Greddy Profec II boost controller
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From: yorba linda, ca
I do, installed by the PO, rather the PO's shop.
When I first got the car, it was all out of whack as the car would overboost rather quickly. After resetting all settings to basically default starting levels, slowly working my way up the boost limiter solved the problem.
That said, I am not certain its smart to have a boost adjuster mechanism with reach of the driver
Some experts have voiced their opinions rather strongly that these are no good, others say the opposite -- naturally, I dont know whether or not to take this thing out or not???
When I first got the car, it was all out of whack as the car would overboost rather quickly. After resetting all settings to basically default starting levels, slowly working my way up the boost limiter solved the problem.
That said, I am not certain its smart to have a boost adjuster mechanism with reach of the driver
Some experts have voiced their opinions rather strongly that these are no good, others say the opposite -- naturally, I dont know whether or not to take this thing out or not???
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From: WEST SIDE OF MPLS, MN
I had one in my 993TT (never touched it),
and now in my 996TT (Protomotive built) and I play around with it a fair bit
as the weather changes. Seems to do a fine job. I cannot argue the merits of it however,
nor would I waste my time doing so.
Good luck,
Marty
and now in my 996TT (Protomotive built) and I play around with it a fair bit
as the weather changes. Seems to do a fine job. I cannot argue the merits of it however,
nor would I waste my time doing so.
Good luck,
Marty
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From: Texas - it's a whole nuther country
I turned it to the "OFF" mode when I took it to the dealer (thought that someone would monkey with it), does this set it back to stock levels. Also are LO and HI settings are pre-set? I havne't messed with it other than this.
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Mike, sounds like you don't have the manual? Not sure what model yours is but the manual is available online at GReddy's site: http://www.greddy.com/tech/
Just scroll down to the Profec sction...
Just scroll down to the Profec sction...
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From: Texas - it's a whole nuther country
Mike, sounds like you don't have the manual? Not sure what model yours is but the manual is available online at GReddy's site: http://www.greddy.com/tech/
Just scroll down to the Profec sction...
Just scroll down to the Profec sction...
Last edited by SA Mike; May 27, 2008 at 04:44 PM.
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From: yorba linda, ca
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It's ugly, but is very simple and does its job.
If you switch it to OFF, you will be boosting at wastegate spring value (most likely 0.7 Bar).
The Lo and Hi settings are programmable to your preferences in boost, gain and set gain.
Buy a VDO boost gauge to replace the clock and useless digital gauge, make a killer deal on Woodster's AX 22 GPS datalogger for sale as it is a fantastic tool, plug it in your car, set your Profec at 25% boost, and do some runs. Later, do some small (5% max) changes to "gain" and "set gain" only and do some runs...take notes of everything and see what works best.
Once you get it right, you don't need to touch it again ever, except on and off if you want.
It took me 10 minutes.
If you switch it to OFF, you will be boosting at wastegate spring value (most likely 0.7 Bar).
The Lo and Hi settings are programmable to your preferences in boost, gain and set gain.
Buy a VDO boost gauge to replace the clock and useless digital gauge, make a killer deal on Woodster's AX 22 GPS datalogger for sale as it is a fantastic tool, plug it in your car, set your Profec at 25% boost, and do some runs. Later, do some small (5% max) changes to "gain" and "set gain" only and do some runs...take notes of everything and see what works best.
Once you get it right, you don't need to touch it again ever, except on and off if you want.
It took me 10 minutes.
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From: Texas - it's a whole nuther country
It's ugly, but is very simple and does its job.
If you switch it to OFF, you will be boosting at wastegate spring value (most likely 0.7 Bar).
The Lo and Hi settings are programmable to your preferences in boost, gain and set gain.
Buy a VDO boost gauge to replace the clock and useless digital gauge, make a killer deal on Woodster's AX 22 GPS datalogger for sale as it is a fantastic tool, plug it in your car, set your Profec at 25% boost, and do some runs. Later, do some small (5% max) changes to "gain" and "set gain" only and do some runs...take notes of everything and see what works best.
Once you get it right, you don't need to touch it again ever, except on and off if you want.
It took me 10 minutes.
If you switch it to OFF, you will be boosting at wastegate spring value (most likely 0.7 Bar).
The Lo and Hi settings are programmable to your preferences in boost, gain and set gain.
Buy a VDO boost gauge to replace the clock and useless digital gauge, make a killer deal on Woodster's AX 22 GPS datalogger for sale as it is a fantastic tool, plug it in your car, set your Profec at 25% boost, and do some runs. Later, do some small (5% max) changes to "gain" and "set gain" only and do some runs...take notes of everything and see what works best.
Once you get it right, you don't need to touch it again ever, except on and off if you want.
It took me 10 minutes.
Some? I find it vague in ALL areas
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Mike
It all depends who set it up for Alvin and how well did they do it. You need to have a proper boost gauge to make sure they did not set it up to some crazy boost levels. Once it is on, go to the Hi setting, turn the wheel **** once tick to the right to check what % it is set on...If it is anything higher than 30-35%, don't use it until you know what your boost levels are, stick to the LO mode which should be set around 15-20% or so (that's what I use)
If you know that your wastegaste springs are 0.7 Bar, then a 30% increase in boost would be 1.7 x 1.3 = 2.2bar absolute or 1.2 Bar of boost. That's why I am saying make sure it is below, just for safety by the time you test it.
It all depends who set it up for Alvin and how well did they do it. You need to have a proper boost gauge to make sure they did not set it up to some crazy boost levels. Once it is on, go to the Hi setting, turn the wheel **** once tick to the right to check what % it is set on...If it is anything higher than 30-35%, don't use it until you know what your boost levels are, stick to the LO mode which should be set around 15-20% or so (that's what I use)
If you know that your wastegaste springs are 0.7 Bar, then a 30% increase in boost would be 1.7 x 1.3 = 2.2bar absolute or 1.2 Bar of boost. That's why I am saying make sure it is below, just for safety by the time you test it.
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From: Texas - it's a whole nuther country
Mike
It all depends who set it up for Alvin and how well did they do it. You need to have a proper boost gauge to make sure they did not set it up to some crazy boost levels. Once it is on, go to the Hi setting, turn the wheel **** once tick to the right to check what % it is set on...If it is anything higher than 30-35%, don't use it until you know what your boost levels are, stick to the LO mode which should be set around 15-20% or so (that's what I use)
If you know that your wastegaste springs are 0.7 Bar, then a 30% increase in boost would be 1.7 x 1.3 = 2.2bar absolute or 1.2 Bar of boost. That's why I am saying make sure it is below, just for safety by the time you test it.
It all depends who set it up for Alvin and how well did they do it. You need to have a proper boost gauge to make sure they did not set it up to some crazy boost levels. Once it is on, go to the Hi setting, turn the wheel **** once tick to the right to check what % it is set on...If it is anything higher than 30-35%, don't use it until you know what your boost levels are, stick to the LO mode which should be set around 15-20% or so (that's what I use)
If you know that your wastegaste springs are 0.7 Bar, then a 30% increase in boost would be 1.7 x 1.3 = 2.2bar absolute or 1.2 Bar of boost. That's why I am saying make sure it is below, just for safety by the time you test it.
Last edited by SA Mike; May 30, 2008 at 03:51 PM.
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Mike don't worry too much, it is quite easy to get it right, just make sure it is not set at crazy percentages in boost.
If boost spikes (similar to the revs with a slipping clutch), it will flash in red as there is a limiter that I am sure they set up right, then you just lower the set gain setting or boost to remove the spike.. It sounds much more complicated than what it is, very very unlikely to have any kind of problem unless one is reckless.
If boost spikes (similar to the revs with a slipping clutch), it will flash in red as there is a limiter that I am sure they set up right, then you just lower the set gain setting or boost to remove the spike.. It sounds much more complicated than what it is, very very unlikely to have any kind of problem unless one is reckless.
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From: Rochester, NY, USA
I had John from Protosport put in a Greddy Profec switch in mine, hidden behind the center console, with a hand-held remote control, but the remote is on order and when it comes in for programming, I won't use it anyhow since I'll keep it on the "high" boost setting all the time.
