And you guys thought kevins turbo was big...

[blk_srt]

Well, this is what my buddy is or at least was going to use on his camaro untill he found a manifold setup for running twins




Here is the link for ebay
http://cgi.ebay.com/ebaymotors/ws/eB...RK%3AMESE%3AIT

[ez1286]

That's a monster!!! I think i'll buy it

[blk_srt]

I've actually never seen a turbo that big that was internally gated

[ez1286]

It would probably take two maybe three weeks to spool even on a stroker.

[Thor06]

Holy hell that is one massive fuckin turbo! What is that?

[Nayr747]

Actually if it's the same GT42R on the highest hp Evo VIII, is spools at 3,800 rpm (2.4 stroker). Wonder what it would spool at on a Camaro? I've seen that turbo on a couple DSMs too.

[blk_srt]

its a gt42r with a hot side ar of 1.01. I could actually fit my fist inside of the exhaust outlet and all 5 fingers in the compressor inlet and I have big hands. the vband of the exhaust is 4" and the vband for the air outlet is 3". Its honestly the biggest turbo that I've ever seen in real life. It has a twin scroll exhaust housing to. It dwarfs the turbos that you find on motors like the duramax and powerstroke. Oh and it weighs in at just over 40lbs. Oh and that can is a full sized spray paint can that barley covers the compressor wheel

[kjewer1]

I don't think that can spool at 3800 even on a stroker. A 35R on a stroker hits 25 psi at 37-3800. My T67, which is a little smaller, reached 29 psi at ~4800 rpm or so. With a 1.01 hotside it would probably never spool on a 2.0 or 2.4 That's a big housing, but just right for a high displacement motor.

The Internal seemed odd to me too, but when you think about it, this turbo will still run relatively low boost, since the V8s have 2-3 times the motor we do. And the 1.01 hotside will flow so damn much the exhaust manifold pressure should remain relatively low, reducing the tendency for the internal to blow open.

AMS runs these turbos, you can see them on thier site (www.amsperformance.com), and Shearer makes manifolds for them. Pretty sweet.

[blk_srt]

OK well heres an interesting question and I know we aren't V8 guys but most of us know turbos pretty well. Hes thinking about selling this turbo and running two smaller ones and he wanted to know what I thought he should run. Looking at compressor maps and such a LS1 needs ~65lbs/min of air flow to keeps its volumetric efficiency or whatever and since he will be running a 383 I figure he'll need ~80lbs/min to reach his goal of 900whp. What two turbos can accomplish this task with good spool up low price and preferably a t4 flange (he can always get an adapter plate) At first I was thinking a pair of super 60s but after looking at the maps they wont put out quite enough at 70lbs/min for the pair. Then I though a pair of 20gs would be cool but they are so damn expensive.

[kjewer1]

I don't think 80 lbs will be quite enough to do 900 whp. The problem with two turbos at this level is getting something in a T4 frame that isn't too big (~120 lbs combined). Not that being too big is a bad thing entirely, but it will unecessarily increase lag. For example, two 50 trims would flow 100 lbs/min. You would still want relatively large turbine housings, but I'm not familiar enough with T4 housings to make a recomendation. Even with half of a 383 to spool up the turbo, that's half of 6.2 liters, or 3.1 per side. 50% more displacement per turbo than we run in our DSMs. So that's much more exhaust flow to get rid of, and no need to use restrictive housings to spool it up. Not sure what turbos to use exactly, but this is the line of thinking you want to use when making the selection.

[scottsee]

Here is what a GT42-Non-R looks like on a Dsm Manny.. Minus the fact it's in a Dodge Colt.

http://thelotspot.com/images/jp/Colt06/DSC00154-1.JPG
http://thelotspot.com/images/jp/Colt06/DSC00159-1.JPG
http://thelotspot.com/images/jp/Colt06/DSC00161-1.JPG
http://thelotspot.com/images/jp/Colt06/DSC00162-1.JPG

[blk_srt]

Originally Posted by 95 GSXracer

I don't think 80 lbs will be quite enough to do 900 whp. The problem with two turbos at this level is getting something in a T4 frame that isn't too big (~120 lbs combined). Not that being too big is a bad thing entirely, but it will unecessarily increase lag. For example, two 50 trims would flow 100 lbs/min. You would still want relatively large turbine housings, but I'm not familiar enough with T4 housings to make a recomendation. Even with half of a 383 to spool up the turbo, that's half of 6.2 liters, or 3.1 per side. 50% more displacement per turbo than we run in our DSMs. So that's much more exhaust flow to get rid of, and no need to use restrictive housings to spool it up. Not sure what turbos to use exactly, but this is the line of thinking you want to use when making the selection.

That being said, do you think it would be better to run two smaller or just the one big one?

[SLoe]

I don't want to jack your thread, but I am having the same discussion with the guy that owns the pinto I posted pics of a while back. He wants to run two smaller ones, and I argued that since he has sooooo much displacement (650+ci don't recall exactly) that one would be a better set up. clicky and scroll down He wants to run two of either the pt-88 or 91 (still up in the air about his power goals). I say the pt-106 would be a simpler solution, and it would get him over the 2400 hp like he wants. I am interested to hear what you think about 2 v. 1 setup Kevin.

[kjewer1]

I'm not sure which I think is better. I think it really comes down to what your definition of "better" is, and I should also mention I have never had the pleasure of setting up a turbo on a large displacement motor. But I'll think out loud for a bit anyway.

Two turbos can make packaging easier in some cases. Running exhaust piping from two cylinder banks to one turbo can be cumbersome in cramped engine bays. It is nice to be able to use "normal" sized turbos as well, instead of some of these 40 pound monsters. If you are using divided housings however, and want to keep the cylinder pairing intact, you end up using two WGs per turbo, like the AMS kits and most other. WIth two turbos, you're running 4 wastegates. That adds a lot of plumbing and cost.

Single turbo is simpler in many ways. Fewer WGs, fewer moving parts to fail, etc. Plumbing can be more cumbersome, but many poeple pull it off just fine. There is sometimes some concern about the exhaust gasses from the further cylinder bank cooling or losing velocity before reaching the turbo, reducing efficiency, but again poeple are very successful with single turbo setup. Many cars that came from the factory with two turbos end up being converted to single turbo, and that says something.

Lag can be made similar with either setup by properly sizing the turbos. On a really huge motor I would be concered about a single turbine housings ability to exhaust all that displacement effectively. Two turbos may let you run more combined turbine housing size increasing VE. Some of those huge turbos seem like they would be up to the task though. It's not very often I even look at turbos that big... Some of the measurements are just insane It's all way beyond my personal experience level, so I can't offer any specifics, and there are no airflow values given so you have to go by advertised max power capacity. It is interesting to note that the turbos are all roughly the same price, so going single saves over 2 grand just in the turbo itself. But of course, anyone looking to make 2400 hp should have a pretty big budget or plenty of disposable income.

[SLoe]

Originally Posted by 95 GSXracer

It is interesting to note that the turbos are all roughly the same price, so going single saves over 2 grand just in the turbo itself. But of course, anyone looking to make 2400 hp should have a pretty big budget or plenty of disposable income.

Difference in price noted by me. He doesn't care. His money >my money There is 100k tied up in that car already, the intake mani alone cost more than my gst. I also thought it was odd that there were no flow maps or numbers of any kind other than horsepower (2400+ is kind of a broad range). Thanks for the input as usual.