I have a 1994 integra just drop a b20b i was wondering how safe will it be to turbo it 5psi...?

 

how long is a piece of string?

 

?

 

but seriously, 5 psi is **** all. i'd say on a b20b (usdm) you wanna throw at least 7 or 8 psi at it. it's only like 8.1:1 compression on those.
if the motor's in even half decent shape and you've got a DECENT tune, 8psi all day no prob.

 

it's a figure of speech. one of my favorites. means there are many variables to the question which are unanswered.

 

oh i see,, yea motor is healthy runs strong so 7-8 psi will be safe wat about hp tq ?

 

see my original post...
there are just way too many variables to throw out a decent assumption.
the stock b20b is a pretty low output hp motor. do yourself a favor and ditch the weak intake cam. opt for at least a stock 94 integra cam.
IMO, it's a great motor for boost. some arp head studs would add insurance. everybody says "the walls are too thin" but really? have they ever actually witnessed this failure? i sure haven't.
8psi on a good tune. dollar for dollar, it'll go faster than anything else at the same price.
just make sure you have everything to make it work right. it's not just a turbo, IC, and some pipes.

 

It will be fine, just get a good tune.

 

please stop using psi. it means nothing.

it'll work fine with a good tune, i would not go over 300whp with a b20.

 

Saying the motor runs strong doesn't mean it's healthy. You need to do a compression test and maybe a leak down test.

Not knowing the engine compression is like high blood pressure...

 

care to explain how boost pressure is an irrelevent component?

 

10 psi from a gt28 is not the same as 10psi from a gt35. so psi is irrelevant without knowing exactly what turbo will be used and is pretty stupid when determining what an engine is capable of withstanding.

 

ahhh. i see. good point

 

Yes, read the Forced Induction FAQ.

In the simplest sense, boost pressure is a measure of how restrictive a system is relative to what is being pushed through it. If you run a turbo full-blast into the atmosphere, it still moves a massive amount of air, but at 0psi. Similarly, take that turbo and hook it up to a very small 1" pipe...before it begins to move even a fraction of the airflow as before, it will begin to build boost (restriction) inside the pipe. For this reason, variations in efficiency, piping size, and a whole host of factors, can influence the power made per psi of boost...even for the same turbo. To this end, PSI is NOT a useful measure of power. It is important when choosing a MAP sensor, and thats about it