best turbo setup for 350-375whp
like the title says i am wanting to make 350-375whp with around 12-15psi. i had a bnr stage 4 and it just didnt cut it and i dont want to max out the turbo just to make my goal. i would love as little lag as possible as i want this setup for kind of a all around toy...drifting,drag,autocross,etc...I've been doing research but just figured id get some other peoples inputs
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Originally Posted by t2ae
(Post 11414574)
like the title says i am wanting to make 350-375whp with around 12-15psi. i had a bnr stage 4 and it just didnt cut it and i dont want to max out the turbo just to make my goal. i would love as little lag as possible as i want this setup for kind of a all around toy...drifting,drag,autocross,etc...I've been doing research but just figured id get some other peoples inputs
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Gt35r
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the stage 4 should have gotten you near there, if not then something is wrong with your setup.
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Originally Posted by RotaryEvolution
(Post 11415232)
the stage 4 should have gotten you near there, if not then something is wrong with your setup.
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we'll see what my home brew s5 hybrid puts down when i go to the dyno in a couple weeks (idk what wheel trim it is, is got a 59-60mm inducer), its fairly similar to the bnr stg4, but i'm running ~18psi on a stock s5 keg. i'm hoping for atleast 320whp.
my car is hitting 7-10psi @ 2200rpm, I think for faster response i would need a supercharger |
i see were hes coming from i got rid of stg 4 too i felt like i was pushing it too much perfect turbo for under 350whp . i got a borg warner s360 now i want over 400whp got bord of the 300ho range
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the stage 4 and up(additional options) are fairly laggy compared to the stage 1 and 2. but for a bolt on turbo they do just fine.
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Originally Posted by bmwrx7man
(Post 11415753)
i see were hes coming from i got rid of stg 4 too i felt like i was pushing it too much perfect turbo for under 350whp . i got a borg warner s360 now i want over 400whp got bord of the 300ho range
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or it keeps going through motors. the FC engines are weak beyond about 350whp without internal upgrades.
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Originally Posted by RotaryEvolution
(Post 11415909)
the stage 4 and up(additional options) are fairly laggy compared to the stage 1 and 2. but for a bolt on turbo they do just fine.
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i don't feel like going into it again, the s4 turbo isn't THAT different from the s5.
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Originally Posted by RotaryEvolution
(Post 11416091)
i don't feel like going into it again, the s4 turbo isn't THAT different from the s5.
On a side note i was never really sure if the "twin scroll" actuator/flap was working correctly on my s4 setup. That may or may not have had something to do with the difference in spool time, they were still close but the difference between the two was noticeable with the larger compressor. |
Originally Posted by RotaryEvolution
(Post 11416066)
or it keeps going through motors. the FC engines are weak beyond about 350whp without internal upgrades.
What's a safe power goal on a stock port built s4 block with stronger aftermarket seals? 325whp stage 2 bnr? |
i've seen engines lose irons even at 300whp if the tune isn't setup correctly or any of a hundred issues pop up down the road.
studding the block is probably the easiest method versus dowelling which i would say isn't quite as strong. |
Originally Posted by RotaryEvolution
(Post 11416551)
i've seen engines lose irons even at 300whp if the tune isn't setup correctly or any of a hundred issues pop up down the road.
studding the block is probably the easiest method versus dowelling which i would say isn't quite as strong. How much does it cost to stud one? I've seen 400+ whp on stock engine before long time ago from some guy j-rat I think his name was with a 10ae. Wonder how much abuse it took before giving.! |
there have been a few cases of people getting over 500whp from unopened blocks. but the way i see it and have experienced, unopened blocks have better holding grip than a rebuilt fresh engine does, with slicker clean mating surfaces.
studding and dowelling all range from about $350-700. it's not absolutely necessary but it is a safeguard. usually pushed more on people aiming for over 400whp. |
didnt really have any complaints with the turbo honestly i just felt i was pushing it and stressing it to get me near what i wanted. great turbo and really not laggy at all! i just would like to make 350whp"ish without stressing the turbo or motor too much.
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what were you running for boost pressure??
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Originally Posted by t2ae
(Post 11418662)
didnt really have any complaints with the turbo honestly i just felt i was pushing it and stressing it to get me near what i wanted. great turbo and really not laggy at all! i just would like to make 350whp"ish without stressing the turbo or motor too much.
Video Link: http://www.youtube.com/watch?v=Y5oTCnGgqvY it made 339whp and 252wtq and nothing was "wrong" with my setup to my knowledge How much boost were you running? I believe the stage 4 is good up to 18psi but don't quote me |
17-18psi
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was it on a dyno jet?
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problem probably lies with the Rtek, no offense to them or you but it is probably the least capable "EMS" out there and i simply don't trust it to make peak performance from most any setup. hopefully they also made it able to adjust multiple cells at the same time, i was getting carpel tunnel from tapping that palm pilot.
J-rat i believe ran his stage 4 up to about 415whp before the turbo gave up due to the 2 step and i've personally tuned a stage 4 that put out more at just 12-13psi. of course changing the turbo is probably cheaper than buying a new standalone. if it was a mustang dyno then that is probably one reason why it seems low. |
Originally Posted by gear_grinder
(Post 11416104)
From my experience running both turbos, the s5 is less laggy. especially when paired up with a larger compressor. stock to stock its almost undetectable because the compressor is so small. larger compressors & housings seem to show a more noticeable difference IMO/E. A compressor w/ a 60mm inducer with low AR reaching full boost (18psi) @ ~3k is pretty damn good.
On a side note i was never really sure if the "twin scroll" actuator/flap was working correctly on my s4 setup. That may or may not have had something to do with the difference in spool time, they were still close but the difference between the two was noticeable with the larger compressor. |
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