Run at least 10# all the time. It is safe. 12# on pump gas with a stock motor and a spot on tune is about the limit, but I ran 11# with a really rich tune for about a year no problems. You will save mucho time and fab going with a trick set up over fabing your own stuff, and his parts are quality and customer service is awesome... and yes i have his parts.
I am going to be doing a twin set up with Rick as soon as I get the LS into the 90 model so I really suggest going that route.
90 GMC RCSB Forged 370 and Built 4L80E from the VHO going in slowly but surely
89 fox body notch... No motor or tranny mod but a narrowed 9" w/ 35 spline axles and a spool!!
2011 Tundra CM 4x4...
Your fuel system will need to be upgraded as well. With that size turbo, on a 6.0 running 10psi you will probably need 60# injectors and a bigger fuel pump. You might want to think about methanol injection to help with IAT's and add a little more hp.
2004 Silverado Crew Cab, forged iron 5.7, STS w/MP turbo, 10+ psi, FMIC, Tial 50mm BOV, Vic Jr, Snow performance meth, MTI Stealth cam .220/.220 .581/.581 115lsa, Comp chromoly pushrods, Yank TT3000 stall, LS1 Efans, 160 tstat, Trucool 40k trans cooler, 60# injectors, Walbro fuel pump, Patriot springs, Built 4l65E w/billet input & output shafts, Eaton posi, SD tuned...all installed by Klein North Automotive
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