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Old 09-05-2010, 01:55 PM   #1326
john 1badSTI
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on e85@ 30psi--spinning

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it depends on how much boost you want to run,if it were me I would add another 044 just for ease of mind.good luck wayno
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Old 09-05-2010, 02:05 PM   #1327
waynoSTI
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Thx John, how many mile on average do you get to a tank of gas like 2-250?

There's only one station that sells it and it's like 2hrs away, so im trying to see how long it would last if i got a 45gal drum per trip...
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Old 09-05-2010, 02:51 PM   #1328
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Originally Posted by Superorb View Post
What you MEAN to ask is how much CFM can my turbo flow on 850cc injectors and e85 and then look at compressor maps to find a turbo that fits. I have a feeling that you'll max out 850cc's pretty fast unless you've got a stock 2.0 motor. Please fill out your profile so we know your car and location.
its a 2004 sti . I'm at 1300' . Wichita kansas. I know a big turbo like a gt35r would be out of the picture but I was thinking maybe I could get by with a 20g and not max out my injectors .

I have the vf39 right now on e85 and not happy with my track #s . Only running [email protected] with a 1.65 60' . Dyno was 305whp and 355-60wtq .
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Old 09-05-2010, 06:36 PM   #1329
john 1badSTI
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on e85@ 30psi--spinning

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Quote:
Originally Posted by waynoSTI View Post
Thx John, how many mile on average do you get to a tank of gas like 2-250?

There's only one station that sells it and it's like 2hrs away, so im trying to see how long it would last if i got a 45gal drum per trip...
I would have to say if I stay out of boost probably between 200-220 per tank.
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Old 09-05-2010, 06:38 PM   #1330
NaiveRapture
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On the stock snail running 24psi (335hp/390tq) I get about 200 per tank, a little less if I'm driving like an arsehole haha. Even on the freeway I only get about 14.5-15.0 MPG
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Old 09-05-2010, 06:41 PM   #1331
john 1badSTI
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^^^It also has to do with the tune,I shoot for 14.7 to 15.0 for cruising and about 36-37 degrees timing to get optimum fuel mileage.
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Old 09-05-2010, 07:03 PM   #1332
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i get 210-230 a tank, when i do the math its 16.5-18.0 mpg thats about 60% city 40% highway or so. also i cant run any leaner than 14.7, well i can but that requires changing the values of the oxygen sensor, but im running SD so its not the same as maf
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Old 09-05-2010, 07:36 PM   #1333
john 1badSTI
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on e85@ 30psi--spinning

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I am on a hydra so its easy to do.
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Old 09-05-2010, 07:43 PM   #1334
waynoSTI
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Thx for the info John, how much were you getting on pump on that setup?
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Old 09-05-2010, 07:52 PM   #1335
john 1badSTI
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I never really got to dyno it or run it at the track with this setup on pump.Before this set-up with a stock sleeved block on a std pte 3582r it put down 540 on 93 @24psi on a dynapack dyno.The new setup is sleeved oringed block with the same heads and cams but with an hta86 turbo and id2200's.
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Old 09-05-2010, 11:11 PM   #1336
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Quote:
Originally Posted by 02RexWI View Post
Has anyone on here played around with the stock ECU to get it to start better on cold days? I went to start my car this morning @ ~48* F and it took a couple tries to get it to start... almost didn't make it to work on time. I assume I've gotta make the injector pulse width smaller at startup since its usually super rich when it starts until the o2 sensor warms up.
i also have experienced this issue on the stock ecu just recently since the temps have started to cool off at night. i have to give it 2 tries every once in a while, and i usually am rich right after startup for about 15-20seconds. after that it runs great, but i haven't really tried to play with anything yet.
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Old 09-05-2010, 11:20 PM   #1337
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Please update me if you figure out whats causing it... i might try gapping the plugs down to see if it has any effect
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Old 09-05-2010, 11:33 PM   #1338
john 1badSTI
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on e85@ 30psi--spinning

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no I would have to say either the start prime circuit or cranking enrichment at colder temps needs to be richened up.I will look at some stock roms and post some more info.
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Old 09-05-2010, 11:39 PM   #1339
john 1badSTI
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on e85@ 30psi--spinning

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just looked and there are warmup enrichment maps but you have to have developer level experience to veiw and adjust them so be careful what you change if you are not certain what it will do. good luck
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Old 09-06-2010, 12:36 AM   #1340
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I just did an airboy dyno on my sti and it shows me making 335hp and 390tq . My problem is that the manifold relative pressure was only hitting 18.43psi from 3200-5500rpms holding the entire time . But my boost gauge is reading over 25psi? Which one should I believe?
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Old 09-06-2010, 12:41 AM   #1341
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Quote:
Originally Posted by wichitalegacy View Post
I just did an airboy dyno on my sti and it shows me making 335hp and 390tq . My problem is that the manifold relative pressure was only hitting 18.43psi from 3200-5500rpms holding the entire time . But my boost gauge is reading over 25psi? Which one should I believe?
What are you using to log? You need to log Manifold Relative pressure corrected

So....... believe the gauge
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Old 09-06-2010, 12:42 AM   #1342
amalgrover
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if we are already having an issue of being too rich just after starting, wouldn't richening up the cranking enrichment make things worse?
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Old 09-06-2010, 12:45 AM   #1343
john 1badSTI
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on e85@ 30psi--spinning

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no not necessarily I was always taught that a slightly rich car will usually start where a lean one will not,also the afterstart enrichment is different than the priming and cranking enrichment settings.Also remember as outside temps start to dop as we go into fall e85 usuallt needs a lot more fuel to start efficiently within a short amount of time preferably 3-5 seconds of cranking.
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Old 09-06-2010, 12:54 AM   #1344
amalgrover
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how much should i richen them up by at a time to start off with? i mean, should i just start with 1.0 or should i start smaller with something like 0.1? Obviously, there isn't a magic number you can give me, but I am trying to find out a safe number to start increasing by each time so that i am not switching maps 30 times just to nail this problem down.
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Old 09-06-2010, 01:00 AM   #1345
john 1badSTI
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on e85@ 30psi--spinning

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you could start with .2-.3 but your injector size will also determine how much of a jump you should make at first.what size are you running and I might be able to make a better guess and do you have a wb to see what the afr is while cranking?
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Old 09-06-2010, 02:35 AM   #1346
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What are you using to log? You need to log Manifold Relative pressure corrected

So....... believe the gauge

lol, My bad . I logged it again using the corrected . I am only hitting 21 for about 1k rpms and then it drops off quickly after that. I'm guessing I have a boost leak or a pre turbo exhaust leak .
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Old 09-06-2010, 10:27 AM   #1347
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Quote:
Originally Posted by wichitalegacy View Post
lol, My bad . I logged it again using the corrected . I am only hitting 21 for about 1k rpms and then it drops off quickly after that. I'm guessing I have a boost leak or a pre turbo exhaust leak .
Maybe your turbo is falling out of efficiency? What turbo is it?
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Old 09-06-2010, 11:24 AM   #1348
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I'll try playing with the cold start enrichment... but I also need to play with the after start enrichment as well... When I log target AFR after it is running it is targeting around 14.9 AFR, and my LC-1 is reading about 9.0 AFR... After the stock o2 sensor warms up AF correction starts pulling back fuel, then it pulls too much, and that goes back and forth between rich and lean until the coolant temps come up, then the AF correction settles down to +- 5%

I'm stumped on that part
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Old 09-06-2010, 12:55 PM   #1349
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Quote:
Originally Posted by wichitalegacy View Post
its a 2004 sti . I'm at 1300' . Wichita kansas. I know a big turbo like a gt35r would be out of the picture but I was thinking maybe I could get by with a 20g and not max out my injectors .

I have the vf39 right now on e85 and not happy with my track #s . Only running [email protected] with a 1.65 60' . Dyno was 305whp and 355-60wtq .
You will max out 850's with a 20g at stock fuel pressure. You could raise the pressure, swap injectors, or simply detune for it.
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Old 09-06-2010, 03:31 PM   #1350
juanmedina
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Quote:
Originally Posted by wichitalegacy View Post
its a 2004 sti . I'm at 1300' . Wichita kansas. I know a big turbo like a gt35r would be out of the picture but I was thinking maybe I could get by with a 20g and not max out my injectors .

I have the vf39 right now on e85 and not happy with my track #s . Only running [email protected] with a 1.65 60' . Dyno was 305whp and 355-60wtq .
you should get retune, with a VF39 on E85 you should be able to trap 115mph on a full weight STi. PM Phatbotti TKR they are a vendor here.

If you get a 20g you will max out the injectors like rexblake says

Quote:
Originally Posted by wichitalegacy View Post
lol, My bad . I logged it again using the corrected . I am only hitting 21 for about 1k rpms and then it drops off quickly after that. I'm guessing I have a boost leak or a pre turbo exhaust leak .
The stock MAP sensor max outs at 22.7psi, post a log here. Copy and paste from excel and use the [code][/code.] tags

GL
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