90zcrex

Hey everyone, I've got an 08 C6 ls3 and I'm looking at doing a Budget custom rearmount single turbo setup on it, I've read through the rear mount threads and have a pretty good idea of what I need/want.

Question is how fast will the BorgWarner S366 spool on a stock LS3? Looking at probably T4 or T6 housing 1.1a/r for better spool. Hard to find info on anyone using this turbo as a single, Is it too small of a turbine housing for around 700whp? Will it be choking up top?
I'm looking for full boost in the 3k rpm range or close too.

Thanks for the help in advance.

cptinjak

You'll run out before 700whp with an s366. You'd likely see about 650whp absolutely maxed out. The best bet would be to go with a good billet 472 like a batmo or similar and 83mm turbine. t4 1.0 a/r. That would spool very well and make the power you're looking for. If you need to go cast for budget reasons a 475 will work it'll just lose even more spool and definitely stay away from the 1.32 96mm turbine units that everyone has for cheap.

Jack

90zcrex

So what kind of spool differnce would there be in the s366 vs the s475? Given I'm using the 1.1 t4 turbine housing?
I'd really like full boost by around 3-3.5k?

cptinjak

It'll spool a bit slower, but you wont reach the power goal with the s366, so its kind of pointless to compare against. the 83mm turbine t4 1.0 would spool very well.

Jack

s57_s2k

single s366 is too small for a 6.2 L

cptinjak

It would work decently up to 600hp or so, but it won't get the OP to his goal.

Jack

SKULL

iTrader: (7)

get the comp oil less billet 76 and youll be good to go

s57_s2k

s366 is good for 600 hp at 20+ psi not less . ls3 will reach 600 hp at 8 psi or less . so the turbo will choke and overheat the air. he needs a bigger turbo in the range of BW S400 or Garrett Gt42.

rkreigh

sorry but a turbo ls at 600 hp seems like a lot of wasted cash

go 800 or go small blower or Nitrous at that HP level to save some $$

go bigger or don't go at all and run the right turbo?

I'd go with a couple of oiless comps and a more lofty 800 hp flow capacity

or twin s266

cptinjak

Lots of people out there make 550-600whp with an s366 on a smallblock. It's not uncommon. It won't get the OP to his goals though.

Jack

90zcrex

Well my main goal for the car is to have a fun street car, not really looking to hit a particular number atm. Really would just like to see around 600 max of 700 to keep it fairly reliable.
I came from the turbo import world and I really love the feeling of a quickspooling setup over a laggy max power one.
I'm mainly looking for insight on how fast these turbos will spool with a manual trans in an ls3. Most of the dynos I can find are autos which change the spool characteristics.

Reason I'd like to go turbo is most corvette guys go supercharged or nitrous which is definitely the easier route but Id like to be a little more unique. And Turbos sound oh so wonderful. Appreciate all your help.

90zcrex

800 May be down the road but I'd like to take it slow lol. I'm not exactly the typical corvette owner, not just gonna write a check to a shop, I am going to build the kit myself so it will cost a lot less that you think, I think I can get it done around the 3k mark.

90zcrex

How would the Turbonetics TC78 compare with the S475? I see its a bit smaller but looks like quite a few people making over 650 with them.

90zcrex

Looks like the tc78 would be too small on the exhaust side,
Would a 7875 choke badly up top with the 6.2l?

Orr89rocz

iTrader: (13)

F1 wheels seem pretty good. Flow well but the 68mm is alittle on small side for 6.2. The 7875 would be abit better match for a 6.2. Would spool fast with a tighter ar housing option

Forcefed86

iTrader: (4)

On that note... how would the T6 1.10 S475 87mm wheel compare to the smaller 83mm wheel t4 1.10? Does the greater wheel aspect ratio give the t6 the advantage on spool? I'd think the smaller wheel would be working harder...

To the OP...

I'd want a larger exhaust wheel on an LS3. Instant spool on an LS3 will be pretty pointless, it will just spin tires. The S475 T6 1.10 87mm exh wheel turbos can be had for $600 shipped now. Hard to beat that price!

http://www.ebay.com/itm/121290566846?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

90zcrex

So far the plan is:
turbonetics 7875 .96 a/r
BTR stage 3 turbocharged cam 230/235 114+4
Tial 44 wastegate
Tial Q BOV
stock exhaust mani's
2.5" heatwrapped hotside back to turbo
2.5" stainless coldside to intercooler
Treadstone 3.5" intercooler
3.5" alum piping from intercooler to TB
Turbowerks scavange pump
tap'd valve cover for oil return

Any input?

cptinjak

Way too many variables to give you a definite answer. The smaller wheel will definitely spool faster in most applications, but depending on the power goal, engine size, etc, either one might be a better fit than the other. Really would need to know a specific application to say for sure.

Jack

LJMSJohn

That line of turbo cams was not designed for square port headed motors.

90zcrex

So I'm guessing I should contact someone and get a cam spec'd out, the only ls3 turbo specific cam I've seen is the Tick line. I was hoping to get a cam that I could throw in and make good power N/A, Which this cam is very close to the spinmonster spec'd N/A cam, but still make good power once I go turbo.