Rebuilt Engine, Boost too low?

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09-26-2007, 08:34 PM

#21

One320B

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Join Date: May 2005

Posts: 959

It's hard to say - but I would guess that would PART of why you arent seeing boost all the way to readline with a stock turbo, the nice thing though - when you get a new upgraded turbo, that porting will help the bigger turbo make its power all the way to redline

09-27-2007, 02:56 PM

#22

zRotary

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Join Date: Jun 2006

Location: Germany

Posts: 70

which turbo do you think is best for response and the porting i have?

i was thinking of going the plug and play way, and wanted to upgrade to BNR3.

but it would make no sense if its not the perfect solution for the porting i have.

i am not up for dragracing, but circuit and highway (highspeed)

09-28-2007, 01:27 PM

#23

zRotary

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Join Date: Jun 2006

Location: Germany

Posts: 70

Quote:

Originally Posted by One320B

If you blow through a 1/2" straw as hard and fast as you can, you'll feel that pressure build up in your cheeks... but now blow through a 1.5" straw as hard and fast as you can - all the air will escape very quickly and NOT build as much pressure.

hey, after reading a post from Lynn, i think i got what you were up to tell me.

You meant, if the runner (i think i call them right.. (the "tube" from LIM to the intake Port) is incrased in volume, its like a bigger straw and slows down the velocity of mixture going threw it. am i right?

if i am right.. i have to tell you that my runners have got some porting, they have much more volume over stock!

could THIS be the reason for lower boost at high rpm?

09-28-2007, 01:52 PM

#24

One320B

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Join Date: May 2005

Posts: 959

That could be a factor - probably not the entire reason.

As for the turbo - a stock upgrade would be good. You should use at least a 60-1 compressor side on a large sp IMHO..