Search found 310 matches

by Rod S
Wed Mar 28, 2018 7:52 am
Forum: General
Topic: Sequential Siamese VE Tables
Replies: 25
Views: 7968

Re: Sequential Siamese VE Tables

The issue here is the second trigger overlaps the primary so you must ensure you have the right edge selected in TS to be the one before the primary. I can never remember which way around TS displays them in the trigger log but I suspect you should be using the falling edge and your msq is set for r...
by Rod S
Wed Mar 28, 2018 2:34 am
Forum: General
Topic: Sequential Siamese VE Tables
Replies: 25
Views: 7968

Re: Sequential Siamese VE Tables

The 80 degrees is fine, you just enter the actual figure through TS. The reason somewhere around 90 is required is because it's midway between the peak compression pressures (ie TDC) of No.2 and No.1 (on a 4cylinder engine) so the point cranking speed is most stable so most likely for the ECU to rea...
by Rod S
Tue Mar 27, 2018 9:21 am
Forum: General
Topic: Sequential Siamese VE Tables
Replies: 25
Views: 7968

Re: Sequential Siamese VE Tables

First, you definitely need your cam signal earlier than 80 degrees if you are using a traditional 36:1 or 60:1 (or similar) primary wheel with the missing tooth set at the traditional 90 BTDC - that is because the MS code (I think all versions) needs to see the second trigger just before the primary...
by Rod S
Tue Mar 27, 2018 5:51 am
Forum: General
Topic: Sequential Siamese VE Tables
Replies: 25
Views: 7968

Re: Sequential Siamese VE Tables

Dave, yes the zigzags follow the cycles of No1 and No2 cylinders. Ignore the numbers 3 & 4, with hindsight (as usual) it just confuses things. If I ever get to do the write-up I will make it much clearer. So ignoring the numbers 3 & 4, the phase marker on my JimStim is at 120 BTDC on No1 at the comm...
by Rod S
Tue Mar 27, 2018 2:29 am
Forum: General
Topic: Sequential Siamese VE Tables
Replies: 25
Views: 7968

Re: Sequential Siamese VE Tables

My bad wording again. If you are going to use end of pulse then the figures can be negative (ie, ATDC) but -175 just seems too extreme. If you look back at the plot I posted on MS-E (I'll have to get it re-hosted to post it directly here) http://www.msextra.com/forums/download/file.php?id=51214&sid=...
by Rod S
Tue Mar 27, 2018 1:33 am
Forum: General
Topic: Sequential Siamese VE Tables
Replies: 25
Views: 7968

Re: Sequential Siamese VE Tables

Jean's description of timing probably explains it better than I have done, if I ever finish my write-up I shall copy those words exactly. When you refer to Jean's write-up, assuming you mean this one http://jbperf.com/sequential/index.html it covers all the options so you need to pick out the specif...
by Rod S
Mon Mar 26, 2018 8:58 am
Forum: General
Topic: Sequential Siamese VE Tables
Replies: 25
Views: 7968

Re: Sequential Siamese VE Tables

I think I probably confused things a bit in the answer I gave initially on the MS-E form (I'm "Retired" on MS-E) and trying to explain it better later didn't work (although he got there in the end...). What I was trying to say is the first injection event, on a single channel of the MS2, occurs on t...
by Rod S
Mon Mar 26, 2018 5:49 am
Forum: General
Topic: Sequential Siamese VE Tables
Replies: 25
Views: 7968

Re: Sequential Siamese VE Tables

I haven't seen your post on the MS-E forum - I do check occasionally for anything related to the siamese code as I use and it's always useful to see what others are up to - but just to add to what Jean has said, of the people I know who are running the siamese code, I'm not aware of any who are usin...
by Rod S
Fri Mar 23, 2018 7:44 am
Forum: I/O Extender
Topic: 5 Vref
Replies: 16
Views: 8586

Re: 5 Vref

Why not just use a passive averaging circuit , ie, do it in hardware, just a bunch of resistors ? I'd assume the IOx input impedance is high enough, worst case you might have to do a custom calibration or, second worst case, use an Op Amp averaging circuit (resistors plus Op Amp) which would "ignore...
by Rod S
Thu Apr 13, 2017 11:43 am
Forum: I/O Extender
Topic: T-IOx 0.2.0 firmware
Replies: 1
Views: 1262

T-IOx 0.2.0 firmware

Jean, With the new "stand alone" mode mentioned here http://forum.jbperf.com/viewtopic.php?f=9&t=1558 (which I am well familiar with), but particularly this point, "The other major change is the serial port. It is now possible to use the serial port to communicate between the PC and the TinyIOx for ...
by Rod S
Fri Dec 23, 2016 4:18 am
Forum: I/O Extender
Topic: TinyIOx
Replies: 142
Views: 160253

Re: TinyIOx

As Ken says, probably one for Jean. I only have one T-IOx so can't try to replicate your problem but I also have a full size IOx and an IOx-OEM and, although I usually only use the Tiny and the IOx-OEM together, I have had all three on the same bus without issues. Quite a pain (well for me anyway) t...
by Rod S
Wed Dec 21, 2016 4:54 am
Forum: I/O Extender
Topic: TinyIOx
Replies: 142
Views: 160253

Re: TinyIOx

As Ken says, yes, they need to use different addresses. If you have a full size IOx and a Tiny (as I have) then the default addresses are different to start with but once you have two of the same you will have to change one of them. And the latest port scanner is by far the easiest way. You then nee...
by Rod S
Sat Sep 24, 2016 1:46 am
Forum: I/O Extender
Topic: Wideband map compensation?
Replies: 17
Views: 12116

Re: Wideband map compensation?

Jean, If your point is that the information in the datasheet isn't accurate enough - and I agree they could have provided a more detailed graph or even a table - the simplest way I can think to validate it without all the test gases etc. that Alan has is to simply install an LSU and pressure tapping...
by Rod S
Fri Sep 23, 2016 1:53 pm
Forum: I/O Extender
Topic: Wideband map compensation?
Replies: 17
Views: 12116

Re: Wideband map compensation?

This will require connecting a pressure sensor to the MegaSpartan on one of the TBD position on its connector. As for the pressure data, I assume this will be available over CAN. That would work in a similar fashion on the TIOx/IOx. So in one of your IOx/ T-IOx plus 14point7 setups (Spartan and hop...
by Rod S
Fri Sep 23, 2016 3:36 am
Forum: I/O Extender
Topic: Wideband map compensation?
Replies: 17
Views: 12116

Re: Wideband map compensation?

Yes, I am. Once I have more data from Alan, I will also look into adding the pressure compensation into the TinyIOx and IOx code. Jean, will that still be from an independant MAP type sensor or has Alan come up with some way of calculating the pressure from some of the other LSU parameters ? Obviou...
by Rod S
Fri Aug 19, 2016 4:43 am
Forum: Dual VR
Topic: MX5 / Miata - Pulses Per Mile
Replies: 2
Views: 1760

Re: MX5 / Miata - Pulses Per Mile

Hi, Re. the turning wheels to work it out, that's fine, I've done it myself. Just bear two things in mind, first you want the rolling circumference of the tyre for your calaculations, not plain 2*Pi*r because they aren't round when in use. The difference is minimal but most tyre manufacturers do quo...
by Rod S
Thu Jun 16, 2016 1:53 am
Forum: I/O Extender
Topic: Components included with I/O Extender
Replies: 2
Views: 1516

Re: Components included with I/O Extender

The 102 is actually 0.001uF Capacitor three digit numbers work that the first two are actual numbers and the third is a multiplier to the power 10 (like the third colour band on a resistor) and the base unit (just to confuse things) is picofarads. so 102 is 10 x 100 pF Another way is to think of it ...
by Rod S
Sun Mar 20, 2016 3:36 am
Forum: General
Topic: alternative to 14point7
Replies: 2
Views: 2369

Re: alternative to 14point7

Strange, I just received two 4.9 controllers (assuming you mean the SLC-OEMs) only 4 days ago. His customer service had appeared to be improving recently. I can't think of any alternative that interfaces so well with Jean's IOx range (digital interface, not analogue) irrespective of price. The Innov...
by Rod S
Fri Mar 18, 2016 10:38 am
Forum: I/O Extender
Topic: Wideband map compensation?
Replies: 17
Views: 12116

Re: Wideband map compensation?

So do you guys think I'm wasting my time by running per cylinder WB in this application? I don't think you are ever wasting your time trying to get more useful data. How important depends on the engine you are working with and it's known features. The engine I, and a few others, work on with multip...
by Rod S
Sun Mar 13, 2016 4:11 am
Forum: I/O Extender
Topic: Wideband map compensation?
Replies: 17
Views: 12116

Re: Wideband map compensation?

Notwithstanding what Jean may be able to do, it's a very interesting question and one I exchanged a few emails with Alan To about a year and a half ago when I was pushing him to get the SLC-OEMs to work with the newer 4.9 LSUs. There are a few of us over here in the UK who run turbocharged "A" serie...