Roar

iTrader: (2)

Hi, I have been searching here and on Turbomustangs.com for a couple of days, but cannot seem to find an answer to my "simple" question.

I have a '02 LS1 which is going into an Offroad race car - probably on E85.
I also have an Holset HX60 sitting in my garage......
The engine will be built with good internals. Shooting for 800-900 crank HP.

The question is: Will the HX60 ever spool on my 346ci LS1?
....or should I go for 383ci to make it spool sooner?
....or is it just too darn big?

Thanks from Norway!

Beaflag VonRathburg

iTrader: (176)

I've been doing a lot of research on holset turbos recently. Information about them is very difficult to find. What I did find though about the HX60 are the dimensions and the fact that it can flow .95 kg/s. That's equivalent to 125.663 lbs/min. As an estimate, each ppm of air delivered developes 10.86 hp.

125.663 x 10.86 = 1364.70018hp

That's a lot! Granted that's absolutely maxed out and theoretical, but it gives you an idea. I don't have an idea on the A/R or what size the turbo works out to be so it's difficult to give advice. The only variables I have to judge on are the flow and pictures I've seen of it. Here's my limited opinion so take it with a grain of salt. From what I've seen these are rather large turbos. I don't know how efficient the wheels in these are. I'd say from seeing the flow numbers and physical size of them I think they'd be suited more towards a 40x+ cubic inch build. I think a 383 might do well with it, but would have to be wound out pretty high to take advantage of it.

Dimensions:
Length mm 280
Width mm 285
Height mm 237
Smallest Mass kg 18
Largest Mass kg 22
Airflow kg/s 0.95

Roar

iTrader: (2)

Yup, this sure is one huge turbo.

I have not been able to find any compressor maps for it either and was hoping that somebody on this board had some experiences with it.

This is a race only vehicle so I can live with a high stall converter so rpm should not be an issue. I was hoping to make boost around 3500rpm or so.

I will need almost instant throttle response from this setup so I will probably give it a shot of nitrous to get it going as well......

I would sure appreciate any other opinions.

Thanks.

chuntington101

TRY IT THEN SHOW US PICS!!!!!

the holsets are popular 'junkyard' turbos over here (Europe) but are actually pretty good turbos! think i heard they are similar to Garretts GT series stuff.

got any pics of the car??

Thanks Chris.

Roar

iTrader: (2)

It is going into this vehicle.....


I am currently running a N/A 580 CID Chevy at 866hp + 200 NOS but the engine is so darn heavy....

I am going to have a friend laser cut some exhaust flanges for me so I can start building the headers.

Since the LS1 engine is complete now I am seriously considering putting the turbo on the stock engine and installing it on a Dyno and make a "light" pull just to see when it starts to make boost. (I have another friend who has a Dyno)

DrTurbo

iTrader: (3)

Holsets are not performance units by any stretch. They are comparable to Garrett turbos from the mid 80's. They are slow spooling and lack aerodynamics that improve power and spool capability of the new chargers out now.

Beaflag VonRathburg

iTrader: (176)

I just got this in the mail today:





It's a Holset HT3B. I anticipate it being rather laggy. It's from 1987 = older than me. I'm going to clean it up and do some polishing before I send it out anywhere, do you guys carry parts to modify these? Wheels and housings particuarly? Is there any way to cut down on the size of this thing too? It's over 13 inches long.

I'm also trying to figure out if it's a T4 or T6 flange. I was using the measurements off of your site and some of them match the T6 and others the T4 ones. I guess back in 1987 they did things a little differently.

wicked@boost

depending on the model you have: the compressor inducer diameter is either 76mm or 81mm.

you should be fine running that turbo, i think it will spool around 3500-3800 rpm.

stevieturbo

A lot of the Scandavians use Holset turbos. RedVictor, worlds fastest street legal, pump gas car ( 7.67 at 189mph ) uses a pair of Holset blowers.
Im sure I read somewhere, or was told, that a lot of modern Holset's also use the similar "tall" style compressors that BW are now offering. No idea if its true or not.

Roar

iTrader: (2)

OK, time to bring this thread back from the dead.....

The setup is built and I have used the car for a couple of races. It makes a lot of power, but not exactly like I want it to. I would like the power to come on faster.... My plan with the nitrous to speed up the turbo is not working because it becomes very tricky to drive.

I am considering changing the turbo to a different unit or going with a screw type supercharger during the winter.
Any body have a suggestion to what I should choose?
My engine setup is like this:
LS1 at 383 cid.
Forged crank, rods and pistons.
Patriot LQ9 stage II heads, 72cc. Compression at 10.0:1
LS6 intake, stock ported TB.
Cam: Crane with 581/588 lift.
Custom headers and T6 flange, 50mm WG, 4" downpipe
Aftermarket fuel rails and 75lb injectors
E85 fuel

I need 800-1000 crank HP

Picture of the engine bay:

stevieturbo

Unless you have 16 of those injectors, they will not support the power you seek on E85.


Why no intercooler there ?

What sort of racing are you taking part in ? Transmission etc ? What sort of rpm band do you need ?

Sluggish

iTrader: (10)

Since this is a custom build and you probably have the room I say put a Kenne Bell 2.8h on it.

Roar

iTrader: (2)

Although I have not been on a dyno with this car my feeling of power compared to the 866 HP NA BBC I had before is very similar.

Injectors - the ones I have are rated 75lb at 43.5 psi so at 60 psi base pressure they should be just over 80lb. I am running a boost referenced regulator and in my type of racing we run only a few seconds at full boost so I can live with 100% duty cycle......
My calculation is that they will hold up to 970 hp or so on E85.

I run a TH400 transmission with 9" converter at around 4500 rpm stall.
I need as much power as possible all over the powerband, but 3000 - 6500 is the most important area.

No intercooler because of very little airflow and fear of damage during a rollover (which happens all the time).
I do have a water injection system installed which I run with about 40% meth.

Type of racing....take a look at this: http://www.youtube.com/watch?v=EFtjWrUhavY

This is not my vehicle, but a friend of mine with a LS1 on spray during a race three days ago
...and I had a couple of similar rollovers during the same race......