Steve Terzo

Can anyone tell me what the boost cut is on my Terzo, as I've only seen figures for >96 or 99 onwards.

Cheers

Steve.

Ps what turbo does it have?

GavinP

Steve,

I *think* that the 97/98 cars are also 15.5 psi (1.07 bar).

I'm 99% sure I read somewhere that boost pressure (and fuel cut) was only raised on the MY99 cars onwards.

I'm sure someone with a 98 knows....

Thanks

Gavin

Steve Terzo

Thanks Gavin.

Interestingly (for me) I see around 1.2 bar on spool up with my HKS mechanical boost gauge, before it settles at 0.9 bar.
I know the ECU allows for spikes, but does this indicate a higher cut?

Steve.

[Edited by Steve Terzo - 1/23/2002 2:38:59 PM]

GavinP

Steve,

If your car boosts to 1.2bar then I think it is safe to say that the fuel cut isn't at the same level as the early cars....

You would not mistake the sensation, it is like a parachute launching out of the boot without warning!

I guess only a MY97/98 owner can tell you....

Thanks

Gavin

Steve Terzo

Gavin, I've just edited my post to make it a bit clearer.

I've hit the boost/fuel cut on a few occasions...luckily I've still got all my own teeth!


Steve.

john banks

On late cars it doesn't cut instantly. You need to be at boost for a few seconds.

Steve Terzo

Cheers John, that makes sense.

Can anyone with a MY98 clarify the cut out level?

ktulu

somebody please answer this!!!!!

about to fit the dawes to my MY 98 and would like to know where the cut off is before my head goes through the windscreen!

john banks

Head through the windscreen is a little dramatic. If you are finding it do it on a straight dry piece of road for safety - it is like backing off the throttle instantly when on full boost.

NM

With ref to my post

http://www.scoobynet.co.uk/bbs/threa...threadid=66727

Since adding Optimax my MY98 seems to now Overboost. The Boost Gauge was showing 14 psi max peak boost b4 I started getting Overboost. Not sure what the boost level is now keep running out of road in cov town centre

Hope this helps

AndrewC

I own an MY98 and use a bleed valve to increase the boost a bit (with a Boost Gauge and AFR meter).

My boost gauge under reads by about 1PSI and I can get it to hold an indicated 16PSI in 4th so I reckon the boost cut is comfortably over 17PSI (~1.17bar).

I also remember reading (a long time ago) about Nito and his MY98, using an EBC he was running about 1.15-1.2bar (16.67-17.40psi) about this time I remember reading that the boost cut is somewhere between 1.2 and 1.25bar (17.40 -> 18.12bar) varying slightly from car to car.

My own experience is that my car has overboosted when the needle on my (not very accurate) boost gauge has been close to an indicated 17psi.

Andrew...

PS. Anyone who has only driven a post MY99 will not understand why pre MY99 owners are so worried about the fuel cut, it is **very** severe and quite disconcerting, never mind what it does to the transmission.

[edited to add more info]

[Edited by AndrewC - 1/24/2002 1:18:09 PM]

GrahamF

For info I had a fault on my MY98 which allowed it to overboost. The cut came after about a second at just a tad over 20psi on my probably not very accurate gauge. Having cured the fault it now pulls a steady 15-and-a-tiny-bit psi in 5th.

graham

motomc1

HI ALL FUEL CUT ON MY 98 IS 1.25 BAR...

Darren king

Could it be said that the MY97 is the same as the MY98 fuel cut? I'm waiting for my Dawes to arrive and want to get it set right.