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Old 09-20-2009, 07:25 PM   #1
scoobystas
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By hotmetal5 at 2009-09-20

i thought i would be closer to 270-280hp like tuned vf34 and vf39. This is with a version 8 motor and functional avcs. Its basically a stage 2 STi with Walbro 255 fuel pump. Stock jdm IC, stock intake, stock TS manifolds and uppipe. catless 3" catback. The downpipe is hacked at the oem head and welded to 2.5" piping.

open ecu tuned to 18lbs.
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Last edited by scoobystas; 09-20-2009 at 11:03 PM.
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Old 09-20-2009, 07:47 PM   #2
jutes85
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DD read low. Those numbers look about right at that boost level and mods. You'll hit 280hp no problem on a brahdyno.
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Old 09-20-2009, 07:50 PM   #3
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Looks about right to me!
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Old 09-20-2009, 08:29 PM   #4
scoobystas
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the car was tuned in 4rth gear. I did some datalogging and it hits full boost at about 4100 in third gear....thats a bit high no? especially since i have avcs?
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Old 09-20-2009, 10:07 PM   #5
tplumsti
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dyno dynamics run low? thats news to me, i thought dd was in the closest range?
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Old 09-20-2009, 10:24 PM   #6
darranNW
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Quote:
Originally Posted by scoobystas View Post


i thought i would be closer to 270-280hp like tuned vf34 and vf39. This is with a version 8 motor and functional avcs. Its basically at stage 2 with 255 fuel pump. Stock jdm IC, stock intake, stock TS manifolds and uppipe. catless 3" catback. THe downpipe is hacked at the oem head and welded to 2.5" piping.

open ecu tuned to 18lbs.

do you have any pics of your down pipe? i've been thinking of doing that
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Old 09-20-2009, 10:55 PM   #7
scoobystas
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darrenNW,

its not pretty trust me. there are no leaks but the SS piping post the cast head are not perfectly smooth, the shop just has a pipe bender so the bends are not mendrel bents. I'm thinking of buying a 3' downpipe and having a shop weld the IA performance vf37 flange. The neck of the oem jdm downpipe actually tapers to 2.25", so i think its holding me back.
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Old 09-20-2009, 11:51 PM   #8
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Quote:
Originally Posted by scoobystas View Post
...Its basically a stage 2 STi...
Sounds like a bit of a stretch to me. With those numbers you are still 50 whp behind what most stage 2 setups make. Looks good all the same.
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Old 09-21-2009, 12:14 AM   #9
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What does a stock STI put down on this dyno?
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Old 09-21-2009, 10:39 AM   #10
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Quote:
Originally Posted by ZaQSTI View Post
Sounds like a bit of a stretch to me. With those numbers you are still 50 whp behind what most stage 2 setups make. Looks good all the same.
You think most stage 2s hit 300whp on DDs? This is a 2l right?
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Old 09-21-2009, 11:09 AM   #11
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Quote:
Originally Posted by ZaQSTI View Post
Sounds like a bit of a stretch to me. With those numbers you are still 50 whp behind what most stage 2 setups make. Looks good all the same.
It's right where Stage II USDM STi's are on the Mustang Dyno that my car gets tuned on. 245-265 day after day after day.


That's decent numbers for a 2.0 and you're holding it passed 7300. Nice.
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Old 09-21-2009, 01:01 PM   #12
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What turbo is this?
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Old 09-21-2009, 01:41 PM   #13
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I put down 305/305 full spool at 3550(ish) on my version 8, stock vf37...

21 psi - basically stage 2 like yours.
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Old 09-21-2009, 05:10 PM   #14
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Don't compare dyno numbers. Take it to the strip and see what your MPH is with good driving.
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Old 09-21-2009, 06:07 PM   #15
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Quote:
Originally Posted by scoobystas View Post
[IMG] and welded to 2.5" piping.
well....most name brand tbe are 3".

and many "stage 2" folks also have headers, up pipe, tgv deletes, and intake.
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Old 09-21-2009, 08:30 PM   #16
scoobystas
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well from what i understand the oem twinscroll header thats on this motor is really well built and designed from the factory. the intake manifold has no tgv since its jdm. I think if i were tuned at 20 or 21lbs i would have made much better numbers.

I know this is going to be off topic and belong in ecu forum but i've already got the dyno chart here, etc.


if i raise target boost and crank up the wastegate duty cycles just a bit to actually hit the 21lbs or so, what else would i need to change on my map? I'm assuming i should take a few degrees of peak load timing out, since increased boost in those ranges will raise cylinder pressures and it might knock??? My afr is 11.2 i believe at redline, so wouldn't need to mess with that too much, or is it dynamic and will change once i alter boost?

Last edited by scoobystas; 09-21-2009 at 08:39 PM.
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Old 09-23-2009, 12:41 AM   #17
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Quote:
Originally Posted by scoobystas View Post
well from what i understand the oem twinscroll header thats on this motor is really well built and designed from the factory. the intake manifold has no tgv since its jdm. I think if i were tuned at 20 or 21lbs i would have made much better numbers.

I know this is going to be off topic and belong in ecu forum but i've already got the dyno chart here, etc.


if i raise target boost and crank up the wastegate duty cycles just a bit to actually hit the 21lbs or so, what else would i need to change on my map? I'm assuming i should take a few degrees of peak load timing out, since increased boost in those ranges will raise cylinder pressures and it might knock??? My afr is 11.2 i believe at redline, so wouldn't need to mess with that too much, or is it dynamic and will change once i alter boost?
You have a wideband o2? Essential for that.
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Old 09-23-2009, 01:42 AM   #18
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Quote:
Originally Posted by scoobystas View Post
well from what i understand the oem twinscroll header thats on this motor is really well built and designed from the factory. the intake manifold has no tgv since its jdm. I think if i were tuned at 20 or 21lbs i would have made much better numbers.

I know this is going to be off topic and belong in ecu forum but i've already got the dyno chart here, etc.


if i raise target boost and crank up the wastegate duty cycles just a bit to actually hit the 21lbs or so, what else would i need to change on my map? I'm assuming i should take a few degrees of peak load timing out, since increased boost in those ranges will raise cylinder pressures and it might knock??? My afr is 11.2 i believe at redline, so wouldn't need to mess with that too much, or is it dynamic and will change once i alter boost?
you get my PM.. ?

Not sure what gear that log was, but your timing doesn't look right
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Old 09-23-2009, 01:06 PM   #19
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Quote:
Originally Posted by scoobystas View Post
darrenNW,
The neck of the oem jdm downpipe actually tapers to 2.25", so i think its holding me back.
2.25 pipe FTL. Cars that make good power have 3" from the turbine outlet to the exhaust tip, period.

Stage 2 STis make 260-280 WHP on this dyno. Stock STi makes 195-210 depending on the year. 2,0l WRX makes 145-155 stock.
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Old 09-27-2009, 01:45 PM   #20
scoobystas
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i don't have a wideband 02, unfortunatley. I guess i'm gonna search for an IA flange to fit a proper 3" downpipe and then see what happens.


car was tuned in 4th gear, so the dyno pull is also 4th. I do my logging in 3rd because a 4th to redline pull hits rediculous speeds.
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Old 09-27-2009, 04:50 PM   #21
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Quote:
Originally Posted by Rokkit View Post
I put down 305/305 full spool at 3550(ish) on my version 8, stock vf37...
...on what dyno? I'll bet it wasn't this one.
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Old 09-27-2009, 05:47 PM   #22
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i put down 302/299 on a dyno dynamics. vf39 , fmic , step colder plugs, k&n typhoon.
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Old 09-27-2009, 09:55 PM   #23
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This is why you cannot use dynamometer numbers as empirical fact. Before and after on the same dyno, back to back yes. Everything else is a waste of bandwidth.


OP: Glad you got some decent power out of your car, I hope you enjoy it.
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Old 09-28-2009, 12:09 AM   #24
scoobystas
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thanks ufo....i do enjoy it. i'm getting some FBC and FLKC here and there so i'm fine tuning the timing tables. I really want to push this turbo harder however, but i'll need the bigger downpipe and a wideband o2 for tuning it.
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