Precision 5431 or 5831??
Which turbo?? Looking to only make 400hp on a b16a. Need a fast spooling turbo to make 400hp but not have the turbo work too hard. Both turbo are mfs. I got a couple of buddies running the 5431, one of them is making just a little over 400hp on a dyna pack dyno on 18-21 psi on a lsv. Any info or feed back with either turbos will help make me make my decision. Thanks.
Um, Little hint man, Your a little vague in your question. Need some more info on your engine. Stock,Built,purpose? Leave out the psi referral!!!! There are several other questions that might be asked. This is all that I can do for you. Good luck on your endeavor!!!!!
81.5 forge pistons, b16a. Daily driver.
Wiseco 81.5
Eagle rods
Victor x mani
Gsr cams
Tial 44 gate
Tial 50 bov
Brms top mount, etc...
Both turbos are capable of producing the power goals I want at 400whp. Just want some Insight on which turbo will make that power easier with less boost. Atm I have a precision 4831. I'm looking to upgrade.
Wiseco 81.5
Eagle rods
Victor x mani
Gsr cams
Tial 44 gate
Tial 50 bov
Brms top mount, etc...
Both turbos are capable of producing the power goals I want at 400whp. Just want some Insight on which turbo will make that power easier with less boost. Atm I have a precision 4831. I'm looking to upgrade.
*edit* 5831. My brother and and friend both had their cars tuned this weekend with that turbo. Bros made 355@12 psi stock b16a. The other was a d16 vitara build, made 470@20ish I think it was. Great spooling street turbos.
Last edited by utahturbosohc; Mar 17, 2013 at 09:30 AM.
Could you please Verify those numbers? 355 by 12psi is something that's flowing over 60lbs/min at under 1.8pressure ratios. That turbo can't do that by design. a boost/rpm curve would be best. Until then... I'm horribly skeptical that occurred.
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Eeerrrrr, my bad, 5831 is what I meant to type.
if im not mistaken both the 5431 and 5831 uses the same exhuast and compressor housing, what puzzels me is that why there's a power differences between the two, different compressor wheel design? the price difference of the two is 100 bucks. decisions decisions...
the only experiance i've had with the 5431 is on a GSR turbo (goautoworks log manifold)... really ran out of steam after 400whp.
So we stopped there. I'm sure a better flowing manifold would help a little.
if your using on b16 for your 400whp goal just get the smaller 54mm 5431.
So we stopped there. I'm sure a better flowing manifold would help a little.
if your using on b16 for your 400whp goal just get the smaller 54mm 5431.
Those are some pretty good numbers, I'm leaning more towards the 5431 because of price, but as u stated the 5431 seems to run out of air, I'm just curious if the 5831 will make more power at the relatively same boost as the 5431.
gotta understand cfm generated per psi will be different for each turbo, so generally Yes the 58 will make more topend power over the 54, but i doubt the 58 would have a broader powerband than 54.
if this helps I had a 11:1+ CR b16 on e85 on a 6031 Precision with a .63 housing full boost around 5,000rpms and a 6031 is a larger turbo than either choices.
https://honda-tech.com/forums/forced-induction-16/e85-stock-block-ctr-pistons-boost-dyno-graph-3018979/
https://honda-tech.com/forums/forced-induction-16/e85-stock-block-ctr-pistons-boost-dyno-graph-3018979/
Nice numbers, damn this is yet changing my mind again. if the garret 60-1 big wheel was cheaper, I would of got that one, put because of price these two turbos are giving me nuts.
Damn those are pretty good numbers for a b16, my old gsr stock bore with a mini-ram and 60-1 stage 3 wheel. 63 housing on 13psi made 355hp and 230ish torque on RLZ's dyno for reference. If I were you "deuce fc" i'd go with the 5831.









