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[Kevin Wood]

If you've got a strong enough spark to ignite the fuel reliably the ignition system won't make any odds to power output.

Also, remember there is a world of difference between a "remap" and a "chip" although one is frequently sold as the other.

A remap, in my mind, involves getting your car on the rollers and tweaking it live to optimise the fuel and timing maps before burning an EPROM for your specific engine.

A chip is a one size fits all chip not specific to your engine. It will probably just remove some of the manufacturer's safety margin in terms of ignition advance.

Either way, when tuning a normally aspirated engine, don't expect a chip alone to give you a spectacular improvement.

Kevin

[Marks DTM Calib]

If you've got a strong enough spark to ignite the fuel reliably the ignition system won't make any odds to power output.

Also, remember there is a world of difference between a "remap" and a "chip" although one is frequently sold as the other.

A remap, in my mind, involves getting your car on the rollers and tweaking it live to optimise the fuel and timing maps before burning an EPROM for your specific engine.
A chip is a one size fits all chip not specific to your engine. It will probably just remove some of the manufacturer's safety margin in terms of ignition advance.

Either way, when tuning a normally aspirated engine, don't expect a chip alone to give you a spectacular improvement.

Kevin

And ths is where I struggle with the benefits on moern cars as the ECU's are adaptive thansk to the use of knock sensors and O2 sensors.

What most of the chips do is up the fueling on WOT (and not much more!)

[Kevin Wood]

And ths is where I struggle with the benefits on moern cars as the ECU's are adaptive thansk to the use of knock sensors and O2 sensors.

What most of the chips do is up the fueling on WOT (and not much more!)

Indeed. WOT fuelling is the only place that isn't adaptive since there is no Lambda feedback. Not sure if there's knock control under all speed/load conditions but given its' presence the ignition map is unlikely to be overly conservative.

Unless you buy a TVR, of course, where, despite developing their own engine, they failed spectacularly when it came to mapping it. Their only consideration appears to be what it sounded like on the overrun.

Kevin

[markh1]

And ths is where I struggle with the benefits on moern cars as the ECU's are adaptive thansk to the use of knock sensors and O2 sensors.

What most of the chips do is up the fueling on WOT (and not much more!)

Indeed. WOT fuelling is the only place that isn't adaptive since there is no Lambda feedback. Not sure if there's knock control under all speed/load conditions but given its' presence the ignition map is unlikely to be overly conservative.

Unless you buy a TVR, of course, where, despite developing their own engine, they failed spectacularly when it came to mapping it. Their only consideration appears to be what it sounded like on the overrun.

Kevin

I can confirm that alright! My cerb went from 363 to just over 400bhp after a decent tune up on a rolling road. It has since had some more engine mods so needs to be rolling roaded again.

As far as the omega is concerned I have noticed flat spots on mine but they are not always present.

Have you tried running it on V-power or Tesco 99ron? These fuels make a big difference to performance on the mig, its almost like having a remap! I won't run my cars on anything else.

[ScottieMV6]

Is the 3.2 manifold onto a 3.0 a straight swap? If not what work is involved?

How big are the benefits? Might think about doing this while I have the heads off the car.

[Jimbob]

Is the 3.2 manifold onto a 3.0 a straight swap? If not what work is involved?

How big are the benefits? Might think about doing this while I have the heads off the car.

iirc you need to remove the SAI system as well.

[ScottieMV6]

Is the 3.2 manifold onto a 3.0 a straight swap? If not what work is involved?

How big are the benefits? Might think about doing this while I have the heads off the car.

iirc you need to remove the SAI system as well.

I have already removed that anyway so that won't be a problem. I assume all the studs are the same etc and nothing needs changing on the heads?

[Marks DTM Calib]

You have to cut 5-6mm off the flange at the top of the front pipe that the gaskets fits over.

[steverubberduck]

I had my car rolling roaded about 5 months ago, have a few toys under the bonnet...
The bloke that did the work told me that the best mod i had was my 3.8 fpr.
Modifying the fuel flow on a mig is just as good as a remap, as all the remap on a mig will do is tell the car to use more fuel. 

[Marks DTM Calib]

I had my car rolling roaded about 5 months ago, have a few toys under the bonnet...
The bloke that did the work told me that the best mod i had was my 3.8 fpr.Modifying the fuel flow on a mig is just as good as a remap, as all the remap on a mig will do is tell the car to use more fuel. 

In which case he didn't have a bloody clue what he was talking about 

[TheBoy]

I had my car rolling roaded about 5 months ago, have a few toys under the bonnet...
The bloke that did the work told me that the best mod i had was my 3.8 fpr.Modifying the fuel flow on a mig is just as good as a remap, as all the remap on a mig will do is tell the car to use more fuel. 

In which case he didn't have a bloody clue what he was talking about 

I concur.  All  a higher pressure regulator will do is reduce the injection durations. 

[steverubberduck]

so basically, he talked himself out of a sale then?

[Marks DTM Calib]

so basically, he talked himself out of a sale then?

Quite possibly.

By raising the fuel rail pressure you simply reduce the period of time the injectors need to be open for.

The Motronic setup adapts to changes and because it has closed loop control, will learn some new adaptive values around the higher fuel pressure and nullify any change!