Brettus Turbo install thread
Don't get defensive about it - I'm not attacking you
actually, on second thought, because the greddy peaks early, you really might not have any drawbacks with shifting at 7500. The 9k limit is useful if you need to stay in gear for a little bit longer.
Less wear on the transmission FTW.
Less wear on the transmission FTW.
On the track, I've played around with shift points and 8200 is pretty much as far as I need to go with all this power down low.
Really, to keep temps down, I end up shifting at 7200.
Really, to keep temps down, I end up shifting at 7200.
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Boosted Kiwi
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Looking at my existing dyno and the difference between my two runs , i'm thinking around 275 -280 hp at 7000 and around 7.5 psi at the manifold is realistic .
The 300 does look a bit high ......
The 300 does look a bit high ......
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Been playing around with my boost controller . Trying to get a steady 10psi through to as high a rpm as i can . Have managed to make 9psi at 7000rpm (so I know the turbo will push enough air ) but this is at the expense of too much boost early on .
This brings a few problems as the huge rush of torque with more than 10psi as you mash the throttle makes the car too hard to control - not what I want at the track.
If I drop the 'gain ' value it is more subdued early on but the boost drops off later.
Have taken to setting the overboost limit down and trying to get the controller to knock the boost down early on which allows a higher 'gain' setting and higher boost later . Less than ideal.
I'm thinking this problem relates to the weak actuator spring and my atempt at overcoming this by winding the rod right in .
Any suggestions ?
This brings a few problems as the huge rush of torque with more than 10psi as you mash the throttle makes the car too hard to control - not what I want at the track.
If I drop the 'gain ' value it is more subdued early on but the boost drops off later.
Have taken to setting the overboost limit down and trying to get the controller to knock the boost down early on which allows a higher 'gain' setting and higher boost later . Less than ideal.
I'm thinking this problem relates to the weak actuator spring and my atempt at overcoming this by winding the rod right in .
Any suggestions ?
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Boosted Kiwi
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/\ yes it does but the min boost without the boost controller is 7psi so there is no room to adjust that ....
What would work is a boost controller that increases the gain value as revs go up - is there such a beast ?
What would work is a boost controller that increases the gain value as revs go up - is there such a beast ?
They have high end BC's that will let you do diff boost levels for each gear, RPM's etc...
But what I am saying; is if your start boost is set to 0 (always opening the wastegate) and you gain and set boost are higher for your goals; it should help it spool up a bit slower. Even though the WG spring is set for 7psi; it will still crack open lower (like 2-3) PSI.
But what I am saying; is if your start boost is set to 0 (always opening the wastegate) and you gain and set boost are higher for your goals; it should help it spool up a bit slower. Even though the WG spring is set for 7psi; it will still crack open lower (like 2-3) PSI.
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Boosted Kiwi
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They have high end BC's that will let you do diff boost levels for each gear, RPM's etc...
But what I am saying; is if your start boost is set to 0 (always opening the wastegate) and you gain and set boost are higher for your goals; it should help it spool up a bit slower. Even though the WG spring is set for 7psi; it will still crack open lower (like 2-3) PSI.
But what I am saying; is if your start boost is set to 0 (always opening the wastegate) and you gain and set boost are higher for your goals; it should help it spool up a bit slower. Even though the WG spring is set for 7psi; it will still crack open lower (like 2-3) PSI.
I'll try that - I've had it on 6psi and not tried to play with it because I thought it was rendered ineffective by the wg spring ......
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6psi is about the hardest hitting BC setting you can get for that WG and your target PSI of 10... no wonder you are having traction issues. Suprised your not getting boost spike too.



