The postmortem

Post by **airhead** » 03 Apr 2007, 23:00

You mean overcooling then! I see your point on that one. I always had manifold icing problems with my bay. Pain in the backside that was!

So what would you go for then? An intercooled JX turbo or a stock AAZ?

Post by **HarryMann** » 03 Apr 2007, 23:09

Neither..

A water-injected AAZ with a surfeit of boost and fuel and a brand new bottom end

Post by **andysimpson** » 04 Apr 2007, 16:43

airhead wrote:You mean overcooling then! I see your point on that one. I always had manifold icing problems with my bay. Pain in the backside that was!

So what would you go for then? An intercooled JX turbo or a stock AAZ?

Yes mine overcools badly, does not have fuel problems because its injected but it leaves a right mess in the oil breather.

Post by **andysimpson** » 04 Apr 2007, 16:46

HarryMann wrote:Neither..

A water-injected AAZ with a surfeit of boost and fuel and a brand new bottom end

I am very tempted to water inject it, but my bank account is not especially after fridays incident. I have seens 1 kit from america that seems very good value and well thought out.

Post by **airhead** » 04 Apr 2007, 20:22

What sort of power increase would you be looking at with that?

Post by **andysimpson** » 04 Apr 2007, 20:59

Not exactly sure but a HUGE increase over standard AAZ. I need to start saving for when the gearbox calls it a day

Post by **Simon Baxter** » 04 Apr 2007, 21:15

airhead wrote:What sort of power increase would you be looking at with that?

Im not sure that water injection iteslf will give much in the way of power gains, but it will let you run higher levels of boost and fuelling, while keeping EGT's down. yes it will increase the density of the air

People do use water injection rather than fit an intercooler to keep EGT at bay.

Intercooler, water injection, dirty great turbo, larger pump head, bigger injectors, modified pump...yum.

Post by **andysimpson** » 04 Apr 2007, 21:30

Simon Baxter wrote:
airhead wrote:What sort of power increase would you be looking at with that?

Im not sure that water injection iteslf will give much in the way of power gains, but it will let you run higher levels of boost and fuelling, while keeping EGT's down. yes it will increase the density of the air

People do use water injection rather than fit an intercooler to keep EGT at bay.

Intercooler, water injection, dirty great turbo, larger pump head, bigger injectors, modified pump...yum.

Yeah i meant it has a huge increase already, thinking of the water injection more for cooling effects, it gets very hot very quick when pushed, the best bit was i added another oil cooler last week which made the temps more normal, under 90 rather than 120+ on the motorway.

Turbo won't boost anymore wastegate is disconnected and boost starts falling above about 5000rpm (must fit that k26), it could put a bit more fuel in though but its very sensitive to running away which is scary the first few times it happens.

Post by **HarryMann** » 04 Apr 2007, 22:49

Very scary - maybe something that strains those mains

Theres got to be an answer, even if it's an extensivley modified sump

Lots of question marks tonight

Post by **andysimpson** » 05 Apr 2007, 17:59

HarryMann wrote:Very scary - maybe something that strains those mains

Theres got to be an answer, even if it's an extensivley modified sump

Lots of question marks tonight

What it does is sometimes especially after lots of throttle when you lift off power drops but remains, if you press the clutch it will hold about 4000rpm and stay there for about 30 seconds. Easy cure is change up or brake it then behaves. Its not running on its oil, i sorted that by discconecting the breather pipe from intake, its an over fueliing problem. I do agree the sump/engine angle is a terrible design.

Post by **Simon Baxter** » 05 Apr 2007, 19:58

yep, thats what happens when you go daft with the fuel screw, also, my shafted pump I just took of the pick up was doing that, and i hadn't gone daft with the fuel screw!
'kin thing, anyway, it's on the bench now and the engine is sporting a GTD pump with JX levers! much better.

Post by **andysimpson** » 05 Apr 2007, 20:38

Simon Baxter wrote:yep, thats what happens when you go daft with the fuel screw, also, my shafted pump I just took of the pick up was doing that, and i hadn't gone daft with the fuel screw!
'kin thing, anyway, it's on the bench now and the engine is sporting a GTD pump with JX levers! much better.

Me daft? you must be confusing me with someone else

Another half turn in should fix it

Post by **airhead** » 06 Apr 2007, 00:19

Where is the fuelling screw on these pumps anyway? I was told it was on the back in the middle of the 4 injector pipes. I saw a bolt there which I undid expecting it to be behind it but it wasnt. I looked in with a mirror. So if someone can tell me where the screw is (with a pic would be even better) I wanted to try adjusting it a little.

Post by **HarryMann** » 06 Apr 2007, 08:25

I saw a bolt there which I undid expecting it to be behind it but it wasnt.

Oh dear

Its not that one, that's the timing..

Its facing the same way as that one, but up a bit and towards the head a bit, on the upper body, capped off usually, lock nut needs loosening. Very small amounts, 1/4 turns or less, unless your name's Andy.

Post by **airhead** » 06 Apr 2007, 15:00

No sorry, the bolt I undid was facing the front of the van (which I kind of thought would be the back of the pump cause the pulley's at the other end)It was in between the 4 pipes coming from the pump to the injectors. So its actually behind the timing belt cover then? Is it behind the pulley wheel or something? Am i right in saying it needs to be wound in a quarter turn? I might actually try this today while Im mucking about with the van.