I have been given a Escort Cossie Large turbo, will tihs fit my saph 4x4 ?

 

Jep - its a T34 and it will fit without problems. With stage 3/330+bhp you should get 360 bearings.

Thomas Krath

 

do you have a t-34 stage 3 chip then.....you need it with the t34

 

thats not correct.

the chip has nothing to do with the turbo.
if you have a big or a small blower the only thing different will be back pressure, boost temp and lag.
the only air information the chip gets is boost pressure, given by the MAP sensor and the air temprature.

a drop in boost temp caused by the increased A/R og the bigger turbo might cause your car to lean out at high rpm/boost if you already are on the limit of your injectors...

 

THE AIRFLOW at engine speeds with a t34 vs t3 is vastly different so needs a different chip as it is lean all over the boost range even on spool up its leaner it is due to the ve of the engine and turbo that the chip needs changing

 

I have a Stage 3 set up.

Greens, 3bar, ect....

The chip i have has fueling for 27psi, i was told the chip i have will work find on the T34... I assume the chip was made for a T34, maybe why i have so much over fuel, (big flames from teh rear)

Is that right, If i give it full boost and lift off it will flame out the rear, (big flames)
could that be the T34 chip adding fuel for a T34 when i have been running a T3 ?

 

you forget one thing like RsGus said......AIRFLOW........the computer doesnt messure it...but its very different....

 

I said the backpressure will be reduced, and that will cause an increased flow through the engine, but otherwise there is no difference. yes, the t-34 will chunk more air at a lower rpm (rpm for the turbo) than the t-3, but the engine won't know that.
once the air leaves the turbo, it passes through the same air hoses, intercooler, inlet manifoil and all that. the head don't change flow capacity because whatever gives it air is changed.

lower charge temp and lower backpressure can/will increase the air mass in the mixture, but the chip is not set up for a specific turbo. its set up for a specific injector, map sensor and a the fuelmap needs to be correct according to how much the head flows. ie. if you get a full port polish job, modified inlet and a new header the flow capcity of the head will be very increased and will require a new chip - but this again - has NOTHING to do with the turbo but the flow capacity of the head.

if you doubt this - you need to go talk to someone who does this for a living. I did

 

dont you understand a t-34 will flow more air then a t-3......or is it that difficult....

why do you think a t-34 give more bhp at 6000 then the t-3 does at the same boost pressure and with the same spec......because there is more air....

whats the point then to go to a t-34 from a t-3 with the same spec then...

and if you dont believe me...then ask Stu.......and the rest of the known guys...

 

air flow is determined by inlet manifoil pressure not by the size of the compressor that builds the pressure.

15psi boost is still 15 psi boost nomatter if your turbo is big or small or if you got a supercharger for that matter. 15 psi withing the plenum chamber will still be 15 psi.
is that so hard to understand?
the flow 15psi gives will still depend on plenum size and the flow capacity of the head.
at high rpm a bigger turbine-housing (or a turbine with cutback blades for that matter) will flow better than a small one.

if your turbo con't cope with the airflow needed at high rpm the boost will drop and you need a bigger compressor to maintain the boost. a smaller turbo (t-3) can't cope with a full stage 3 setup because it can't give enough air at high rpm to maintain the boost. thats the reason why a t-34 is part of a stage-3 setup.

running with a t-3 on stage 3 is fully possible, but the lifetime of the turbo will be drasticly reduced when you start pussing 20-25psi+ boost due to the extreme rpm the turbo will get.

 

so you say there is no difference between a t-4 at 1.5bar boost and a t-3 at 1.5bar boost for example....the air volume is the same?.....well.....i can say you one thing...with a t-3 chip....if you put the t-4 on...it will run lean as hell

air volume has nothing to do with pressure......these are two different things....

 

inside the turbo the air mass will be greater in a T-4 than a T-3 at the same air pressure.
What I'm trying to tell you here is that inside the plenum chamber the air mass/volum will be the same nomatter what pushes the air in at the same pressure.
the volum in the plenum won't be bigger because you change turbo.

a T-4 on 1 bar boost gives a lot more air than a T-3 on 1 bar, but when you pass this air into a intercooler and throttlebody with smaller inside diameter two things can happen. if the head flow capacity is good enough - the air velocity will increase.
if the flow capacity is already on the limit - boost will rise.
simple as that.
this is the reason why boost drops on high rpm with a full stage 3 setup and a T-3. the turbo can't deliver enough air to maintain boost pressure.

 

air volume is directly dependent of pressure.
increase pressure and the volume drops. the mass on the other hand stays the same.
this is what gives turbocharged cars more air at more pressure. the mass increases at the same volum.

 

God... Can it really be that hard to accept...? With the same rpm, same backpreassure and the same temperature, the flow and power is determined by the inlet manifold preassure. With the same rpm, same backpreassure and the same temperature, what in the world makes anybody belive the diameter of the compressor makes any difference??
Think it over, if you charge two identical engines with the same preassure at the same temperature. One got a T3 compressor, the other one got a 1meter aircraft-compressor... (that's what RSCosworth works with daily, I'm a mechanic, currently working with Audi's) Does anyone really belive those two engines will perform differently after spin-up??

 

ok...so you say.....i buy a t-3 chip for stage 3......and it doesnt matter what kind of turbocharger i put on......?

thats what you guys are saying....

i say you have to change the program because of a different turbo

https://passionford.com/forum/viewto...030&highlight=

read this topic till you find Stu's comment...maybe this clear it out...

 

what you're all not really explaining is that the t34 has a larger exhaust housing than the t3 (std vs. std). that means that the 'back pressure' is reduced compared to a t3, so the volumetric efficiency of the engine is raised and it processes more air. therefore for a given boost pressure, an engine with a higher ve will consume more air.

imagine it like this:

if you blow through a small drinking straw with a certain pressure, you get less air mass flow than if you blow through a drain pipe with the same pressure.

the t3 exhaust housing makes the engine a drinking straw, the t34 is a drainpipe.

 

noone is forgetting anything here

 

Backpreassure is worth thinking about. (not the diameter of the compressor) All standard chips for different stages covers a wide range of modifications. The only two things you got to have exactly right is the MAP-sensor and the injectors. (of course a stock and a max flowed head with uprated manifolds and cams need different programs) The point is that all the small parameters (like going for a little bit bigger turbine) can be adjusted for by adjusting the fuelpreassure. If your engine is running ok but you fit a bigger turbo and maybe a bigger exhaust, you should increas your fuelpreassure just a bit to be sure. An air/fuel meter does not cost much , and will tell you if you're running lean. Mine is working just fine...

 

ok....i put a gt42 on my cossie instead a t-3, with greens, 3bar map, stage 2 chip....and 1.5bar.....and i doesnt have to change the software because of the bigger turbo...

if the computer doesnt put more fuel in because of a bigger turbo....what the fook has the fuelpressure got to do with it...if the injector doesnt open...there will be no flow at all...

https://passionford.com/forum/viewto...030&highlight=

read this will ya.......

 

If you reduce the backpreassure, you increase the flow. More fuel is needed, but not much. If you increase the fuelpreassure, you increase the fuel-flow. This means that you get more fuel with the same opening time your injectors have.
If you have trouble understanding this, think this over: How many modifications can I possible do to my engine? How many different chips does Ahmed Bajoo supply?

 

i guess this would be an endless discussion......

 

would you get a remap when changing the stock exhaust for a mongoose 3"?

it certainly drops backpressure a lot, and according to you such a change needs a different chip...

 

NOW LETS SEE

1 FOR T3

AND A TOTALLY DIFFERENT 1 FOR A T34

Now is he wrong i'll bell him and tell him he don't know shit PMSL

and on a 803 injector you'll not find a car mapped by him with more than 23psi held !!

You may have learnt to pulg a chip in lads but theres a hell of a lot more to it than that

 

The above info is wrong sorry
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3 off the shelf for a T34 depenping on what exhaust housing is use

and from what your saying live mapping would be a complete waste of time

 

Pass the popcorn