How Can I Make My 2.8 V-6 More Powerful

[Ortie666]

If youre handy with a TIG welder then you could easially fab up a carb flange ontop of a 3400 UIM, plug the injector holes.. get a little crafty with the dizzy and then have a really good flowing top end.

The Gen3 heads flow almost twice as much as the iron heads, if you want power that's about the only way to get it. A larger cam will only compliment the heads more.. and headers would be icing on the cake.

I would have said somthing like that, but It would be really hard to change the distributor location, and theres no way in hell its fitting in the propper hole.. so if this is actualy a consiteration Use an electromotive HPX direct ignition.. Best thing on the market for crazy fuel injection / to carb swaps

[Superdave]

i seem to remember a recent thread on someone who extended the dizzy shaft and got it to clear with some mods to the UIM...

[2.8RS]

i seem to remember a recent thread on someone who extended the dizzy shaft and got it to clear with some mods to the UIM...

I know the one that you are talkinga about. They guy who did it said something like he welded a 350 dizzy shaft onto the 2.8 dizzy's top. That cleared the LIM for the 3x00s.

For headers I would look at Edelbrock or Pacesetter if they have them.

[923.4v6]

that would be me here is the pictures it's not that hard to do and I just bought a 3500 for the heads and intakes to use on my 3.4. I was thinking about using coil packs this time but the 3500 UIM looks like it may be a little less notching for the dizzy and if it is I'll go with it again. I just started disassembling the engine tonight and tommorrow I will know for sure if it will have more room.

[Ortie666]

Thats a good idea, does it clear that last runner on a 3400, or 3500 LIM?? I remember that was my biggest problem.

[923.4v6]

Thats a good idea, does it clear that last runner on a 3400, or 3500 LIM?? I remember that was my biggest problem.

I haven't used the dizzy on a 3400,3500 it was a 3100, but I now have a 3500 I'm fixing to take the heads and intakes off to use instead of the ones I have now. I just looked at the 3500 runners and the bottom runner is offset to the inside so I don't see any problems and the 3500 UIM seems to be a better fit than the 3100 I have now. I'd say it was the dizzy cap the was hitting the LIM on you thats why I took a 350 dizzy and cut and welded it to a 3x00 oil pump drive so it would clear. My other motor was ran with the set up.

[ezrollin]

Since I feel you were looking for a simple solution here's my input. If you feel you must keep the 2.8 add a 260 cam and free flow exhaust like dynomax catback,but a 3.4 is a stonger engine and is rated 160 hp / 190 ft lbs torque,you could swap your carbed intake and a catback and not have much down time,would need a neutral balance flywheel if you used the 3.4 and could sale the 2.8 to offset cost.

[Ortie666]

I haven't used the dizzy on a 3400,3500 it was a 3100, but I now have a 3500 I'm fixing to take the heads and intakes off to use instead of the ones I have now. I just looked at the 3500 runners and the bottom runner is offset to the inside so I don't see any problems and the 3500 UIM seems to be a better fit than the 3100 I have now. I'd say it was the dizzy cap the was hitting the LIM on you thats why I took a 350 dizzy and cut and welded it to a 3x00 oil pump drive so it would clear. My other motor was ran with the set up.

Yeah.. could have been just the cap or the base that was in the way.. it was atleast a year ago when I was trying that..

[ForcedFirebird]

that would be me here is the pictures it's not that hard to do and I just bought a 3500 for the heads and intakes to use on my 3.4. I was thinking about using coil packs this time but the 3500 UIM looks like it may be a little less notching for the dizzy and if it is I'll go with it again. I just started disassembling the engine tonight and tommorrow I will know for sure if it will have more room.

That's a small port UIM. The later ('00 and up) 3x00's the port is larger and you would think that mod would impede flow.

Since you have a 3.4 already, why are you making this modification in the first place? Your ECM can run a distributor or a coil pack (ICM).

Moving a couple of wires around is a lot easier than cutting and welding - possably cutting off circulation to one cylinder...

[923.4v6]

when I first started I didn't know there was a differ. in the heads and intakes and hadn't found these sites for info. Thats why I just went and bought a 3500 engine to get the heads and intakes off of. I've been working 12 hr. shifts since I got the 3500 but the UIM looks like it may almost clear w/o much mod (but not for sure yet). I don't know anything about dis or how to reprogram a computer, I was just hoping to be able to adjust the timing for any knocks. I haven't made my mind up yet which way for sure I will go, its going in a 92 5-speed camaro.

[ForcedFirebird]

There is no re-programing, that's what I'm trying to tell you. The ECM (you should have the same '7730 ECM like me) sends a 5v signal to the ditributor to tell it to advance/retard timing. That same 5v signal is what the ICM (coil pack) uses. You can actually use the MEMCAL (chip) out of a FWD car with the same style ECM and the timing table will be alittle better for the aluminum heads.

The reluctor wheel mounted in the center of the crank is very similar to the reluctor wheel found in the base of your distributor.

I hear you on the work schedule. I have a construction company and am a partner in a CNC shop and generally work 10-14hrs a day. Have four kids (that should explain everything, lol). My engine has been sitting for the last week and a half even though I have everything but the header materials to finish.

[923.4v6]

There is no re-programing, that's what I'm trying to tell you. The ECM (you should have the same '7730 ECM like me) sends a 5v signal to the ditributor to tell it to advance/retard timing. That same 5v signal is what the ICM (coil pack) uses. You can actually use the MEMCAL (chip) out of a FWD car with the same style ECM and the timing table will be alittle better for the aluminum heads.

The reluctor wheel mounted in the center of the crank is very similar to the reluctor wheel found in the base of your distributor.

I hear you on the work schedule. I have a construction company and am a partner in a CNC shop and generally work 10-14hrs a day. Have four kids (that should explain everything, lol). My engine has been sitting for the last week and a half even though I have everything but the header materials to finish.

well I'm going to try the coil pack route I will probably have to ask you a few dumb questions during the process the first one is what would be the best thing to get my coil pack off of? there is a junk yard down the road. I have the 3500 pack will it work? It will be a week or two before I will get time to get started on it though.