Ocmechanx

do the exhaust housings actualy make that much or a differecnce on a stock or hybrid hx35?

justinp20012500

Overall temps, not really.

How fast the temps climb, most definitely.

I would run a "modified" 14 cm waste gated exhaust housing.



Justin

apwatson50

What kind of difference are you looking for?
There is a difference in spoolup, if you are pushing a lot of fuel there will be a big difference in top end EGT's between the 12 and 16. The 14 will perform like a 16 on the top end but have the spoolup of the 12, if you get the 14w/g.

Ocmechanx

tryin to get my temps under control, hits 1400 way to fast goin through the gears, also wonderin if the housings noticably helped the top end, boost also hittin 47-53 dependin on grade and load.
thanks

Ocmechanx

Also 14 wg vs 14 nonwg as far as temps and spoolup

apwatson50

you have a 12cm now I take it? you definately don't want a 14nonwg. From what I understand a 14wg will actually flow a little more on the top end than a 16. the 16 will definately cool you down some, I couldn't even guess how much but it almost sounds like you need more air/ bigger turbo all together.

justinp20012500

47-53 ???

Thats way too much. Your little HX35 (I am assuming you still have the stocker) is just creating hot air after 40 psi.

Are you sure you are really hitting that high of boost? Do you still have the stock head gasket? One could only imagine that your drive pressure has to 75psi at 53psi of boost.


The 14 w/g will out flow the 14 non. I would stay away from anything that is non wastegated, but then again if you are really hitting 50+psi you should look into getting a 18 cm housing. Or maybe even something like the 21.5 cm housing...

justinp20012500

On second thought...

Is your pyro post or pre???

apwatson50

I sure hope its pre cause if its post then his pre temps at 50psi of boost would be greater than 2000deg!!

I also agree that a 18cm would probably be a better route to go.

HOHN

47-53? ON a 35/40????

Brother, do you have a death wish for your turbo or engine?

Ocmechanx

Yeah I know its insane, but my pyro is pre turbo and I have been watchin my temps for engines sake, but the 35/40 is homeade off 8.3 cummins it is 12cm wastegated plugged off of cource(I know bad Idea) mainly tryin to get drive presures and temps a little easyer to control. I can do it now but it takes littl etoo much effort and the (little 35) won't take much more, although I am proud of it as much he11 as its seen, 47psi everyday all the time for prob a year or more

Ocmechanx

Oh yea unless my gauge is wrong it is hittin 50+lbs in a hard pull, boost is being taken from where the wastegate was hooked to instead of the intake, did forget to mention that while acceleratin up a hill w/trailer in 4th had to slow down, instead of gearin down just took back off at bout 1100rpms,...1400rpms and round 50lbs inputshaft shattered, still recoupin from that figured I'd tackle this prob while truck is down.

apwatson50

Your not making much more power running at 50psi than you would at say 40psi with that turbo as at a certain point it just heats the air to create the extra pressure instead of efficiently compressing the air, then you went and blocked off the wastegate which is increasing your drive pressures alot more than your compressor side this is way overspeeding your turbo. I would bet if you hooked your wastegate up and set it to open at 35psi you would still see 40+psi but without the excessive egts.

If you are out of the efficiency map of the turbo it really doesn't matter if you are making it produce 40 or 50psi its not going to actually push any more volume of air into the engine.

But you still should at the very least put a 16cm housing on or even an 18 with your fueling level.

Ocmechanx

Well, how much more lag are we talkin bout with a 16, I can hit 45 lbs at 12 13ish now. If it lagged out to 17 18 before spoolin up my temps would be through the roof, but I never ran a larger exhst housin so fill me in fellas lol


And yes I know I do need a diff turbo altogether but I stay broke, kinda like sheril crow said (Its not havin what you want, It's wantin what ya got) lol

Thanks

Ocmechanx

smoked many bicycles..............

thats funny don't care who ya are

or maybe not so much if ya ride a bike

lmao