing, yep, saw that, tho.
My engine is a 1995, last year of the series.

The 3.4 is the best of the best from the factory. The cam & head specs are the final dance development of this V-6 60* series.
From all that I heard, before I did my swap, 2.8/3.1.
Then the 3.4.
Always separate.
How they claim their 3.4 from a 2.8 & at $1K,
I paid $800 for my 3.4 & sold left over stuff for over $100.
I know of several others that have paid alot less!

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

x55Cam

Currently my block is at the machine shop for rework, so I don't have access to it at this moment but when I get the chance, will provide a photo where the casting is. It's deffinately there.

Also, at some point in time, though I have to do more research on this, the 3.4 heads weree updated to contain larger intake valves, but I'm not sure if they ever were released as standard equipment. The cast iron heads of all these motors were basically the same otherwise.

Camaro_hunter_d

uhh the 3.1 is not a bored over 2.8. You can bore the 3.1 to the cubes of a 3.4 though.
How stroker kits work is pushing the cubes up. The crank can move more allowing it to push more flow into the chambers. The 2.8/3.1/3.4 are the same block just defferent bores... The 3.1 crank can go into the 2.8 and boost the cubes a little, the same goes for the 3.4 to the 3.1. But to get the full cube boost you need to bore it out though. You can get 3.4 cubes from a 3.1 block with the crank and a little boring. the 3.1 can go 60 over nicely with no danger. I have the website where it lists the limits of the 2.8/3.1/3.4 engines I will look and see wat the max bores can be. Though keep in mind that you have to specia order the rings per size if you want high quality ones...


well it looks like they can all go 60 over safely and even push 70-80... on the 3.1 it goes to a 3.45 the 2.8 goes to 3.3 the 3.4 goes to 3.6..

[This message has been edited by Camaro_hunter_d (edited June 01, 2001).]

KED85

At what cost?
Again, from what I was told, the 3.4 block is "different".
That's the only response I can offer, as I also read this in the GM performance book, 1998 edition.
The 3.4 heads are different, than the 2.8 & 3.1. The FI 2.8 heads have largers Valves, better flow than my 2.8 S-10 Blazer Carb'd heads, too.
The 2.8/3.1 cam is the same too.

When I had MY 3.4 block out, no marking that states it's a 3.4, on the side.
None.
NOW, there are casting codes & such.
Know where?
There is a verticle pillar, behind, where the bellhousing goes.
It's covered.
Have to remove the tranny.

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

x55Cam

Well no flame intended but I have to disagree with you there. I am currently putting together a web site that gives some info in to the history of the v6/60 motor. This info was put together based on facts taken from various manuals and books. None of this info is opinionated except only where "I" state. Since I have seen a 3.4L and a 2.8L side by side, you can very well tell them apart.

http://users.spec.net/home/emxjc/block.html

Here is a section that gives the history of the v6:

http://users.spec.net/home/emxjc/v6_60_history.html

As far as boring out the stroked 2.8(3.1) to 3.4 it may be possible but IMO, I don't think a machinest would warranty his work doing such a risky process, especially if you intend to use forced induction.

pletch

somebody make up their mind i last time a checked a 2.8 block, and a 3.1 block were the same pistone and crank give or take but basicaly the same shell, just one fat one not. However, for three years chevy made a 3.4 in camaros that was totaly diffrent, same crank as the 3.1 but diffrent head and intake configs. as well journal bearings. makeing it unique

Six_Shooter

iTrader: (2)

Holy old thread batman, and yet more mis-information.

The carnk journals from 1985 1/2+ are all teh same up to the 3500, introduced a couple years ago.

2.8 and 3.1 share the same bore, 3.1 and 3.4 share the same crank. This is easy.

the 3.4 uses the same heads as the 3.1 and later 2.8s

The 3.4 is a block unto itself however, due to the 92mm bore, as opposed to the 89mm bore of the 2.8/3.1.

pletch

like i said last time i checked here on this site, thats what i was told, the journals are diffrent, but ive been corrected, i was just more trying to make a point saying, i'm no where near the expert on v6er yet, hope to be some day, but this tread was driving me crazy going back and forth, can somebody put it out strait witch six i think you did

69charger383

I got the basic 2.8 to 3.1 kit with .040 over pistons for sale.. make me an offer.. comes with all new bearings, rods, crank and a neutrally balanced flexplate for the 700R4..