ReMiX Getting Even Bigger!!!

[JJ]

From what I can see is it only the compressor is bigger the rest is the same it only the inlet and outlet of the compressor is bigger by 1/4" thats it I got all the pipe work I need to plumb in so that is not a problem, Weather I fit it and It dont work out as good then it on to the next step. The exhaust side of things is the same. I will measure the items later ......JJ

[steve mmmph]

so come on then, did the new turbo work, i hope to god it has, and as for a dump valve, can it be fitted without a bigger turbo, can you even get a dump valve, ok hold my hands up , not to sure what it all means but i want a big chugging lucida that makes peoples windows rattle as i pass, i am 37 and My wife thinks it is the mid life crisis, as long as it is a car and not another woman she said she will put up with it..

[Kirsten]

Originally Posted by steve mmmph

so come on then, did the new turbo work, i hope to god it has, and as for a dump valve, can it be fitted without a bigger turbo, can you even get a dump valve, ok hold my hands up , not to sure what it all means but i want a big chugging lucida that makes peoples windows rattle as i pass, i am 37 and My wife thinks it is the mid life crisis, as long as it is a car and not another woman she said she will put up withit..

I can totally relate to that

[Chris Howarth]

Originally Posted by Kirsten

I can totally relate to that

try having 3 cars and caravan that you obsessed with

there are "golf" widows and "computer" windows..................new one is "garage at the bottom of the garden" widow

[JJ]

Originally Posted by steve mmmph

so come on then, did the new turbo work, i hope to god it has, and as for a dump valve, can it be fitted without a bigger turbo, can you even get a dump valve, ok hold my hands up , not to sure what it all means but i want a big chugging lucida that makes peoples windows rattle as i pass, i am 37 and My wife thinks it is the mid life crisis, as long as it is a car and not another woman she said she will put up with it..

I let you know when the engine has been rebuilt

[steve watts]

JJ, wont having a bigger turbo on the bus cause more heat as the engine will go faster, thus more heat could cause head to go again. you no me im no mechanic. There's a post on here saying that a lot of the heat that cracks these heads is from the Turbo being to close, Am i talking rubish cause my head is now spinning.

[JJ]

Originally Posted by steve watts

JJ, wont having a bigger turbo on the bus cause more heat as the engine will go faster, thus more heat could cause head to go again. you no me im no mechanic. There's a post on here saying that a lot of the heat that cracks these heads is from the Turbo being to close, Am i talking rubish cause my head is now spinning.

It hard to prove that it is the heat that cause's the head to crack, Even thought there proof to it in some cases. but I'm running more air and colder so it will keep the head colder. Hope this will clear it up abit ......JJ

[ex-ctr]

i torqued up my head then did the 1/4 turn thing [might have been 1/2 turn, i cannot remember but i did it to the book] then using using my digital torque wrench decided to see at what load the bolts would turn and found four or more had gone plastic and thats using new bolts, its a really bad design using stretch bolts, much better if you could get ARP studs and nuts and just torque them down, i think uneven loading causes the head to crack aided by over heating

[ClintJ]

Originally Posted by steve watts

JJ, wont having a bigger turbo on the bus cause more heat as the engine will go faster, thus more heat could cause head to go again. you no me im no mechanic. There's a post on here saying that a lot of the heat that cracks these heads is from the Turbo being to close, Am i talking rubish cause my head is now spinning.

Wont having a smaller turbine wheel and turbine housing that creates more exhaust back pressure (reversion) on the engine create more heat in the exhaust ports and head?
Bigger the turbine wheel and housing means more lag but with more flow which creates less back pressure/reversion into the engine which the heat has less time to hang around in the exhaust ports manifold and turbo meaning less heat.
Also a larger compressor matched to this engine will be more efficient than that really small CT9.
My skyline turbo is around 1&1/2 times bigger in the exhaust wheel and AR area ratio of the CT9. Sma egoes for the compressor side.
Standard boost on the CT9 is 7-9psi. Im running 14psi with tuning pod for the ecu to up the fuel. Even on my max setting of 9 on the tuning pod and 14psi, my exhaust gas temp only reaches 450degC. Thats about 150degC cooler than the recomended max exhaust gas temp of 600deg pre turbine.
With JJ`s setup and his larger turbo, not much should change in his EGT( exhaust gaqs temps) they will drop a little bit but will not go any higher unless he manages to up the fuel from using a tuning pod. In fact if he ups the boost his EGT temps will drop and there is less likelyness that there will ever be a head problem from cooler combustion temps...
Higher Boost pressure will dilute the air fuel ratio making the engine run leaner. Lean diesels are cold. Thats why if you left your engine to idle up from a cold start that it might take 20 or 30mins to reach running temp becuase the they are so lean...
Anyhow I think Ive said enough and I hope that it explains it a bit better.

ClintJ

[ClintJ]

Originally Posted by JJ

From what I can see is it only the compressor is bigger the rest is the same it only the inlet and outlet of the compressor is bigger by 1/4" thats it I got all the pipe work I need to plumb in so that is not a problem, Weather I fit it and It dont work out as good then it on to the next step. The exhaust side of things is the same. I will measure the items later ......JJ

This turbo might originate from the upright 3CTE found in the later models and I think the corona??? My mate Mohommad told me that his turbo on the corona 3CTE looked bigger. Especially the compressor housing.
Like I said, if you took some measurements then we would know if it was of any benifit.

Clint