Max boost for internalls on stock engine with ct9b?

[ep82_advance]

it would be greatfull if some one could help me out here...

i would like to know if it would be safe to run around 1.1-1.2 bar on a ct9b with stock internalls..

my mods follow:

hdi frount mount intercooler

straight through exhaust system

hks actuator and meshed the turbo

trd ht leads

freshly service

new head with all new internalls & skimmed...

thats all the mods i have

would it be safe on stock internals to run around those boost levels?

Thanks in advance and Merry Christmas to all

 

[Sean Kinsella]

nope wudn go that high mate..
usually 1 bar is the highest most people wil go and a ct9 will not last long above 1 bar unless it is a hybrid

the 4efte engine can usually handle 1bar on TD04 for a long time if driven right and not abused and looked after..frequent oil chnages etc...

 

[Rev]

Are you at stock compression with a skimmed head?

 

[Sheldon]

youn will not get the same replys mate. 1 bar is safe.. 1.1 and 1.2 bar have been ran on a ct9 with no problems

 

[sanchez]

Get an uprated head gasket, either a 1.2 or 1.4 athena gasket, 1.2 bar of boost will be fine on the the athena 1.2 gasket from what i have learnt recently.
The stock oem gasket has some restrictions through the water ways... so the uprated one will eliminate that.
Been told by a few members on here who are running 1.2 bar daily on standard engines.
But as said would at least get a hybrid ct9 or a td04 setup as the standard ct9 will be out of it efficiency zone.

 

[mickyboy]

As sheldon has said you will get diffrent replys...If you are running a CT9 1bar is within its efficiency range anymore then that and the turbo its past its a efficiency and no doute lose power (more heat)...Theres a guy round never me and he has the same set up as me, both running blitz ECU ect but he's turned his boost upto 1.2bar on a stock ct9 and i pull away from him at the top end and all i can put it do to is his turbo has gone passed its efficiency range and makeing more heat then me there for loseing power....Hope that helps.

 

[Tim@TBDevelopments]

i'm the same running a k1 at the moment.

fueling was maxing out at 92% dutes making 175bhp which seemed a bit low. going to uprate that a little bit but want to know how far i can push this safely as its a daily driver

Tim

 

[JasonGlanza]

many factors determine the results as others said so cant be quite sure but 1 bar is likely to be maximum boost with safety in mind

 

[mickyboy]

i'm the same running a k1 at the moment.

fueling was maxing out at 92% dutes making 175bhp which seemed a bit low. going to uprate that a little bit but want to know how far i can push this safely as its a daily driver

Tim

Are you useing a fuel pressure regulator Tim? i know when i was running 1bar on a stock CT9 useing the Apexi power fc i had to use a fpr but when i was running the Blitz ECU i didnt.. im not sure why???..Maybe that could have something todo with the 90% dutes????..Im not that clued up with that sort of thing so if i sound a little dum dont shoot me down for it haha.

 

[Tim@TBDevelopments]

fueling is all standard at the moment apart from a walbro fuel pump. i have a decent aeromotive regulator i'm going to fit in the new year to adjust the base line fuel pressure which will help a little and replace the filter. but thought while i'm at it i'd stick some slightly bigger injectors in as i profer to run a lower duty on them.

maybe its because you were actually going as high with the blitz ecu and you just didn't know it as the power fc will tell you when you max them out, where the blitz will just lean out and do bugger all about it lol

Tim

 

[simonleeds]

hey micky what setup you running with the k1 just about to fit mine any advice on cam sizes it'll be on a jam ecu for now...any help would be great thanks

ps i ran 1.2 bar on a ct9 for 2 years with front mount and fcd was a few years back now tho when using fcd's and rrfpr was the norm

 

[Sheldon]

fueling is all standard at the moment apart from a walbro fuel pump. i have a decent aeromotive regulator i'm going to fit in the new year to adjust the base line fuel pressure which will help a little and replace the filter. but thought while i'm at it i'd stick some slightly bigger injectors in as i profer to run a lower duty on them.

maybe its because you were actually going as high with the blitz ecu and you just didn't know it as the power fc will tell you when you max them out, where the blitz will just lean out and do bugger all about it lol

Tim

with more fuel pressure on the rail, you can lower your duty cycle

 

[Tim@TBDevelopments]

yes of course but raising the static rate doesn't usually give a huge amount more. small increase yes but nothing major. i'm going to raise the pressure anyway to static 3.5bar pressure. this means i'm under the majic 70psi pressure for injectors at full boost.

but think i'm just going to stick some bigger injectors in there to be safe. rather have duties at a nice 70% over 90%. the injectors are more predicable at that

Tim