I've heard it before, "don't build a 2.8".

[Helgaiden]

cool thanks

[geoffinbc]

I was only talking about the OIL Pump. The aluminum bodies oil pump found on 2.8L's is junk. Always use the later model iron pump which first showed up in 1990 on the 3.1L's

The water pump from any engine is good. If you are doing a swap in an S-10 you need to keep the S-10 pump in order to support the cooling fan.

[Helgaiden]

i guess what i meant was is keeping one pump on there better than transferring over one of the pump's from the 2.8? Like...if there are any accesories on the 3.4 that i should keep on there because of superior design instead of swapping over an inferior designed part from the 2.8? Or does it really even matter?

[blowns10]

Helgaiden, yes everything transfers over, no need to worry. All of the accessories that were on your 2.8 (ignition, water pump, exhaust) all fit the 3.4 no probs.

Bouncer88, yeah, they are basically the same (60 degree layout) however, the 2.8 is throttle body injection, whereas the 3.4 is multipoint fuel injection. Late.

[Helgaiden]

iron pump from a 3.4? What does this mean in a situation like mine where a 2.8 is being swapped out for a 3.4? I was under the impression all accessories and pumps transfer over...but does this mean now i should keep water pump on the 3.4? (assuming an electric fan conversion is doen as well right?)

sorry to if this is taking this off topic

[Bouncer88]

I am now honestly contemplating doing a 3.4 build, didn't realize they were pretty much the same except for the injection system.

[blowns10]

So, what are your plans?. Made any decisions, or still thinking about it?. Late.

[dusterbd13]

oh, and youll need to burn a new program for the ECM to make it all work right.

[dusterbd13]

hedmans are worth it.

port and polish the heads and intake. worth it.

4.3 with matching TBI intake boring and 2.8 injectors: worth it. port the TBI as well.

iron pump from the 3.4

add a crank scraper or windage tray

electric fan

good flowing air cleaner and exhaust

underdrive pullies

[geoffinbc]

DON'T use your stock pump again. All the aluminum pumps are junk. Use a cast iron pump from a 3.4L with a 3/4" pickup.

Port matching goes a long way in improving performance of the iron heads and intake. You will see for yourself when you go to match the ports to the intake how far off they are and how much work needs to be done to really help them out.

If your thinking of a cam just buy a Comp Cams K kit. Its got all the parts you need for the whole job there is no point in looking any further. The cams are the best and so are the lifters and they include all the parts you need like springs, retainers and locks plus more. If you want rockers the magnum roller tips cannot be beat at under $150 for a set.

My site has a whole list of part numbers for the work I did in my Trooper which is identical to what you are doing in your S-10.

[Mad Max]

Uh, maybe I missed something here, like why should you build a POS 2.8 when there is so much better out there? I guess I am remiss at offering something way better than is currently in this vehicle. Excuse me for suggesting something that is an improvement. Isn't what this site is all about?

You didn't read the title or ??
He's looking to improve what he has,and had some pretty specific questions.
None of them included "give me reasons not to do this or why you think I shouldn't".

[geldartb]

nice that sounds good. im in Leicester alot and my car along with most of my stuff stays in Leicester.

[Bouncer88]

nice truck. sounds like a nice project you got going.
where about in mass are you im right in the middle

We will have to meet up some time, I am in Oxford, not to far from you.

[geldartb]

nice truck. sounds like a nice project you got going.
where about in mass are you im right in the middle

[Bouncer88]

Just curious, what type of CR am I looking at with the 3.1 crank , stock rods, and forged flat top pistons?