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Old 12-28-2002, 11:27 PM
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Post 2.8L 60 V6 Head Q's

I lost 2 cylinders on my '84 S-10 due to two intake valves burning up. So I went to the auto wreckers and they gave me 2 heads from an '88 firebird which fit fine except I have to remove an intake manifold stud and get a bolt instead.

Anyways, the only other difference is that the valves on the new heads are bigger, how much more power would that give me? Are there any stock heads that are really good?

Oh ya, on the engine (353,000km) the top piston ring lip is only .005 to .008 and most cylinders have a heavy white/beige buildup on the spark plugs, valves and piston faces. The engine goes through a lot of oil as well. What is causing the buildup?

What do you guys think about the cavalier multiport fuel injection for the 2.8 liter engine? the manifold is an easy bolt in, are there many computer parts and sensors that would ahve to be carried over?


[ December 29, 2002: Message edited by: Johnny Bravo ]

[ December 29, 2002: Message edited by: Johnny Bravo ]</p>

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Old 12-29-2002, 03:44 PM
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your new heads will give you a little more power but the intake and carb are the biggest restrictions, the buildup is oil use as you stated, the engine probably needs a ring job and with that much taper in the bores consider having it bored, did it smoke when you first fired it up when the other heads were on the truck? if yes it needed valve guides and seals before it did in the valves.
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Old 12-29-2002, 06:57 PM
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the fuel inj is a bad idea. well maybe not realy. but is is a pain in the *****. those heads make 140 hp on mpfi 2.8. I had a fiero with a 2.8 ported heads and intakes, and a 100hp shot of NOS running 8.7sec 1/8th mile times.
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Old 01-02-2003, 04:20 PM
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Just an update: I finished putting it together and a few unexpected problems popped up, only had part throttle (manifold stud was blocking) so I bent the throttle arm out of the way, it has a small exhaust leak that I'm not going to worry about. The water temp. gauge changes temp rapidly now, i think that before it was just dirty contacts and didn't respond very quick. I took it to a fuel specialists shop to get the timing checked out and then I found out that the vacuum advance was shot, and as the guy was changing it, found broken wires on the pickup coil, had to change that too, he says that the wire was just dangling there and that explains why sometimes it would just cut out when I was going down the road intermittently. I was getting 13-19mpg, now that its running strong again (still smoking though) my mileage should go way up.

Thankyou for your ideas and suggestions!
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