Twins with a B-1

[Powder Extreme]

I have a B-1 with the "auto" housing, it works great but I'm looking for even less lag. Has anybody used this turbo with twins? Would it work pretty well to use an HY with a 9cm as the little turbo? Does anybody have a line on all the hardware it takes to do this? Any other ideas on how to reduce lag would be appreciated. Does propane spool the turbo quicker?



Thanks,

Jerry

 

[csutton7]

go to the 12V forum and check out the twin thread-



to my knowledge the only twin setup with the B1 is mine and it's being used as the top(primary) turbo and a super secret Performance Diesel lower turbo ... . chris

 

[Cummins Corvette]

I have been thinking the exact same thing! The hy is awesome from a lag perspective and I think this idea just might work. If I can get a hold of a used hy mebby I'll try it.

 

[TxDieselKid]

I really do not have any experince with twins other then talking to Nowel, and Eric McBride, and some others, but I would not waste my time with an HY35. If you want a turbo with little lag, then try a HX35 with a 14 housing. This is about the smallest I would go, and even then i would think you would have to have a truck that made 300-400 hp max for a turbo that small. If you want a turbo that can move some air that is that small try a Piers HX35. Or better yet, get a hybrid H2E with a 12 or 14 housing.



Andrew

 

[Cummins Corvette]

In theory you could get away with using a WAY smaller turbo as the primary in a compound setup because the primary is working with much more dense gasses. They would not need the extra room to get through. If you are feeding the primary 15 psi, then that turbo is seeing twice the density and moving twice the air at the SAME VOLUME. According to how I understand it, it could work.

 

[TxDieselKid]

In theory, if I put 15 eggs in one regular sized frying pan they will cook as well as one over a longer amount of time right? Same kinda think. I will say this, if you get the HY, then leave it waste gated at 20 psi unless you plan to monitar each turbo's boost presure. The most the HY can go and stay in it's effecy range is 32 psi. But if you can catch that insted of letting it goto the atmosphere, and send it to the next turbo, then you won't be missing much. By the time that that the smaller could reach 20psi, the bigger should be starting to spool up.



One other note, over under systems seem to be the way to go on our Dodges. Others have been tried, and this seems to be the most popular.



Andrew

 

[Jim Fulmer]

Don't forget that a turbo is stupid, it only knows what it gets in info (air in our case) it knows that it gets 14. 7 PSI at sea level,59 degrees and 29. 92 (Standard day) if you feed it 15 PSI on top of that then it just gets better from there. This is one of the three topics I'm going to discuss while on vacation, I need to know oiling, drain back and exhaust housings. I don't know what Chris is using for a wastegaste but look at Mitchell's page, there are some new pics of the blue truck under the hood and you can see that they use an external wastegate just like the gasser buds.



Jim

 

[csutton7]

I'm not using a wastegate yet--don't know if I have to---need more testing--there's a B1 wastegate on there now, but it's not hooked up and we're not sure it would work anyway, as there's no way to adjust it--we have a back up plan if we need to wastegate the system---



guys think about the systems that are out there--big turbo on the bottom and smaller on top---other systems have been tried and don't work as good---HVAC has been at this a long time and tried many combo's--I suggest if you want a system you get it from him --chris

 

[BPINE]

HVAC and I have been doing some turbo talking latley and hope to come up with a nice twin system for trailer pulling soon, we will see I know it is needed. It should also work for slightly less power as well. We had better get to work Nowel we don't want to miss the boat.

 

[TxDieselKid]

guys think about the systems that are out there--big turbo on the bottom and smaller on top---other systems have been tried and don't work as good---HVAC has been at this a long time and tried many combo's--I suggest if you want a system you get it from him --chris

Thanks for backing me up(at least i think you are). Like you say HVAC knows twin turbos, and when the time is right I should too.



Andrew

 

[Cummins Corvette]

Uh... That's what I meant guys. Big turbo feeding the smaller one. B1 with the bigger housing feeding the hy. I don't know if it would work very well, but if I get some free time and $$$ I might try it.

 

[TxDieselKid]

CC,

Let me ask you a question that might explain my point. Why do people who tow, and have a mildly BOMBed truck but a bigger housing on their HX35, be it a 14cm, 16cm and so on? If you think about it, this is the reason such a small turbo will not work on a wildly BOMBed truck.



Am I right guys?

Andrew

 

[BPINE]

It might actually have a chance TxDieselKid if it were waste gated properly, but not for top end power.

 

[Floor It]

I have a B-1 turbo and have talk to nowel about it on chris's truck,we talked about it for towing in my application and now I'm really interested in it. Chris I wish we didnt live soooo far away from each other because I'd love to ride in your truck,it sounds like it ROCKS! So I too would be interested in it Blair.

 

[Powder Extreme]

I'd definetly like to do it, if it's not a great deal of hassle. A friend just bought an 01 auto said he'd trade me turbos for my old HX. Now if I can just figure out what appears to be a plumbing nightmare, I'm in business!

 

[KWIKKURT]

My Opinion for what it's worth... Big turbo feeding the B-1 or KSB-1 with only 8-10 psi then use a external wastegate for the best boost control... ... Oh Yeah order some "Wheely Bars" and New Tires... .



I will be testing a new Variation of the B-1 and the At-4 soon



Sounds Like Chris suttons / Hvac's Twin setup is working great and there are more Singles and Twins coming soon... ... Have to stay ahead of the Copy cats!! Kurt

 

[Powder Extreme]

Can somebody who knows more than me (which shouldn't be hard) tell me why it wouldn't work to use an HY-9cm wastegated to around 8psi then feed that to the B-1 to be multiplied up to about 45-50? It seems to me that neither turbo would heat the air very much and there would be very little lag. Does the problem lie in the small exhaust housing? Would it restrict to much and shoot the egt's through the roof even with the wastegate open?



Kurt, I know you were trying to explain this to me, but with my blasted cell phone cutting out all the time, I was having trouble following you I'm going to check the wastegate tomorrow, if the bolt was loose I'll let you know. If it was loose is there some type of high temp loctite I could use?



I'm not looking for huge HP numbers, I'd be happy with 450-500 (currently at 372hp in 95 degree heat at 5,000 feet). What I really want is virtually no lag and cool egt's (don't we all )



Thanks,

Jerry

 

[Diesel Freak]

heheheheeheh... ... you guys would crap your pants if you saw the little goodie sitting on my dining room table at the moment..... the only problem with it is it spools too fast, and I need a slightly larger exhaust housing... ... . and at a high idle of 2500 RPM... . this is with no load, it makes 8 psi of boost.



Twins are cool..... if the primary turbo has a 3:1 absolute pressure ratio, and you feed it 10 psig of boost... ... what is your total boost?



drum roll please





60 psig... ... ... ... if I am wrong, would someone correct me.

 

[HVAC]

No Comment

Without commenting on what DF said, the builder of the B1 turbo told me that if we fed it with 10 psi in a twin sysem we would have near 100 psi. Well he wasn't lying, we are at 80 psi so far. Testing continues.



Tonight I was watching a certain top secret twin turbo truck pilot making his way through the gears on his auto transmission, and with no effort he was showing 23 psi boost on the digital gauges! There are umpteen zillion stock rigs that will never even see 23 psi by comparison.

 

[Diesel Freak]

why no comment... ... I left my post open for them





if my math is wrong... ... . please correct me







on a side note what is involved in 'o' ringing a head?