JoeNova

L33 (10:1) 5.3 with Isky 218/218 cam, truck intake (switching to Hi-Ram this summer) in my 3300 lb Nova. 3200-3400 stall, billet triple disk converter (4L80e). Will be using a 1.10 T6 housing. Cannot afford billet wheel right now and the class I plan on racing doesn't allow it anyway.

So Cast wheel S476R. Will be 90% street, 10% track. 83mm wheel is $300 cheaper than the 87 or 92, but I don't want to sacrifice too much power. Ultimate goal is to run 5.60/8.99 on 8.5 slicks. I have Multi-leafs and Caltracs. I was leaning towards the 87mm wheel for faster spool on the street/highway, but the 92mm wheel is the same price and might give me a little extra power up top. Its really looking like it'll be a tossup between those two, so I was looking for opinions. Would really like have to full boost (probably no higher than 22 or so PSI) by 4000 RPM. Using HPTuners to tune.

Suggestions?

LILHEMI

92mm all the way.

RonSSNova

iTrader: (3)

I let Martin pick because I plan to footbrake and he chose the 87mm turbine.
Beyond that I know nothing.

JoeNova

Every 5.3 that I know of with the s476 is running either the 83 or 87mm wheel. Even though the cheapest is the 96mm, I haven't seen any 5.3s running it.

JoeNova

Bump. Anyone? Should I stay with the 87mm because I'm going with the T6 turbine?

sbcgenII

iTrader: (1)

You should hit up Jose, Martin, lil john or stock48.

GTO Eric

iTrader: (6)

I'd go with a larger turbine.

I am however running a much larger cam...232/240 .595/.608 115lsa

I'm running the 96mm wheel in a 1.0 T4 housing and have no complaints about spool. Was running a 4L80e with a 3600-4000 stall. It is being replaced with a 3000 next week so I'll be able to see how it spools with that soon.

hellbents10

iTrader: (10)

If you want that much boost early, which I think is just trouble for keeping gaskets in it then the 83. 87 will make more power and the 96 will make more power yet. My 5.3l has a 478 with the 96mm TW and its full in by 5200 which is fine for me as it is never below 5200 when racing.

JoeNova

5000+ rpm is way too high. Thats the last 20% of the rev range for me. I'll have trouble getting off of the line with a 3200 stall with that big of a turbine. I'm leaning towards the 87 right now.

Turbo5.0

Id say do the 96mm even tho you dont have it listed. With that 1.10 housing, the 96mm will still perform well enough to get you to the 5.60 with alot of room for error just in case.

3pedals

iTrader: (3)

I'd do the 92mm, 1.1a/r T6. It will spool just fine and allow room to grow in future. I run that turbine setup on my 6.0

JoeNova

There's a guy with a mustang in the conversion & hybrid section running a similar setup to me. 5.3, roughly the same compression, slightly larger cam. He's running an S480 with the 92mm 1.10 A/R T6 and he's seeing positive manifold pressure by 3000 RPM and full boost around 4200 (16 or so PSI I think). He's running a cheap manual boost controller thats letting his wastegates crack open early. When the vacuum line came off he was building boost a couple of hundred RPMs quicker.

So yes, I'm going with the 92mm 1.10 A/R T6. His spool characteristics are exactly what I was looking for. That still leaves me around 2500 RPM of full boost up top which should be all I need at the track. If things get tricky, an electronic boost controller that holds the gates shut a little better will give me the extra that I need.

And like you said, room to grow.

3pedals

iTrader: (3)

2500 rpm room? from 3000? lol rev that ******!

JoeNova

From 4200. I was talking about how much time I would have in full boost. I'm going to rev between 6400 and 6700 depending on where the cam and turbo hold power.

3pedals

iTrader: (3)

cool.
I was hoping you werent 1 of those guys who feel the need to limit yourself to 6200

LilJohn

Josh castle goes 8.80's and 150+ with a 96/1.32 hotside'd S475 on a 5.3...

Plenty of guys are running them....

stock48

iTrader: (17)

I agree with John that a good S475 is plenty of turbo to go 8's at 3-3300 lbs. mine with the little 83mm turbine and T4 went 8.9/158 on a run where I had to get in and out of throttle at around 100 ' out. Thing Is A 4L80E is like racing with the parking brake on... And a leaf spring Nova is not near as effecient as a fox body mustang like most guys run. The car is going to need to make some steam to run mid 8's, / mid 5's in the 1/8 with that transmission and heavy rear end. I would not go any less than 92mm turbine. I think Jose has a 1.0 T6 housing as well.

Sarg

iTrader: (6)

I am the guy with the fox and the 92mm s480 and honestly it spools ok. No boost controller yet, although I plan to throw my Halman on there. Right now it is just on spring pressure. It is the 1.10 ar turbine housing.

IMPATIENT 1

Im with the staying in the 90's on turbine wheel.i ran a s480 with 1.1 83 & it was done and 5.3 fell over at 6900. Sure it spooled awesome but 83mm turbine is too small on 5.3 thatll see north of 4k

Forcefed86

iTrader: (4)

Is anyone running 8's at 3-3300lbson a cast 75mm unit? IMO you can't group a billet s47x wheel with the cast S47x wheels. Billet hubs are machined smaller so the blades themselves are usually much longer on a billet wheel. So a cast 80mm wheel may have the same blade length as a billet "76" mm wheel. The billet stuff is also usually deeper and a slightly different profile.