Tuning boost with stock ECU + a rising rate reg

[Kedderz]

Its not just a fuck load of fuel, you need to pull timing when adding boost.

[thechuckster]

my experience with a malpassi RRFPR was that it was shit:
- unpredictable pressure variations when on boost
- unstable pressure regulation when not on boost
...making real-time or post-event data log analysis useless.

I got a 2nd-hand Sard (non-RR) off here for eBay price and tuning got 100% easier.

The Malpassi units seem better suited to carbi setups (for boost or NA) - they flow a lot at low pressure but are crap at higher pressures.

my gut feeling is that you'll barely get within 20% of ideal.

I've never liked interceptors and have little experience with them. I do think they are wildly over-priced and in a functioning car, seem to cause more grief than good (but take this a merely an observation based on hearsay).

All the megasquirt stuff is stand-alone not interceptor-based tho folks have run them for fuel or spark only with the existing factory management in place.

You could make your own interceptor loom to get a Microsquirt to do fueling only but you'd have issues with either sharing sensor data (for CLT, MAT and TPS) or installing separate sensors.

Most folks tend to make an adaptor loom to swap out the factory ECU but later re-installation of it. That way, you only have to run a MAP line to the ECU and do some calibration work to use the existing sensors.

I'll see if i can find examples of the Microsquirt running on big bike motors. A lot of folks to post their setups to make life easier for other users.

[CrUZida]

If all you want is extra fuel, just add another injector that squirts only during boost.

[Shifty]

Its not just a fuck load of fuel, you need to pull timing when adding boost.

aaaaaaaaaaaaaaaaaaaaaaaaargh don't you people read!??!

[Kedderz]

All I really want is something to run the stock ecu down low, and tip in a fuckload of fuel on boost. i'd not have thought that hard, but apparently so!

I did it seems.

[Shifty]

my experience with a malpassi RRFPR was that it was shit:
- unpredictable pressure variations when on boost
- unstable pressure regulation when not on boost
...making real-time or post-event data log analysis useless.

I got a 2nd-hand Sard (non-RR) off here for eBay price and tuning got 100% easier.

The Malpassi units seem better suited to carbi setups (for boost or NA) - they flow a lot at low pressure but are crap at higher pressures.

my gut feeling is that you'll barely get within 20% of ideal.

I've never liked interceptors and have little experience with them. I do think they are wildly over-priced and in a functioning car, seem to cause more grief than good (but take this a merely an observation based on hearsay).

All the megasquirt stuff is stand-alone not interceptor-based tho folks have run them for fuel or spark only with the existing factory management in place.

You could make your own interceptor loom to get a Microsquirt to do fueling only but you'd have issues with either sharing sensor data (for CLT, MAT and TPS) or installing separate sensors.

Most folks tend to make an adaptor loom to swap out the factory ECU but later re-installation of it. That way, you only have to run a MAP line to the ECU and do some calibration work to use the existing sensors.

I'll see if i can find examples of the Microsquirt running on big bike motors. A lot of folks to post their setups to make life easier for other users.

I agree that malpassis are shit, they're unreliable and all over the place. I was talking a quality unit like a Vortech etc

As for interceptors I had a Power Commander on my ZX12R and it was great - 174rwhp from less than 1200cc with great economy, reliability, no popping or backfiring... it was great. As with a lot of things you're still cutting corners but there's dollars and then there's DOLLARS and you have to be realistic about what you can/can't afford/justify.

Where people go wrong is that generally the type of people who use interceptors are the people who cut every corner possible so the setups never work... or they use an Apexi Sard P-FCON-V-AVCR--SAFC- DBC-IDB-DVDA-A2M all at once and wonder why shit is hard to sort out.

[Duk]

The only interceptors worth using are the few that modify the actual injector signal based on a rev/load maps, rather than try and fool the factory ecu by modifying the load sensor (TPS in your case).
They can also provide you with decent, accurate ignition timing adjustment (if required) and inlet air temp. compensation maps (both fuel and ignition).
The only 1s I've found are the E-Manage Ultimate (allow you to both add and more importantly, remove fuel if you use bigger injectors.
AEM do something similar, but it's contraption doesn't allow you to advance the ignition timing. Probably not a huge issue.
And I did see another system, but can't remember the name.