I have an '88 Cavalier Z24 with the cowl induction. It's a 2.8
multiport 5 speed and I think it's kind of a dog. I know it's only a
2.8 but it's also a very small car. Being a convertible may make it
I do have the EGR vacuum line disconnected, as it seems to run better
that way. I haven't replaced it because it doesn't have the original
engine in it, and there are two different EGR's available for it,
depending if it's an automatic or stick -- and I don't know which kind
of car the current engine came out of. As a new EGR is expensive I
can't afford to buy one without knowing if it's the correct one or not,
nor if that's the reason if it doesn't change the performance.
It has had new heads about 20K ago, along with plugs, wires, etc,
sounds good, idles smooth, etc. and gets 28 mpg on the highway -- it
just seems like it should have more power.
Would putting a K&N air filter on it give me any appreciable
improvement? Also, would it sound any different (you can hear the
induction noise thru the cowl -- would that sound be any more
It will have some benefits. Your car will be faster because it does not
have to haul around the weight of the extra money taken out of your wallet.
The local auto parts store will be grateful since business is down in these
The guys at the K & N plant will send you a Christmas card.
Another way to increase performance it to take the money you'd spend on the
K & N filter and use it as a down payment on a Camero.
Personally, I'd not put a re-usable filter on an engine that I owned. I
can get into all the arguments why, (not that much more efficient,
changes the dynamics of the air-intake tuning which may not be good,
allows more 'dirt' into the engine, higher maintenance costs, etc.
Look at it this way. Does a K&N let in more air. Maybe, BUT they also
let in more dirt.
Also consider that the air filter that comes standard on that engine
flows well over the cfm rating of the carb at WOT.
Put into an example: Take a 4" piece of pipe and put it over your
nose/mouth and breath through it. Now use a piece of 6". See any
difference? NOPE. Neither will your engine.
Thanks for the replies. I suspected it would be a waste -- but I still
was willing to consider it, in a desperate attempt to extract any last
bit of available power I could get from the engine.
I guess I was comparing the power I'd expect from this car with that
of the '93 Gran Prix we had, which had the 3.1 and had LOTS more power
than this '88 2.8.
Most people who ride in this car with me think it sounds good and has
decent power -- but that's because I tend to rev it up into the
powerband during ordinary driving, and it's kind of fun to drive that
way. But trying to pass someone on the highway, even dropping it down
into 4th, is difficult -- whereas the 3.1 GP we had would walk right
around anything just as good as you'd want.
Does the fact that I have the EGR disconnected have any bearing on the
On Wed, 24 Aug 2011 11:30:40 -0700, email@example.com
(blowout preventer) wrote:
My Celebrity with 2.8 had about the same low end torque as my 3.1
Lumina. Never timed them, but they feel similar in power.
Plenty of get up and go.
Similar to each other in higher speed passing capability too, which is
mediocre. But I don't drive 2-lanes where I have to go into the
opposing lane, so it never mattered.
These 2 engines are almost the same in most power specs.
The 3.1 had maybe 15 more horses.
Your Cav with 2.8 should go about the same as a GP with 3.1.
But I don't know how much weight the ragtop adds.
You should be able to find most of the specs for these cars somewhere.
A quick look found these numbers.
I always keep EGR stock and working, so I don't know about that.
Try connecting it and see if there's a difference.
You said 28 mpg highway, and that's what I got with my Celebrity 2.8
on trips with about 600 pounds of driver/passengers, trunk full and
tail low. The Lumina does 1 or 2 better.
But you might have something off in your engine that affects
acceleration. Timing maybe.
Sure your clutch isn't slipping?
Could just be your imagination too.
Don't waste money on that car trying to make it a speedster.
Just enjoy it for what it is. Sounds like you like it, so you're
ahead of the game.
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