Also to share the Joy - 08 CRD Engine mods commenced 12 mtns ago to the day. Started out with doing research of posts mainly across this forum and was provided sound advice from various members that I was able to build on. Thanks.
Current build is CRD with NADS / ECPT ECU remap / Procharge stage 3 H/F turbo / Jonny TIG cooler / Fabwitz induction (air box and ducting/cold side) and run a max boost 25psi - All up the engine performs very well but am experiencing an air rushing sound (ringing), possible being caused from the induction air/turbulence passing thru the JT cooler at high velocity and hitting up against the 3mm aluminium cooler side tank (cold side). Noise is mainly evident when under solid load / above 18 psi boost, it is not an issue just tripping around but for the long distance driving it is a bit of a drone. The procharge pushes approx 30% more air than stock Garrett M24 turbo.
My interest is to some how suppress this noise a bit, maybe use some form of sound deadening by wrapping of the side tanks, Any ideas?
Background, may be of interest:
Went over to visit Jon (Jonny Tig Industries/Adelaide) a couple of weeks back with my new JT cooler and frame in hand. Needed to identify the mod needed for the frame to suit the GU IV CRD build variations, eg: different A/C and brake line routing and the various induction to turbo inlet hook ups. Worthwhile trip. Jon fitted up cooler and scoop for me a as part of activity.
CC ultimate and JT coolers are very similar in design. JT cooler uses a single 50mm x 90 deg elbow fitting from turbo to cooler (very compact), stock ducting for cold side to inlet manifold with a core size of 606x300x76mm/welded tube & fin with an under slung 10” spal fan.
Eng is very driveable and currently running max boost 25psi. Hauls/lugs really well for the 4 cyl. Torque low down is pleasing, EGTs have dropped significantly eg: under load hauling up a test hill that I use, 4th gear holding boost 20-22psi, dropped from 525 to 425 deg C and this is achieved with new 33" M/T where I had 31.5" BFG A/T before cooler install (525 degC). Good spool and pwr response rate and very linear. Approx 1 deg drop max across cooler (from sea level to 600m). The heat differential across cooler is significant (eg: to the hand, feels like a very hot cup of tea (hot side) to just warm (cold side).
Will confirm performance output on dyno after some more work and currently achieving nom 150rwkW(200hp) / 378N-m). Readings from onboard Ultragauge and have compared the gauge readings against past results achieved from ECPT dyno actual results so values should be close to actuals (YTBD)..
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