A few years ago, a friend of mine built a turbo B18B. It was a pretty simple setup basically consisting of a forged piston/rod bottom (8.5:1 comp.), stock head, and mostly Ebay turbo parts. Turbo was a Ebay t3/t04e.

On a dynojet (Trackmasters in Alabama to be exact), the car put down 303whp and 278ft./tq. @ 20psi. Drove like an absolute monster on the street. Went 11.65 @ 118 on slicks in the quarter. All on pump gas before it finally dropped a valve one morning when he left for school.

How was so much torque achieved? Is it the amount of boost or is there more to it?

Looking to replicate this with a similar setup which is why I'm asking.

 

smaller turbine housing/wheel selection with an LS motor

 

Horsepower probably peaked early due to reason mentioned by project_dc2 and redline was probably near stock'ish.

 

Correct, the car was never shifted past redline.

If I was looking to accomplish this same effect, would a basic t3/t04e .50-ish trim work or am I looking at even smaller than that?

Basic goal is to make 300whp and as much torque as possible, pump gas on a t3 flanged turbo. Motor is a piston/rod B18B with built valvetrain/stock cams.

 

Whats with the torque fascination? What are you building the car for street, drag etc?

 

because having a powerband is a good thing.


I don't know where it got started but honda people run big *** turbo's on street car for some reason.

 

if your doing valvetrain add a cam to extend the powerbandto 7500-8000 rpms, since you said powerband.

a .63 50 trim would get what you wanted or if you don't want to rev over 7k then a .48 50 trim would do the trick .... if you look in the ls-t thread there are plenty of setups in there like you described

the i've seen over 400 out of a .48 50 trim so people who say the .48 will choke the top end haven't run it on a car that isn't high revving, if you don't believe me check out srt4 forums about the neons running 50 trims

im not saying a .63 can't make more power than a .48 but i am saying you will probably have a better overall powerband with the .48 and changing hotsides is easy and cheap so.....

good luck i love ls-t setups for daily's and cars that are driven alot on the streets because IMHO torque is really important with cars driven alot because you don't want to have be revving really high, being super loud, and getting attention all the time, especially if there are a lot of bored cops where you live

a BW s256 or 258 would work awesome on an ls IMO as well
i've yet to see someone do it yet but i bet it would make a really badass setup for for daily's and cars that are driven alot on the streets

 

Just want a good powerband. For example, the guy I'm speaking of switch to a 2.0 LS/Vtec with a t3/t67h.o. after this setup and I could've cleaned my house in the time it took him to get into boost from a low rpm. Granted it did make 613whp at T1, but I personally couldn't deal with the lag.

It's gonna be pretty much a full time street car that prob rarely see's a track unless I get curious to see how fast it can go.