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Old 08-03-2012, 05:10 PM   #26
Phatron
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Flat roads are a must. Any incline/decline will effect the output
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Old 08-03-2012, 06:36 PM   #27
spec_bg
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wait a minute. i was never blasting phatron. i debated making a thread in the first place , but was looking for advise. that chart posted is the first time ive seen it. my question is how airboy compares to all these dyno #s being posted. the dom1.5 is putting down 350+ on the dyno. i dont care about numbers but i do care that after i spend 2 thousand dollars between turbo/inj and my car doesnt feel much faster than when i had the vf.

my buddy with the sti has cams, fmic,ap uel header. the other mods are same as mine. he's not protuned.it was from a roll and we started at same time. when i ran him with my vf43 before he had cams he put 1/2 car length on me. it was close. i might have something wrong mechanically or i just had high hopes for this turbo, thats why i posted on the forums.

my mods:
dw 850cc
dom1.5 8cm with ptp blanket
turboxs tmic.
grimmspeed ebcs
3" catless tbe. dp heatwrapped
tgv deletes with gs phenolic spacer
perrin turbo inlet
aps cai with perrin afta maf
sti exh mani
perrin pulley
greddy catless upipe heatwrapped
oem sti bpv


i think im pretty well bolted. i didnt want to mention who tuned it cuz i didnt want to stir up anything, that wasnt my point
what does having a 6 speed matter, he shifts more often than me. i have the taller gears. he even said i should pull him with my gears. im holding 18psi to redline where he tapers to like 11 psi

Last edited by spec_bg; 08-03-2012 at 06:56 PM.
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Old 08-03-2012, 07:15 PM   #28
northman
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Why is the VF torque way higher than the Dom torque? On my setup, max boost is about the same, and max torque is about the same, but shifted to the right by 500 rpm or so. That is what I would expect to see. If the VF tune was done by someone else, and they ran a much more aggressive map, that could explain it. From the plot above, you are only making more power above 5,000 rpm, so no doubt unless you wring it out to redline it will not feel faster.
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Old 08-03-2012, 07:22 PM   #29
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phatron was the tuner on both of those logs vf and dom 1.5. can you post your plot if you still have it? the one with both turbos overlaying each other
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Old 08-03-2012, 07:28 PM   #30
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I hope you get it figured out man. I know I get a little bent out of shape when it comes to my car too. Sorry if I directed that to you, it was for the others that were blaming the tuner. Ron always helps if I have a problem. spec_bg my bad, I hope you get things squared away.

I was thinking cams would give you friend more mid to top end power, so he would be able to hold a gear that much longer... Makes sense to me. Can anybody verify or explain what cams will do?
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Old 08-03-2012, 07:39 PM   #31
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no prob. ron has been helpful with me as well. i was in a bind needing to get my fueling straightened out so i could make it to work and he hooked me up quick on a weekend


i think he has stg 3 cams , they are aggressive. he's getting ready to go rotated
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Old 08-03-2012, 07:40 PM   #32
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Quote:
Originally Posted by spec_bg View Post
phatron was the tuner on both of those logs vf and dom 1.5. can you post your plot if you still have it? the one with both turbos overlaying each other
like this?




This is a slightly outdated plot, since been retuned to run boost out flat to redline, but the plot looks about the same.
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Old 08-03-2012, 08:19 PM   #33
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thats what im going for^^^. thats a 1k rpm difference than mine from where they crossover and the dom shines
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Old 08-03-2012, 08:45 PM   #34
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Quote:
Originally Posted by spec_bg View Post
thats what im going for^^^. thats a 1k rpm difference than mine from where they crossover and the dom shines
To be fair, my Dom tune also includes headers and TGV deletes, so not truly apples to apples, but I think the trends would be similar. What I don't get is the big difference in torque on your plot. My car, with the Dom, makes more torque with less boost, while yours appears to be the opposite (I say "appears" because boost is not plotted, but I'm assuming it is similar).

Also, the dyno plot is done in 3rd, on the street in the bigger gears it spools sooner than the graph would suggest. How does your car do in 4th and 5th?
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Old 08-03-2012, 08:58 PM   #35
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same in 4th and 5th compared to my old setup. my logs are done in 3rd. header would be the only difference since i have tgv deletes. the topspeed dyno has vf compared to dom as well and it looks similar to yours and so does the others ive seen on here.
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Old 08-04-2012, 01:56 AM   #36
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Here is the boost curves

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Old 08-04-2012, 12:15 PM   #37
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boost, timing, AFR. to the gurus above that said its a ****ty tune....where can I extract power? I'm always open to suggestions.


Last edited by Phatron; 08-04-2012 at 12:24 PM.
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Old 08-04-2012, 02:04 PM   #38
spec_bg
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im open to suggestions to. why is my setup 1000rpm later. seems its not making the torque like it should. again i dont care about numbers just the difference in numbers from mine compared to dyno plots being posted. if im making 275trq and others are making around 360 torqe thats a huge difference.

when i look at airboy numbers on the power braggin section they seem close to dynos.just not mine. that and the fact that i shouldnt be pulled on by a vf. i ran the gears out and still didnt gain a inch on him.

judging from the power plot, it seems like i made a downgrade for the type of driving i do which doesnt include taking it to redline all the time. maybe northman or anyone on 93oct would be kind to post up a log to compare. loggin the same parameters.then i could relax if they are close.
the 350g's compared to my 300g's shows him making 50 more hp but i dont know

Last edited by spec_bg; 08-04-2012 at 02:33 PM.
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Old 08-04-2012, 02:22 PM   #39
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Is you MAF sensor in the right way, I know it will throw it out of wack if its in backwards...
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Old 08-04-2012, 02:26 PM   #40
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Quote:
Originally Posted by spec_bg
the 350g's compared to my 300g's shows him making 50 more hp but i dont know
as I already stated above the g/s numbers are meaningless unless the injector scalar, latency, maf scale and OL fueling table are identical.

As your car sits I can go change the mapping and have you hitting 350g/s too.
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Old 08-04-2012, 02:29 PM   #41
spec_bg
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yeah and ive cleaned it. i thought more people with this turbo would have chimed in.

ok, i just wasnt sure about maf g 's, i just thought that since my hp matched my g's and northman hp matched his g's.
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Old 08-04-2012, 04:11 PM   #42
Phatron
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I've done several of them, it just doesnt seem like a good turbo for a 2.5L. It's a choked up dom2.5. I think a nice tomei, maddad, prosport 3bolt EL header would help.
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Old 08-04-2012, 04:15 PM   #43
punchjamesarnol
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Heres a bitchin' set of EL's. (I have them)
http://www.ebay.com/itm/02-07-Subaru...#ht_1699wt_907
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Old 08-04-2012, 09:32 PM   #44
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I have a set of gt spec el headers and tial 38mm ewg I'm not gonna run...
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Old 08-04-2012, 09:46 PM   #45
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Quote:
Originally Posted by abrumlev View Post
I have a set of gt spec el headers and tial 38mm ewg I'm not gonna run...
how much for the 38mm Tial?
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Old 08-04-2012, 11:35 PM   #46
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Interesting thread because I'm seeing the same thing on my setup. (low HP / Torque, peak boost of 21 psi at 4k)

Dom 1.5 w/10cm hotside
Killer B headers / Uppipe (Wrapped)
3" Downpipe
AVO Mid / Y-pipe (tapers to 2.5) but still have the stock mufflers.
Process West TMIC (Gold wrapped)
Turbosmart BPV
DW 850cc
DW 65c
Grimmspeed EBCS
KSTech 73mm CAI

Honestly I don't know how people are making so much power. I got it protuned at two different places local. First place made OK power, but DAM was consistently 0.81 and AF learning D was -15. No known boostleak, but tuner wasn't responding. Other place was tuned during the heatwave (100F) and made ~300/~300.

Last edited by AuthenticAMD; 08-05-2012 at 09:56 AM. Reason: Added CAI, turbo specs
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Old 08-05-2012, 03:30 AM   #47
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it doesn't seem to me that the turbo is the problem. It is boosting well, hitting higher boost than my tune. The motor just seems off, like something's wrong. I second my earlier suggestion to do a leakdown.
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Old 08-05-2012, 08:21 AM   #48
spec_bg
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Other place was tuned during the heatwave (100F) and made ~300/~300.[/quote]

what did that shop say about it, did they think there was a problem or that it was normal with the heat?

if the dom is fully spooled by 4k rpm and so is vf then you would think they would overlap there and not at 5k. im gonna have someone test the engine
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Old 08-05-2012, 08:52 AM   #49
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I have the dom1.5 10cm in a 08 STI, stock manifold, my torque did not really go up but hp did, a lot. I'm not done tuning yet so we shall see.

I feel for you about getting beat by a vf car, your tune looks great though. You're not a 1000 rpm back more like ~600 rpm. The overlay of your vf and the dom shows you crossing 18psi at 3250 and 3800. The real mystery is where did the torque go? I would go over the install and check the engine, something is off.

Please stop comparing VD or airboy's dyno with other dynos it is a useless endeavor. Go to the strip and get a trap speed, a true test of power.

FWIW I was moving 282g/s stage 2 and 300g/s now, you just can't compare these it is meaningless. Also I'm hitting peak boost at 3800 in 3rd and 3700 in 4th.

Good luck man
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Old 08-05-2012, 09:38 AM   #50
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thanks^^^. after reading, a skipped timing belt could be a issue, would this show up in logs? im due for timing belt service anyway.
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