Outer Limits 4x4 Board

Got my car back from the dyno 78 bhp 20 psi @ 3800 rpm
turbo is way out of its efficiency range only picked up 8 bhp with 5 psi increase. Spewin

Anyone upgraded there turbo to sumthin beta? i could do with sum ideas of what i should slap on.........

Disco Potato



http://www.horsepowerinabox.com/hpiab2/prod176.htm

But in all honesty, I have no idea about the A/R and stuff... and what revs it would be usable at mate... I would love to upgrade mine a little down the track.

So the air is just getting too hot at higher boost? Therefore creating less power?

The compressor wheel and the physical size of the turbo just cant compress enough air at high rpm (well 3800) to feed the motor.
Every increase in psi should yeild a gain in bhp (10 bhp for every 1 psi in a petrol motor) as soon as it doesnt your out of airflow.

i wouldnt mind trying a turbo from a new terracan. ive driven one and they seem to have a lot of balls for a simular sized motor.
dont know if its the newer tech injection or what tho?

I'd say the Electronic common rail injection would do wonders for it, as well as the double overhead cam... It puts out 50kw and 100Nm more than my F78.. damn

In diesels, injection is everything.. its the defining factor in how good your motor performs.

If going a new turbo, I think you need to buy a quality ball bearing unit, not just another bush/roller bearing one that will cause the same issues.

You can get a turbo that will spool nicely to 3800rpm... but will it still boost nice and low for good torque? Mine hits full boost at ~1800rpm and stays at that up to 4k.

4000rpm to often will =KABOOM

GT2871R baby....

Nah go for a HKS T51R SPL.
Hahaha

mrRocky wrote:4000rpm to often will =KABOOM

Yeah i know hey... It duzznt go over 3k very often the old girl... its only a diesel

Rocky's love 4grand

Especially the NA ones

RockyF70 wrote:Rocky's love 4grand

Especially the NA ones

x2