Does anyone know how much boost the stock b18b motor will hold.

 

its not so much "boost" you can measure, because the b18b could take 20 psi on a very tiny turbo, vs lower boost levels w/ a huge turbo.

Its more along the lines of POWER the b18b can hold. The b18b's heads suck....

but anyways, it will surely handle 300 whp daily, i know first hand

 

With a stock B18B and T3/T4 turbine.....8 psi is max because anything beyond that...the pistons will go!!!!!!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by NVturbo &raquo;</TD></TR><TR><TD CLASS="quote">With a stock B18B and T3/T4 turbine.....8 psi is max because anything beyond that...the pistons will go!!!!!! </TD></TR></TABLE>

Sounds like one of the guys who hang around the shop where I dynoed my car. Just a few minutes before I did a 12 PSI run on a stock motor - and continue to everytime I choose to run high boost (which is often). As Mase said, it is power that you should be concerned about.

 

Wow mase I thought you would tell him to search.....anyway isnt engine tuning one of the most important parts?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by NVturbo &raquo;</TD></TR><TR><TD CLASS="quote">With a stock B18B and T3/T4 turbine.....8 psi is max because anything beyond that...the pistons will go!!!!!! </TD></TR></TABLE>

Where did you read that Superstreet

Anyhow, yeah i would say 300 is a nice stoping point on the stock motor, and like Mase said it's not psi, because that varies from turbo to turbo, but hp is a more precise way to measure a motors limits.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by quikB18B &raquo;</TD></TR><TR><TD CLASS="quote">

Where did you read that Superstreet

Anyhow, yeah i would say 300 is a nice stoping point on the stock motor, and like Mase said it's not psi, because that varies from turbo to turbo, but hp is a more precise way to measure a motors limits. </TD></TR></TABLE>

Nah ..i dont drool over Stupid Street like you.... I am speaking from experience because in my cousin's setup (stock at the time) the pistons cracked and he doesnt even drive it hard that much...boostin @ 9psi.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by NVturbo &raquo;</TD></TR><TR><TD CLASS="quote">

Nah ..i dont drool over Stupid Street like you.... I am speaking from experience because in my cousin's setup (stock at the time) the pistons cracked and he doesnt even drive it hard that much...boostin @ 9psi. </TD></TR></TABLE>

So just because your cousins motor blew that means that is the max
Maybe you should do a search, there are tons of people making 275-325 whp on stock Ls 12-14 psi. and pleased don't say that they are not reliable because there is a handful of memebers/friends locally to me that have done it and not one motor has blown. I myself am tuning this month to 12-13 psi, ill let you and know how it goes

Not trying to be a dick, but 8 psi is by far not the limit of the Ls motor, I have seen it done over and over again.

Is your cousin using Fmu? If not what fuel management? Maybe that was the reason his motor blew. On fmu I would say 8 psi would be the limit on the Ls motor because of small injectors, and high fuel pressure from this bandaid type management.


Modified by quikB18B at 9:52 PM 1/7/2004

 

I'd like to know what the blown motor was using for fuel management as well... 8 psi is not really that much....