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astonmartian · 11-19-2019, 06:17 PM

UPDATE - UPDATE - UPDATE

Ok so doing my nut and bolt check before the last lock city drift event of the year, I had the thought (at 12:15am) to check the other nuts on the turbo to manifold. I was having an issue with the rear nut backing out. I'd cinched it down and car ran much better so figured that was it...

It wasn't.

I've now learned that 'locking tabs' are great at preventing the nuts from falling off the stud but DO NOT prevent them from loosening and just hanging out, with the appearance they're tight. Like the front two nuts were. SMH.

Tightened those up with a couple custom cut box wrenches and BAM! I HAVE TORQUE.

Yes, it was dumb cold on the drive down to the drift event (26 degrees when I left at 630am) however I was goosing it and hit 16 psi at 3800 rpm in 5th ...I was like hmmm... So i turned down the boost target on the controller and let fourth rip. And she RIPPED - full boost by 4100 or so. Unreal having literally driven this for 2 years with an exhaust leak that because it didn't get worse, i thought it was setup related. The biggest change is the immediate throttle response and torque. The car starts moving fast now, with the rpms slowly moving. Before, it was very linear (see dyno) where more rpm meant more shove. Now she just mooooves.

Big shout out to Martin who kept pushing me that something was wrong w the setup. I'd turned just about every last bolt or diagnostic and it was right in front of me the whole time. I think having the car like that when i got it, gave me the false impression that was just the setup.

Made the drift day a whole lot more fun. You can watch the recap on my shit youtube channel here: http://bit.ly/JSlcd2019

@Thursday7 - I'm tending to agree. I had a 2016 340i and the silvia at the same time for two years and while the bmw was lighting quick to boost, like so much so it was just a single indistinguishable powerband, it missed the drama of the silvia, even in all her laggy glory. The b58 is soo smooth but my god the silvia is eventful when you mash it, by comparison.

Having the same debate right now with my dad who has a 98 c4s with a circa 2001 protosport twin turbo kit where they literally bolted the turbos where the muffles are (were) with some airResearch turbos (garretts). The car fucking mobs with all the on/off power delivery of a low comp 993 turbo pushing 400+awhp. Spoke w the protosport guys and they said they could upgrade for a more linear power delivery at earlier rpms but not sure if that would detract from the period correct hot rodness of the current setup.

11-19-2019, 06:17 PM	#26
astonmartian Join Date: Jul 2017 Location: Boston Posts: 36 Trader Rating: (1)	UPDATE - UPDATE - UPDATE Ok so doing my nut and bolt check before the last lock city drift event of the year, I had the thought (at 12:15am) to check the other nuts on the turbo to manifold. I was having an issue with the rear nut backing out. I'd cinched it down and car ran much better so figured that was it... It wasn't. I've now learned that 'locking tabs' are great at preventing the nuts from falling off the stud but DO NOT prevent them from loosening and just hanging out, with the appearance they're tight. Like the front two nuts were. SMH. Tightened those up with a couple custom cut box wrenches and BAM! I HAVE TORQUE. Yes, it was dumb cold on the drive down to the drift event (26 degrees when I left at 630am) however I was goosing it and hit 16 psi at 3800 rpm in 5th ...I was like hmmm... So i turned down the boost target on the controller and let fourth rip. And she RIPPED - full boost by 4100 or so. Unreal having literally driven this for 2 years with an exhaust leak that because it didn't get worse, i thought it was setup related. The biggest change is the immediate throttle response and torque. The car starts moving fast now, with the rpms slowly moving. Before, it was very linear (see dyno) where more rpm meant more shove. Now she just mooooves. Big shout out to Martin who kept pushing me that something was wrong w the setup. I'd turned just about every last bolt or diagnostic and it was right in front of me the whole time. I think having the car like that when i got it, gave me the false impression that was just the setup. Made the drift day a whole lot more fun. You can watch the recap on my shit youtube channel here: http://bit.ly/JSlcd2019 @Thursday7 - I'm tending to agree. I had a 2016 340i and the silvia at the same time for two years and while the bmw was lighting quick to boost, like so much so it was just a single indistinguishable powerband, it missed the drama of the silvia, even in all her laggy glory. The b58 is soo smooth but my god the silvia is eventful when you mash it, by comparison. Having the same debate right now with my dad who has a 98 c4s with a circa 2001 protosport twin turbo kit where they literally bolted the turbos where the muffles are (were) with some airResearch turbos (garretts). The car fucking mobs with all the on/off power delivery of a low comp 993 turbo pushing 400+awhp. Spoke w the protosport guys and they said they could upgrade for a more linear power delivery at earlier rpms but not sure if that would detract from the period correct hot rodness of the current setup.