GSRFREEK

I am piecing together a turbo kit for my 95 integra with a b18c1 engine in it and i have the opportunity to get a free 14b turbo off a first generation eclipes in mint condition and i was wondering if that turbo would be able to hold 5-8 psi till readline, i know that the t25 wont hold it but since the 14b is a little bigger i thought it might hold boost till redline

PureCRXtasy

This should answer your question.



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How to read it

First you need to do a couple calculations.

To get the Pressure Ratio, you use this formula:

PR = (14.7 + pounds of boost) / 14.7

so, you want 5 for min and 8 for max

( 14.7 + 5 ) / 14.7 = 1.34
( 14.7 + 8 ) / 14.7 = 1.54

Now you calculate your NA airflow rate using:

AFR = (engine size in cc * .061) * RPM * .5 * Vol Eff / 1728

so plug your numbers in and get..

(1800 * .061) * 5000 * .5 * .80 / 1728 = 127.8 CFM NA

*Volumetric Efficiency changes depending on a few factors. 80% is just an average. You could take that to 85-88% with a GOOD intercooler.

Now, multiply the NA ratio * your PR to get the AFR under boost 127.8 * 1.54 = 195.71

so, look at the compressor map and see that PR 1.54 intersects 200 cfm in the highest efficiency area. This is good. So to answer your question, a 14b at 8 psi will be extremely well balanced for your engine.

Then it's just a matter of plugging in numbers and seeing where they end up on the map.

GSRFREEK

I have absolutly no clue how to read that, can someone explane what that means so i dont feel stupid

turbohf

means that turbo is too ------ small...

GSRFREEK

thanks all i wanted to know

PureCRXtasy

Care to elaborate?

Semnos

you put the RPM at 5000...?
A B18C1 goes up to 8000+

turbohf

sure...i have a 60/63 (bigger than a 14b) and its still too small for my B18A...i would hate to have that turbo on my car...

PureCRXtasy

Did you miss this part?

I'm not going to do all the work..