Fireindc's attempt to build a decent miata. (the search for more torque). - Page 8 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 06-03-2013, 04:44 PM   #141
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I'm currently running a pretty similar setup to you but currently on e85, once you go e85 and a little more boost you will be loving the mid range torque increase you will be getting !
Nice! I'm going e85 soon and will run ALLOFIT on my tiny turbo. Next mod will be a 255 pump and some kind of FPR, then pour some e85 in the tank and start tuning.

How much timing should I add to the 99-00 basemap when i switch to e85 to start with? From what I've read I can probably reach MBT on e85 without knocking..
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Old 06-03-2013, 04:53 PM   #142
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e85 on a stock engine? i hope you're getting ready to build it
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Old 06-03-2013, 05:11 PM   #143
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e85 on a stock engine? i hope you're getting ready to build it
Well, I've got a few things going around. First I've sourced a spare 94 1.8 with good compression that WILL be built.. down the road. I do need this setup to last at least a year or two if possible.

Now this is my thought right now:

1) e85 is more det resistant, cooler running, probably easier on a motor if i ran the same power levels as i would on pump.

2) I live at 7k+ feet and I'm running a tiny turbo. This turbo will run out of breath at around 170 kpa at my altitude.

3) I put around 2-4k miles a year on this damn thing, and that is DDing it.. I work from home so I do not have a daily required commute, I live in a small town.

4) even on e85 if you add in my altitude I don't think I can get this thing above 250whp or 230ftlbs. I DEFINATELY cannot do that on pump gas at this altitude.

What do you think? I know at sea level i'd be asking for trouble, but at this altitude my small t25 probably wont give me the power I want without e85.. and it's readily available.

Please discuss. I'll gladly drop the idea of running e85 if my logic is off somewhere.
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Old 06-03-2013, 05:15 PM   #144
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Oh that's what you meant.

I saw you mention "allofit" and e85 and I thought you were going to aim for the stars.

But yeah, if you keep the pressure and timing within sane parameters it should definitely run safer on e85
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Old 06-03-2013, 05:20 PM   #145
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Oh that's what you meant.

I saw you mention "allofit" and e85 and I thought you were going to aim for the stars.

But yeah, if you keep the pressure and timing within sane parameters it should definitely run safer on e85
Ah yeah, "allofit" on this little turbo is probably around 14psi, I'm sure it could do a bit more but I don't want to push its efficiency. Being at altitude where my barometric pressure is a measly 77kpa, I'm already down on power quite a bit (nearly 25% in n/a form). My idea is to get up close to 250whp as I can, and I'll need e85 to get anywhere near that with my setup. I plan on turning up the boost and doing virtual dyno pulls until I'm reading somewhere around 230-240whp and leave it there. If i can get that much power.. Time will tell and I'll keep you gentlemen updated.

On a side note I've got a decent tune going, and I'll have insurance on the car today. I'll fab up a gopro mount sometime this week and get some videos of it in action. It launches so well now, it's hilarious. I love it.
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Old 06-03-2013, 08:09 PM   #146
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With my GT2554 i'm pushing 217hp @ 12psi on e85 and its pretty much at its limit so dont know how close your going to get to 230-240
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Old 06-03-2013, 08:24 PM   #147
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With Virtual Dyno, he can do a "custom factor" on his graphing. I would expect that with the correct "custom factor," he'll hit exactly 235!! LOL.
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Old 06-03-2013, 09:00 PM   #148
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With my GT2554 i'm pushing 217hp @ 12psi on e85 and its pretty much at its limit so dont know how close your going to get to 230-240
Good to know, thanks. I may need moar gt2560 to hit my goals, part of why I'm going to run ALLOFIT with this turbo and see what I get..
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Old 06-03-2013, 09:41 PM   #149
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oh snap I totally forgot you were on a 2554
Yeah its probably all but tapped out as is
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Old 06-03-2013, 11:48 PM   #150
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With Virtual Dyno, he can do a "custom factor" on his graphing. I would expect that with the correct "custom factor," he'll hit exactly 235!! LOL.
I dont know how accurate these virtual dynos are but mine was run and tuned on dyno dynamic

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Old 06-04-2013, 02:11 AM   #151
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Damn, nice curve elitee. The virtual dyno was pretty damn accurate with my actual dyno readings in the past (uncorrected readings, of course), and I've seen proof of it working VERY accurately if accurate information is given. Unfortunately i had to guess on my weight of 2400 with driver, but if anything I'm probably slightly above that which would fudge results in another diction anyways.

So the car was running like a raped ape tonight, the 2nd gear slides through turns and **** are hilarious giving it WOT at 3k rpm and sliding.

But it's definitely smoking still. It will do it randomly at a stoplight, but not always. Maybe it will smoke at a stoplight 1/6 times or less. It will smoke a little after doing some serious pulls, but I can pop the hood immediately and there is smoke coming from the CHRA and it's visibly wet- I'll get a picture but it's from the exhaust side on the CHRA. I'm wondering if I didn't **** it up somehow clocking it, I did have to use heat and a bfh. I was careful with it when it was apart, cleaned it, and put it back together carefully after clocking it. The oil drain is immaculate, I even dremeled the fittting on the inside of the pan flush after JB welding it in for maximum flow.

I'm running the big BEGI oil feed line (-4an, I'm pretty sure) and samnavy's "pop rivet" restrictor.

Anyone have any ideas? Both the motor and the turbo weren't smoking in the cars they came out of.

Edit: I'm buying a real restrictor asap.
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Old 06-04-2013, 10:22 AM   #152
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Quote:
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I dont know how accurate these virtual dynos are but mine was run and tuned on dyno dynamic
In my experience Dyno Dynamic dynos tend to read lower than a lot of other dynos.

Virtual dynos can have huge amounts of variability depending on the user. But if used correctly, they have their purpose.
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Old 06-04-2013, 10:45 AM   #153
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Quote:
Originally Posted by Efini~FC3S
In my experience Dyno Dynamic dynos tend to read lower than a lot of other dynos.
Yep, the one in town reads 15% lower than the Dynojet I used.


Nate, I say jump on the e85. You can dial in a bunch more timing and squeeze even more TQ out of it under the curve, so even if you don't net much more peak power it'll be worth it. That's my plan with the ol' GReddy kit, plus some intake cam retard.
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Old 06-04-2013, 01:41 PM   #154
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Awesome! Definately going with e85 soon - got a free walbro 255 fuel pump from a friend and I have a walbro install kit for a miata laying around. Woohoo.

Now i REALLY gotta nix this intermittent smoking issue.. It has to be the turbo, considering the turbo itself smokes a good amount from the CHRA where it meets the exhaust side after a series of hard pulls. Here is my train of though on troubleshooting this:

#1 get a real oil restrictor, instead of a ghetto pop rivet one.
#2 rebuild the bitch, the old seals that were fine before must not like having been clocked .
#3 maybe just buy a s14/s15 gt2560 and upgrade right away..
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Old 06-04-2013, 01:43 PM   #155
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I'd just upgrade. That baby 2554 is undersized for a 1.8
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Old 06-04-2013, 02:40 PM   #156
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I'm getting a real restrictor first, if it still smokes from the CHRA i'm going to upgraydeeeeeee
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Old 06-04-2013, 09:45 PM   #157
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Will the stock regulator work with a 255? Or do you already have an adjustable one?
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Old 06-04-2013, 11:40 PM   #158
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Will the stock regulator work with a 255? Or do you already have an adjustable one?
From what I've read I'll need some kind of adjustable one, as the 255 will overpower the stock fuel system.

The smoking is so intermittent on this thing, drove it today and it didn't smoke any at stoplights, stop signs, etc. Didn't smoke on decel after a few boosted pulls. Granted I wasn't really "ragging" on it, just a couple of 2-3 , 1-2 pulls around town having fun.

It starts cold 100% clean, it revs clean cold and hot, only when it starts smoking at idle when I rev it it still smokes when revving. Oh well, it didn't smoke any today..

I've got a real oil restrictor on its way instead of the ghetto fabulous pop rivet, which actually DID seem to help at least a little bit.
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Old 06-06-2013, 05:32 PM   #159
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Dirty interior shot.

I ordered a ball bearing restrictor figuring I can just drill it out to whatever size I choose. With the 99 motor, -4an feed line, and the fact that I'm still smoking from the CHRA and exhaust after extended flogging on the car (even with my pop rivet in place), what size should i drill out the restrictor on my journal bearing t25? I'm thinking like a .55
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Old 06-06-2013, 06:02 PM   #160
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You might want to start a little smaller, like .055".
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