22 replies to this topic

[kit352]

Or what's wrong with my car.

So my 998 has always liked high timing. Currently sitting at about 15 degrees. I've set it using both a timing light and by rising revs and I always end up there. Any higher and I start pinging and lower doesn't run nearly as good. The motor is stock except for a stage 1 kit but has been rebuilt in its past so maybe they messed something up? Heads and pistons are stock at any rate, Ive done a head gasket which is why I'm timing it again.

[Spider]

It could be a several reasons for this.

Are you setting it with or without the Vacuum Advance connected ?  Should be done with it disconnected.

The Mechanical Advance Springs could be weak, giving more advance at low speeds than it should have.

 

If you are using the Harmonic Damper (if it has one) and Timing Chain Cover marks for checking it, the Damper may have slipped or failed and the outer ring moved.

[68+86auto]

You need to check the timing throughout the RPM range with the vacuum disconnected.

[kit352]

Yes, vacuum is removed and plugged while I set timing.
I will have to look into the springs. I hadn't thought about that.

[Lplus]

15 degress at what revs?  Cranking speed?  1000 rpm, 1500 rpm?

[kit352]

1000 rpms. My car doesn't like the factory 850 setting.

[68+86auto]

1000 rpms. My car doesn't like the factory 850 setting.

 

What's it doing at say 2000rpm and 3000rpm?

[Spider]

1000 rpms. My car doesn't like the factory 850 setting.

 

Given that you mentioned earlier that it's a 998, I'm not surprised.

[68+86auto]

 

1000 rpms. My car doesn't like the factory 850 setting.

 

Given that you mentioned earlier that it's a 998, I'm not surprised.

 

 

I'm thinking that they mean the idle is set to 1000rpm instead of 850rpm. If that's the case then there's probably more of an issue than just timing.

[Designer]

Hi kit352,

 

I am slightly baffled here. I refer to my post   " A Professional Tuner In Surrey"   in which you pointed me in the direction of a firm called  "Vmaxcart"  near me.

May I ask have you actually used this firm for tuning your Mini or was it just a Google search? Which I did but they were not shown.

I ask this as you seem to be having problems which I would have thought they would have resolved if they had done the tuning.

I do not want to book the Moop in with them if they are not capable of tuning a Mini.

 

Paddy

[Spider]

 

 

1000 rpms. My car doesn't like the factory 850 setting.

 

Given that you mentioned earlier that it's a 998, I'm not surprised.

 

 

I'm thinking that they mean the idle is set to 1000rpm instead of 850rpm. If that's the case then there's probably more of an issue than just timing.

 

 

Fair point in which case, that's my bad - sorry for that !

[kit352]

Hi kit352,

I am slightly baffled here. I refer to my post " A Professional Tuner In Surrey" in which you pointed me in the direction of a firm called "Vmaxcart" near me.
May I ask have you actually used this firm for tuning your Mini or was it just a Google search? Which I did but they were not shown.
I ask this as you seem to be having problems which I would have thought they would have resolved if they had done the tuning.
I do not want to book the Moop in with them if they are not capable of tuning a Mini.

Paddy

I no longer live in the UK so I'm on my own with tuning. Stuart is probably the best in the area.

[kit352]

1000 rpms. My car doesn't like the factory 850 setting.

What's it doing at say 2000rpm and 3000rpm?

I haven't checked the timing marks at that high of an rpm. That would put me on the advance curve correct?
If your asking how it's driving I would say perfectly. As I mentioned earlier, the motor doesn't love low rpms. It gets boggy

[68+86auto]

 

 

1000 rpms. My car doesn't like the factory 850 setting.

What's it doing at say 2000rpm and 3000rpm?

I haven't checked the timing marks at that high of an rpm. That would put me on the advance curve correct?
If your asking how it's driving I would say perfectly. As I mentioned earlier, the motor doesn't love low rpms. It gets boggy

 

 

Yes that RPM will get you into the advance curve. That will help determine what the advance is actually doing, it could be advancing at idle. It should easily idle at 850rpm. Are you running points or electronic?

 

 

 

You may want to update the location in your profile.

[Lplus]

 

 

1000 rpms. My car doesn't like the factory 850 setting.

What's it doing at say 2000rpm and 3000rpm?

I haven't checked the timing marks at that high of an rpm. That would put me on the advance curve correct?
If your asking how it's driving I would say perfectly. As I mentioned earlier, the motor doesn't love low rpms. It gets boggy

 

1000rpm may well be on the advance curve already.  Personally, I wouldn't exceed 10 degrees btdc at 1000 rpm - advancing the timing to the point just before audible detonation puts the engine on the edge of damage.  That said we have no idea of the age of the car, the number on the distributor, nor the grade of fuel you are able to get for it.