ive been running 17 psi for a while now stock long block besides cam , heads have never been off motor. old timers just dont get it no matter how much experience they have. if they havent messed with the new ls stuff all of there knowledge and comments go right out the window no disrespect intended of course.

 

Scr to boost? Whats stock 5.3? 9.5:1 or so? yeah, they are good over 30psi

 

Glock from Tellez motorsports ran 20-23 psi hitting 10.01 on a stock bottom end 5.3

 

I have a 03 stock bottom 4.8l with only a small cam. I did change the heads to the newer 799s but they are stock as well. Lowered my cr just a bit. I plan to push this motor till it pops which i hope can handle 20psi daily and a bit more at the track on race gas

 

Well guess I don't have a stock bottom end then LOL

 

Stop discussing stock bottom end guys and get back to what this post should really be about. FACTS ! People please start posting your engine size , Boost and what size Turbo. Just saying you run 15psi means nothing. There is a big dif. if you compare 17psi from a 70mm & a 88mm.

 

People were clearly confused as to what one considered "bottom end" so discussing it was the only way to determine what the OP considered a stock bottom end so people could correctly answer his post. Can't post "FACTS" if everyone has a different view to the question now could they.

 

stock lq9 (6.0) 17psi from a D1 procharger w/3.4 pulley . new set up now but havent taken it wot yet , 10% over drivin now with a 3.5 should be in the ball park of 19 psi now will see when i get fuel trims in check.

 

STOCK BOTTOM END= THE WAY THE SHORTBLOCK COMES FROM THE FACTORY. PERIOD. Anyone that thinks something different is a retard ! If guys want to argue or discuss anything different then open another thread. I hate reading 5 pages of something that has noting to do with the original question or post.

 

Now we're talking. I'll have my # up this weekend after taking my trick stage 3 turbo truck to the track for the first time. I'm set at 7 psi with my 76mm on 93 octane. I'll see if I can turn it up with the help of a little Meth. I'll let you guys know.