S10 Hop-Up

shmonty · 03-06-2008, 01:45 AM

Hello there. I have a 1993 S10 2wd 5spd with a 2.8L TBI. My question is how
or what can I do to get more power out of my engine? I really don't want to
swap engines. I know the basics of cold air, exhaust, ignition upgrades and
pcm chips. I am mechanically inclined so I won't be scared away easily. I greatly appreciate any info I can get.

Thanx

G-U-NOT · 03-06-2008, 04:20 AM

All that stuff you just mention that you know about... thats pretty much all your looking at with that engine!!
If you want to get more power, you're going to need to port & polished the heads, maybe even have them milled down to bump the compression up a tad.
You can also get a performance cam too!
Your truck probably has 3.42 gears in it... step it up to some 3.73 posi gears or maybe even a steeper set!!
Do all that stuff to your truck, THEN tune the pcm for all the mods!!
I have a 93 s15 Jimmy with a 4.3L Vortec engine in it and Im working on some mods as well and Im going with 4.56 gears because Im putting 31s on it!!... let me know how it goes!!

ezrollin · 03-08-2008, 12:16 AM

If you want any noticeable gains swap do a 4.3 tbi w/2.8 injs. a 260 cam and free flow exhaust. You will need to bore your intake tb bores and you might check the 272 cam.

G-U-NOT · 03-08-2008, 12:33 AM

He doesnt wanna do a motor swap, thats the thing...
Besides, the 4.3 TBI is junk!
If you're going to go with a 90* engine, might as well get a 4.3 Vortec with a 700R4 trans!

Canyonero · 03-08-2008, 03:34 AM

http://www.4x4wire.com/tech/60degreeV6/index.htm

ezrollin · 03-09-2008, 07:08 PM

Quote:

Originally Posted by G-U-NOT

He doesnt wanna do a motor swap, thats the thing...
Besides, the 4.3 TBI is junk!
If you're going to go with a 90* engine, might as well get a 4.3 Vortec with a 700R4 trans!

No,you misundestood,I meant to bore the throttle bores on his manifold and install the 4.3 tbi unit with 2.8 injs;it's like putting on a bigger carb,with cam and freeflow it will wake up your 2.8 !

shmonty · 03-11-2008, 02:53 AM

By the way. I live in California so smog will be an issue. If I use the 4.3 tbi , do I have to change computers or will the 2.8 pcm work fine?

Canyonero · 03-11-2008, 03:21 AM

The 2.8L ECU will work fine. You'll be keeping the injectors from the 2.8L, the larger throttle bores on the 4.3L throttle body simply allow better air flow.

betterthanyou has a nice write-up on this: http://members.shaw.ca/betterthanyou...3tb/28to43.htm

jwvess00 · 03-22-2008, 12:13 AM

Hi there!

The fastest path to power in a 2.8V6 S-10 is a 3.4V6, either as the crate engine from GM or as a donor engine from a F-body. It is a bolt-in swap.

The 4.3 TBI is a great swap. It makes a noticeable difference. You're looking for a 4.3 TBI that has the throttle cable bracket bolted to the TBI -- the older ones don't, and there isn't enough meat on those to drill/tap the TBI for the 2.8's throttle cable bracket. You'll also have to remove the 4.3's throttle lever (it's platted/spotted on, so this means a die grinder or similar to cut it off of the shaft -- do NOT cut the shaft!) and install one from a 2.8 TBI (or one that matches) on it. and weld it in place (30 seconds or less with a MIG).

If that sounds like too much work, the 2.8V6 Holley TBI has the same throttle bore size and bolts on with not cutting/welding (though boring the intake is recommended). I have one that I don't need and am willing to sell, but it needs an injector cleaning after sitting for two years.

Canyonero · 03-22-2008, 01:31 AM

Quote:

Originally Posted by jwvess00

If that sounds like too much work, the 2.8V6 Holley TBI has the same throttle bore size and bolts on with not cutting/welding (though boring the intake is recommended).

Doesn't not boring the intake to match the larger throttle bores defeat the purpose of installing a larger throttle body?

Tell me about this Holley you have. I know people who may be interested.