Aussie 250 turbo questions

[Unfalconbelievable]

Hi all. I currently own a 250 crossflow out of an 1986 XE falcon. I've recently bought an EFI manifold on E-bay and am looking at buying a TO4 turbo. What I want is a torquey engine with a 5-5500RPM redline using around 15psi boost. My thoughts were 7.5:1 comp forgies, aftermarket rods n bolts, port job, with a custom cam, water-to-air intercooler and a custom exaust manifold all controlled by a Wolf 3D ECU. The water to air intercooler will reduce intake piping helping to reduce lag. I need to know what size injectors to use and is 15psi gonna b too much for 7.5 comp, should b good right? Also is the TO4 going to spool up good or is it too big? The 250 should have heaps of exaust flow to spin it! Info from people who've done this or similar would be appreciated

 

[TCSTEVE]

Hey unfalconbelievable, welcom to the forum.
To answer your questions youll need to talk to a turbo guy cause depending on your application street or strip only youll need to play around with numbers especially on the turbos compressor and housing sizes.
exhaust,bottom end and good trans and gear ratios will be needed also to turn all that torque into traction.
Wolf 3D should do fine, injectors well you would be looking at a 60 or so cc item and then choose the right signal for it too, which is beyond my knowledge. Bigger fual lines and regulator etc will be needed too.
Good luck with it. Steve

 

[gassed250]

I had a T04 on a 250 it had a 70front cover and a 100 exhaust housing, spooled realy good and was strong to about 6000rpm

I had a custom Camtech cam and it was spot on part number> 503B/503A-113
Specs

Advertised
duration> in 264 ex 258

Duration@
.050" cam lift> in 208 ex 201

Lift at cam> in 276 ex 268

Cam lift @
T.D.C.> 035

Intake centre line> 109deg A.T.D.C.

Lobe separation angle> 113deg

Intake opens @ 18deg

Intake closes @ 66deg

Exhaust opens @16deg

exhaust closes @ 62deg

I was running 7.5 compression and ran 10psi but could go to 15psi I also had water injection