Edelbrock heads and compression

[NO SLO PK]

Actually, the 6037s cause less detonation compared to the stock heads, in my experience. With the 6037s, I could dial in another 2-3 degrees easily without detonation. I was also able to increase boost a little. The short explanation to this is the 6037s are made of aluminum vs. the stock heads which are of cast iron. It has to do with the different thermodynamic properties of the two materials.

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'91 LX
Procharger, 3 row intercooler, extrude honed Cobra intake, Mac full Length Headers, 30# inj., 73mm C&L, 75mm tb, E303 cam, 289 rods, ported E7 heads, MSD, T-Rex w/255 lph Walbro, 5 lug conversion, Cobra R wheels, 3.27 gears and Moser Axles.

[This message has been edited by NO SLO PK (edited 02-10-2001).]