Boost 2.5 WRX Hawk 1.55 BAR
#1
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Join Date: Feb 2016
Location: Cumbria
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Boost 2.5 WRX Hawk 1.55 BAR
Hi, I have a car with MDX321T, RCM Headers, Forged 2.5 SCDB, AVCS, RCM Induction kit, currently on TMIC with standard mapped ecu but getting mapped on FMIC on 6th May. Power was v420/420 on Toyo Sport headers at 1.4 bar, however turbo always wants to go past that and gives fuel cut, wastegate open etc, even with a !Removed! on ignition to reduce temps due to FMIC. Do you guys think it will run at 1.55/1.6 bar to reduce the overshoot on standard ecu? p.s the overshoot happens more with RCM headers. Is syveccs only option?
#4
Scooby Regular
Mines running 1.7 bar on stock ecu, on a Owen Development SC42HTA
No issues,
2003 uk sti
Should run 1.5 no problem, to go above you need a JDM Spec C MAP sensor to allow you the extra headroom.
Sure syvecs is better no doubt,
but a decent mapper should have you running 1.5 no problem.
No issues,
2003 uk sti
Should run 1.5 no problem, to go above you need a JDM Spec C MAP sensor to allow you the extra headroom.
Sure syvecs is better no doubt,
but a decent mapper should have you running 1.5 no problem.
Last edited by SmurfyBhoy; 29 April 2016 at 09:07 AM.
#5
Scooby Regular
It's not the boost level thats the issue.
#6
Scooby Regular
What is the issue then ?
As it's almost same spec as i have with zero issues,
RCM Headers,
HDI Frountmount
AVCS, RCM Induction,
3 ports solenoid SWRD
Mapped on ECUtek by A.Forrest,
Although mines is a Stock 2.0
As it's almost same spec as i have with zero issues,
RCM Headers,
HDI Frountmount
AVCS, RCM Induction,
3 ports solenoid SWRD
Mapped on ECUtek by A.Forrest,
Although mines is a Stock 2.0
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#10
Scooby Regular
Absolutely I agree car most cars will work BETTER on aftermarket ECU for sure.
As I say mine runs well no issues so I have no real need for it,
The above however doesn't seem to be working very well at all by the sounds of it,
I was pointing out that it is possible to have it working correctly at that level on stock ecu without the issues he has.
At least is is in my case,
As I say mine runs well no issues so I have no real need for it,
The above however doesn't seem to be working very well at all by the sounds of it,
I was pointing out that it is possible to have it working correctly at that level on stock ecu without the issues he has.
At least is is in my case,
#13
Scooby Regular
iTrader: (31)
Mines running 1.7 bar on stock ecu, on a Owen Development SC42HTA
No issues,
2003 uk sti
Should run 1.5 no problem, to go above you need a JDM Spec C MAP sensor to allow you the extra headroom.
Sure syvecs is better no doubt,
but a decent mapper should have you running 1.5 no problem.
No issues,
2003 uk sti
Should run 1.5 no problem, to go above you need a JDM Spec C MAP sensor to allow you the extra headroom.
Sure syvecs is better no doubt,
but a decent mapper should have you running 1.5 no problem.
#14
Scooby Regular
Nope sorry,
Thats going by my gauge in car and what Andy F says,
Im actually just learning how to use rom raider,
So if i have my cable at the weekend
could i use that to get a boost graph ?
Or is that all gained during a Dyno run
Thats going by my gauge in car and what Andy F says,
Im actually just learning how to use rom raider,
So if i have my cable at the weekend
could i use that to get a boost graph ?
Or is that all gained during a Dyno run
#15
Scooby Regular
iTrader: (3)
yes you can log engine speed, throttle position sensor, gear, vehicle speed and manifold relative pressure (DIRECT) psi and you should see how much boost your making in each gear and at how much throttle.
at 1.7 bar your probably on the upper limit of what the standard MAP sensor can give you so your fuel cut limit will be tight or off entirely.
at 1.7 bar your probably on the upper limit of what the standard MAP sensor can give you so your fuel cut limit will be tight or off entirely.
#16
Scooby Regular
yes you can log engine speed, throttle position sensor, gear, vehicle speed and manifold relative pressure (DIRECT) psi and you should see how much boost your making in each gear and at how much throttle.
at 1.7 bar your probably on the upper limit of what the standard MAP sensor can give you so your fuel cut limit will be tight or off entirely.
at 1.7 bar your probably on the upper limit of what the standard MAP sensor can give you so your fuel cut limit will be tight or off entirely.
He did say it wouldn't read correctly on the log tho as he scaled it or sumthing would that be right,
i go by gauge in car anyway
#17
Scooby Regular
iTrader: (3)
yes that's right, you have to rescale everything in the car as even with the 3 bar map sensor from the spec C the ECU has trouble addressing a value higher than 24. By shifting the scale of the MAP sensor the car reads a different ambient pressure (so you can shift what the car thinks is 14.7 to be higher or lower) - this will give you sufficient headroom to manage the boost in the ECU as well as allowing for proper fuel cut to work.
#18
Scooby Regular
I get you,
Would be able to work it out if i manage to log it correctly,
Yea, that's why Andy wouldn't go higher without the map sensor, wanted to keep all the stock safety features.
Would be able to work it out if i manage to log it correctly,
Yea, that's why Andy wouldn't go higher without the map sensor, wanted to keep all the stock safety features.
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