XR265HR in a 5.3 dyno graph and thoughts
#31
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thanks to this thread i have decided on the XR265HR cam! thought about the xr259 but i hear the rule is to always go up one cam you want and being 50/50 on these two and now to read all this 265 it is.....plus i will have to work with stock stall for awhile as its a slow process....
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I bought one of the sets from that ebay auction for $110. I am normally not a fan of buying used injectors but these were literally 1-2 mile old take-offs. Considering what the injectors sell for at cost from a stealership it was a screaming deal for literally brand new injectors.
#35
Excellent thread!! I have the same cam and it's going in my '06 5.3 next Monday, a tune is next. I read you set the shift points at 6300rpms, what is the recomended rpms shift points for this cam?
I'll keep the stock pushrods as I read it's ok to keep them with such a small cam. Besides my truck doesn't have a lot of miles.
I'll keep the stock pushrods as I read it's ok to keep them with such a small cam. Besides my truck doesn't have a lot of miles.
#39
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Based on the dyno graph 6300 rpm looks about optimum which is why I set it there. You really need to get past the peak a decent amount because of how far down the RPMs drop on the shift and to get the most out of the new powerband that cam provides.
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The valve events are radically different if I remember correctly and the high lift version appears move the powerband way too high IMO for what I was trying to accomplish.