Sounds like my kind of truck! Can you get some pictures of those bad boys?

 

well i have some pictures but i don't have a working system to use for posting them.the computer i normally use is a custom job with 4 terabytes and duel pent 4's.it has the scanner and everything else for doing the job,only it has a virus or two running around in it.if it gets fixed i'll work on posting something.anyways one of the trucks just blew an engine and the trucks getting sold.so much for that one.i got a monster of a truck to work on.the 636 needs an overhaul.catch you guys a little later.

 

ok,bad news.the trucks are getting sold in favor of some international trucks with the 466's.the trucks i've been working on are no longer up to handling the work they were originally bought for.i'll keep you guys updated on what happens.

 

One huge AZZ turbo would be better suited in my opinion. Boost is boost and one larger turbo could run alot of it and keep egts low. Only thing youd have to worry about maybe is lag. I use to have a supra that had a stock sequential setup and alot of guys upgraded to bigger twins but in the end the single guys seemed to get just as much power with alot less money.

 

I can see twins because hot exhaust could be routed from each side exhaust manifold, but tripples? Seems like once the exhaust has gone through the first turbocharger (expanded & cooled) that it wouldn't do much for the next one.

 

I remember reading a post by dzljim over on the deisel stop about how he was getting better results with just two, his findings were exactly what you are stating here. Not enough hot exhaust energy left for the third turbo.

 

I've been reading up on twins and this interesting site came up: http://www.p4powersystems.com/ These are the first complete kits for the 7.3's I've seen. Unfortunately, there isn't a very good description nor good pictures. I've emailed the company about both and haven't received an answer yet. What are your guys' take on twins? One big one better? It seems like the boost numbers are much higher with twins. Do you think that you could run twin "stock" turbos?

 

properly tuned twins are way better than one big one. With a good set of twins both turbos are running in thier effeciency range, which results in lots of cool air even though boost pressure is usually much higher than a big single, also turbo lag with twins is less than a big single. FWIW im going to start collecting all the "supplies" to twin my beast. I am planning on using a huge turbo (unsure which one at this pt) to feed my existing h2e, ported heads, high strength valve springs and pushrods, reduced comp pistons and possibly billet connecting rods if i happen to strike it rich. Doubt this happens at a very fast pace because i will be doing project as the money rolls in, hopefully within 6 months i will be blessed with twins!


Luke

 

Would REAL twin turbos work like with two stock 7.3 turbos??? Sounds like your talking about doing a sequential turbo setup because twins actually means two identical turbos. I know twins sounds 100x better though. Sounds like a pretty mean setup your going to do. Is the HX50 bigger than the h2e?

 

i believe the hx50 is slightly larger than h2e, its not near big enough to feed the h2 in a twins setup. I am going to try and find a holset ht4b or a schwitzer s400. To give you all an idea how big these are an h2e flows approx 1000 and ht4b flows 1800 cfm range. And yes im talking about sequential or staged turbos, not 1 turbo per bank. Dunno exactly what im gonna use yet but it should be a pretty mean, hoping i can have smoke free setup with my existing injectors. Right now the h2e wont even come close to clearing up the smoke.


Luke

 

Any thoughts on why the sequential is better than one per bank other than the ability to have more boost pressure? I always thought that more volume at less pressure was more desirable than higher pressure.
I've always thought that two smaller ones on each side would be better than one big one. But never entertained the thought that sequential would be better until I started reading here on FTE.
I'm always ready to learn something new.
Another FTE first.

 

Yeah man that would be optimal . I think that air flow is underrated in diesels. Sure diesels make power by squirting lots of fuel into the engine but air/fuel ratio is important too. I see all these trucks shooting black smoke everywhere when they can be converting that to more power. IMO, twin turbo is the way to go in trying to clear ALL or MOST of that smoke up. Please keep up updated on what your going to do.