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10-19-2005, 09:31 AM | #1 |
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How high can you get the boost in first gear, large turbo owners speak up!!!
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10-19-2005, 09:48 AM | #2 |
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with my sr50, the most i can get is about 17-18psi in first gear.
...this is with my lowest common denominator (6th gear) set to about 22psi. |
10-19-2005, 12:06 PM | #3 |
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GT30R: about 20.5 psi, EWG, AVC-R
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10-19-2005, 12:09 PM | #4 | |
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how much horsepower is that making? |
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10-19-2005, 12:43 PM | #5 |
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TEC TD06H-50trim (basically a Green) @ 5000-6000ft asl - 20psi in 1st gear - AVC-R works wonders
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10-19-2005, 01:02 PM | #6 | ||
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Hey, David, I got a question for you: are you using the gear learning feature, or do you have boost and duty cycle hard set? |
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10-19-2005, 03:38 PM | #7 | |
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10-19-2005, 03:38 PM | #8 |
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I use a big hp shot of nitrous oxide. That works wonders. I go WOT, gently step off the clutch and then flip the switch that sprays the nitrous. Whooo hoooo hello 1.6 flat sixty fts
Clark |
10-19-2005, 03:57 PM | #9 |
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AZ, glad to see you chimed in, even though it was a bit OT, can you chime in on another APS arguement im having.... someone at aps is trying to tell people, that the sr55 only being able to hit 11 psi in first gear, is due to the stis inability to spool that turbo up in the lower gears, which is in part correct, but not in so much that a ****ing SMALL breed of gt30r cannot get peak boost in the lower gears.
i say that the problem is mostly the actuator springs that come on the turbos. aps says that its not that. heres the link, you can read through what has been said thus far, since im sure my synopsis(sp?) is incomplete. if youd be so kind, the first few posts on this topic start at my post which is number 35 (on page 2) http://forums.nasioc.com/forums/show...=849368&page=2 |
10-19-2005, 04:16 PM | #10 |
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I have a GT35r on an o5 STI ... I see target boost in 1st gear (18-22 psi, depending on setting) although not until 5800RPM...it still goes by in an instant.. actually from what I can tell in my datalogs, 1st lasts about 1.4 seconds, 2nd about 2.1, and 3rd about 3.5 seconds.
Cheers. |
10-19-2005, 04:23 PM | #11 |
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thanks for the info, so you are seeing 18-22 psi in first gear?
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10-19-2005, 05:03 PM | #12 | |
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I'd see 5800 18PSI at the in first with AVCR and a green. |
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10-19-2005, 05:10 PM | #13 | |
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Peter is working Sales for APS. This is obvious man. The Actuator on the SR is crap. This is why I run two 9lb springs strapped on the gate. This will hold the gate shut and allow more boost in lower gears. It also allows more boost at redline. There is always an advantage to get the gate pressure close to your actual boost pressure. Slapping on an 8 psi off the shelf gate and then asking that gate to run 20 psi is not good engineering. The gate should hold at least 14-15 psi alone. Then a boost controler can be used to get the extra boost you need for maping. Clark |
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10-19-2005, 06:14 PM | #14 |
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GARD THANK YOU CLARK, i am not taking crazy pills!
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10-19-2005, 06:30 PM | #15 |
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What actuator is on the APS SR40 and is this sufficient or would an uprated actuator benefit that turbo too......i see that the one i have is tightened right up on the adjustment!!
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10-19-2005, 08:13 PM | #16 | |
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yuppers... I haven't set target boost above 22 psi yet, but assume that above 22 psi is also achievable, just at a higher RPM. |
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10-19-2005, 08:15 PM | #17 |
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ive got a 38mm tial gate, and I once forgot to hook up my boost controller, did a wot run in first gear, and detonated my way to about 28 psi on 91 pump gas.
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10-19-2005, 08:18 PM | #18 | |
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Seems to work OK, but I still get an occasional overboost of 0.1-0.15 bar, which they tell me is no big deal. Since they tuned it at sea-level, and I'm at 4K asl, I concur. The whole thing is still a little mysterious to me, but what can you expect given the "manual." What a joke. |
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10-19-2005, 11:03 PM | #19 | ||
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Quote:
Peter |
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10-20-2005, 01:03 AM | #20 | |
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When I remove the AVC-R, my tial opens right at 0.9 bar. It's perfect for when my daughter asks to borrow the car. She's doesn't know the difference, and I rest a lot easier. Not to mention there's no chance one of her friends will mistake it for a game-boy and turn the motor into a roman candle. |
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10-20-2005, 01:59 AM | #21 |
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yeah, no, if you do not assist the underside of the diaphram, with boost pressure, it will not open at that boost pressure. (on my wg atleast )
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10-20-2005, 11:50 AM | #22 |
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Huh, as I said my 44 tial comes with a 0.9 bar spring so once it reaches that pressure in the up-pipe it pops full open and kills further spool-up unless the AVC-R is there to keep it shut until it reaches more pressure. Maybe it jammed because it was gunked up?
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10-20-2005, 01:46 PM | #23 |
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thats wierd, because the actual rate of a .9 bar spring isnt just .9, if i remember correctly. it is .9 psi MAP when the WG will open, IF you have a line run from the manifold, or IC pipe, to the under side of the diaphram. for example. on my car. (and this maybe some wierd ass different with our WGs or something), but my tial 38 has a .7 bar spring. if i run a hose from the manifold to the underside nipple or bottom nipple on the wg, then, at 10 psi, or .7 bar, the WG will open. IF, i take that hose off, and run NO hoses to either nipple on the WG, then the boost will climb WAY past levels where I want to let the motor boost. My greddy gauge started scaring me as it neared 2 bar by the time the impulse got from my brain to my foot, and I let off. and that was in first gear. i ordered the wg with a .7 bar spring, so um sure of that.
can someone with an idea chime in on this? |
10-20-2005, 02:19 PM | #24 |
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Sorry, but I hadn't even considered that you didn't have the intake line connected. Brain fart on my part - I'd completely forgotten about that little detail.
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10-20-2005, 02:23 PM | #25 |
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oh, yeah, ok.! hha, so you have both on, then just pull the top one for your makeshift daughter/valet mode.
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