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A community TV station car show featured Hillbilly's outstanding twin turbo 1UZ Holden tonight, along with his son's RB20DET HQ. They started with a feature on his son's car, during which I was thinking that a 2L was a little light on for an HQ, and he should have gone with a turbo 1UZ... Then...

The original part number has been obliterated, as you'd expect at the markup they must be making. I did a quick look round on the net to try and identify it, but I didn't get anywhere. I will post the thesis online.

Tuning yourself is good! But you also have to pay for your mistakes, so be careful! From a tuning point of view, it makes no difference which manufacturer produced the engine, the techniques are exactly the same when tuning a standalone. (There may be minor differences between sync signals and...

Got squish?

I typed out a lengthy reply this morning, but the posting failed and I lost the lot, so here it is again in point form: Piggyback systems are dodgy. Don't know if SMT7 can apply correction maps to fuel and timing ONLY when output (nitrous) is triggered. SMT7 can only adjust fuelling by...

Hi Jibbby, It really depends on your setup, so give us some more details! In particular, what engine management system are you running, or intend to run with your turbo setup.

Always a pleasure to have such an interesting discussion! How are you detecting knock on the dyno? I have a Link Knock Block wired into the car feeding a 0-5V analog signal to the SM4, which I use to retard timing if knocking occurs. Along with the wideband O2 controller, this allows me to...

MBT is an acronym (of sorts) for 'Minimum Spark Advance for Best Torque). For any engine there is a position in the power stroke (usually 15-20 deg ATDC) where the peak cylinder pressure should occur in order to achieve maximum torque. This position is dependent only on engine geometry, not...

If you are just doing a little aluminium welding, the regular liner will be fine. Run a slightly larger tip than the wire (0.1mm over) to allow for the expansion of the aluminium wire. Straight argon is the go for shielding gas.

I am writing a thesis on water injection for knock suppression at the moment. Once I finish my testing I should be able to give you some more detailed information, but current (old) literature suggests about 10% of fuel volume is the optimum rate for water injection. Distribution is critical...

Hi Justen, I didn't get an itemised invoice, the whole kit was 490 pounds or $1239AUD. Freight and import duty was about $500 more! The 4 way splitters were included, they are listed on Aquamist's website. They (and alot of other useful fittings) are available through local suppliers like...

Plumbing to the jets. At this stage I am only using two check valves, which are obscured by the 4mm nylon lines.

8 x 0.3mm jets spraying at 125psi. Atomisation is very good!

Jet adaptors installed in lower intake manifold.

Here is the water injection hardware:

Hi Rod, I have an aquamist rebadged Shurflo pump with 125psi internal bypass and a small accumulator. This feeds an Aquamist HSV, controlling flow to 8 port mounted nozzles, all with inline check valves to keep the system full up to the nozzles at all times. I PMed you a while ago when you...

Well unless I missed it in your oversized images I can't see: 1. A purge valve? Not a safety precaution. 2. Fuel pressure safety cut off switch? 3. Nitrous pressure safety cut off switch? I don't use switches, I use programmable outputs which can be mapped against any sensor inputs or...

I didn't want to blow the turbo budget on a heap of nitrous fittings :saevil:

Resized Picture.

How do you know what precautions I have taken?