What's my problem??? missing HP + goofy curve
03-23-2004, 09:33 PM
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What's my problem??? missing HP + goofy curve Sorry I don't have dyno graphs to post. My set up(ARE 346, TEA 5.3., TR 230) was showing valve float at 6400 with YT rockers and 987 springs. I changed the springs to the new crane duals and my dyno curve got wierd. The peak HP was achieved at 6100(422rwhp), where it dropped to 400 at 6300 and stayed there until rev limiter. What do you guys think? Lifters?
Last edited by max's dad; 03-23-2004 at 09:38 PM.
03-25-2004, 11:30 AM
#5
Some folks encounter valve float with YT when springs were on the edge. I think Verbs had a similar experience with his YT's & 987's.
With the heads milled .025 the 7.35 pushrods sound right on the mark.
If the graph is still funky with the new Cranes, I might swap the stock rockers back on and see if that had an effect on the graph.
With the heads milled .025 the 7.35 pushrods sound right on the mark.
If the graph is still funky with the new Cranes, I might swap the stock rockers back on and see if that had an effect on the graph.
03-25-2004, 07:22 PM
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Originally Posted by 99 Black Bird T/A
Some folks encounter valve float with YT when springs were on the edge. I think Verbs had a similar experience with his YT's & 987's.
With the heads milled .025 the 7.35 pushrods sound right on the mark.
If the graph is still funky with the new Cranes, I might swap the stock rockers back on and see if that had an effect on the graph.
With the heads milled .025 the 7.35 pushrods sound right on the mark.
If the graph is still funky with the new Cranes, I might swap the stock rockers back on and see if that had an effect on the graph.
Could the Crane springs, at a wrong install height, overpower the stock lifters?