About to head to Costco for $890 OTD Michelin LTXs
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It stops nicely now. No more crunchy.
Wow, that is really a bummer about thedubshow wrote: ↑Mon Oct 28, 2019 3:29 pm Fairly large progress update but no real pics.
Rabbit fired up and ran after 8 years of down time. It idles and I just need to wizard up some intake tube. The ignition settings need some adjusting and I am very novice level in tuner studio/megasquirt. I have no real point of reference or guide book as Im in the far end of DIY homebrewing efi on an old ass motor, with no help guide for the type of trigger im using for spark. Email sent to some tuner gurus for 16v megasquirt shit.
Appointment set with an actual tuner to get it safe and driveable. Then theengine build will finally happen! All parts have been sitting for 9+ years.
Forged rods/pistons. 11.5:1 CR. Autotech cams. Head work. Bored from 82.5mm to 83.5mm.
Thewas sadly assaulted by my fucking
s over last week. While sitting in the carport the dogs got bored and decided for unknown reasons to JUMP all over my car. Scratches EVERYWHERE. Straight to the best detail some in town. $1400 for a 5 year ceramic coating and all the correction work.
but atleast the car will look great when done.
To work any kinks out since im in uncharted territory. I have no real base ignition OR fuel values/tables. I have lots of custom parts. I dont want toD Griff wrote: ↑Mon Oct 28, 2019 5:05 pmWow, that is really a bummer about thedubshow wrote: ↑Mon Oct 28, 2019 3:29 pm Fairly large progress update but no real pics.
Rabbit fired up and ran after 8 years of down time. It idles and I just need to wizard up some intake tube. The ignition settings need some adjusting and I am very novice level in tuner studio/megasquirt. I have no real point of reference or guide book as Im in the far end of DIY homebrewing efi on an old ass motor, with no help guide for the type of trigger im using for spark. Email sent to some tuner gurus for 16v megasquirt shit.
Appointment set with an actual tuner to get it safe and driveable. Then theengine build will finally happen! All parts have been sitting for 9+ years.
Forged rods/pistons. 11.5:1 CR. Autotech cams. Head work. Bored from 82.5mm to 83.5mm.
Thewas sadly assaulted by my fucking
s over last week. While sitting in the carport the dogs got bored and decided for unknown reasons to JUMP all over my car. Scratches EVERYWHERE. Straight to the best detail some in town. $1400 for a 5 year ceramic coating and all the correction work.
but atleast the car will look great when done.
s.
Why are you tuning the Rabbit prior to the build, out of curiosity?
curious is good. Ive done tons of reading on the best cluster setup options. I could also grab one from a cabriolet. They all will have different wiring and id need the pigtails to make them work. Junk yards are in short supply of these cars too.
updates on trying to get the ignition set.
1. I have a new LUK flywheel and apparently the factory timing marks for TDC and 6 BTDC are not marked/missing. It does have the special tool spots. I was able to measure from that back and get pretty close to setting my ign timing/offset in Tunerstudio. The offset worked out to around -5.5 deg to hit the mark at flywheel with light. Set back to adv table from fixed.
Issue:
Idling at about 900 rpm with afr around 14.5-15 the CLT temp gets hot too quick and under 3 mins the header starts glowing. Even with a fixed advance of 6 it quickly glows. This screams too retarded on ign. If I set the offset to 0 or even +1, cold start is near impossible and it gets pops in the intake. But at that offset range, while warm, the headers dont get red. I know glowing headers can also be a over fuel issue causing fuel to ignite in the header. The AFR is saying its lean tho at around 15, so Im ruling out too much fuel.
I will have to go back to basics and recheck fuel and everything. Im also going to set the cranking advance to 5 (down from 10). Once I get all these setting locked in, I plan to share with everyone since this is a hodgepodge of miata CAS trigger settings and using VW needed values.
I will also look into the warm up enrichment values to help with cold starting. The tables I am using to get started at the ones from spitfire which everyone says are conservative. I might scale back the fuel VE tables since its asking for around 65-70 in the idle area.
Starting point will be crank signal set to 400 rpm.
Injector dead time time set to 1ms (cant find a solid value to use for ms2)
Crank adv set to 0 or maybe 5?
thanks for outside lookin in. The ign timing factory spec is within 4-8 deg btdc, so there is a generous range for me to hit.4zilch wrote: ↑Thu Nov 21, 2019 12:29 pm Lean will cause headers to glow as well. 15:1 is pretty lean. I don't know how your tuner works, but could you target 12.5/13:1 for idle and see what happens. I know zilch about that particular engine and how sensitive they are to timing, but in my experience, a timing issue more often than not would present itself in a poorly running engine.
Stoic his fine if you need to pass emissions, but generally is a bit on the lean side of things if you’re tuning for power or drivability. Factory cars do this because the engines are pretty tame and they’ve got millions of dollars in engineering resources to tune them (and they need to pass emissions)dubshow wrote: ↑Thu Nov 21, 2019 1:20 pmthanks for outside lookin in. The ign timing factory spec is within 4-8 deg btdc, so there is a generous range for me to hit.4zilch wrote: ↑Thu Nov 21, 2019 12:29 pm Lean will cause headers to glow as well. 15:1 is pretty lean. I don't know how your tuner works, but could you target 12.5/13:1 for idle and see what happens. I know zilch about that particular engine and how sensitive they are to timing, but in my experience, a timing issue more often than not would present itself in a poorly running engine.
When it had more fuel going in to it and hitting around 13.1 at idle of 1k rpm, headers still glowed. I figured a more near 14.7 idle was desirable and have gotten mixed info.says it should be nearly stoich (14.7) or near the lean side. Guy that helped me rebuild/wire car says it should be closer to 13 at idle.
I have a target afr table and will likely set everything the 13.5 and see what happens.
ECU was actually doing exactly what it was told on targets. For some reason, with specs, the AFR target table TS make is pretty lean. Will post. Update in post below.4zilch wrote: ↑Fri Nov 22, 2019 6:59 amStoic his fine if you need to pass emissions, but generally is a bit on the lean side of things if you’re tuning for power or drivability. Factory cars do this because the engines are pretty tame and they’ve got millions of dollars in engineering resources to tune them (and they need to pass emissions)dubshow wrote: ↑Thu Nov 21, 2019 1:20 pm
thanks for outside lookin in. The ign timing factory spec is within 4-8 deg btdc, so there is a generous range for me to hit.
When it had more fuel going in to it and hitting around 13.1 at idle of 1k rpm, headers still glowed. I figured a more near 14.7 idle was desirable and have gotten mixed info.says it should be nearly stoich (14.7) or near the lean side. Guy that helped me rebuild/wire car says it should be closer to 13 at idle.
I have a target afr table and will likely set everything the 13.5 and see what happens.
Id take a look at the plugs and see if there’s any obvious conditions present - sometimes idle isn’t the best for reading plugs, but if it’s way rich or lean, itll be apparent
Target a richer mixture and retest - personally I’d go way richer than even 13:1 just to see how much things improve - review plugs and headers -
If no improvement check time again
If timing checked and still no improvement you might consider doing a cylinder leak down test and make sure it’s not a leaky exhaust valve or something weird.