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Old 06-05-2013, 11:02 AM   #1
brasstacks
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Default Super laggy 18G ?!?

When does peak boost occur for a TD06SL2 18g 8cm. I just installed mine last week and got it tuned. It runs really well, but the lag seemed very high. I got an 18g instead of the 20 because I was afraid of lag.

Did some data logging and I hit 24psi @ 4800rpm. That seems really high amirite?!

My Setup
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Perrin SRI
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Walbro 255
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Old 06-05-2013, 12:23 PM   #2
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Sounds pretty high, that's a big number though
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Old 06-05-2013, 12:23 PM   #3
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it does seem a bit high. With my Blouch TD06H-20GXT Billet 8cm^2 i hit 23psi at 4300rpm. I have similar mods on my 07 wrx. I kept the stock air box and stock BPV however. Also, i have a PW TMIC instead of a FMIC.

Did you replace the inlet with something larger than stock plastic one? Other than that the only other thing i can think of is that you are seeing a large pressure drop through your pipes and across your FMIC. Turbo needs to work harder to get your 24 psi to the engine so it hits a later RPM. just a guess.
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Old 06-05-2013, 12:41 PM   #4
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Already checked for pre turbo exhaust leaks? Already checked for boost leaks?
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Old 06-05-2013, 01:14 PM   #5
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Ill be doing that tonight. Hopefully i can find a big nasty leak that solves all my problems
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Old 06-05-2013, 01:22 PM   #6
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It doesn't seem that late to me. It's a TD06. Plus, it's a smaller compressor than the 20g. Also, you have the front mount slowing things down even more.
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Old 06-05-2013, 01:45 PM   #7
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Definitely slow spool, even for a FMIC... let us know how the boost leak test goes.
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Old 06-05-2013, 02:05 PM   #8
lovethebugeye
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That's even laggier than my rotated bw 7670 with an fmic.

Gotta be something up...

Last edited by lovethebugeye; 06-05-2013 at 02:12 PM.
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Old 06-05-2013, 02:24 PM   #9
guroove
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How much boost are you making at 3,000 rpm?
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Old 06-05-2013, 02:30 PM   #10
abrumlev
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Who tuned it?
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Old 06-05-2013, 02:42 PM   #11
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Im curious if the tuner just tuned it like a regular 18g, ive plenty of local tuners yet i still have to go elsewhere.
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Old 06-05-2013, 02:46 PM   #12
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When you run a hot side that big on a 1 liter 3 cylinder what do you expect.....Fill out your profile!

TD06SL is a pretty big hot side, big effect on spool.
18G cold side, well with the same hot side I doubt it is hardly any different than a TD06SL-20G or any other TD06SL when it comes to spool. I am sure there is an advantage to a smaller cold side IRT spool, but the big hot side is surely what is killing your spool.

Of course, the above assumes there is nothing wrong with your car / setup. Likely there is something wrong though since spool is so slow.
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Old 06-05-2013, 02:50 PM   #13
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Most likely WGDC cycles are lethargic, pre-turbo exhaust leak, or the WG assembly is leaking.

That is way way way laggy. Most should have a TD06-20g's in the 3400-3900 range depending on model.
A PTE-6262 or HTA86 spools faster than that.
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Old 06-05-2013, 02:58 PM   #14
Spiffy07
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your altitude will have an effect on how quickly you spool as well. I'm at 4,327 feet above sea lvl. My 20G would spool a lot faster if i drove the car to say California.
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Old 06-05-2013, 03:37 PM   #15
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Quote:
Originally Posted by Spiffy07 View Post
your altitude will have an effect on how quickly you spool as well. I'm at 4,327 feet above sea lvl. My 20G would spool a lot faster if i drove the car to say California.
Yeah but 4800 for a 18g.... is ridiculous at any altitude.


/Drunkmann Tuning
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Old 06-06-2013, 09:02 PM   #16
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Greddy 18g. Hits at 3400 on a perrin fmic
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Old 06-07-2013, 03:35 PM   #17
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My td06sl2 20g 8cm will hit 24 psi by 3900-4200rpm depending on the gear and temp so I would think 4800 is a little high.
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Old 06-12-2013, 12:39 PM   #18
brasstacks
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hnnnnggg. Brought it back to my tuner (NF Performance - FuJi k and Nuke209) . No exhaust leak, no boost leak. We played with the waste gate and the duty cycle. Nothing.

Did a couple of runs and my tuner keeps telling me that it does not feel like any 18g he has ever tuned. Its defiantly fast.. I dont have any qualms about the power, but that lagggg.

My tuner says its got exceptional top end for an 18g. The label on the turbo def says tdo6sl2 18g though. Baffled to say the least.

Last edited by brasstacks; 06-12-2013 at 12:50 PM.
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Old 06-12-2013, 12:54 PM   #19
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Post up a dyno chart. 24 psi @ 4800 rpm isn't laggy if you're making > 17 psi @ 3000 rpm. Also, has your tuner tuned a TD06sl2 before? It's quite different from a TD05h, which is what most people are talking about when they say 18g.
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Old 06-12-2013, 12:57 PM   #20
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What brand turbo? I don't think I see you've mentioned that.
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Old 06-12-2013, 01:01 PM   #21
brasstacks
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Kinugawa tdo6sl2 18g.

Yes he has tuned this exact turbo and tdo6sl2 20g's before. Ill get a datalog up when I get home.
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Old 06-13-2013, 12:22 AM   #22
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Old 06-14-2013, 03:13 PM   #23
brasstacks
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nobody eh?
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Old 06-14-2013, 03:39 PM   #24
guroove
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I think everything was covered in this post.

Quote:
Originally Posted by GulfCoastMotorworks View Post
Most likely WGDC cycles are lethargic, pre-turbo exhaust leak, or the WG assembly is leaking.

That is way way way laggy. Most should have a TD06-20g's in the 3400-3900 range depending on model.
A PTE-6262 or HTA86 spools faster than that.
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Old 06-14-2013, 03:41 PM   #25
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PM gabedude he is extremely knowledgeable about kinugawa/turbos .
hopefully he isn't to busy to help you . good luck .
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