Timing

[jam1et]

Still got a fueling problem on the Griff. It might just be the timing though, so before I take it all the way down to peninsula would this be something I could get a local non-tvr specialst to do? I seem to remember in the bible it says it should really be done by a TVR specialist. Cant be that complicated surely?

My local garage are all ex renault main dealer staff and are very good. They service my 4x4 but they dont have experience with TVR's (apart from doing the MOT's on mine). What do you think?

[Guillotine]

injection timing or ignition timing?

ignition is 28 degrees (from tdc)

straight twist of the dizzy (5/8th spanner will be req'd - they won't have as they're metric!)

as for injectors...HHHHMMMMM,

must be some pulse fed to ECU to tell it to squirt. don't know how.



STEVE!

[icamm]

IIRC ignition timng is done at revs (3000?)

[Guillotine]

4000

[v8 racing]

Any more information would be gratefull to help you?
If its just the ignition timing 28 deg at 4000, most rv8 dizzys are all in by 2750 so you should have 28 at this if not you mave sticky weights

[v8 racing]

ps that is with the vacum pipe disconected

[shpub]

The problem is that the ignition timing is best set up with all that nice diagnostic stuff on it so that you can ensure that there are no problems. TVR have changed the settings so many times that there is no real black and white value but 28 ish is a good starting point. Check that there is no pinking or pre-detonation. If so it will need to be retarded.

[starmist]

I know this should be obvious, but which way do you rotate the dissy to retard the ignition. Am I right in thinking that 1 degree movement here, equates to 2 degrees of timing adjustment?

[starmist]

Oh, while I think about it, my engine was pinking quite badly over 4000rpm on full throttle yesterday, but that's the first time it's done it since I've had it all sorted out. Is it likely to be the weather causing it? (I was running on Optimax, so it shouldn't have been the fuel).

[Paul V]

I’ve been having problems with pinking on the Griff, it seems to be better on super from Esso rather than optimax that I was running before, I can cure it by running a octane booster but that is treating the problem, not curing it, I think I might need the dizzy looking at.

Anyone know what the timing should be at idle if its 28 degrees @ 4000 rpm?

[2 sheds]

starmist said:

Oh, while I think about it, my engine was pinking quite badly over 4000rpm on full throttle yesterday, but that's the first time it's done it since I've had it all sorted out. Is it likely to be the weather causing it? (I was running on Optimax, so it shouldn't have been the fuel).

Were you previously travelling slowly, i.e enough to get the engine bay really hot, this is when it's most likely to pink, also i guess the car was set up with as much advance as possible on the dyno, it might just need retarding a tad, seeing as the air temp is much higher than when the car was on the rollers.

i would wait until the next tank of fuel just to make sure it wasn't duff petrol.

Tim

[starmist]

Yeah, refilled with BP Ultimate but still the same. Spoke to Mark this morning who confirmed what you've said. I'll knock off the advance a few degrees until it disappears, until I can afford to buy / sell the missus to pay for a set of Maserati injectors.