breaking my turbo virginity
09-04-2014, 11:45 PM
#242
Just remembered a few things as i was dropping off to sleep.
1. My waste gate actuator signal is being taken from the compressor outlet. Whereas my t25 was taking its signal from the throttle body. So first job is to relocate the current set up to before tge butterfly valve of the inlet.
2. Im using waste gate pressure only. So if i ad my ebc and set it to 100% ( ie. let it bleed air out of the signal line) until 3k or so surely that will hold the waste gate fully closed a bit longer?
3. Also any thoughts on whether adding fuel to the cells just before initial spool will help? Theory being denser exhaust gases to encourage turbine to spin faster?
Gotta be worth a few hundred rpm surely!!
1. My waste gate actuator signal is being taken from the compressor outlet. Whereas my t25 was taking its signal from the throttle body. So first job is to relocate the current set up to before tge butterfly valve of the inlet.
2. Im using waste gate pressure only. So if i ad my ebc and set it to 100% ( ie. let it bleed air out of the signal line) until 3k or so surely that will hold the waste gate fully closed a bit longer?
3. Also any thoughts on whether adding fuel to the cells just before initial spool will help? Theory being denser exhaust gases to encourage turbine to spin faster?
Gotta be worth a few hundred rpm surely!!
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09-08-2014, 11:29 AM
#243
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I've been working on this for the last few days.
There are a few issues.
1. i have a missfire causing lean afrs at 5k causing det. not good. this is more than likely the spark gap. no idea what its set to but it looks wide. i'll gap them asap
2. my injectors are struggling at full boost. i have some logs which i will add below.
3. i think in order for me to really get the most out if this turbo i need to run MOAR BOOST. i'll come back to this shortly.
1... as you can see here in this screenshot i have a miss fire
The screenshot above is using waste gate pressure only.
this is the timing map
It's conservative as i was trying to stop the engine detonating
here's target AFR
resulting fuel map
in order to try and get the turbo to spool up faster i added a boost control solenoid. im using this boost map but so far it's not made a difference. here's the boost map and below that is the screen shot from a log. same road and also third gear.
you can see the injector duty cycle dip every so often which to me indicates a miss fire. correct?
you can also see my injectors have run out of head room.(unless ive made a mistake and 'dutycycle1'' isn't injector duty?
heres that log again with boost duty
think i can push that duty up a bit and hold the waste gate longer?
the way i see it now is i have two options
Option A:
Go back to the t25 and drive it with 200RWHP and enjoy it the way it is.
Option B:
Replace the rods with these link
Run OEM pistons and rings
ev15 850cc ID Injectors
ACL Bearings
MOAR BOOST
any thoughts?
There are a few issues.
1. i have a missfire causing lean afrs at 5k causing det. not good. this is more than likely the spark gap. no idea what its set to but it looks wide. i'll gap them asap
2. my injectors are struggling at full boost. i have some logs which i will add below.
3. i think in order for me to really get the most out if this turbo i need to run MOAR BOOST. i'll come back to this shortly.
1... as you can see here in this screenshot i have a miss fire
The screenshot above is using waste gate pressure only.
this is the timing map
It's conservative as i was trying to stop the engine detonating
here's target AFR
resulting fuel map
in order to try and get the turbo to spool up faster i added a boost control solenoid. im using this boost map but so far it's not made a difference. here's the boost map and below that is the screen shot from a log. same road and also third gear.
you can see the injector duty cycle dip every so often which to me indicates a miss fire. correct?
you can also see my injectors have run out of head room.(unless ive made a mistake and 'dutycycle1'' isn't injector duty?
heres that log again with boost duty
think i can push that duty up a bit and hold the waste gate longer?
the way i see it now is i have two options
Option A:
Go back to the t25 and drive it with 200RWHP and enjoy it the way it is.
Option B:
Replace the rods with these link
Run OEM pistons and rings
ev15 850cc ID Injectors
ACL Bearings
MOAR BOOST
any thoughts?
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09-08-2014, 01:01 PM
#244
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please dont ban me for this AWFUL video but i dont have a go pro
https://www.youtube.com/watch?v=JRbo...ature=youtu.be
third gear wot at 3k
video taken on a closed road
https://www.youtube.com/watch?v=JRbo...ature=youtu.be
third gear wot at 3k
video taken on a closed road
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09-08-2014, 04:13 PM
#245
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Anything above 85 duty cycle is pretty much open all of the time.
Over 200kpa on a 2870 is about 250 whp, iirc. You may already be over the edge of what your bottom end can take with your stock 1.6. You need to be around 11.2 afr instead of 11.7 if you are pushing it that hard.
Over 200kpa on a 2870 is about 250 whp, iirc. You may already be over the edge of what your bottom end can take with your stock 1.6. You need to be around 11.2 afr instead of 11.7 if you are pushing it that hard.
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09-08-2014, 07:37 PM
#247
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thoughts on these before i pull the trigger?
4 EV14 850cc Mazda Miata MX5 Fuel Injectors New $309 | eBay
4 EV14 850cc Mazda Miata MX5 Fuel Injectors New $309 | eBay
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09-08-2014, 08:19 PM
#248
I would get FIC or ID's before I bought Five-0's ... They aren't too far off on price either
775cc FIC Mazda Miata Fuel Injector Clinic Injector Set (High-Z)
775cc FIC Mazda Miata Fuel Injector Clinic Injector Set (High-Z)
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09-08-2014, 08:32 PM
#249
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I would get FIC or ID's before I bought Five-0's ... They aren't too far off on price either
775cc FIC Mazda Miata Fuel Injector Clinic Injector Set (High-Z)
775cc FIC Mazda Miata Fuel Injector Clinic Injector Set (High-Z)
What are the adaptors they give you the option for? are they not PNP? I know they explain but they dont explain it very well. why use different plugs?
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09-08-2014, 09:05 PM
#251
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Thanks for the link. i already have a man that wants my rx7 injectors for 50e
so that's 415 delivered to the island of Ireland!
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09-08-2014, 09:22 PM
#254
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) and make sure im not detonating then if i am i'l drop some timing after 180kpa.it's all fun and games until you run out of duty cycle and have to pay dollar dollar for bigger ones.
oh the joys of being a car addict.
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09-08-2014, 09:30 PM
#255
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Anything above 85 duty cycle is pretty much open all of the time.
Over 200kpa on a 2870 is about 250 whp, iirc. You may already be over the edge of what your bottom end can take with your stock 1.6. You need to be around 11.2 afr instead of 11.7 if you are pushing it that hard.
Over 200kpa on a 2870 is about 250 whp, iirc. You may already be over the edge of what your bottom end can take with your stock 1.6. You need to be around 11.2 afr instead of 11.7 if you are pushing it that hard.
I wonder if it wound be better to present pulse width in mS rather than duty cycle.
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09-09-2014, 11:47 AM
#258
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some recent pics
realised i hadn't put up any hi res shots for ages excuse the cable ties and ghetto air filter.. also waiting on new manifold nuts. m10x1.5 is hard to find with a 14mm hex!
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