3B compound turbo, 25psi boost!?!

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Yes the compound system is far better than running two parrallel turbos. Parrallel turbos are no use on a diesel unless it's a V block and you run one on each bank.

What engine/turbo/fuel combination delivers 25psi?

I have a 3b running 30psi on a single ct12b 10 psi at 1200 rpm 30 at 2500. I run a kzn130 surf after market alloy radiator used what i had sitting around. Had it for years never had a problem
 
There are no maps available so is a big guess on that one Tap.

This is true, but comparing it to some know maps of similar size suggests it'll be fine to a PR of 3. How close that gets to 30psi depends on your intake restriction. Efficiency may however be not good and drive pressure may be very high.

The stock 3B pump is only good for ~400Nm worth of fuel and you're better to use an intercooler and lower boost. Shedding ~50% of the intake heat will give you the same air but more power (lower drive pressure) at 22psi.
 
I reckon that intercooler is too small for the effort involved in fitting one. A diesel doesn't have much need for a blow off either.
 
That's right, they do with a manual transmission don't they. Would there be need for one if only running moderate boost?
 
3Bs and 2Hs use the throttle plate to develop a pressure differential to give the fuel pump a signal to increase or decrease fuel. It is a Vacume throttle position sensor if you will. I personally don't run a blow off valve and never have, but it's more about how you drive vs total boost. Fast shifting where you are boosting hard then take your foot off the gas pedal abruptly causes surge waves back towards the turbo. I guess you could do it without shifting and just let off the throttle abruptly after accelerating hard. I dont drive that way personally, but if you do it's a good idea to consider one. A clear indicator is to watch your boost gauge and accelerate and let off the throttle and you can see an immediate boost spike. It can go up several lbs. It's not like it will destroy your compressor imediately, but it will fatigue it faster. That being said I know of only one fella who runs one and who ever hears about 3Bs or 2Hs destroying compressors from lack of blow off valves. I think its probably the least of their worriers. It's more semantics I guess.
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I have a 3b running 30psi on a single ct12b 10 psi at 1200 rpm 30 at 2500. I run a kzn130 surf after market alloy radiator used what i had sitting around. Had it for years never had a problem

Wow you must have 2 threads left holding your fuel screw in.
 
I had a BOV on Tencha .. and to be honest it's more a fancy complicated ( another ) item to take care of .. my boost spike on hard shift WOT can go up to 4 - 5 PSI but that's happening once every month .?

It might sounds cool .. yes for sure .. but not sure if you really needed. In fact I remove mine ..
 
my BOV setup . .

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Wow thats a tight fit Tapage. Are you guys going out for any fun between jan 15th and march 10th? I will be in panama @ santiago, playa reina.
 
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