a.white86

iTrader: (5)

I was advised by two different people (very very reputable) to run the BW billet 84mm, 96 wheel that comes with it, race cover, and the 1.58 AR housing, for my 408" motor.
My question is, all I can find on here mostly is guys running the 1.32 AR housing.. But I know the white Foxbody (Can't remember the name) is running his 7 second street car on this turbo.

I 100% take their knowledge to heart and will follow their guidance, but I'm just curious why I haven't seen a ton of 1.58 AR setups on here (or maybe i've just overlooked them).

a.white86

iTrader: (5)

Nobody knows anything about these things?

SwampWS6

iTrader: (7)

Maybe because of the amount of cubes you have most run 1.32s. Do you really need 1.58ar? Im no expert by any means. List the reasons why you need a 1.58 or give a mod list

meatheadgn

iTrader: (1)

I use a Borg Warner 88 mm turbo with a 1.45 AR housing on my 408 and it seems to work very well. I have never ran a smaller AR on this engine to compare to but the engine pulls hard up to 6800 rpm and does not have any evidence of "choking" down. I have ported LS3 heads, Tick Cam, 9.5:1 compression, Victor Jr, etc.

The main reason I went with the 1.45 is a got a great deal on the turbo but I would use that again.

a.white86

iTrader: (5)

408" built motor, LQ9 block. Worked 317 heads, motor is good to 20-23psi.
TH400, full suspension, etc.. Trying to go low 5's at 3300lbs.

My camshaft was spec'd by the same guy who spec'd the 1.58 housing, then another spec was made for me by a different guy and he said the same thing.

I just wanted to know if anyone knew anything about it. How well it spooled up driving around.. etc.

turboventura

The 1.32 is the standard housing and I'd say most of the builds on here are 5.3 or 6.0's hovering between 800-1000 horsepower at the flywheel. If you have more cubes or want more power that's probably the reason for the bigger housing.

a.white86

iTrader: (5)

I see..

Well, My knowledge is limited, as this is my first turbo build. Was just curious as to what people's opinions on the big housing was. Mine is similar to a buddy of mine's car build, and his made 840 on pump gas, and about 1100 on race gas. Slightly smaller turbo than i'm going with though..

35thsscamaro02

I would also love to know more about spool on street with a 1.58ar. Let's say 10:1 418ci.

00duvall

iTrader: (7)

Look up toyota tacoma on here it is close to ur setup i think its on a 1.32 ar. Mi,e will be a 1.32 ar also. 408 mast heads 9.5 cr and btr stage 4 cam. If u want 1.58 call forced induction or huron they can help u

Huron Speed

iTrader: (1)

thanks for the recommendation!

OP, shoot me an email if I can help, we are a forced inductions dealer!

Casey@huronspeed.com



-Casey

Heavy H.P.

I know it's probably easier to help him via email. But i'm watching his build like a hawk, so i'd like to know the answer to his question my self.

Sarg

iTrader: (6)

My guess would be that that 96mm wheel is the limitation on that particular turbo and they want the larger housing to get the most possible out of that turbine while limiting the compressor as little as possible.

a.white86

iTrader: (5)

Thanks bud I appreciate it.

Hey man I'm about to go throw some pics up in my build thread from paint the other night. Engine bay looks amazing now..
Ahh I see what you're saying. So using that huge housing is just maximizing the potential of the 96 wheel..

Kmspeedie

iTrader: (1)

well all i know is i wanted quick spool on the strreet, i have a 416 witha t4 s480 billet 1.25ar and liljohn said it should be good to 9-1k wheel... thats alot considering all that air im shovin thru that thing... and it hassa compact cover not even a race cover

Ratical

iTrader: (82)

That's what I figured too.

I am curious myself to see a guideline where the 1.58 would take over as being more efficient. Like a cubic inch limit, rpm or even boost psi? I know every combo is different, but a general idea. I was surprised not more people especially with the 400+ ci builds are not going with the 1.58.

Heavy H.P.

They should come in here in explain it since there is a ton of us that want to know the answer.

Superman09

iTrader: (65)

The limit of these turbos will be the 96mm turbine wheel first as mentioned. The 1.58 housing will allow you to push it a little farther if you are near or at the limit of the turbine wheel. It will bump the power band up farther in the rpm range which can help a little if you are seeing the limit of the wheel falling off slightly early. Larger housing is somewhat of a band aid fix to too small of a turbine wheel but it certainly can help! More cubes coupled with high rpm would benefit from the larger housing. On a 408 you are at the teetering point of 1.32 or 1.58 depending on the rest of the setup. All it will really do is allow more exhaust in the housing moving your power band up in the rpm range which can help if your power is falling off earlier with the 1.32

Ratical

iTrader: (82)

Thank you, that makes sense. I see Lil John post up a couple of times how the .96 turbine was the limiting factor on these new turbos and he wishes Forced Inductions would finish the research on the 1.0 wheel development to take more potential of the new compressor wheels.

LILHEMI

i have the new billet S484 in a 1.32 96mm turbine on my 408 and it spools pretty quick. i thought about getting the new 1.58 but john bewley told me the turbine wheel itself was the restriction and when jose gets the new turbines in i should be first in line.

a.white86

iTrader: (5)

Ahh ok cool man.. By chance Ya go any video of your car driving around or really anything?

Bewley did my cam, and has helped me with a lot of my other parts.