Who makes the latest greatest twins and injectors?

[AFarmer]

If you are wanting the best of both worlds... . check out my signature and make the call. You won't be disappointed - I'll personally guarantee it.

 

[Diesel Freak]

That's Exactly what I don't won't is a laggy truck, I 'm trying to get great street performance with high HP and to be able to tow a 5000 pound boat from time to time.

I want all that, and to be able to tow a Massey Ferguson 360 4x4 Front end loader and emplement!!!



gross is ~ 19,400

 

[tplewis]

i've just completed a holset vgt on top of an ht3b ht60 hybrid all i can say it spools very quickly ... how about 10 pounds of boost snapping the trottle in neutral

 

[Mark_Kendrick]

That's Exactly what I don't won't is a laggy truck, I 'm trying to get great street performance with high HP and to be able to tow a 5000 pound boat from time to time.

DF said it very well, you have to pick the HP range.



The basic HX35/40 hybrid-HT3B setup is great for towing and racing up to 650 rwhp. It will give superb spool-up and allow 450-500 continuous hp (towing). I have a customer that has been reliably running low 12's at the strip and ~645hp at the dyno for 3years ('00 QC 4x4 auto).



If you are going to get into the HP race then a B2 is a better primary turbo for a high hp daily driver. A dyno queen will prefer a BB or similarly sized primary.



The secondary (little turbo) will determine the driveability along with your wastegate. I've built over 15 different combinations of turbos and they all had different ideal applications.



I don't care who's turbos you buy, if you're going to drop $3-6k bug the hell out of them before you buy so there are no suprises after the sale.



I'd be glad to answer any questions you have. 817 343 8666.





here are some examples:

www.kendrickdiesel.com

http://www.kendrickdiesel.com/mervstubes/

http://www.kendrickdiesel.com/b1-b2/

http://www.kendrickdiesel.com/twinspics/B1_bigbrother/

http://www.kendrickdiesel.com/04twinspics/

http://www.kendrickdiesel.com/JCL/

some without an external gate... not my favorite http://www.kendrickdiesel.com/Joes_twins/



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[Diesel Freak]

A S400 (B2) and a box stock 3B are practicly identical at 65% with respect to max air flow 1236CFM and 1230CFM respectively.



The issue is how hard you can lean on the S440 vs. the 3B before they will surge.

 

[AK RAM]

So if you can put a simple number to it, on average, at what boost level would be considered 65% for a 3B or S400 on our rigs? Since the most we generally see out of them in a twins set is about 30 lbs of boost, can our rigs spool one hard enough to get 65% of its capacity out of it?

 

[Idaho CTD]

So if you can put a simple number to it, on average, at what boost level would be considered 65% for a 3B or S400 on our rigs? Since the most we generally see out of them in a twins set is about 30 lbs of boost, can our rigs spool one hard enough to get 65% of its capacity out of it?

It's not 65% capacity it's 65% efficiency. That means keeping the turbo on it's map. With my current set up I see 36-37psi out of my B2 and 67psi overall. If I lighten my wastegate I can get 50psi out of the B2 but it's off the map at that point.





For the fuel limited trucks (24v/3rd gen) there are better turbos then a BB for a primary as a dyno queen. They just cost more. For low cost we are stuck with off the shelf large displacement diesel turbos but as you go bigger with them the cost goes up as well. Just like Cliff (DieselFreak) is doing with the smaller turbo set up where his primary cost as much as a secondary, or about 50-60% more, I'm going to do with a larger set up. He wants lightning fast spool up and decent hp. I want big power and decent spool up (ie. better then a BB primary and hopefully close to a B2).

 

[csutton7]

Nathan--schucks I thought I had an idea of what you were going to use now I'm baffled--if you want to email me that would be ok--I won't say anything---I'm still waiting for my steroid to arrive... . chris

 

[BCarmicle]

What causes twins, or the primary turbo, to surge?



I've been messing with my wastegate settings and fueling lately and at light, steady throttle boost will surge back and forth from 20psi to 40psi. It's not driveable with light foot due to the surging.



Is the surging a turbo issue or a fueling issue or both?



Brandon

 

[Diesel Freak]

What causes twins, or the primary turbo, to surge?



I've been messing with my wastegate settings and fueling lately and at light, steady throttle boost will surge back and forth from 20psi to 40psi. It's not driveable with light foot due to the surging.



Is the surging a turbo issue or a fueling issue or both?



Brandon

wow!!!



what turbos are you running, and how are your wastgates set up?

 

[Diesel Freak]

Nathan, the Primary showed up today!!!!!



Man is this thing nice!!! Spins way easier than a S400 should ever dream of, and noticeably lighter too!!!

 

[Idaho CTD]

I take it you got the deal you were looking for from the source I sent you to?



Brandon,



I doubt it's surge in your case. I've done it before with twin but only with a large compressor wheel in the top turbo. With the DD turbo you have I doubt you could ever do it. It almost sounds like a leak of some kind but that's just a guess. Can you still hit the same boost as before?

 

[BCarmicle]

Nathan,



I can still make the same peak boost as before. I've noticed though when I floor it the truck pulls good to peak boost and activates the BOVs, set @ 65psi, then boost falls off and settles to around 50psi. But the strange thing is that it pulls harder after it has hit the BOVs and boost is falling. Could the BOVs be causing some kind of restriction?



I was leaning more towards my issue being from fueling. It only happens when i turn the TST on higher levels. Feels like it's shooting fuel in real fast and then backing off and then repeating. When I hold it to the floor at these settings it just fuels hard but gets HOT.

 

[Idaho CTD]

The highest settings on the TST will make a ton of heat and lower hp. It could possibly be your fuel pressure relief valve on the rail but it could also be a sticky BOV. BTW I use to make the most power with the TST on 5-4.

 

[BCarmicle]

Use to? Did you get a modded CP-3?

 

[Hohn]

What causes twins, or the primary turbo, to surge?

I've been messing with my wastegate settings and fueling lately and at light, steady throttle boost will surge back and forth from 20psi to 40psi. It's not driveable with light foot due to the surging.

Is the surging a turbo issue or a fueling issue or both?

Brandon

Your primary is simply making more air than the secondary can swallow. There are a couple remedies:

1) Larger turbine housing on primary (slows compressor down, and brings in boost later, after secondary is spooled more and can swallow more air)
2) Lower trim on the primary compressor. Thus, primary will "bite" less air for each revolution, and deliver less air to the secondary.

Conversely:

3) Larger compressor on small turbo (more specifically, inducer size should be bigger). This will let it "swallow" more air with each revolution and reduce the surging from the primary
4) smaller turbine housing on the small charger to get increase average shaft speed and therefore the amount of air it can swallow from the big charger.


Of course, all this assumes that the surging is the primary, not the secondary. You should be able to tell quite easily by the sound.



You should also be able to tell if the surging is turbo related, or if it's the fueling program responding to fluctuating boost. In either case, it seems your 'chargers are the root problem. --JH

 

[Idaho CTD]

Brandon,



I changed twins and haven't dynoed yet. I'm actually changing again shortly in addition to some serious fueling mods.





Hohn,



He has a external wastegate and hasn't had this problem until recently so unless his wastegate is set to open way too early then I doubt it's surging. If it's set to open too early his egt's will also sky rocket and then flat line when he get's enough exhaust flow to raise the boost on the secondary.

 

[BCarmicle]

Thanks Nathan and Hohn,



I honestly don't want to change my secondary because the twins spool good right now. A bigger secondary will of course slow down that spool up a little but as stated give more air flow.



This symptom is must more be pronounced when the truck is cold and the fuel is turned up(anything higher than 3/2). I either have to be cautiously light-footed or turn the fuel down to stop the twins, or primary, from taking off.



One helpful item would be to get a boost gauge reading only boost from the primary to find out what it's doing. That along with a gauge to read backpressure is on the list.

 

[Devildog]

IMO, there is no real magic combo. Pick a continuous power level, and tune for it.



Well here's my intention; As you can see from my profile I'm half way there. My next venture is of corse compound turbos and F7 injectors. I spoke to Poole and he was mentioning F1 springs for more valve closing pressure, I'm not sure what good that will do since combustion chamber pressure will surely keep them closed tightly, and more RPM I'm not sure about that either... . I know two things I want to use my KSB-1 and I want F7 injectors, since I have a DD cam in it now. I guess I want to tune for what ever power level compound turbos, F7 injectors, DD Cam shaft, and the DD ultimate fuel module (non defuel) on level 5x5 will produce.

I still need to talk to a few more suppliers, I would like to get my head O ringed and ported and polished and of corse new studs.

 

[Devildog]

Oh, and of corse at a fair price... ...