S480 changing from stock cover to race cover
#1
S480 changing from stock cover to race cover
Well as some of you know I put the truck on the rollers. I was happy to mae 955hp, but sort of surprised at how the power fell off in the higher RPM'S. It felt like it was losing power up top, and I wanted to be certain, and I was right. I would like to correct it and make it pull higher in the RPM'S. I plan on tearing the engine down to inspect parts over the winter, and while I am in there put in a cam that Stock48 suggests. I also would like to upgrade the turbo, and I am not sure what parts need to be changed for the perfect setup. I will more than likely be staying around 25PSI. Should I go with a billet wheel? Should I upgrade the cover? I have seen that they make a V1 cover with a slip on hose, and a V2 with a 3.5" V-band. Does anyone have any real world experience? Here is the graph so people can see how it is dropping off. And I actually ramped the timing up after 5700 so it would pick up more power.
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#8
Staging Lane
Looking at the compressor map, ur going beyond the efficiency of the compressor. Might be something to look at before u try a bunch of other upgrades. That compressor was only designed to produce 120 lb/min at 4bar. im guessing ur only at around 2.2 bar pushing 125 lb/min into that 370.
http://www.theboostlab.com/store/pro...09755_zoom.jpg
http://www.theboostlab.com/store/pro...09755_zoom.jpg
#10
Mod with training wheels
iTrader: (16)
I don't think the turbo is done yet... Exhaust reversion during overlap looks just like a choking compressor when looking at a dyno power curve. I'd like to see someone really max out the cast s480. Jarrett went 6.0x @ 117 in the 1/8 and he said it still had more to give...