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I'm going to say yes to all three points as things to do. Also make sure the Wastegate flapper has a little touch of preload holding it tightly closed.
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Originally Posted by rhysmate
(Post 1164180)
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!! |
7 Attachment(s)
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 https://www.miataturbo.net/attachmen...ine=1410190195 The screenshot above is using waste gate pressure only. this is the timing map https://www.miataturbo.net/attachmen...ine=1410190195 It's conservative as i was trying to stop the engine detonating here's target AFR https://www.miataturbo.net/attachmen...ine=1410190195 resulting fuel map https://www.miataturbo.net/attachmen...ine=1410190195 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. https://www.miataturbo.net/attachmen...ine=1410190195 https://www.miataturbo.net/attachmen...ine=1410190195 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 https://www.miataturbo.net/attachmen...ine=1410190195 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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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.miataturbo.net/attachmen...ine=1410195911 |
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. |
Originally Posted by sixshooter
(Post 1165206)
Over 200kpa on a 2870 is about 250 whp, iirc.
any thoughts on timing map? i get the feeling im too advanced up top. |
thoughts on these before i pull the trigger?
4 EV14 850cc Mazda Miata MX5 Fuel Injectors New $309 | eBay |
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) |
Originally Posted by BTMiata
(Post 1165289)
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) 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? |
Originally Posted by rhysmate
(Post 1165296)
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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Originally Posted by BTMiata
(Post 1165301)
One end plugs into the stock harness and the other goes to the injector. I guess they make all the injectors connectors uniform? I opted to get the pnp adapters for mine
Thanks for the link. i already have a man that wants my rx7 injectors for 50e :dealwithit: so that's 415 delivered to the island of Ireland! |
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This is mine. At least I don't think I've changed it since this was uploaded.
https://www.miataturbo.net/attachmen...ine=1410224783 |
Originally Posted by rhysmate
(Post 1165308)
I'm probably gonna be a cheap ass and get the free ''solder yourself ones'' :party:
Thanks for the link. i already have a man that wants my rx7 injectors for 50e :dealwithit: so that's 415 delivered to the island of Ireland! |
Originally Posted by sixshooter
(Post 1165309)
This is mine. At least I don't think I've changed it since this was uploaded.
https://www.miataturbo.net/attachmen...ine=1410224783
Originally Posted by BTMiata
(Post 1165310)
I dont blame you... the connectors aren't needed just make it easier to swap back & forth lol
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. |
Originally Posted by sixshooter
(Post 1165206)
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. I wonder if it wound be better to present pulse width in mS rather than duty cycle. |
6 Attachment(s)
Does this help at all?
https://www.miataturbo.net/attachmen...ine=1410226958 I've attached the log also It's only started doing this since i installed the bigger turbo. hence why i think plugs are the culprit |
Gap the plugs to .028 inch and you should be fine unless the coil is getting weak.
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9 Attachment(s)
Originally Posted by sixshooter
(Post 1165333)
Gap the plugs to .028 inch and you should be fine unless the coil is getting weak.
some recent pics https://www.miataturbo.net/attachmen...ine=1410277677 https://www.miataturbo.net/attachmen...ine=1410277677 https://www.miataturbo.net/attachmen...ine=1410277677 https://www.miataturbo.net/attachmen...ine=1410277677 https://www.miataturbo.net/attachmen...ine=1410277677 https://www.miataturbo.net/attachmen...ine=1410277677 https://www.miataturbo.net/attachmen...ine=1410277677 https://www.miataturbo.net/attachmen...ine=1410277677 https://www.miataturbo.net/attachmen...ine=1410277677 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! |
Nice man. Looking way better already.
Also looks like you're making some decent power with it (I'd guess somewhere in the 240-260 range) |
Looks like she has some good topend. The low end spool appears to be lacking a bit, but it sounds like you have been able to improve that a bit.
|
Originally Posted by 18psi
(Post 1165491)
Nice man. Looking way better already.
Also looks like you're making some decent power with it (I'd guess somewhere in the 240-260 range)
Originally Posted by Fireindc
(Post 1165498)
Looks like she has some good topend. The low end spool appears to be lacking a bit, but it sounds like you have been able to improve that a bit.
Next job is uprate the injectors. 400$ is a lot of money but it's gonna be worth it. hope to order them on Friday After that its rods and oem rings. full gasket kit (OEM) and ACL bearings. Aim is safe 250whp tune which i think is realistic for a daily. |
make sure you get ID or FIC injectors only. trust me, they are the best.
you can probably hit up Bryan @ FAB9 for a good deal on either. |
Originally Posted by 18psi
(Post 1165522)
make sure you get ID or FIC injectors only. trust me, they are the best.
you can probably hit up Bryan @ FAB9 for a good deal on either. |
Lift the WG actuator rod off of the arm and make sure the flapper is completely seated if you haven't already. It's ok to have a little preload on the actuator rod when it goes over the flapper arm stud.
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Originally Posted by sixshooter
(Post 1165665)
Lift the WG actuator rod off of the arm and make sure the flapper is completely seated if you haven't already. It's ok to have a little preload on the actuator rod when it goes over the flapper arm stud.
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Originally Posted by 18psi
(Post 1165522)
make sure you get ID or FIC injectors only. trust me, they are the best.
you can probably hit up Bryan @ FAB9 for a good deal on either. Eagle rods ACL bearings Supertech pistons and rings ID1000 i might skip on the pistons though. ill need a fuel pump and oil pump too just over 1000 euro delivered. time to start eating noodles for the next few weeks :party: |
Video! they arent the best but until i get an external mic..... |
Ordered
Eagle rods Cometic head gasket Id725 injectors Acl bearings (all) To buy billet Oil pump Piston rings Will supertech be ok with standard pistons? My buddy with a tuning shop managed to find me the parts so i saved on customs and shipping! |
Are you asking about supertech rings on stock pistons or supertech pistons in a stock bore diameter?
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Originally Posted by sixshooter
(Post 1168489)
Are you asking about supertech rings on stock pistons or supertech pistons in a stock bore diameter?
|
Why wouldn't you buy forged pistons as well? You get the benefit of lower compression which gives you more headroom against detonation on pump gas.
And the pistons are stronger. |
Its another 400e on top of the money ive spent and id need to order it today to get them for that. I also just biught a fuel pump and cops and i still need bottom end gaskets etc etc
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I guess i could save up and wait till later in the year
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2 Attachment(s)
Earlier on in the week i got a pretty good deal on a walbro 255 so i took it. I put in into the car today
https://www.miataturbo.net/attachmen...ine=1411247959 https://www.miataturbo.net/attachmen...ine=1411247959 I read that some people have had issues with the 255 causing rich idle and cruise. All seems well so far! Ill probably invest in an adjustable fpr as a precaution. I picked up my cops yesterday as well and im waiting on the laser cut plate to fit them. I also need a loom off a yaris or avensis or some other toyota. Anyway. I thought the "missfire" was down to the fuel pump letting go, but the issue is still there. Anyone have any thoughts on it? The log is in a few posts back and its still happening.. I thought it was the boost cut but Its not boost cut i know that |
Spark plugs need to be gapped to .028 inches?
Weak ignition coil? Dirty fuel injector? Burned (or slightly bent) valve in the head? Do a compression test for this one. |
Originally Posted by sixshooter
(Post 1169006)
Spark plugs need to be gapped to .028 inches?
Weak ignition coil? Dirty fuel injector? Burned (or slightly bent) valve in the head? Do a compression test for this one. |
I thought we were trying to diagnose a missfire. I haven't seen a log.
Are you seeing a DC drop, RPM drop, Inj PW drop, everything drop, or what? |
Originally Posted by sixshooter
(Post 1169187)
I thought we were trying to diagnose a missfire. I haven't seen a log.
Are you seeing a DC drop, RPM drop, Inj PW drop, everything drop, or what? What i've done to try and diagnose it is copy my ignition and fuel tables into a totally new msq. Ill run a log on the way to work and post it here. |
2 Attachment(s)
This has some odd things in it I don't understand. Maybe a MS guru will stop in and take a look.
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6 Attachment(s)
Originally Posted by sixshooter
(Post 1169267)
This has some odd things in it I don't understand. Maybe a MS guru will stop in and take a look.
So far i've copied my fuel and spark tables into a fresh msq to see if it was any other setting that i changed by mistake. no difference at all. I've attached a new log from today. one log was a pull in 3rd gear and the other log is a pull in 3rd plus a shift into 4th and 5th. The tune file is also attached. |
Problem solved
After reading some more about accel enrichment and mapDOT etc, i was able to correspond the map de engaging with small fluctuations in the map signal. The map threshold was too sensitive so even tiny changes in the map signal (as small as 1kpa) would engage ae. I set it higher and set decel fuel % to 100 and did some third gear pulls on the way home. Logs show no dips in pw or duty cycle anymore. Hooray! Thanks for the help as usual Sixshooter. Rhys |
Car is set to about .75 bar or there abouts. This video is crap, awful, but it shows the accleration from 20mph +
I have access to a gopro so ill get better ones :) going on the dyno next weekend |
2 Attachment(s)
I also forgot to add in the screenshot of the log with my lovely linear duty cycle :D since i fitted the new fuel pump i did some work to my fuel table and was able to reduce lots of fuel up top. so my duty cycle is now at about 75% max or there abouts. I do have some det up at 5k, but ill get it on the dyno soon.
https://www.miataturbo.net/attachmen...ine=1411681309 Picked up these today https://www.miataturbo.net/attachmen...ine=1411681284 one is for my buddy! And i got my cop pigtails so ill work on that over the weekend. |
Pardon my ignorance but those are.... knock sensors?
Been thinking about trying to get at least knock detection working on my Megasquirt. |
Originally Posted by concealer404
(Post 1170474)
Pardon my ignorance but those are.... knock sensors?
Been thinking about trying to get at least knock detection working on my Megasquirt. |
6 Attachment(s)
Today i had a day at the shed.
First job was to figure out the jobs i have left to do and little projects so i laid everything out on the floor to see what i had. https://www.miataturbo.net/attachmen...ine=1411860090 So the list,,, Retrofit factory parcel shelf brace Knock sensor Brake Stopper COP conversion loom Lower control arm replace Oil pressure sender bleed clutch Vband on DP Metal boost pipes Battery bracket adjustable droplinks catch can launch control replace turbo nuts boost control switch (toggle solenoid/wastegae actuator pressure) forge engine There's a few more little jobs i can't remember them So after i put it all on the floor i had to decide what to do first. So i sey up my welding bench while i decided https://www.miataturbo.net/attachmen...ine=1411860090 I wanted to do some welding (I need a lot of practice) so i went to work on the brake stopper https://www.miataturbo.net/attachmen...ine=1411860090 i added a bit of bracing to it https://www.miataturbo.net/attachmen...ine=1411860090 Cut off what i didnt need https://www.miataturbo.net/attachmen...ine=1411860090 done https://www.miataturbo.net/attachmen...ine=1411860090 Not a major job but i enjoyed it. it passed the time. Also sorted the launch/flat shift (Sorry about horizontal video, it wasnt me that video'd it ) -Rhys |
4 Attachment(s)
I made a start on my COP loom,
source https://www.miataturbo.net/useful-sa...writeup-12704/ It's not finished but this is what its gonna look like when it is so i'll upload these while i have the chance https://www.miataturbo.net/attachmen...ine=1412003398 https://www.miataturbo.net/attachmen...ine=1412003398 https://www.miataturbo.net/attachmen...ine=1412003398 https://www.miataturbo.net/attachmen...ine=1412003398 Almost there :) |
2 Attachment(s)
So i finished the COPS, they look exactly like the pic in the previous post. Im happy with them.
Last night i went on the dyno. First pulls we made 207 whp at .8 bar After a lot of messing with the boost control solenoid i now have a very steady 1 bar that comes on quite smooth. I'll let the chart do the talking. https://www.miataturbo.net/attachmen...ine=1413364208 https://www.miataturbo.net/attachmen...ine=1413364208 The Yellow line is on the t25 last year when it made 200whp and the green line is last night. 233whp. I'll post a log screenshot later on and my tune. I forgot my laptop at home today. Rhys |
It looks like you were making more pressure earlier last year and now the pressure rise (spool) is much slower. Are you using a different boost control method now?
|
Originally Posted by sixshooter
(Post 1175543)
It looks like you were making more pressure earlier last year and now the pressure rise (spool) is much slower. Are you using a different boost control method now?
The yellow line is the t25 and the green is the GT2871 |
5 Attachment(s)
The turbo went bang
https://www.miataturbo.net/attachmen...ine=1416320620 https://www.miataturbo.net/attachmen...ine=1416320620 https://www.miataturbo.net/attachmen...ine=1416320620 https://www.miataturbo.net/attachmen...ine=1416320620 There seems to be alot of pressure in the head as well. No idea what's going on. Maybe stem seals or the like. Anyway, it's parked for now until i can rebuild it For now ill drive this https://www.miataturbo.net/attachmen...ine=1416320620 Rhys |
When you say went bang, do you mean it actually exploded or just started leaking oil all over the place?
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Originally Posted by 18psi
(Post 1183737)
When you say went bang, do you mean it actually exploded or just started leaking oil all over the place?
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Rhys, this is disappointing!
I will be in West Cork over the new year and was planning to trash your turbo car. What about the red one? Will that be working or are you going to break that too :giggle: |
Amazing news that youre coming to Cork. Absolutely make sure we get to meet up. That would be awesome. If youre here next year theres a good chance ill have the engine rebuild! Also...the red one is planned as a winter beater so i cant promise anything :p
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9 Attachment(s)
ok.
So i did an compression test and im showing low compression on one cylinder. Also i took the turbo apart and in fairness it looks ok apart from this... https://www.miataturbo.net/attachmen...ine=1427303773 https://www.miataturbo.net/attachmen...ine=1427303773 https://www.miataturbo.net/attachmen...ine=1427303773 So im going to put it back together For now i took a spare engine off a friend to get my car back on the road https://www.miataturbo.net/attachmen...ine=1427303773 https://www.miataturbo.net/attachmen...ine=1427303773 https://www.miataturbo.net/attachmen...ine=1427303773 https://www.miataturbo.net/attachmen...ine=1427303773 https://www.miataturbo.net/attachmen...ine=1427303773 So ill be driving again soon :) i also picked these up for my daily mx5 https://www.miataturbo.net/attachmen...ine=1427303773 tis all go |
Was that split rubber line an oil drain for the turbo?
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Originally Posted by sixshooter
(Post 1218442)
Was that split rubber line an oil drain for the turbo?
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Did you know that oil is a solvent for many types of rubber? And that the fuel line is not rated for the temp of the oil draining out of a hot turbo? And that it also will not withstand the radiant heat from the turbine housing?
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Originally Posted by sixshooter
(Post 1218877)
Did you know that oil is a solvent for many types of rubber? And that the fuel line is not rated for the temp of the oil draining out of a hot turbo? And that it also will not withstand the radiant heat from the turbine housing?
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