Northstar Engines and System Technical Discussion Discussion, 4.0/4.6 Combustion Chambers in Cadillac Engine Discussion; Is there a difference between the 4.0 and the 4.6 combustion chamber sizes? I guess what I am asking, is ...
- 11-06-03 11:45 PM #1Cadillac Owners Fanatic
- Automobile(s): 2000 DTS
- Join Date
- Oct 2003
- Fort Myers, FL
4.0/4.6 Combustion Chambers
Is there a difference between the 4.0 and the 4.6 combustion chamber sizes?
I guess what I am asking, is can the heads be interchanged? If I find that my 4.0 heads are bad, I would like to slap on a set of 4.6 heads with the vin "9" cams for the extra hp. If the combustion chamber is larger, though, and they still fit, I would lose compression, wouldnt I?
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