305 details.

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305 details. - 12/7/2006 10:59:17 PM    313hitman Posts: 159 Joined: 10/10/2006 Status: offline Im looking for details on a stock 92 tbi 305 engine in a caprice. my pops told me that the stock 305 tbi runs a roller cam but I wanna know for sure. plus I want to know if I can remove the A.I.R pump and put on some headers. thanks everyone... _____________________________ in life only death is promised Post #: 1

RE: 305 details. - 3/11/2007 12:38:17 AM    btotheh33   Posts: 30 Joined: 2/14/2007 From: East Side B-lo Status: offline No it  dont have a roller cam and you can remove the air pump and all the plumming. I did it but i didnt replace my manifolds with headers and i had to plug all the holes in the exhaust manifold  where the steel line went fron the A.I.R. system. I also remover my a/c and replaced it with an aftermarket pully from advanced auto that bolted right in place of a/c pump. I'll get the part number for the belt i used. I just routed the old one and pinched a vise grip on the slack and they matched one up for me. (in reply to 313hitman) Post #: 2

RE: 305 details. - 3/23/2007 12:52:44 AM    313hitman Posts: 159 Joined: 10/10/2006 Status: offline will removing the a.i.r systems cause the car to act different?? _____________________________ in life only death is promised (in reply to btotheh33) Post #: 3

RE: 305 details. - 4/28/2007 8:53:48 PM    countilaw   Posts: 4 Joined: 4/28/2007 Status: offline Yes the 305 does have a roller cam.    Removal of the  air pump will not affect the running of the engine, but it will not pass emissions inspections,  it will burn up the catalytic converter.  (in reply to 313hitman) Post #: 4

RE: 305 details. - 5/27/2007 6:45:09 AM    1968 Pontiac Posts: 3 Joined: 5/27/2007 Status: offline I beg to differ on burning out the cat. My 92 chev K2500 truck with 305 tbi came from the factory without a smog pump. It just passed a smog test. That was with a brand new exhaust front to back, including headers, but the cat I removed was the factory original monstrosity, which would have been passing e-tests as long as we've had them here. Some of these trucks came with smog pumps and some didn't, but I don't know what the deciding factor was at the factory. But, a bad or removed O2 sensor will allow too rich a mixture to pass through the cat, causing premature failure of the cat. _____________________________ 1968 Pontiac Parisienne 1973 Buick Centurion 1985 Buick LeSabre 1989 Cadillac SDV 1991 Chev Caprice 1991 Oldmobile 98 Touring Sedan 1992 Chev K2500 EC/SB (in reply to 313hitman) Post #: 5

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