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Discussion Starter · #1 ·
Hi all

Took a chap out tonight for a test drive and when he accelerated hard there was a rattling sound when the car got up to 4-5k RPM. He instantly said "ooh, that sounds like pinking".

I had no idea what pinking was until he explained, told me it was bad and stated he was not going to buy the car.

So what should I do to diagnose this further? The car has an M45 Supercharger so am not sure if I can do the standard ignition timing check now? Could it be something else?

Will an "ordinary" garage be able to help?

I want to get this sorted but am conscious of the cost eating into my asking price!

Any advice very welcome and recommendations of specialists in the Hertfordshire region would be useful.

Ed
 

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whats your spec standalone ecu ? etc
 

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Get it tuned and sorted properly or make it perfectly clear that the tune / setup is NOT optimised and needs to be. The latter puts the onus on the buyer providing you don't hide the truth. Good to hear that your being reactive rather than dismissive.
 

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You just need a tune to sort your timing curve out, not a normal garage but one familiar with emanage and ideally on a rolling road/dyno
 

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Any idea how much this might set me back?

Tempted to explain to potential buyers and knock £250 off the price.
Will probably cost you about that, but the car will drive better as a result.

To answer the original question, you could still retard the base timing with the EMB, but doing this will sacrifice power and drivability over the entire rev-range in addition to stopping the det. It's a quick cheap fix mind.
 

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Discussion Starter · #8 ·
Any idea how much this might set me back?

Tempted to explain to potential buyers and knock £250 off the price.
Will probably cost you about that, but the car will drive better as a result.

To answer the original question, you could still retard the base timing with the EMB, but doing this will sacrifice power and drivability over the entire rev-range in addition to stopping the det. It's a quick cheap fix mind.
[/quote]

Ah, ok. Presumably if I restrict my driving to keep the revs below where it begins to pink I can avoid further risk of engine damage in the meantime?

I think I might bite the bullet and get a specialist to look at it. Not sure cutting the power across the rev range is going to assist with the sale!

Thanks

Ed
 

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Any idea how much this might set me back?

Tempted to explain to potential buyers and knock £250 off the price.
Will probably cost you about that, but the car will drive better as a result.

To answer the original question, you could still retard the base timing with the EMB, but doing this will sacrifice power and drivability over the entire rev-range in addition to stopping the det. It's a quick cheap fix mind.
[/quote]

Ah, ok. Presumably if I restrict my driving to keep the revs below where it begins to pink I can avoid further risk of engine damage in the meantime?

[/quote]

Don't go full throttle, it's not revs the issue per-say it's engine load.

Full throttle at low revs can be worse.
 

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Engineers Do It Better.
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Who set it up originally? What fuel was it running on at the time?
Perhaps it is optimised to run on premium? You could try premium in it and see if that stops it
 

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Will probably cost you about that, but the car will drive better as a result.

To answer the original question, you could still retard the base timing with the EMB, but doing this will sacrifice power and drivability over the entire rev-range in addition to stopping the det. It's a quick cheap fix mind.
Ah, ok. Presumably if I restrict my driving to keep the revs below where it begins to pink I can avoid further risk of engine damage in the meantime?

[/quote]

Don't go full throttle, it's not revs the issue per-say it's engine load.

Full throttle at low revs can be worse.
[/quote]

full throttle at low revs can be more prone to pinking as the charge has more time for pre-ignition. however because the engine speed is low you won't really do any damage as there's no heat there so don't be too scared if it's just pinking (be scared if it's knocking tho)

if you're hearing pinking at higher revs tho this could lead to knock and be a lot more destructive so back off the throttle to reduce the load. i barely need to go above 40% throttle on my drive to work (although it's not much fun)

you need to sort it tho, either by changing your base timing or retuning the EMB.
 
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