1986 2.8 s-10 to a 3.4 - Hot Rod Forum : Hotrodders Bulletin Board
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Old 01-31-2004, 07:14 PM
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1986 2.8 s-10 to a 3.4

Hello, how much more hp is a 3.4 motor. I have heard that those 92 to 95 camaro motor blocks fit right in. Is the 3.4 a stronger motor all around, maybe when I blow this one up, the 3.4 is the way to go?

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Old 01-31-2004, 07:17 PM
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Why not bite the bullet and drop in a 350. Its a pretty easy swap. Would cost you about the same as the 3.4 swap.

Up to you.
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Old 01-31-2004, 07:56 PM
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It would cost about the same, but whether its is easier is not so clear. I did it, and the 2nd time around it would be easy, but not the 1st time. It is a real common engine swap, but don't think you can do it in a couple of weekends....this is major work for most of us. Think of it as going to school...if you haven't done it before everything will have to be learned. Once you learn it it is pretty easy, but not before.

I don't think I am making much sense. I did it and I LOVE the results. I thought it would take a few weeks ... it took a few years. If I do it again it really will take a few weeks, but I learned a lot.

Take a very serious look at jagsthatrun.com and spend the money on his S10 V8 swap manual. Read it 2-3 times. He knows what he's talking about. Don't depend too much on some other sites that are trying to sell you parts.

You will have to swap the engine, the tranny, the driveshaft (that's not a big deal) and realisticly the rear end also. All that means $$$$$. I'm into my swap about $5000 at this point and, although it runs great, I haven't even started on the body and interior. Next time I estimate I could cut that amount by maybe $1500, but that is still pretty serious money.

Don't get me wrong...I love what I have (OK...my wife tolerates it and the kids would rather not be seen in it). I may even do it again. Just don't think this is an easy weekend job.

So I know you're tired of your 2.8...maybe you love the S10 and want to do something with it...but if you're just looking for a project there are easier and cheaper ones out there. Personally, I love mine.

Good luck,

Dave
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Old 02-01-2004, 07:51 AM
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man, maybe I read the site wrong, but I thought the 2.8 and 3.4 were the same motor just bored and stroked different,.I didnt think you had to swap everything. The 3.4 wont bolt right on to a 2.8l 700r4?
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Old 02-01-2004, 09:29 AM
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I pulled this from a GM site :
Tired of that tired 2.8 V6 in your S-truck? It's time for a major upgrade, GM Performance Parts style. The HT 3.4 is a bolt in replacement for the 2.8 V6 in your 1982 - 1985 S-10 pickup or Blazer with automatic transmission. And it's emission legal in 49 states (Yes, you guessed it, California said no.) But for the rest of us, the HT 3.4 is the best thing going. With 160 horsepower and 194 Ft. Lbs. of torque your truck will feel better than new, and tow better than ever. The heads have large 1.72" intake and 1.42" exhaust valves and combustion chambers that yield a healthy 9 to 1 compression ratio. The camshaft is a high lift, short duration design, developed to produce lots of strong low end torque and mid range horsepower. With .427" intake and .454" exhaust lift, the cam ensures a strong pull to 5000 RPM. Doesn't sound like your 2.8 V6 at all does it? It isn't, when GM Performance Parts develops an engine we focus on making power. But not power for the sake of power, but power where you need it. For great drivability, towing performance and maybe even a little off road fun. The HT 3.4, a serious upgrade for your favorite little truck. With 40 more horsepower than your 2.8 V6, why would you even consider rebuilding that old 2.8? The induction system, ignition system, exhaust, emission controls, water pump and other parts required to bolt in your new HT 3.4 are already on your truck. Sounds like a weekend project or talk to your GM Performance Parts Authorized Center, they can install it for you.
Technical Notes:
This is for engines with carburetors only, not released for TBI usage. This engine does not have a clutch boss on the side of the block for standard transmission application
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Old 02-05-2004, 07:46 PM
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http://forums.s-series.org/viewtopic.php?t=52
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Old 03-05-2006, 12:04 PM
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Quote:
Originally Posted by catscan4free
Hello, how much more hp is a 3.4 motor. I have heard that those 92 to 95 camaro motor blocks fit right in. Is the 3.4 a stronger motor all around, maybe when I blow this one up, the 3.4 is the way to go?
The 3.4 is an easy swap...REALLY easy. I used the TBI and manifold from the 2.8 and I also replaced my injectors ( the old ones were getting tired) and really enjoy the reasonable gas mileage and the increased power. My vehicle is an 88 S-10 Blazer. Word of caution, your oil pan if you have a 4wd s-10 type isn't compatible with the newer 3.4 design... you'll have to get a pan from a slightly newer engine (mine is an 88 and it was compatible) from a parts re-cycler (read as salvage yard). Good luck.
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Old 03-13-2006, 12:03 PM
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Well mine is a 1986 engine.....but I already converted to 1988 oil pan and front pulley set up so mine would be comatible I think
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