MD321T Boost
15 December 2009, 10:48 AM
#1
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MD321T Boost
I'm running a MD321T and had it mapped by JGM on an ECUtek with an AVCR Boost controller.
My A setting is set at 1.6 bar which gives me 432BHP
My B setting is set at 1.4 bar.
The OFF setting also gives 1.4 bar.
Is this the lowest boost which I can get? Just my lass is going to be driving my car over xmas and I would like to give her as little power as possible
But 1.4 bar is still quite high for her!!
I haven't played with the A or B settings on the boost controller, but can I do anything with the AVCR to lower the settings? I just don't want to tinker too much with it and **** things up.
Cheers
My A setting is set at 1.6 bar which gives me 432BHP
My B setting is set at 1.4 bar.
The OFF setting also gives 1.4 bar.
Is this the lowest boost which I can get? Just my lass is going to be driving my car over xmas and I would like to give her as little power as possible
But 1.4 bar is still quite high for her!!I haven't played with the A or B settings on the boost controller, but can I do anything with the AVCR to lower the settings? I just don't want to tinker too much with it and **** things up.
Cheers
15 December 2009, 11:16 AM
#2
1.4 with it off ?
It should be running just actuator pressure (probs 1.2 bar) unless there is some boost creep on there. If it is creeping then not a lot you can do as a quick fix apart from putting some thick carpet under the accelerator pedal.
It should be running just actuator pressure (probs 1.2 bar) unless there is some boost creep on there. If it is creeping then not a lot you can do as a quick fix apart from putting some thick carpet under the accelerator pedal.
15 December 2009, 11:19 AM
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Yeah, I turned the setting to OFF on the AVCR, and went for a good few blasts. Every time I reset the peak boost reading, and each time it comes back at 1.4 bar.
I thought this was a little high, as I read the 321H runs at 0.9 bar.
How do you solve boost creep? And what actually is it? lol.
Thanks a lot
I thought this was a little high, as I read the 321H runs at 0.9 bar.
How do you solve boost creep? And what actually is it? lol.
Thanks a lot
15 December 2009, 11:42 AM
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Oh right. I can't do that by Friday!! lol
I did have to adjust the actuator actually! The wastegate was rattling (the penny washer). So I adjusted the actuator to give more pressure on it to stop the rattle....which it did. Nothing seemed to change boost wise. I un-screwed the actuator arm about half a turn.
Could this be causing the extra boost?
On my 'A' setting it is boosting fine.
I did have to adjust the actuator actually! The wastegate was rattling (the penny washer). So I adjusted the actuator to give more pressure on it to stop the rattle....which it did. Nothing seemed to change boost wise. I un-screwed the actuator arm about half a turn.
Could this be causing the extra boost?
On my 'A' setting it is boosting fine.
15 December 2009, 12:24 PM
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So may be worth trying to put it back to how it was when it rattled, then see what the boost is.
Either way, it doesn't sound like I can get it perfect. As the rattle was so annoying, and it's got too much boost on the off setting. Think I'd rather no rattle though to be honest!
Thanks a lot
Either way, it doesn't sound like I can get it perfect. As the rattle was so annoying, and it's got too much boost on the off setting. Think I'd rather no rattle though to be honest!
Thanks a lot
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15 December 2009, 12:55 PM
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Also the DC's are set to the tightened actuator, if you loosen it off it might not make target boost
15 December 2009, 04:55 PM
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Is that on the AVCR you mean?
JGM did say about knocking the duty cycle down if it over-boosts when it's cold weather.
Could I knock this real far down to say 1 bar on the AVCR or would things start to break?
JGM did say about knocking the duty cycle down if it over-boosts when it's cold weather.
Could I knock this real far down to say 1 bar on the AVCR or would things start to break?
15 December 2009, 09:39 PM
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I have never seen a 321 with traditional boost creap.. it might creap if you try and run actuator pressure at the top of the rpm.. but then ask it for 1.4bar flat with a flat boost duty and it just does it.. forget how many cars with 321T, 321H, 321V, 321S I have done and never seen one actually creap once asking it for boost, only the occasional when asked for actuator pressure.. which you are unlikely to want to run tbh.
Yes exhaust design and flow will effect creap
Simon
Yes exhaust design and flow will effect creap
Simon
15 December 2009, 09:51 PM
#22
I have never seen a 321 with traditional boost creap.. it might creap if you try and run actuator pressure at the top of the rpm.. but then ask it for 1.4bar flat with a flat boost duty and it just does it.. forget how many cars with 321T, 321H, 321V, 321S I have done and never seen one actually creap once asking it for boost, only the occasional when asked for actuator pressure.. which you are unlikely to want to run tbh.
Yes exhaust design and flow will effect creap
Simon
Yes exhaust design and flow will effect creap
Simon
16 December 2009, 08:51 AM
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Thanks for all the replies guys.
It's not the end of the world, as I have never run the AVCR on setting B or OFF to be honest. Was just going to run it on that in the snow, but not to worry
It's not the end of the world, as I have never run the AVCR on setting B or OFF to be honest. Was just going to run it on that in the snow, but not to worry
16 December 2009, 01:30 PM
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Yeah, the safest option will be not to let her, but it's going to be a loooooooooooong drive, so I may have to hand the reigns to her unfortunately!!
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