my combo on a 408
05-30-2009, 09:49 PM
#1
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my combo on a 408 I am looking into getting a 408 short block, I am wondering how well the upper components will do. On a stock bottom end I made 465rwhp and 430rwtq. The parts are ET 215 heads milled to a 56cc chamber making about 12:1cr, ported fast 92/92 setup, I do have a maf but plan on going speed density, 1.75 QTP headers. My goal is to be well over 500rwhp, would these heads be sufficient on a 408 and would all of my stuff like the oil pump and timing chain set swap right over to the 408. Thanks for any input.
05-31-2009, 09:44 PM
#2
Sounds ok, depends what you mean by "well over" and what is the goal for the car. Mine was 90% street fun, no racing, just 2-3 annual track visits...I just got my 408 running and the most impressive over the LS1 was the TQ. Cam selection is important, what was rough on a 346 isn't on a 408. The head cc volume may be an issue. I'm no expert on the cc volume for Comp ratio but for sure negative dish. For me, my 243 CNC heads needed -10. Bottom line all parts will bolt on to the LQ9.