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Old 08-05-2012, 09:41 AM   #51
AuthenticAMD
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Quote:
Originally Posted by spec_bg View Post
Other place was tuned during the heatwave (100F) and made ~300/~300.

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

Shop said it was normal. They didn't think there was anything wrong with it. Although they said making my exhaust a full 3" back would help spool and power. Although I do wonder if the stock muffler would cause me to lose 50hp...

My other theory of lack of power is due to the Process West TMIC pipe bends to support the DOM for legacy fitment. Maybe this really kills the power? I do have to wonder if the stock turbo intake is collapsing, but I kind of doubt it.
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Old 08-05-2012, 09:55 AM   #52
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I should also say I'm not burning any significant amount of oil. My OCIs are 3500 miles. The previously mentioned dyno numbers were not done on a Mustang, but dynojet or dynapack.

Also, I have the 10cm hotside option, which could hurt spool, but I didn't expect it to be 4k.

Honestly I'm tired of throwing money at the car and perhaps it's for the best. If the car doesn't make big power, then it's more reliable right?
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Old 08-05-2012, 10:03 AM   #53
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my 8cm is 18psi at about 3850rpm so not that far off from yours.

my biggest thing is being outperformed by the vf and the money ive sank into this to get a little more performance without going wild. i just wanted a little more than the what the vf offered. nothmans dyno plot looks nice for a dd and wouldnt be outran by a vf car.

i would be happy if i was overlapping at 4k too. it should since im making 18psi there. would more timing help with that or hurt it? my car feels like the airboy shows. i like midrange power and that why i went with this turbo. i think i was running less timing with the vf, not sure though.
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Old 08-05-2012, 03:09 PM   #54
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What rpm are you starting at When doing your frum rollz vs the vf?
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Old 08-05-2012, 03:23 PM   #55
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we started in 2nd gear around 2300 rpm. topped 2nd and 3rd and let off somwhere in later 4th when i wasnt gaining. im gonna run him again , and start at different rpm. before he flashed a more aggresive timing map, i put a nose on him and stayed there.

we were just doing this for comparison sake. the vf shouldnt have that much more trq at 4k when this turbo is spooled right?

Last edited by spec_bg; 08-05-2012 at 03:37 PM.
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Old 08-05-2012, 03:43 PM   #56
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I think you need to trade me for my vf48. I know I would be happy!!!!!!
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Old 08-05-2012, 03:52 PM   #57
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Also what type of car is the vf car?

But starting at 2300....he's gotta take like 5 cars on you outta the hole starting that low.

Last edited by Phatron; 08-05-2012 at 04:02 PM.
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Old 08-05-2012, 04:01 PM   #58
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Quote:
Originally Posted by spec_bg View Post
we started in 2nd gear around 2300 rpm.
This is way, way out of your powerband. Start at 4k+ and brake boost
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Old 08-05-2012, 04:01 PM   #59
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05 sti, peaking at 19psi tapering to around 11psi. surprisingly his idc's are low 90's. we took logs to compare right afterwards, the main difference is he is running more timing everywhere. its not knocking even though it might be harmful, egt's, i dont know, its quick.
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Old 08-05-2012, 04:08 PM   #60
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This is way, way out of your powerband. Start at 4k+ and brake boost
i thought about that, but wouldnt i have at least gained on him? i figured he would get the jump, but not hold the lead.

ive been searching on the forums and all the dyno plots seem consistent from different shops and tuners. these same shops have stg2 sti's at high 2hundreds like i was and they went to 350+ with dom. i know they are numbers but i have nothing else to go off of.
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Old 08-05-2012, 04:29 PM   #61
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You're looking at dynojet #'s.....look at this one

http://www.efilogics.com/dyno/graph....rgb1=000000255
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Old 08-05-2012, 04:46 PM   #62
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i just looked at his log from that day. his timing doesnt go below 20 the entire range. that cant be good can it? do cams like timing or something?
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Old 08-05-2012, 04:55 PM   #63
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^ that's crazy.
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Old 08-05-2012, 07:00 PM   #64
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All I know is my 2008 STi with Dom1.5 pulls significantly harder than my 2011 WRX with VF52. I still have both in my garage, so I can drive them back to back and the STi is definitely faster.

One thing I would suggest is using flat-foot shifting. I can tell a pretty significant pause in boost if I shift normally vs flat-foot shifting. FFS almost makes it feel like I didn't even shift at all, continuous acceleration.
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Old 08-05-2012, 10:07 PM   #65
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Quote:
Originally Posted by Uncle Scotty View Post
man...sounds like ya got a bad tune

get it tuned by a local tuner
about time they ban your dumbass.
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Old 08-07-2012, 01:30 AM   #66
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Quote:
Originally Posted by VisBits

about time they ban your dumbass.
60,000 post vs. your 145.... And countless advice stickies and posts. You might not want to tell someone they are a dumbass. Especially since everyone agreed with him. Have a good night
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Old 08-07-2012, 01:31 AM   #67
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And yes. Local tune is amazingggggg
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Old 08-07-2012, 01:41 AM   #68
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about time they ban your dumbass.
dddoooooooddddd gtfo.
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Old 08-07-2012, 01:44 AM   #69
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And yes. Local tune is amazingggggg
explain to everyone why the tune in post37 is bad....and how a local tune would make it better?
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Old 08-07-2012, 03:02 AM   #70
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Quote:
Originally Posted by Phatron

explain to everyone why the tune in post37 is bad....and how a local tune would make it better?

Oh I'm just saying I like it. That's all.
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Old 08-07-2012, 07:48 AM   #71
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the thing that still gets me is why the torque is lower than vf . power and torque should peak sooner and higher than vf at around 4k shouldnt it? i mean if they are both at 18psi the bigger turbo should make more power. im just asking im no expert

me and northman compared logs and they are very similar except for maf g's. he's pulling 350g's and makes 350hp and im around 300 gs making 300hp. maf volts are similar. but mafvolts arent that far off with a vf , they hit around 4.7. im not sure how much difference 4.7 is from 4.8. the sti is pulling around 300 maf g's too.and i think mine also matched on the vf tune too

again im just curious, im not arguing or anything. just want to get this figured out. i miss the torque
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Old 08-07-2012, 09:49 AM   #72
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You should peak later with more power. I'm surprised he was only one car length ahead with you pulling from 2.3kRPM. You need to learn how to stay in your new powerband.
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Old 08-07-2012, 10:52 AM   #73
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Quote:
Originally Posted by spec_bg View Post
me and northman compared logs and they are very similar except for maf g's. he's pulling 350g's and makes 350hp and im around 300 gs making 300hp.
you cant compare g/s between cars.....just stop looking at it

well send me his log and let me plot it up
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Old 08-07-2012, 12:28 PM   #74
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Quote:
Originally Posted by Phatron View Post

well send me his log and let me plot it up
My log was taken going up a hill, so it won't plot very well for acceleration. I will try to make a flat pull and log it in the next day or so, but finding a flat, straight empty stretch of road is not so easy where I'm at.

Maybe looking at MAF g/s is not an accurate measure of power, but on my car it seems to correlate, my VF tune, on different injectors as well, seemed to match (300 whp, 300 g/s), and the current tune at 350/350.
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Old 08-07-2012, 04:14 PM   #75
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It does correlate on a car, but not between different cars.

Brandon was at 250g/s on the vf, now 300 on the dom1.5. Same exact delta as you.
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