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Old 01-21-2016, 09:47 PM   #401
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Stock is 1:1 against manifold pressure, so extra pound of fuel for every pound of boost against the seat of the injector. It would take 30 pounds of boost for a stock regulator to ever see that. At that point I bet the stock rail is too small anyway.

I have heard of stock regulators ripping diaphragms and leaking fuel, but old aids cars would run 90 pounds of injector pressure which means the diaphragm will hold it, but for how long? A RRFPR car would only load the stock diaphragm so hard momentarily, and while there's lots of fuel flow and not much actual flow through the return... If I try and run 70 psi at idle, it has to shunt nearly everything the pump makes.

I still think I'll try this regulator with the stock one in place, then if I can hold low enough injector pulsewidth to idle not rich I'll order that adapter and remove the stock one, it's kinda redundant anyway and just an extra failure point. Plus data on the adapter, too!
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Old 01-21-2016, 10:27 PM   #402
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I have that adapter. I'll be installing it soon.

Stop pimping out, your car doesn't deserve it
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Old 01-25-2016, 04:39 PM   #403
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So i installed the billies last night, I trimmed the bumpstops they came with down a bit, from 60mm to 35mm or so. At 5.25"f 5.5"r heights I only have 3/4" of compression out back and probably 1.5" at most up front, till I'm on the stops. I wonder if this is why Ben thought they were blown? Trying to go this low or near it with the stock length speedthane bumpstops wouldn't work for sure.

I was running more like 4.5/5.0 pinch weld height, so I am still higher than I'd like to be. I'd also like to find some tender or helper springs to take up the droop I've lost, need around 2" or so. I was hoping I could use the riceland coils, they are around 100-150# and would be perfect if they were 2.5 instead of 2.25"...

It's oversteer city at the moment, I think nearly resting on the rear stops is probably doing that, hopefully. I installed 550/300 rates for now, more rear springrate means more oversteer, right? Still have stock 1990 miata rear sway installed too.

Ricelands are blown, no big surprise. The shafts never do the same thing twice, push it in and it will jump back out 1/2" real quick before actually doing any damping...
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Old 01-25-2016, 07:28 PM   #404
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What front bar is in the car?
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Old 01-25-2016, 08:17 PM   #405
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Stock front bar still, need radiator fans and na8 brackets I think.
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Old 01-26-2016, 04:49 PM   #406
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With my car when I went to the big RB front bar (HD mounts and metal spacer mounts) and removed the rear bar, it felt great on the autocross course. On the street I liked having the stock rear bar in the car.

I am on a similar setup as you with Ground Control 440 in/lbs front and 300 in/lbs rear on Bilstein HDs. I am at about 4" and 4.25" ride height and a bit above 1900lbs.
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Old 01-26-2016, 05:04 PM   #407
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Are you running NB top hats, or any drop hats? I don't see how I can go any lower without that or shorter shocks. Bilstein HDs are NA length, right?

Lots of the droop travel of my suspension and shocks are wasted by the short springs. I wonder if the extra compression would be worth the trouble.
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Old 01-27-2016, 07:38 AM   #408
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Quote:
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Are you running NB top hats, or any drop hats? I don't see how I can go any lower without that or shorter shocks. Bilstein HDs are NA length, right?

Lots of the droop travel of my suspension and shocks are wasted by the short springs. I wonder if the extra compression would be worth the trouble.
I am running NB top hats, but I plan on making my own ISC style of tophat soon. I am on bumpstop often with this setup, but they are the small Factcat bumpstops. I believe the HDs were for the NB as well. The car feels neutral but it's still not what I like honestly. Shock travel is limited and the only way to really fix it is extended tophats or raising the car up.
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Old 01-27-2016, 11:07 PM   #409
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I get a loud bang that sounds like my muffler wanting to come through the trunk floor, I think it's from hitting the rear stops hard. There's a bump coming out of a right hand corner I can hit them on pretty regularly.

Must mean I'm riding on them regularly, I think I might try and make some tophats too.
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Old 01-27-2016, 11:08 PM   #410
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Drop hats are a must. Standard is 1" in front 1.5" in the rear. Very easy to make too.
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Old 01-28-2016, 06:05 PM   #411
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Did some things this afternoon.

Took my hood off and bent the lock tabs out of the way, now I can do this.



Removed the washer fluid bottle, moved the catch can, and installed AFPR. Set to 70 PSI with vac, think I might back it off to 70 pounds at atmospheric. Garage smells like corn from idling, good times.



Going to try and change reqfuel and see what autotune does for the rest.

Thanks Aidan!
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Old 01-29-2016, 04:49 AM   #412
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Late night tuning...

GT500 injectors are 727cc at 58psi/4.0bar base pressure, what I have set now. That should put me somewhere around 85% duty at rod bending levels. Still not sure why I get VE values so high, so I tried something new. 727cc and 9.7AFR for e85 gives 5.5 for a reqfuel value.

Anyway, that's higher than the 4.4 I was using previously, so all my VE values are down. If I use 14.7afr and 727cc I get 3.7 as reqfuel from the calculator. Using that I was getting values up above 230 before peak torque even, so that's no good.

These injectors seem to love more pressure though, and it doesn't seem to phase the deadtime as I haven't even changed that yet. All this messing around with reqfuel values had me idling all over the place, if anything this has made the injectors more linear down low and I can idle ridiculous values like 17.0 rather smooth.

So I might bump the pressure again 5.0 bar, it might just make things even smoother since I can still idle lean apparently. ~800cc of flow should make for nearly 350whp on corn at 80% lol, I'd never have to change anything fuel related again. So, I don't really want to waste time tuning this pressure, I think I'll rough tune pig rich and put a camera on the fuel pressure gauge, see if my fuel pump can keep up as is...
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Old 01-29-2016, 05:23 AM   #413
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Why target 9.5.
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Old 01-29-2016, 05:30 AM   #414
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Quote:
Originally Posted by aidandj View Post
Why target 9.5.
Saw this earlier. Putting my MTX-L in tomorrow.

Petrol 14.7:1
Diesel 14.6:1
Methanol 6.4:1
Ethanol 9:1
LPG 15.5:1
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Old 01-29-2016, 05:31 AM   #415
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Sensors outputs in lamda. So the sensor controller already does that conversion from lamda to AFR as is 14.7 is stoic for both fuels.

Last edited by aidandj; 01-29-2016 at 10:17 AM.
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Old 01-29-2016, 09:53 AM   #416
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I never understand why people do the stupid conversion and confuse themselves all the time.

the wideband doesn't output any different. like aidan said
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Old 01-29-2016, 10:00 AM   #417
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Quote:
Originally Posted by deezums View Post
Late night tuning...

GT500 injectors are 727cc at 58psi/4.0bar base pressure, what I have set now. That should put me somewhere around 85% duty at rod bending levels. Still not sure why I get VE values so high, so I tried something new. 727cc and 9.7AFR for e85 gives 5.5 for a reqfuel value.

Anyway, that's higher than the 4.4 I was using previously, so all my VE values are down. If I use 14.7afr and 727cc I get 3.7 as reqfuel from the calculator. Using that I was getting values up above 230 before peak torque even, so that's no good.

These injectors seem to love more pressure though, and it doesn't seem to phase the deadtime as I haven't even changed that yet. All this messing around with reqfuel values had me idling all over the place, if anything this has made the injectors more linear down low and I can idle ridiculous values like 17.0 rather smooth.

So I might bump the pressure again 5.0 bar, it might just make things even smoother since I can still idle lean apparently. ~800cc of flow should make for nearly 350whp on corn at 80% lol, I'd never have to change anything fuel related again. So, I don't really want to waste time tuning this pressure, I think I'll rough tune pig rich and put a camera on the fuel pressure gauge, see if my fuel pump can keep up as is...
$20 ebay pressure transducers. Log with megasquirt or arduino
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Old 01-29-2016, 02:06 PM   #418
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$20 ebay pressure transducers. Log with megasquirt or arduino
fuking engineers....
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Old 01-29-2016, 02:07 PM   #419
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fuking engineers....
Real data, instead of silly pictures.
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Old 01-29-2016, 02:16 PM   #420
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I don't need or care for real data, though i guess I can at least install a NPT sensor easy enough. You underestimate the cheapness, though.

I have no idea how I'd install the cheap flex sensor on NA fuel junk, cheaply, so I didn't.

Like I said, only reason I used E85 stoic in the reqfuel calculator is to get my VE values down. Although, if I'm not mistaken I should be able to redo reqfuel at 14.7 and run the map as is tuned for gasoline...

All my AFR targets are still the same in megasquirt, shifted little bits for e85. There's no wacky conversion going on, just in the reqfuel calculator.

Shouldn't have brought it up, still for the life of me can't figure why it confuses everyone so.
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