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Old 11-06-2005, 03:04 PM   #1
odin1
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Default Those of u with td06-20g or 18g on sti-in 4th gear at what rpm do u hit full boost?

Am considering these turbos, but want to make sure they are not too laggy. My stock vf39 with supporting mods and reflash hits 22psi at 2650- 2750rpm.Also how is re-spool after throttle lift off and on. ie throttle response? Any help would be appreciated. Thanks
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Old 11-06-2005, 04:35 PM   #2
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My STi is td06-18g'ed. The lag is right around stock. Throttle response is amazing. I dont know any numbers off the top of my head, but next time I take it for a drive, Ill take a look.

For as cool as it is to have insta-boost, Ive found myself wanting a bit more on the top end. I will probably step up to a 20g or a SZ49 come summer time.

-George
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Old 11-06-2005, 05:43 PM   #3
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dyno's from your 18G, george??

##'s at least, and psi threshold?

ese
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Old 11-06-2005, 06:00 PM   #4
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It wasn't dynoed.

Estimates from my tuner (Phil @ Element Tuning) put me around 320.

Forgive me for not knowing the definition of PSI Threshold. If you'd define it for me, Id be happy to see if I could answer the question.

-George
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Old 11-06-2005, 06:03 PM   #5
ESEMES
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wondering what the peak boost was, if it was controllable, or if it crept (and ifso, how high)


dont know if that is the true definition of boost threshold, but rather the definition of what im after.


thnx

ese

ps- 320Whp, based on a ____ baseline WHp.
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Old 11-07-2005, 01:19 AM   #6
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Quote:
Originally Posted by STIgeorge
My STi is td06-18g'ed. The lag is right around stock. Throttle response is amazing. I dont know any numbers off the top of my head, but next time I take it for a drive, Ill take a look.

For as cool as it is to have insta-boost, Ive found myself wanting a bit more on the top end. I will probably step up to a 20g or a SZ49 come summer time.

-George
Thanks George. Also if possible could u tell me what max boost you're running and what boost you hold to redline? thnx. Btw, if you sell yor 18g, let me know, I may be interested depending on the responses I get here. Takecare.
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Old 11-07-2005, 01:45 AM   #7
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ODIN1, did you mean you are running 22psi on the vf39 stock sti turbo??? is that correct?
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Old 11-07-2005, 02:25 AM   #8
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Quote:
Originally Posted by chrismindless
ODIN1, did you mean you are running 22psi on the vf39 stock sti turbo??? is that correct?
22psi, in the midrange-tapers to 15psi at redline. All tuned and nice and safe. :-).
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Old 11-07-2005, 01:05 PM   #9
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Peak boost right now is 18.5, which is low because Im still on the stock topmount. Any decent front mount should yeild a major gain.

There are no problems with holding that or creeping.

Didn't get a baseline for the car, but I will look into the type of dyno that was used to base my whp estimate on. If I remember correctly, Phil said that he was working on a car w/ a Green that wasn't quite running right. He dyno'ed that car at around 320hp and said that mine felt equally, if not slightly stronger. It is an absolute BLAST in 1st-4th gear. The power in 5th drops off noticeably (though still stronger than stock), but keep in mind this turbo is still on the small side of the spectrum. There is enough power and boost comes on quick enough that any highway passing can be done is 6th w/o down shifting.

Odin,
Not sure of boost to redline, will check into that.
When I upgrade (probably Spring '06) I'll let you know.
The car will be in storage all winter, I'm picking up a Nissan Titan to beat around in for the nasty months.


-George
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Old 11-07-2005, 04:06 PM   #10
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Quote:
Originally Posted by odin1
Am considering these turbos, but want to make sure they are not too laggy. My stock vf39 with supporting mods and reflash hits 22psi at 2650- 2750rpm.Also how is re-spool after throttle lift off and on. ie throttle response? Any help would be appreciated. Thanks
With my DB TD06 20G, I'm hitting 19psi in 4th. Re-spool is very close to my old vf22 along with throttle response but holds all the way to redline whereas the vf22 ran out of breath at 6200 rpm.
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Old 11-08-2005, 12:50 AM   #11
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remember, a FMIC is a waste on the vf39. I proved the math last weekend, i am running the vf39 w/ just a TBE and cobb stage 2 vs an sti w/ FMIC, custom tuned, TBE and MBC ...

I held on him and began to pull ... and he puts down more whp than I do ... proof that power curves win the day and the FMIC was killing him inbetween shifts ...

only putting this out there as info, cheers!
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Old 11-08-2005, 01:48 AM   #12
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Quote:
Originally Posted by mantra1
With my DB TD06 20G, I'm hitting 19psi in 4th. Re-spool is very close to my old vf22 along with throttle response but holds all the way to redline whereas the vf22 ran out of breath at 6200 rpm.
Thanks guys. Good info. What I'd reaaly like to see from you and George if at all possible is-starting from a 2000rpm roll n 4th, nail the gas and see at what rpm you reach full boost and how much boost u hold to redline in 4th. If you guys could do that, then I'd know how it compares to my vf39 and life would be good again. lol. Seriously tho, I've been looking for someone with these combos that could do that. I'm the only modded sti in my parts. Thanks much.
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Old 11-08-2005, 09:37 PM   #13
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odin,

The reason I haven't answered your questions yet is because Im at college. I rarely get the chance to drive my car, however, this weekend I'll be heading home. Ill get your answers posted by Saturday at the latest.
-George
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Old 11-08-2005, 10:33 PM   #14
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19 psi at 3300 rpm and holding to 6800
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Old 11-09-2005, 12:16 AM   #15
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Quote:
Originally Posted by mantra1
19 psi at 3300 rpm and holding to 6800
Nice....
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Old 11-09-2005, 01:37 AM   #16
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Quote:
Originally Posted by Adrift
Nice....
What he said ^^^. That's great spool! Thnx man. :-).
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Old 11-09-2005, 01:39 AM   #17
odin1
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Quote:
Originally Posted by STIgeorge
odin,

The reason I haven't answered your questions yet is because Im at college. I rarely get the chance to drive my car, however, this weekend I'll be heading home. Ill get your answers posted by Saturday at the latest.
-George
Hey George. Thnx . Much appreciated. :-)
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Old 11-09-2005, 04:37 PM   #18
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i know mark/themadscientist runs a 20g. maybe he'll chime in here.
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Old 11-09-2005, 06:58 PM   #19
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Quote:
Originally Posted by mantra1
19 psi at 3300 rpm and holding to 6800
Is that with a catted or catless downpipe?
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Old 11-09-2005, 07:51 PM   #20
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Quote:
Originally Posted by import111
Is that with a catted or catless downpipe?
Also if possible, full modlist please.
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Old 11-09-2005, 09:14 PM   #21
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This is on a hybrid motor (ej257/wrx heads, 8.7:1 cr) with an MRT TMIC, ECUTek, catless TXS TBE and all the supporting mods.
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Old 11-09-2005, 10:08 PM   #22
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TMIC vs FMIC is important. So is after market header brand vs stock manifold vs ported polished manifold. Heat coating on various parts too. Those factors will make a pretty big diff on spool time and partial throttle response. I'm sure alot or most of you know this, I'm just reiterating the fact we need to know supporting mods in order to have a full understanding of what it takes to make these turbos spools this well.
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Old 11-10-2005, 12:50 AM   #23
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Quote:
Originally Posted by mantra1
This is on a hybrid motor (ej257/wrx heads, 8.7:1 cr) with an MRT TMIC, ECUTek, catless TXS TBE and all the supporting mods.
Mantra-thnx a lot. Allright, now we're getting somewhere. Silversurfer also raises several good points. I imagine sti heads with avcr would improve spool over stock wrx heads. Your choice of boost controller would help as well. Mantra, what are u using for boost control? Hmmm..I wonder if 20g full spool could happen by 3000 rpm on an sti w/ approprite VE enhancing mods. Take care. Odin.
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Old 11-10-2005, 12:51 AM   #24
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Quote:
Originally Posted by mantra1
19 psi at 3300 rpm and holding to 6800
what gear? 6th?
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Old 11-10-2005, 08:47 AM   #25
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Quote:
Originally Posted by TexRex2002
what gear? 6th?
4th gear. No 6th in a RA Tranny
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