not hitting full boost

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07-23-2007, 12:41 PM

#11

reactone

1.5 BAR

Join Date: Jul 2005

Posts: 1,069

Re: not hitting full boost

Quote:

Originally Posted by flipkronikz

so with a mbc i can up the boost passed the wastegate spring psi of 10psi

i always thought the mbc could only go as high as the spring setup on the wastegate.

You got it backwards, with an MBC you can't go any lower than the spring value.
IE; a wg outfitted with a 5psi spring cannot be lowered any more than 5psi, but can be raised to any level that the turbo can output.
Also, if you are running an external gate, you should hook up the boost controller between the vac/boost signal and the top port of the wastegae.

07-23-2007, 12:56 PM

#12

ghettoturbo

Guest

Posts: n/a

Re: not hitting full boost

Quote:

Originally Posted by reactone

yes and no...sometimes its tough getting a wg with a low opening psi to work at high boost levels

07-23-2007, 07:56 PM

#13

flipkronikz

0.5 BAR

Thread Starter

Join Date: Oct 2006

Posts: 52

Re: not hitting full boost

so basically scratch the dual spring idea and get the mbc for the 2 psi?? i might as well bump it up to 12psi and call it a day. anybody have any suggestions for where my adjustable cam gear should be set up at

im currently at 2 degreees advanced and havent really noticed any big gains. im thinkin about retarding it 2 degrees for better top end. let me know guys.

07-23-2007, 09:04 PM

#14

reactone

1.5 BAR

Join Date: Jul 2005

Posts: 1,069

Re: not hitting full boost

Quote:

Originally Posted by ghettoturbo

yes and no...sometimes its tough getting a wg with a low opening psi to work at high boost levels

I would definitely agree with that! I had a 3.6psi spring in my gate, trying to increase boost to 10 via mbc, I got massive boost spikes. So I switched it out with one of the other springs ssac sent me when I opened up my wg and found a 1bar spring!

No more spikes!