Tangential vs On Center (searched)

[Chezedik]

So I have searched for this by post body, and found nothing. I know what it means, what are the benefits/losses from either. I know it affects spool, but how?

[hannibal]

I'd guess that the tangential housing would spool faster, but not by any significant amount. I think the biggest difference would be clearance of the housing to the motor, brake MC, frame, etc.

[virus77]

ive read somewhere the on center is about 1-2% slower, so I guess its really a matter of what fits the application the performance difference isnt big at all.

[Craving4Boost]

So I have searched for this by post body, and found nothing. I know what it means, what are the benefits/losses from either. I know it affects spool, but how?

maybe cause the air comes in at an angle for the tangential and that helps put the exhaust gas in a better position to spin the turbine. that would be my guess

i have never heard of someone having clearence issues of the MC with the on-center

[S14tat]

if you look at the inlet port sizing on both of them, you will notice that the tangential housing has a larger port. also the angel or approach for the exhuast gas is better for the tangential. so bottom line, the tangential housing will have better spool up and better top end flow if they are the same a/r.

the only reason that someone would choose a on center over a tangential is because of clearance issues.

[Craving4Boost]

tat - do you have some pictures on how well your on center turbo clears the MC?

[Structure240sx]

tangentials are more effiencent, flowing better with more of a striaght shot for the exhuast gases. on-centers have to go around a curve instead of striaght

[Chezedik]

Thanks guys, I just am always curious. Of course, mine in tangential but wanted to know if there was a difference that extended beyond clearance.

[S14tat]

this is a really old pic with my old setup, notice i got this giant heat shield over my turbine and it still clears the MC

[Chezedik]

What mani and with which housing?

[S14tat]

its a rev hard with a T04B on center housing with a .58 a/r my new setup is has a .69 a/r and it still doesn't make much different.

[Chezedik]

Is that actual Greddy BOV or XSPower?

[turbo2nr]

wow tat your setup is old in that pic. man alot has changed since then. that was like two summers ago...i still havd the probe lol..

btw his bov is a greedy...

[S14tat]

actually turbo2nr that pic was taken that day at ben's house when you just bought your kouki. so its only 1 summer ago, also that is a real greddy type S. i got it like 2 years ago and i had a RFL for the first year i had the car boosted. the car hated running VTA so i had to get a nice BOV that gives me the option to recirculate.