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Brettus turbo 11

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Old 01-23-2013, 01:23 PM
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The old engine (and turbo) was getting tired (still need to get it apart) . Decided to build a stronger one and see what other improvements i could make relatively cheaply while i was doing it . Wanted a reliable 350whp on a greddy . Something not done before even with much larger turbos. Also wanted to try my port runner mod idea out .
Last edited by Brettus; 01-23-2013 at 11:26 PM.
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Old 01-23-2013, 06:07 PM
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it looks like with the boost leak fixed you gained faster spool time,
I would think going with a larger compressor housing does create some lag time, but minimal, and your engine maybe breathing in more air so its harder for the compressor to build up pressure to a hungry engine

I don't claim to know anything, and I don't claim my statments as facts.
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Old 01-23-2013, 06:13 PM
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More air in equals more exhaust out for the turbo to spin :P

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Old 01-23-2013, 06:21 PM
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Brettus--you lock your ssv open yet?
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Old 01-23-2013, 11:15 PM
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Originally Posted by olddragger
Brettus--you lock your ssv open yet?

Tried that - like the way it works stock
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Old 01-23-2013, 11:25 PM
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Originally Posted by Brettus
The old engine was getting tired (still need to get it apart) . Decided to build a stronger one and see what other improvements i could make relatively cheaply while i was doing it . Wanted a reliable 350whp on a greddy . Something not done before even with much larger turbos. Also wanted to try my port runner mod idea out .
The greddy manifold is the weak point in your set-up ... its waaaay restrictive
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Old 01-23-2013, 11:30 PM
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Originally Posted by stinksause
The greddy manifold is the weak point in your set-up ... its waaaay restrictive

Veee shall zeee !

If I can make 350 whp at 10-11psi ................... maybe it isnt ?
Last edited by Brettus; 01-24-2013 at 02:21 AM.
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Old 01-24-2013, 08:01 AM
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^----- Thats my goal~!
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Old 01-24-2013, 08:27 AM
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I guess that is a difference between a SC system and a turbo? My car responded very well to locking the the ssv open. I also like that I was able to eliminate a fail point. Remember? I lost an engine once when the ssv lost vacuum while I was tracking--it closed and I had a boost spike.
I will send you a data log--see what you think?
My tuner is ok with it.
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Old 01-24-2013, 09:04 AM
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Originally Posted by olddragger
I guess that is a difference between a SC system and a turbo? My car responded very well to locking the the ssv open. I also like that I was able to eliminate a fail point. Remember? I lost an engine once when the ssv lost vacuum while I was tracking--it closed and I had a boost spike.
I will send you a data log--see what you think?
My tuner is ok with it.
A turbo wouldn't spike the boost if the SSV failed .
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Old 01-24-2013, 09:05 AM
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Originally Posted by hoss -05
^----- Thats my goal~!
Better be quick !
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Old 01-24-2013, 09:14 AM
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Ugh still not even close Brett. I should have my engine mount done in the next few weeks though.
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Old 01-24-2013, 08:55 PM
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dang you and your fancy fail safe systems
maybe I need a wastegate too--lol
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Old 01-24-2013, 09:49 PM
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Originally Posted by olddragger
dang you and your fancy fail safe systems
maybe I need a wastegate too--lol
Speaking of which ..... I really want to rig up something that cuts boost pressure if fuel pressure gets low . Pretty sure i can do something simple with the blow off valve
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Old 01-25-2013, 03:58 AM
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How about AEM wideband failsafe that can be programmed to cut boost if AFR goes lean under boost.

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Old 01-25-2013, 09:07 AM
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that would be interesting. Didnt mazdamaniac have something like that?
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Old 01-25-2013, 01:05 PM
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Originally Posted by thewird
How about AEM wideband failsafe that can be programmed to cut boost if AFR goes lean under boost.

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Details ?
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Old 01-25-2013, 01:28 PM
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seems you could get a gauge with a warning light or warning output, then have that go to either your boost controller to cut it, or go to a solenoid connected to a vacuum box that opens when the warning happens, IE forcing your wastegate or blowoff valve to open
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Old 01-25-2013, 01:43 PM
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Originally Posted by FazdaRX_8
seems you could get a gauge with a warning light or warning output, then have that go to either your boost controller to cut it, or go to a solenoid connected to a vacuum box that opens when the warning happens, IE forcing your wastegate or blowoff valve to open
But where do you set the warning light ? Given 14.7 is normal running which is too lean under boost , you would need a signal for boost as well which prevents operation out of boost.
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Old 01-25-2013, 02:19 PM
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by the time the a/f was registered and signal sent it would be late?
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Old 01-25-2013, 02:20 PM
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Originally Posted by olddragger
by the time the a/f was registered and signal sent it would be late?
Good point - . The FP guage idea is better for this reason i think .
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Old 01-25-2013, 03:18 PM
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Hmmm.......

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Old 01-25-2013, 03:25 PM
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what he said ^^^
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Old 01-25-2013, 04:03 PM
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Better, it's adjustable.

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Old 01-25-2013, 04:23 PM
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Originally Posted by FazdaRX_8
seems you could get a gauge with a warning light or warning output, then have that go to either your boost controller to cut it, or go to a solenoid connected to a vacuum box that opens when the warning happens, IE forcing your wastegate or blowoff valve to open
Originally Posted by Brettus
But where do you set the warning light ? Given 14.7 is normal running which is too lean under boost , you would need a signal for boost as well which prevents operation out of boost.


I think he meant a fuel pressure gauge, mine has a warning light and you could rig this up to relieve boost pressure when the warning light comes on I imagine
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