Built 13b hard cough under boost. Video
#1
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Built 13b hard cough under boost. Video
Here is the problem
I have another thread but feel this section may be much more suitable, here is a link to the original thread if you feel you have a solution someone else hasnt already offered. Im not shrugging off anyones suggestions im just looking at ALL the info presented to me before i go spending money.
https://www.rx7club.com/rx-7-audio-v.../#post11359336
Thanks everyone for all the support!
I have another thread but feel this section may be much more suitable, here is a link to the original thread if you feel you have a solution someone else hasnt already offered. Im not shrugging off anyones suggestions im just looking at ALL the info presented to me before i go spending money.
https://www.rx7club.com/rx-7-audio-v.../#post11359336
Thanks everyone for all the support!
#3
Sharp Claws
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sounds like boost cut in your EMS.
some electronic boost controllers will give a similar symptom if you reach the boost threshold and have a large step in the warning % set. Greddy Bspec2 comes to mind and have something rediculous set like 25%+ in the warning setting. it will basically clap your wastegate wide open and dump all boost if set too high.
basically you are overshooting your target boost level settings, either due to the wastegate hooked up improperly or your boost settings set too high, or boost cut level set too low and you have surpassed it.
more info on your setup would be very helpful.
some electronic boost controllers will give a similar symptom if you reach the boost threshold and have a large step in the warning % set. Greddy Bspec2 comes to mind and have something rediculous set like 25%+ in the warning setting. it will basically clap your wastegate wide open and dump all boost if set too high.
basically you are overshooting your target boost level settings, either due to the wastegate hooked up improperly or your boost settings set too high, or boost cut level set too low and you have surpassed it.
more info on your setup would be very helpful.
Last edited by RotaryEvolution; 02-02-13 at 05:35 PM.
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It doesnt happen everytime, mostly at wot though. Before it was happening higher in the powerband, say around 7k. Now its a bit more sperradic but settles right around 4500 for the most part. Feathering it helps.
Possible in a limp mode (?) since im test driving it without some sensors (oil press, water level sensor) My commander is at 7800 cut. No EBC for setting gain/boost or anything.
I will do the plugs and get everything hooked in nicely to avoid spending money i dont have to.
Mods are all in sig except; 340lph aero pump, Kg fuel rail, fuel lab fpr@40 idle, full 3' exhaust with a twinscroll mani and divided turbo on a .84 hotside.
Possible in a limp mode (?) since im test driving it without some sensors (oil press, water level sensor) My commander is at 7800 cut. No EBC for setting gain/boost or anything.
I will do the plugs and get everything hooked in nicely to avoid spending money i dont have to.
Mods are all in sig except; 340lph aero pump, Kg fuel rail, fuel lab fpr@40 idle, full 3' exhaust with a twinscroll mani and divided turbo on a .84 hotside.
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Earlier that week, the problem happened much less but got progressively worse.
The broken power band makes me cry
Fd rx7 hard pull - YouTube
The broken power band makes me cry
Fd rx7 hard pull - YouTube
#6
1.3L piston eater
i wouldn't be flooring it like that lol it sounds like leaning out and hitting fuel or boost cut for sure.
Do you have a wideband? Is it leaning out or going full rich? who tuned it?
Do you have a wideband? Is it leaning out or going full rich? who tuned it?
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#8
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I've had quite a few cars with quite a few turbos for each one so I understand how boost fluctuates. Ill look at the commander to see if it is set at a specific cut though, thanks for the advice.
It's running off a power fc commander. No wide band yet
It's running off a power fc commander. No wide band yet
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I only saw a boost option to change a percent and their are 4 for sec and pri, you can text me if you think your onto the answer and itd be easier for you. 8134825048
Last edited by dream3rdgen; 02-04-13 at 05:37 PM.
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