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#1182
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Speaking of 100A alts.... Subaru H6 engines have 100A alts that are internally regulated and are piece of cake to remove.
Product Detail - 12289 MIIIA3TB Reman Alternator | Remy
#1184
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if the electical system demands are the same, the bigger alternator will not consume any more HP. just because it's 100A doesn't mean it produces 100A all the time - only when the voltage regulator tells it to.
more weight, yes, unfortunately.
more weight, yes, unfortunately.
#1186
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Well, my jeep is waiting on new pads after one of the front pad wore down to the metal (apparently the squeal wear indicator was missing from those cheap *** pads). So I grabbed the Jeep battery, put it in the miata - and lo and behold, all driveability and stalling issues disappear. I test the miata battery only to find out its basically discharging on its own (!), meaning it most likely has a dead cell. Still on warranty - just gotta wait for Pep Boys to get the replacement from their warehouse.
With the Jeep battery I went out for some tuning/pulls.
Good news! Still spinning 3rd gear, despite it being summer. The bad news is that it looks like I need a new fuel filter. You know how they say you should change your fuel filter after 100 miles of E85? Well, I guess its 100% true. I'm at about 140 miles on E85 and fuel pressure drops like a rock in boost. Voltage is solid so its either the fuel pump dying or clogged fuel filter. Fuel pressure sensor is BALLER!
Observe. Fuel pressure is displayed as [fuel pressure] - [boost pressure], to get accurate fuel pressure differential at the injectors.
With the Jeep battery I went out for some tuning/pulls.
Good news! Still spinning 3rd gear, despite it being summer. The bad news is that it looks like I need a new fuel filter. You know how they say you should change your fuel filter after 100 miles of E85? Well, I guess its 100% true. I'm at about 140 miles on E85 and fuel pressure drops like a rock in boost. Voltage is solid so its either the fuel pump dying or clogged fuel filter. Fuel pressure sensor is BALLER!
Observe. Fuel pressure is displayed as [fuel pressure] - [boost pressure], to get accurate fuel pressure differential at the injectors.
#1187
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Virtual dyno puts the above pull (23-22psi) at 324ft/lbs tq. My 400whp dyno was at 326ft/lbs - at 26psi.
Even with the plugged filter and shitty AFRs (i'm targeting 12.2 in boost - because E85) the car still makes boat loads of power.
Compared to a pull last week at different boost and AFRs
Even with the plugged filter and shitty AFRs (i'm targeting 12.2 in boost - because E85) the car still makes boat loads of power.
Compared to a pull last week at different boost and AFRs
#1190
Damn that EFR spools fast. Still old GT2871 seems to keep up surprisingly well if you compare boost levels between those two. Although I believe it’s due my Ign timing: http://www.miata.fi/kuvat/e85timingm.gif
Last edited by muoto; 07-04-2013 at 04:00 AM.
#1191
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Virtual dyno puts the above pull (23-22psi) at 324ft/lbs tq. My 400whp dyno was at 326ft/lbs - at 26psi.
Even with the plugged filter and shitty AFRs (i'm targeting 12.2 in boost - because E85) the car still makes boat loads of power.
Compared to a pull last week at different boost and AFRs
Even with the plugged filter and shitty AFRs (i'm targeting 12.2 in boost - because E85) the car still makes boat loads of power.
Compared to a pull last week at different boost and AFRs
1) Have you tried the HP/TQ dyno output from Tunerstudio beta if so I'm wondering how well it compares to Virtual Dyno.
If you've not, it's a function on the tunerstudio beta's that add's HP/TQ estimation into a datalog, it uses all the inputs from the MS plus whatever additional data you can add Cod, frontal area, gearing, GPS if you have it etc.
2) Is that run to redline? I notice your knock events go to 100% but on that screengrab they don't look to be much higher than 30%? On my car above 4.5 - 5k they almost flatline, I've had to reduce the gain to the absolute minimum to stop them flatlining, but I'm worried now that I just won't pick up any lighter knock events.
I'm using the OEM MK2.5 resonant sensor, is that the same sensor you are using?
#1192
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muoto, Don't you have an NB? And its heavier and all... I actually know my car's exact weight.
I use a Bosch knock sensor with ms3 knock board. I think its pretty much useless. The values go to 100% because I set the min/max in MegaLogViewer. My knock readings *always* look like that and I think its just valvetrain noise. I also have it set on lowest gain possible.
That pull wasnt to redline because there was too much traffic and I was afraid of attracting police attention
I haven't checked megasquirt's torque thing, but virtual dyno has been very very very accurate compared to dynojet.
I use a Bosch knock sensor with ms3 knock board. I think its pretty much useless. The values go to 100% because I set the min/max in MegaLogViewer. My knock readings *always* look like that and I think its just valvetrain noise. I also have it set on lowest gain possible.
That pull wasnt to redline because there was too much traffic and I was afraid of attracting police attention
I haven't checked megasquirt's torque thing, but virtual dyno has been very very very accurate compared to dynojet.
#1193
It is very accurate! Last time when I played it in local Dyno Dynamics dyno. Results were 3-5% close each other. DD gave 284whp and after that virtual dyno 287whp (these with old GT2560)
#1198
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muoto, Don't you have an NB? And its heavier and all... I actually know my car's exact weight.
I use a Bosch knock sensor with ms3 knock board. I think its pretty much useless. The values go to 100% because I set the min/max in MegaLogViewer. My knock readings *always* look like that and I think its just valvetrain noise. I also have it set on lowest gain possible.
I use a Bosch knock sensor with ms3 knock board. I think its pretty much useless. The values go to 100% because I set the min/max in MegaLogViewer. My knock readings *always* look like that and I think its just valvetrain noise. I also have it set on lowest gain possible.
Have you played with the knock windowing? I we - as in the MX5/miata community - need to nail that to reduce the amount of external noise picked up. It's good to know that I don't just have a faulty engine or anything though, so thanks.
I haven't checked megasquirt's torque thing, but virtual dyno has been very very very accurate compared to dynojet.
#1199
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You think MS3's knock sensing is useless, or that sensor isn't much use?
Have you played with the knock windowing? I we - as in the MX5/miata community - need to nail that to reduce the amount of external noise picked up. It's good to know that I don't just have a faulty engine or anything though, so thanks.
I'd heard it was very accurate, that's why I wondered how it compared to TunerStudio's version. It's nice only running 1 program rather than two
Have you played with the knock windowing? I we - as in the MX5/miata community - need to nail that to reduce the amount of external noise picked up. It's good to know that I don't just have a faulty engine or anything though, so thanks.
I'd heard it was very accurate, that's why I wondered how it compared to TunerStudio's version. It's nice only running 1 program rather than two