3rd Gen / L98 Engine Tech 1982 - 1992 Engine Related

305 cam, porting, and stuff... stuff is important you know....

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Old Oct 31, 2002 | 10:01 PM
  #1  
whiteminqua's Avatar
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Joined: Aug 2002
Posts: 56
From: Shamokin, Pa. USA
Exclamation 305 cam, porting, and stuff... stuff is important you know....

Hi guys,
Hey, I am still investigating the 305 build up. I just got my extra plenum and base to be ported. What flat tappet 305 heads would you recommend that I get for the set up? (I want to have all my parts ready to install the day that I tear the thing down) I will be porting/polishing, new valve guides, and maybe larger valves...

Now, for something really interesting.... I called the cam guru at Crane Cams last week. He says that the 305 TPI 700R4 cars had less COMPRESSION than the 5 speed cars. I have heard of less cam, never less compression. Do any of you know this to be true? He recommended the Crane Powermax 2030 cam. This gentleman told me that I would need a bit more compression to make this work better, and that this cam is really all that he would recommend due to computer considerations. What do you think??? He also stated that this cam works best for low end power and this cam would not require headers... he said that the headers would hurt low end power, even with 1-5/8" primaries. Now I am confused...

ps.... I just got the 2030 cam on ebay for $56.00, new in box
Old Oct 31, 2002 | 10:10 PM
  #2  
Sitting Bull's Avatar
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Joined: Jul 2001
Posts: 550
From: Calgary, Alberta, Republic of Western Canada
Use any 305 heads that aren't from a TBI car. Then follow the link at the end of my sig to learn how to port and polish them. These babies flow like Vortecs when done right.

Do YOU want to use headers? I would because they add at least 30 hp with a good 3" exhaust.

What are your rear gears? If they are 2.73s then you will want to change them to 3.42s or so before long. That will more than make up for any low rpm torque loss caused by the headers. It is miniscule in any event, so I wouldn't worry about it.
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