what did it do to the car? cause any problems?

 

why get rid of it? turn it vaccum pump....

 

turn its vacuum up? wanna shed some light? ive never heard of that

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89 RS
305 TPI...

Previous:
2.8 s/c'd firebird

 

Well here's a fun fact- 1985 & 1986 automatic-equipped 2.8's didn't have an AIR pump. However, 1984 and 1987 2.8 automatic's did. Apparently it doesn't affect emmissions that much!

-Tom P (Hot rodded 1986 Firebird 2.8l) from http://www.f-body.net/mailbag/3rd/3rd_mailbag.html message boards

 

well the reason I was asking was because my headers dont have air pump fittings, so I was worried about it setting a code if it wasnt hooked up. Not to worry though I took it for a test drive and no codes were thrown. It doesnt have any owend grunt though with open headers

 

I'm planning on ditching my smog equipment. We don't have testing in this state, and if we ever do, I'll just convert it back.

 

vaccum pump.. crankcase pressures are bad for making power, a vaccum will essentially replace your PCV system, and will also replace your crankcase breather.. what you would need to do it plug off the pcv tube and grommet, and as far as the breather get tghe type that goes into the valve cover, and has a hose fitting on the top of it, run that hose to the intake side of the air pump, run the output line from the air pump downward towards the ground, clear of everything since some exhaust gasses and even a bit of oil will be discharged from it.. (you may have to modify the pump since not all units have a intake line where you can redially mount a fitting to it.. the way it works is with a vaccum inside the crankcase it will allow the rings to seal better for more power, and since your not using the PCV system your not geting all that contamination (oil, oil vapors, exhaust gasses, etc) into your air intake charge which will give you a denser mixture at the same time by keeping that added heat out of the intake.. if you want more details i suppose i could draw up a diagram...

 

Interesting... Never thought of doing anything like that!

Question: Is is possible to have TOO much vaccuum? Could it cause so much suction, that there would be blowby INTO the crankcase from the pistons? How would this affect oil pressure?

 

The easiest way to ditch the AIR system is to simply unhook the belt...

My friend is changing the head gaskets on a front-wheel-drive '84 2.8l, and it only has air pump fittings on the rear exhaust manifold. (Of course that's the hardest one to get to!)

-Tom P (Hot rodded 1986 Firebird 2.8l) from http://www.f-body.net/mailbag/3rd/3rd_mailbag.html message boards

 

the air pump being in really isnt that big of a problem since at most it only draws around not even a half a hp.. anyway as far as crankcase vaccum, i dont see anyway of creating so much pressure that it would cause valve seat falure or blowby.. even high performance racing vaccum pumps dont create that much vaccum, but theoritacally i suppose too much could possibly be a bad thing...