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Re: Rover 1.8 VVC, pinking

Thanks to both of you for your replies - much appreciated.

> > Unsurprisingly, the replacement of the HT leads has not cured it, to be > honest I was more just hoping that the problem would 'go away' with some new > leads :) > > Anyway, > > I think what has been said about the engine running lean is completely > correct. The reason I say this is due to the following: > > When I bought the ICON race unit and fitted it, the engine pinked really > badly, i.e. it shuddered between 2 + 3k rpm and probably pinked throughout > the rest of the range although I couldn't hear anything (the tuner could > though). That was with the original Rover Fuel Pressure Regulator, which can > be anywhere between 2.8 and 3.3 bar (an average test of them on

mg-rover.org

found that they are about 2.9). > > When I fitted the 3.3 bar FPR, the serious shuddering between 2 and 3k rev > went away, and I was left with the slight pinking through the rest of the > range. > > So, what I'm saying is that it is obvious the engine is running lean. I've > purchased an FSE power boost valve with gauge and will get it calibrated > properly. I'm sure this is all that's required.

Grand :)

Even with the FSE valve / gauge, I would still seriously suggest you have it set up correctly on a rolling road with respect to CO levels, as running it lean at WOT is still going to cause a melt down - if there is pinking too the worst case scanario will be a shattered piston and a wrecked engine. The K series is pretty tough, but fragile when you let it pink or run lean.

Tim..

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Tim (Remove NOSPAM.
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Tim,

what do you think a 'default' setting should be when i first get the gauge then, as in before I get it set up completely on a rolling road?

According to FSE: "New Power Boost Valves are pre-set with a maximum fuel pressure of 2.5, 3.0 or 3.5 bar, depending on the vehicle in question,"

So, mine pinked really badly on 2.8-3.0 bar, 3.3 is better but not quite there. Therefore is 3.5 a good idea, or can they be made to go higher?

Reply to
Major Bowelcollapse

You can go as high as the fuel pump / filter / lines will stand! Typically about 6bar, although flow rate will drop to not alot at this kind of level

As the increase in fuel flow is the sqaure of any increase in line pressure, you really shouldnt need much of an increase. I'd go with the 3bar valve and set it up to 3.1bar with an accurate gauge at atmospheric pressure. As you are aware line pressure will drop with the vaccuum connection present and the engine running with a closed throttle.

Tim..

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Tim (Remove NOSPAM.

Tim

I'm not sure i understand the thinking here - if my current Fuel Regulator is calibrated to a maximum of 3.3 bar, surely this isn't enough pressure, as the engine is pinking.

Surely this means then that the maximum pressure of the FSE Power Boost Valve should be set to a maximum of something greater than 3.3 bar? (i.e.

3.4/3.5 bar?)

I agree with the vacuum pipe connected and at closed throttle it's something like 0.5 bar less, so I understand this part.

thanks again for your help - much appreciated.

Reply to
Major Bowelcollapse

Sorry- in your previous post you said the stock FPR is 2.8-3.0 bar at 1bar atmospheric. And you have pinking, I would also expect you to have some hesitancy too if its this lean.

So if you get an FSE valve, start at 3.1 bar and increase it first to stop the pinking, and secondly in conjuction with Co level in the exhaust pre cat.

If its still pinking at ~3%CO at full power (dont run it at full power if it is pinking mind else you;ll have fragments of piston!) something is wrong.

3.5% is plenty rich enough for full power and no pinking.

Tim..

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Tim (Remove NOSPAM.

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