Ben's R32 Gtst Build

[zebra]

was it the same cylinder that has injector issues?

if it was getting stuff all fuel, would be getting rather toasty in there

[sav man]

We quickly tested injector 2, and it didn't seem to spray correctly. It wasn't a definitive test at all. But Cylinder 2 melted the plug, so it makes sence that the injector was playing up.

[Roy]

I have heard of a few people having problems with spark plug tips...probably nothing to do with it but what plug gap were you running? These days I am mega delicate when gapping plugs as I would hate a plug tip to kill my mega dollar crate motor

[zebra]

I thought you could buy RB20's for less than a set of Copper plugs....when servicing time comes up you just chuck another motor in?

[Roy]

Its frustrating that the engine swap costs as much as the RB20...even though they are cheap you still dont like losing engines. By the time you put an oil flush through, coolant, oil, timing belt and swap over pumps or new pumps....plus your time...it sucks to lose an engine!

[zebra]

Yeah I hear you!

Went through 3 rb25s including a 7k built one in 3 years

Plus the pain of swapping them over is the worst

[sav man]

they are NGK Iridiam were gapped at .6

[zebra]

That may be an issue. Everyone I have spoken too says don't re gap iridium plugs as it makes them brittle

[sav man]

pics of the damage

[zebra]

not as bad as I thought it would be.

New motor or fix this one?

[sav man]

not sure yet, still adding it all up, and trying to work out why it leaned out. after i got the exhaust off, it was obvios that cylinder 2 & 5 were lean, as the ports were white, and all the other were black

[zebra]

Weird that it was only two!

I would be sendig the squirters off to be tested ASAP

but hey least you didnt pull your plugs out to find the biggest mystery since the Orient Express.

3 days ago these plugs were oily.

today...rust?!?!?!

lol....I think

[sav man]

head gasket? water in the oil.

[zebra]

oil looks brand new (it is only 400ks old though), and no water usage (that I can tell)

[sav man]

After a chat to my tuner tonight, we have come to the conclusion that the plug was the wrong heat range (too hot), and the long pull along the straight overheated it and killed it. The exhaust port was probably clean because the valve was busted and raw e85 was going through the port and cleaing it. I have also discovered that the valves on cylinder 5 wern't seating properly, hence the clean port.

I'll get the injectors checked regardles.

[Roy]

Fark...so where to from here? Just re-trace your steps and give the same setup another go?

[sav man]

I can either put high comp pistons in my DET engine, this would give me piston oil squirters, and a stronger engine. Or repair the DE head, and replace the piston and rings.

The pistons would cost $1190, and the machining cost is going to be the same either way I go.

[zebra]

To me the $1190 sounds like good insurance

[DJRIFT]

yea but if you have a look at the damage caused to the piston it hasnt cracked or done anything elce. you would think if it was on its limit it would have shit big time.

[BOZ22N]

Get some supertech pistons from Te states they're sorta cheap and repair your DE head then give it stink!

Hehe