Replacing the Stock WRX intercooler?

[mrex180]

Thanks, so far with out tuning and running low boost 13-14psi the actual response isn't any better down low and through the midrange than before, it's only when the tacho goes past 5k that i can notice the real difference and the restriction that the stock IC presented is gone it really shifts through the revs quickly.I'm running 2 x 0.5mm jets , i'm unsure of the pressure, the pressure switch is left set at what ever came from the factory with 2c Kit but i will try and get it set to max pump pressure.. Can't wait to get the Knocklink and couple of other little things sorted and get 19psi flowing. :twisted: i can also here the boxer rumble coming through the induction side too sounds wierd.. And i can't really get a good temp measurement as the stainless piping is holding the engine bay heat so looks like i'll have to get a AIT sensor & gauge.

Andy

[mrex180]

This is close up pics of the VF24 Compressor wheel when i had it set up injecting pre-turbo awhile ago too.




Andy

[JohnA]

Very interesting

Can you tell us at what boost level your precomp injection was activated?
Was it pure water?
How many litres of water did you go through (roughly!) to get to this stage of tip erosion?


PS
I'll use these pics on my website if you don't mind, there is precious little on precomp injection out there anyway...

[mrex180]

I had it it activated on about 10psi, as it was a fair while ago when this hapened and i had it only on for about 3 weeks and it would have only gone through 2 Liters at the most and the mix would have been rain water and Isopropyl alcohol.No probs with the pics :wink

[JohnA]

Originally Posted by mrex180

I had it it activated on about 10psi,

10psi is a bit low for the usual nozzle placement (facing the airstream at 90degrees)
I wouldn't let it activate before 1 bar.
OK, boost pressure is on the other side of the intake, but it is an indication of the sort of airflow passing in front of the nozzle.

.No probs with the pics :wink

thanks

[Richard L]

Originally Posted by mrex180

This is close up pics of the VF24 Compressor wheel when i had it set up injecting pre-turbo awhile ago too.




Andy

How far is the nozzle away from the compressor wheels? I wonder if things could improve if the nozzle is closer to the wheel.

[mrex180]

The jet was placed approx 360mm from the turbo in the silicon intake pipe which is a spare port that normally would be blocked off.

[mrex180]

UPDATE: 19/03/06

Installed the Knocklink today and set it at max sensitivity and when for a drive, what it displayed under WOT reading and the boost from the 20G just under 1 bar was no LED's up until 6000rpm, then about 6100 there was 2 greens then at 6500 both oranges then just under 7000 the big red (well a lot of reds and i backed off in a hurry then) .Car is still not tuned and i have removed the Bosch 910 pump and surge tank until i put the 044 pump in so the OEM pump at a guess is probably not up to the task with 660cc injectors and the added airflow up top now there's no restriction from IC anymore, just got to keep it under 6000 and be sensible until the pump is fitted and the car is tuned..


Andy

[Richard L]

I was wondering if you can run your car up to 7000 with lower boost setting. The engine get noisy beyond 6000, the knock indication may not be purely knock but other noises. This will give a fairer results.

Richard

[mrex180]

I'll try that Richard, i may even just run it too 7000 trying not to use any boost and see what it does and just see if it is just engine noise.