Since being placated by being told that my CHG wasn't blown and my engine was 'as strong as an ox', I celebrated by fitting a MINES ecu. (Cheers Big_Jim)

 

Now, there's no question that it's made a remarkable difference to the car along with the decated exhaust and cone filter, but I'm not convinced I'm getting the best out of my turbos. It's worth noting that otherwise the engine is, (AFAIK), stock.

 

The most boost I get, (according to the stock guage), is one notch under the '7', but I'm sure before, (not sure before what TBH), it would go all the way to '7'.

 

So, would the ECU have, (for some ridiculous reason), reduced the boost or should I be looking at something else?

 

Incidentally, I do get the 'goose honk', which I think is kind'a cool when accompanied by the newly introduced snuffling, snorting and over-run poppage I get now, but I'd rather the whole thing was running properly at the expense of the soundtrack.

 

So my questions are.............

 

A) Is that expected boost level?

B) If not what should I be looking at to remedy it?

C) Is it time to invest in a boost controller?

 

As usual, thanks in advance! ;)

Edited June 10, 201115 yr by Big Rod

Boost controllers are always a good idea if fitted correctly I think, My car has always gone over 7 on the stock gauge, but mine has boost leaks that are yet to be found and always has had, I reckon that might be lower than standard, and from what I gather, Goose Honk is the re-circs failing, which means it's creating it's own boost leak, which means either spiked or reduced boost, depending on the scenario.

 

The Mines ECU Makes a HUGE difference I know what you mean, made mine a different car.

Take it up to this guy if you can, he comes highly recommended

 

Greg tunes the Japspeed drift team's cars amongst others

 

He was more than helpful when I dropped my mates PS13 up there a few months back

 

http://www.google.co.uk/url?sa=t&source=web&cd=1&ved=0CBgQFjAA&url=http%3A%2F%2Fwww.protuner.co.uk%2F&ei=LH3yTbnMGtOEhQeDo-3NBg&usg=AFQjCNGWa7IedCo6RXr18K7CfAhpCdf6tA

Have you fitted boost jets or some form of manual boost controller in order to increase the boost ?

 

A Mine ECU does not alter the Boost or provide any significant power gains itself. All it does is provide more appropriate fueling and timing maps to enable you to run higher boost levels, which must be controlled another way. You may notice a slight performance change with just the ECU change, but the real power change comes from raising the boost externally.

 

As for the boost gauge...is yours a Uk or Jap ? +7 on a UK is very different to +7 on a Jap, one is in PSI the other is in mmHGx100

 

Under the 7 on an Import would indicate the car is in safety mode or has a boost leak. Power will have been significantly reduced.

 

The Stock gauge is not very reliable though, and an aftermarket gauge is always a good idea.

Edited June 10, 201115 yr by Yowser

Yeah, VodkaShots did advise that I should look for a good set of recircs, (Having looked at the plumbing diagram on the thread I'm not sure how it affects it, but I 'ent no expert!), so maybe I should sort that out in the first place.

 

I must confess to not seeking balls out power, but it is addictive and am thinking on installing a boost controller but I guess I'd better 'fix' it first huh?

 

Ironically, the more of an acceleration hit you get, the shorter it lasts!! LOL But I do like that hefty kick in the small of your back!! (And I thought my N/A Supra was fast!!)

As for the boost gauge...is yours a Uk or Jap ? +7 on a UK is very different to +7 on a Jap, one is in PSI the other is in mmHGx100

 

Sorry, I had meant to say it's a JDM car.

So could I get rid of the recirc's for some BOVs or do I not know what I'm talking about here?

do you have boost jets fitted? (maybe you do and don't know?) Could be a boost spike, as you were saying it runs out of puff the higher the revs go, mine had 1mm boost jets and did exactly that, removed them, and allbeit a bit slower, the power delivery is far better, just need to invest in a boost controller now, yet more £££! :)

do you have boost jets fitted? (maybe you do and don't know?)

 

I would doubt it very much TBH. Are boost jets stock? Where would they be and what do they look like?

 

 

Could be a boost spike, as you were saying it runs out of puff the higher the revs go, mine had 1mm boost jets and did exactly that, removed them, and allbeit a bit slower, the power delivery is far better, just need to invest in a boost controller now, yet more £££! :)

 

I can't say it runs out of puff as such although I haven't tried it on my private runway yet! LOL The guage goes pretty much straight from 'goose honk' at just above ambient pressure to just below 7 and will stay there for as long as I have my foot on the throttle.

 

I also know the car's not slow either having had 'run ins' with some fairly daunting metal of late.

Oh well, sack that last idea then :)

 

Just a bit of info on boost jets for you then....

 

http://www.300zx.co.uk/forums/showthread.php?t=29063

OK, got the boost jet idea.

 

I'll check to see if it's had any fitted and progress from there.

 

So if it is as I suspect totally standard, what y'all think should be my next step(s)?

 

A) Boost controller.

B) Boost gauge.

C) New recirc's.

D) BOVs.

E) All of the above.

 

Ta muchly. ;)