How much boost is needed? - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 15 (permalink) Old 09-15-2010, 03:09 PM Thread Starter
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How much boost is needed?

I got a set of 225's with 100% nozzles and with only 35psi of boost above 2500rpm's it's dence black smoke. What boost are you guys seeing with your 225's and what turbo?

I just got a a3000 turbo it's small


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post #2 of 15 (permalink) Old 09-15-2010, 04:23 PM
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Re: How much boost is needed?

Yeah sorry to say you have way too much injector for your turbo. I have run 225's with 100% over nozzles in my compound setup for the last three years and even they smoke a little.

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post #3 of 15 (permalink) Old 09-15-2010, 05:35 PM
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Re: How much boost is needed?

I thought you were going with a powermax?

o4 RC six speed.
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post #4 of 15 (permalink) Old 09-15-2010, 07:12 PM Thread Starter
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Re: How much boost is needed?

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Originally Posted by 6.0 six speed View Post
I thought you were going with a powermax?
I sold it, I got a real good deal in this a3000 mostly wanted the pedistal I'll be putting a s300 or some 66 on it soon. The tq it makes right now feels good.


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post #5 of 15 (permalink) Old 09-15-2010, 08:21 PM
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Re: How much boost is needed?

Exactly what Tyler said, you got too much fuel and not enough air. 66 or bigger turbo with the injector ur running, or twins

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post #6 of 15 (permalink) Old 09-15-2010, 08:51 PM
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Re: How much boost is needed?

is the a3000 the one you had at bedford?
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post #7 of 15 (permalink) Old 09-15-2010, 09:46 PM Thread Starter
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Re: How much boost is needed?

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Originally Posted by Dustball8504 View Post
is the a3000 the one you had at bedford?
Yea, but i was still running stock nozzles on the 225's at the time.


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post #8 of 15 (permalink) Old 09-18-2010, 06:43 PM
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Re: How much boost is needed?

Would I be crazy to assume that some turbos move more cfms that others and that might make boost a irrelivant number? People are commonly saying that their egts are lower at the same boost levels with upgraded turbos. That leads me to think turbo a and turbo b could produce the same amount or boost. Yet have a very different amount of air pumped.

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post #9 of 15 (permalink) Old 09-18-2010, 10:39 PM
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Re: How much boost is needed?

its about cfm not psi...
mine only put out 45 (what i had the wastegate set at) and there was little to no smoke with my 225s


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post #10 of 15 (permalink) Old 09-20-2010, 04:49 AM Thread Starter
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Re: How much boost is needed?

Cool got a s300 on the way think 45psi will help. I would think the stock intake and heads will always flow the same cfm at the same boost level. Now finding a turbo that can produce higher boost with ebp that is not to high is the important thing.


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