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Old 01-04-2004, 03:15 PM
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86 s-10 with a 2.8L power?...not!!!

Hello, I have a 2.8 in my 86 s-10 is there anything I can do to improve power at all that wont hurt mileage or did I really screw up buying and installing a new crate 2.8 for it. Just how weak are these motors? Do they blow up after 100,000 miles or will they last as long as I drive it like grandpa

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Old 01-04-2004, 03:22 PM
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I have a 2.8 in my 4X4 83 Blazer with 227,000km on it. It runs fine, but as you say, its a real "DAWG". they are a decent little motor, but a really underpowered. I advanced the timing to 12 degrees which helped the power and mileage a little. I mean "real little".

You are not going to get much power out of this thing. Drive it until it "calfs" and then slide in a small block. and turbo trans.
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Old 01-04-2004, 03:22 PM
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first of all, you wont get more power without pumping more fuel... and thus hurting mileage.. about the only thing you could do that wont affect power when you do not mash the pedal is to install a turbocharger. it wont affect your mileage much when you cruise along at part throttle and hence no boost. but when you spool up the turbo you will have the added power about 100% increase per 15 pounds of boost. but at the expense of mileage..

a 2.8 should be good up to 250-300 hp if it isn't abused on a regular basis, and in short intervals (so no high speed cruising)
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Old 01-04-2004, 03:23 PM
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NOT!!!! Sorry Those 2.8`s are one of the worst motors ever made,they had too many problems.
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Old 01-04-2004, 03:47 PM
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Nothing wrathy, or death will follow.

I'd have to agree with Dradee.
The 2.8 is a pile. Flawed engineering produces poor oiling on #4 rodmain. If you got 100k, you did good, or drove slow. If you overheat one, just figure on buying AT LEAST one head. If that goes too long, figure on buying pistons.
My 86 Camaro was afficted with all these issues, although, I thought it ran o.k. for what it was, and made good mileage.
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Old 01-04-2004, 04:28 PM
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Swap in a 3.4 from a late model camaro.
http://forums.s-series.org/viewtopic.php?t=52
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Old 01-04-2004, 04:44 PM
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why not go 4.3 they have balls
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Old 01-04-2004, 04:46 PM
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99% of all motors run fine for well over 100k if you change the oil properly and take care of it. These problems are overstated, you're fine. Put a K&N filter on it. Edelbrock also makes an intake and cam kit for it. Toss that on it if you want some more juice.

Just drive it and don't worry about the motor.

K
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Old 01-04-2004, 05:56 PM
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i agree if maintained they're fine they suck but they usually last i wouldnt worry about power. as for a bigger motor i know a small block fits in without too much trouble.
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Old 01-04-2004, 08:24 PM
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http://www.60degreev6.com/index.php?p=sections&sid=3
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Old 01-04-2004, 09:08 PM
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I suffered through 17 years of my 2.8L under-powered dog before it finally bit the dust. Perhaps that's why I opted for the 5.7L Vortec swap. My only regret is that I waited too long to do the swap!
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Old 01-05-2004, 05:52 AM
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my wife has an 89 camaro with the 2.8 in it, with 189,000 miles.
the upgrades i did to give it alot more power,
cut off cat converter, added y-pipe and one inlet dual outlet series 40 flowmaster, high performance cap ,rotor, plugs, wires- cold air induction(homemade) and a cam from comp cams(the 2.8 and 4.3 are the same cams), polished the intake runners ...
but like alot of you have said, they aren't the most powerful motors out there but with a little old school tweaking it is possible to get some good power out of em..
and if you are using a carb on your engine edelbrock does make a 2.8 intake..hope this helps
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