MB

Millway - Andover.

MB

jimboturbo

I've had a lot of dealings with chipped UK for other cars.. all good.

but not sure of the benefit if the s2000 ecu can't be remapped (Jayson does this on the RR for best results 'live mapping')

MB

No but it can be piggyback chipped - which is something they may do.

Id just be very careful on how its done.

MB

Nottm_S2

dont p1ss about.. follow bibbs into supercharger land.

he's only charging

MB

I offered free help and nobody wanted it!

MB

Nottm_S2

wrong..

i just need to raid my garage fund and you'll be well busy

mase1

if you properly tune an engine, you dont even need a knock sensor or det cans.

if you are anywhere near knock, you are doing it wrong anyways.

knock sensor are good in cases like getting a bad tank of gas or something gone haywire.

but out of the 100 plus cars that ive tuned over 400 whp. id say maybe 15% of them even use a knock sensor.

MB

I disagree. If you aren't monitoring for det while mapping, how do you know its not? If you can physically hear it without det cans its bad anyway - but its good practice to use them. I know why you are saying, that if you are anywhere near det you are doing it wrong - but you got to get a bit close After all, thats only how the knock control / timing relationship works on most OBDII cars.

In all the cars ive had mapped (world renowned guru) the car has been hooked up with a pair of extra knock sensors connected to headphones. Its just a double check you arent seeing any spikes. Plus there is no harm in doing it

A lot of the new Porsches even have individual cyclinder knock control as stock!

MB

mase1

as stated before, if you construct your ignition map the correct way from the get go, and tune the engine as you should on the dyno, you will never even get close.

detonation is the extreme, you dont have to get 'close' to make your optimal MBT.

now maybe if your road tuning, where you dont have a clue whats going on with the engine except trying to get in drivability AFR etc.., but again, thats not the proper way to tune an engine for max power either.

Reading the spark plugs will tell you a hell of a lot more than listening to det cans or watching the voltage off a knock sensor. i can show you a million datalogs where there are tons of voltage, and its not even close to knocking, so its false. a lot of these motors are modified, so the knock sensitivity is way off.

MB

I agree I wouldnt rely on a stock knock sensor voltage to measure knock for mapping, im talking about a bolt on knock sensor (non OEM) and basically a set of headphones.

While I agree on the plugs, that only tells you lean or rich. On a turbo car, you can get very rapid det spikes in the mid range, and those spikes are very destructive and wont show on your spark plugs.

I know you know this but det can range from a mere tinkling noise to someone shaking a tin of nails next to your ear. If you are pushing the realms of timing and AFR when road mapping, a set of det cans is a useful thing to have as an aid to a wideband. And why not, its not like it takes much effort.

MB