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Originally Posted by SSLance
Looks great! Nice work. Did you fill with water and test for leaks before final install?  |
I didnt until you said to.....I built an elaborate setup so that I could pressure test with air and check for bubbles. My entire career has been in HVAC Service and that is how we test for leaks so I am comfortable with it and can 100% pinpoint them. I managed to find 2 pinhole leaks, got those ironed out and installed for good. Thanks for the tip Lance. I would not have checked and would have been pissed at myself.
Quote:
Originally Posted by payne
I love the build. Really impressive! Are you running E85? Meth? Stock LSA heads? What's your peak boost?
I daily drive a 3-pedal CTS-V with a stock longbock LSA @ 702rwhp, and I might encourage you to consider a larger pulley than the 2.45"
The 2.45" will work great on the street, autoX, and speed stops, but you're gonna be fighting IAT2s all day long spinning the blower that fast on the track.
You're correct that an ice tank will not help on the track either, other than the first 2-3 laps. The reality is that the brick in the lid just doesn't have the ability to shed as much heat as the blower generates with that small of a pulley for the typical road course WOT profile.
Is your pulley interchangeable? IE could you run a 2.45 for most events, then swap the pulley and tune for road course events? If that's legal, that might be the hot ticket.
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Was at 8lbs on stock setup, pump gas, no meth, just normal boosted pump gas engine. Tune is very conservative. Keep in mind that this is a 6.0 Gen IV truck motor, its not an LSA block, heads or accessory drive. I wish =)
From what I have read and researched....
The LSA crank pulley is 7.8" and the stock truck crank pulley I am running is a 7.5" so that means I have an underdriven crank pulley. I should be overdriving the blower by approx 20% with a max speed of under 20,000 rpm with the 7.5" crank and 2.45" upper. I also cannot fit a larger pulley in there with the Nick Williams Throttle body.
https://www.lingenfelter.com/PRI2014...heet%201.1.pdf
The other thing to note, I dont spin this thing to the moon. I have my rev limiter set to 6200 currently and usually shifted about 5600 to 6000.
I am going for smooth, reliable horsepower on this setup so the tune will take that into account.
The one thing I am worried about is the brick and wonder if I should install a reinforced one while I have everything apart.
Appreciate all of the pointers though, sure helps having others keep an eye on it. I also don't think Ill be anywhere near your 702 wheel hp.
Sean