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wastegate
Regular

Location:
Gold Coast
Registered:
May 2002

Re: Found Flow Limit on 1JZ Turbos

Tue, 26 August 2003 01:41

HedgehogSandwich wrote on Tue, 26 August 2003 01:30

So far the hybrids are the only mod (apart from the koyo, ATF cooler and shiny bits Very Happy

). Anyway, i was going to run them at 1.25 bar for a while.. quickie questions..

1) whats the stock fuelling like at 1.25 bar with an FCD clamped just below 1bar 5v?

Not good, they are only like 370cc injectors. I wouldn't go above 1 bar without bigger injectors and a computer of some sort to control them (power fc, motec, even a greddy emanage, not sure on simple ones like a Apexi SAFC)

Quote:

2) Ive got the first ever versions of these hybrids, and they didnt enlarge the wastegates (later versions had them altered), so am i likely to see problems with the wastegates at 1.2-1.3bar then? What will happen at that point?

Not sure

you might start seeing the same problem with the boost starting to be uncontrolable.

Quote:

Im currently running a very steady 0.9bar standard boost, no creep and with an FCD i dont think id creep omuch over 1bar.. boost seems solid. maybe this is because the standard Y pipe is restricting the flow and making the wastegates work better at that boost?

BINGO!! That stock Y-Pipe is restricting flow and therefore helping the wastegates now. Very Simliar problem happens on the Jap 2JZ.

Quote:

3) Standard JZA70 intercooler (but cleaned internally) ..will it cope at 1.25bar?

Ahhh ok you also have the stock IC then, no wonder your not seeing any problems Very Happy

I'm not sure on the IC holding that but I have seen others explode in the past.

Quote:

Wastegate.... how difficult was it to remove the 1JZ inlet manifold? Got any piccies of removal or instructions? I need to polish it, as you can see its the only thing missing from the polishing job Very Happy

eeekkk "runs screaming"

It's a real Pain in the Arse. More so if the engine is in the car. It's not as hard as the 7M not it's alot harder than a 2JZ.. I did it with the engine out of the car, took it off with the wiring loom in it. I can't imagine doing it in the car.

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