My stock turbo spools to 25 psi?

[jayhaitch]

It's fun watching my new gauges and seeing what the engine does, pyro/FP/boost.

Yet, I thought a stock ISB has a 20psi wastegate. Mine consistently hits ~ 25.5, then the needle pops down to about 24.5 and stays there as long my foot is in it. Is this normal? A problem? Is there a range wastegates can open?

[kgeiger81]

I had a '99 and that's about where mine ran stock.

[blowincoal]

I'm only hitting 17psi maybe 20 stock with a true flow air filter and straight pipe....is this bad?

[jfranklin]

only if you are in a hurry!!

[jayhaitch]

Not like I mind having lots of boost.......

Thanks for the info. Once I know the normal parameters on this truck I won't need to ask as many questions

[mattyboy72]

i can hit 46 pounds lol

[bbtank45]

i run my hx35 all the way up to 27 pounds with my adren on 10 on the 2000 series tunes.... she really likes the top end

[mattyboy72]

hmmm i think my turbo is crazy lol hahahaha anyone elses hit that high??

[gordz32]

Mine pegs on the needle at 35psi, I not sure if its accurate but I've only got the MP-8, AFE stg 2, and 5" straight pipe

[Burple24v]

mines bone stock with a 5" TBE and with the snap-on scanner it was showing like 22-23psi.

[Dad]

Originally Posted by mattyboy72

i can hit 46 pounds lol

Yours is a gen 3 common rail; they do run higher boost.

The gen 2 should waste gate around 20 PSI. Could be your waste gate is stuck, MAP sensor is reading a little off, gauge might be off, etc.

The real limit is mid-30's on the stock turbo. After that, you are outside the compressor map, creating super heated charge air and borrowing time on the bearings and shaft.

[gododge99]

i hit 35 psi as well with everything in my sig