Bnr k04-gt28
#751
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The GT2871 already maxed out the stock K04 compressor housing, requiring a different one be used. Not sure if there's any room left to machine the exhaust side to fit.
Contact him and find out.
#752
this pump....
thats my upgraded 255lph pump. Might not be necessary for everybody, but I did it since I rather have more than less..........especially on my current build. Plus I might end up using that fuel line to feed Port Injection on the manifold, if I need more fuel
thats my upgraded 255lph pump. Might not be necessary for everybody, but I did it since I rather have more than less..........especially on my current build. Plus I might end up using that fuel line to feed Port Injection on the manifold, if I need more fuel
#755
I believe its the universal pump. One shop modified it for me. They already done several for sky/solstice crowd.
let me know if you're interested, I'll provide you with name and contact info. They also do "core" exchange program
let me know if you're interested, I'll provide you with name and contact info. They also do "core" exchange program
#758
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I have said this plenty of times before and i will say it again. DO NOT use a large single scroll turbo on the stock manifold. It doesn't work. Something about the twin scroll dividers in the stock manifold makes the turbo VERY laggy. If you dont believe me then have fun not seeing boost until 5000 rpms.
#759
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I have said this plenty of times before and i will say it again. DO NOT use a large single scroll turbo on the stock manifold. It doesn't work. Something about the twin scroll dividers in the stock manifold makes the turbo VERY laggy. If you dont believe me then have fun not seeing boost until 5000 rpms.
#760
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oh im sure the GTX wheel will help SOME, but its a waste of money on the stock manifold. For $325 you can get a custom exhaust manifold from vulcan turbo and call it a day. I really don't know why more people havent done more custom turbo kits on their ss/tc. I have about $900 into my turbo kit which is precision 5457 turbo, O2 housing, custom exhaust manifold, and oil/coolant lines. These BNR turbos do sound pretty interesting tho and Im positive they will be great, i just dont want spool up so fast. Plus i want well over 400whp
#761
I have said this plenty of times before and i will say it again. DO NOT use a large single scroll turbo on the stock manifold. It doesn't work. Something about the twin scroll dividers in the stock manifold makes the turbo VERY laggy. If you dont believe me then have fun not seeing boost until 5000 rpms.
I am using the stock exhaust manifold with BTF's GT3582r and full boost (28psi) at 4400rpm....which is not bad for a 2 liter engine
#762
Yeah i knew that the GT30 was laggy when btf made the kit. i wasnt sure if the GTX series wheels would help with that issue or not? Ill prolly end up getting the BNR stage 2 once i see the numbers. it will prolly have a way better spool time also. I was just curious about it thats all.
I spoke to the garrett techs at SEMA....and they told me that the GTX will not spool any faster compared to the GT-R series.
The advantage of the GTX turbos is basically higher top end power (10% more) compared to GTR.
So basically, a GTX3071R turbo will spool like a regular GT3071R turbo...........but the top end power will be similar to a GT3076R turbo.
on the other hand, the Borg Warner EFR turbo's due to their "gamma ti" turbine wheels which are 50% lighter compared to a regular turbine wheel....results to a 1:1 turbine/compressor weight ratio......which makes that turbo have a faster response compared to BB turbo. A regular BB turbo is around 2.4:1 weight ratio.
#763
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I have said this plenty of times before and i will say it again. DO NOT use a large single scroll turbo on the stock manifold. It doesn't work. Something about the twin scroll dividers in the stock manifold makes the turbo VERY laggy. If you dont believe me then have fun not seeing boost until 5000 rpms.
#764
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That to high of an rpm for me lol. I thought u would make more power at 28 psi and having a bigger turbo then i did with a 2871 at 26psi. With the old 2871 i hit full psi around 3600 to 3800 rpm.
#765
Unfortunately, HPT doesn't have the tables needed to get things right
I think, if I go with HPT-trifecta combo, 500 whp will be achievable.
really no need to go 500whp, on a stock block since I'll just ruin stuff.
Plus a RWD car (SKY) gets more drivetrain loss compared to FWD cobalts.
I'll do everything right this time around on my current build. Use Trifecta-HPT combo, and add Port Injector/secondary fuel rail/4 - 60s injectors. Hopefully that will be enough fuel delivery..... but we'll see. We're all playing on unchartered territories
Lots of things to discover, and see what are the limiting factors......
#766
#768
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SHOULD is the word.
Unfortunately, HPT doesn't have the tables needed to get things right
I think, if I go with HPT-trifecta combo, 500 whp will be achievable.
really no need to go 500whp, on a stock block since I'll just ruin stuff.
Plus a RWD car (SKY) gets more drivetrain loss compared to FWD cobalts.
I'll do everything right this time around on my current build. Use Trifecta-HPT combo, and add Port Injector/secondary fuel rail/4 - 60s injectors. Hopefully that will be enough fuel delivery..... but we'll see. We're all playing on unchartered territories
Lots of things to discover, and see what are the limiting factors......
Unfortunately, HPT doesn't have the tables needed to get things right
I think, if I go with HPT-trifecta combo, 500 whp will be achievable.
really no need to go 500whp, on a stock block since I'll just ruin stuff.
Plus a RWD car (SKY) gets more drivetrain loss compared to FWD cobalts.
I'll do everything right this time around on my current build. Use Trifecta-HPT combo, and add Port Injector/secondary fuel rail/4 - 60s injectors. Hopefully that will be enough fuel delivery..... but we'll see. We're all playing on unchartered territories
Lots of things to discover, and see what are the limiting factors......
#769
Senior Member
#770
Im really hoping that an aftermarket exhaust mani is one of those limitations.
although he's not manual, "project scarab" has a solstice gxp with an aftermarket tubular exhaust manifold, bigger turbo, GM race block, headwork, valves, water/meth, etc...........even at 28-29psi.....is struggling to get 450whp. I think he's around 400whp, right now.
They have been tuning it, but the bullseye turbo, broke.
I'm surprised that the aftermarket tubular mani he has....didn't really give him the power I was expecting.
Although, they're not FINISHED with dyno-tuning.........
I'm still hoping that he gets 500whp tho......
although he's not manual, "project scarab" has a solstice gxp with an aftermarket tubular exhaust manifold, bigger turbo, GM race block, headwork, valves, water/meth, etc...........even at 28-29psi.....is struggling to get 450whp. I think he's around 400whp, right now.
They have been tuning it, but the bullseye turbo, broke.
I'm surprised that the aftermarket tubular mani he has....didn't really give him the power I was expecting.
Although, they're not FINISHED with dyno-tuning.........
I'm still hoping that he gets 500whp tho......
#771
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Just over 5 secs on pump (this is including some spool up time tho, still stabbing at 58ish and takes a second to pick up). And just over 4 with the last revision. If he did a pull from just under 55 and I took the measurements at 60-100 it would be more impressive but we call that "cheating" so Im keeping consistent!
I could only run like 13 or 13.5* peak on 23psi with the 91 octane. We're over 20 now but Im taking it a bit easy moving it up and keeping an eye on things
I could only run like 13 or 13.5* peak on 23psi with the 91 octane. We're over 20 now but Im taking it a bit easy moving it up and keeping an eye on things
#774
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Just over 5 secs on pump (this is including some spool up time tho, still stabbing at 58ish and takes a second to pick up). And just over 4 with the last revision. If he did a pull from just under 55 and I took the measurements at 60-100 it would be more impressive but we call that "cheating" so Im keeping consistent!
I could only run like 13 or 13.5* peak on 23psi with the 91 octane. We're over 20 now but Im taking it a bit easy moving it up and keeping an eye on things
I could only run like 13 or 13.5* peak on 23psi with the 91 octane. We're over 20 now but Im taking it a bit easy moving it up and keeping an eye on things